^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Ptrace user space interface.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright IBM Corp. 1999, 2010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author(s): Denis Joseph Barrow
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Martin Schwidefsky (schwidefsky@de.ibm.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/sched/task_stack.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/user.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/security.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/audit.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/regset.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/tracehook.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/seccomp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <trace/syscall.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <asm/page.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <asm/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <asm/switch_to.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <asm/runtime_instr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <asm/facility.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include "entry.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include "compat_ptrace.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define CREATE_TRACE_POINTS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <trace/events/syscalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) void update_cr_regs(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct pt_regs *regs = task_pt_regs(task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct thread_struct *thread = &task->thread;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct per_regs old, new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) union ctlreg0 cr0_old, cr0_new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) union ctlreg2 cr2_old, cr2_new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int cr0_changed, cr2_changed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) __ctl_store(cr0_old.val, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) __ctl_store(cr2_old.val, 2, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) cr0_new = cr0_old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) cr2_new = cr2_old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /* Take care of the enable/disable of transactional execution. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (MACHINE_HAS_TE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /* Set or clear transaction execution TXC bit 8. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) cr0_new.tcx = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (task->thread.per_flags & PER_FLAG_NO_TE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) cr0_new.tcx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* Set or clear transaction execution TDC bits 62 and 63. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) cr2_new.tdc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) if (task->thread.per_flags & PER_FLAG_TE_ABORT_RAND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (task->thread.per_flags & PER_FLAG_TE_ABORT_RAND_TEND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) cr2_new.tdc = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) cr2_new.tdc = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* Take care of enable/disable of guarded storage. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (MACHINE_HAS_GS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) cr2_new.gse = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (task->thread.gs_cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) cr2_new.gse = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) /* Load control register 0/2 iff changed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) cr0_changed = cr0_new.val != cr0_old.val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) cr2_changed = cr2_new.val != cr2_old.val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (cr0_changed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) __ctl_load(cr0_new.val, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (cr2_changed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) __ctl_load(cr2_new.val, 2, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* Copy user specified PER registers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) new.control = thread->per_user.control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) new.start = thread->per_user.start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) new.end = thread->per_user.end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) /* merge TIF_SINGLE_STEP into user specified PER registers. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (test_tsk_thread_flag(task, TIF_SINGLE_STEP) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) test_tsk_thread_flag(task, TIF_UPROBE_SINGLESTEP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (test_tsk_thread_flag(task, TIF_BLOCK_STEP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) new.control |= PER_EVENT_BRANCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) new.control |= PER_EVENT_IFETCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) new.control |= PER_CONTROL_SUSPENSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) new.control |= PER_EVENT_TRANSACTION_END;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (test_tsk_thread_flag(task, TIF_UPROBE_SINGLESTEP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) new.control |= PER_EVENT_IFETCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) new.start = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) new.end = -1UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /* Take care of the PER enablement bit in the PSW. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (!(new.control & PER_EVENT_MASK)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) regs->psw.mask &= ~PSW_MASK_PER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) regs->psw.mask |= PSW_MASK_PER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) __ctl_store(old, 9, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (memcmp(&new, &old, sizeof(struct per_regs)) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) __ctl_load(new, 9, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) void user_enable_single_step(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) clear_tsk_thread_flag(task, TIF_BLOCK_STEP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) set_tsk_thread_flag(task, TIF_SINGLE_STEP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) void user_disable_single_step(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) clear_tsk_thread_flag(task, TIF_BLOCK_STEP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) clear_tsk_thread_flag(task, TIF_SINGLE_STEP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) void user_enable_block_step(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) set_tsk_thread_flag(task, TIF_SINGLE_STEP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) set_tsk_thread_flag(task, TIF_BLOCK_STEP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * Called by kernel/ptrace.c when detaching..
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * Clear all debugging related fields.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) void ptrace_disable(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) memset(&task->thread.per_user, 0, sizeof(task->thread.per_user));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) memset(&task->thread.per_event, 0, sizeof(task->thread.per_event));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) clear_tsk_thread_flag(task, TIF_SINGLE_STEP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) clear_pt_regs_flag(task_pt_regs(task), PIF_PER_TRAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) task->thread.per_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #define __ADDR_MASK 7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static inline unsigned long __peek_user_per(struct task_struct *child,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) addr_t addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct per_struct_kernel *dummy = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (addr == (addr_t) &dummy->cr9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /* Control bits of the active per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) return test_thread_flag(TIF_SINGLE_STEP) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) PER_EVENT_IFETCH : child->thread.per_user.control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) else if (addr == (addr_t) &dummy->cr10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) /* Start address of the active per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return test_thread_flag(TIF_SINGLE_STEP) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 0 : child->thread.per_user.start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) else if (addr == (addr_t) &dummy->cr11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) /* End address of the active per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return test_thread_flag(TIF_SINGLE_STEP) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) -1UL : child->thread.per_user.end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) else if (addr == (addr_t) &dummy->bits)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) /* Single-step bit. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return test_thread_flag(TIF_SINGLE_STEP) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) (1UL << (BITS_PER_LONG - 1)) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) else if (addr == (addr_t) &dummy->starting_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) /* Start address of the user specified per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) return child->thread.per_user.start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) else if (addr == (addr_t) &dummy->ending_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) /* End address of the user specified per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) return child->thread.per_user.end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) else if (addr == (addr_t) &dummy->perc_atmid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) /* PER code, ATMID and AI of the last PER trap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return (unsigned long)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) child->thread.per_event.cause << (BITS_PER_LONG - 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) else if (addr == (addr_t) &dummy->address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) /* Address of the last PER trap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return child->thread.per_event.address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) else if (addr == (addr_t) &dummy->access_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) /* Access id of the last PER trap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return (unsigned long)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) child->thread.per_event.paid << (BITS_PER_LONG - 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * Read the word at offset addr from the user area of a process. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * trouble here is that the information is littered over different
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * locations. The process registers are found on the kernel stack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * the floating point stuff and the trace settings are stored in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * the task structure. In addition the different structures in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * struct user contain pad bytes that should be read as zeroes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * Lovely...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static unsigned long __peek_user(struct task_struct *child, addr_t addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) struct user *dummy = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) addr_t offset, tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) if (addr < (addr_t) &dummy->regs.acrs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) * psw and gprs are stored on the stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) tmp = *(addr_t *)((addr_t) &task_pt_regs(child)->psw + addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (addr == (addr_t) &dummy->regs.psw.mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) /* Return a clean psw mask. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) tmp &= PSW_MASK_USER | PSW_MASK_RI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) tmp |= PSW_USER_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) } else if (addr < (addr_t) &dummy->regs.orig_gpr2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) * access registers are stored in the thread structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) offset = addr - (addr_t) &dummy->regs.acrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * Very special case: old & broken 64 bit gdb reading
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) * from acrs[15]. Result is a 64 bit value. Read the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * 32 bit acrs[15] value and shift it by 32. Sick...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (addr == (addr_t) &dummy->regs.acrs[15])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) tmp = ((unsigned long) child->thread.acrs[15]) << 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) tmp = *(addr_t *)((addr_t) &child->thread.acrs + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) } else if (addr == (addr_t) &dummy->regs.orig_gpr2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * orig_gpr2 is stored on the kernel stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) tmp = (addr_t) task_pt_regs(child)->orig_gpr2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) } else if (addr < (addr_t) &dummy->regs.fp_regs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) * prevent reads of padding hole between
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) * orig_gpr2 and fp_regs on s390.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) tmp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) } else if (addr == (addr_t) &dummy->regs.fp_regs.fpc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) * floating point control reg. is in the thread structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) tmp = child->thread.fpu.fpc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) tmp <<= BITS_PER_LONG - 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) } else if (addr < (addr_t) (&dummy->regs.fp_regs + 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) * floating point regs. are either in child->thread.fpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) * or the child->thread.fpu.vxrs array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) offset = addr - (addr_t) &dummy->regs.fp_regs.fprs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) if (MACHINE_HAS_VX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) tmp = *(addr_t *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) ((addr_t) child->thread.fpu.vxrs + 2*offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) tmp = *(addr_t *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) ((addr_t) child->thread.fpu.fprs + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) } else if (addr < (addr_t) (&dummy->regs.per_info + 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * Handle access to the per_info structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) addr -= (addr_t) &dummy->regs.per_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) tmp = __peek_user_per(child, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) tmp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) return tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) peek_user(struct task_struct *child, addr_t addr, addr_t data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) addr_t tmp, mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * Stupid gdb peeks/pokes the access registers in 64 bit with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) * an alignment of 4. Programmers from hell...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) mask = __ADDR_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) if (addr >= (addr_t) &((struct user *) NULL)->regs.acrs &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) addr < (addr_t) &((struct user *) NULL)->regs.orig_gpr2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) mask = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) tmp = __peek_user(child, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return put_user(tmp, (addr_t __user *) data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static inline void __poke_user_per(struct task_struct *child,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) addr_t addr, addr_t data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) struct per_struct_kernel *dummy = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) * There are only three fields in the per_info struct that the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) * debugger user can write to.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) * 1) cr9: the debugger wants to set a new PER event mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * 2) starting_addr: the debugger wants to set a new starting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * address to use with the PER event mask.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * 3) ending_addr: the debugger wants to set a new ending
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * address to use with the PER event mask.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * The user specified PER event mask and the start and end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) * addresses are used only if single stepping is not in effect.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * Writes to any other field in per_info are ignored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) if (addr == (addr_t) &dummy->cr9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) /* PER event mask of the user specified per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) child->thread.per_user.control =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) data & (PER_EVENT_MASK | PER_CONTROL_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) else if (addr == (addr_t) &dummy->starting_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /* Starting address of the user specified per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) child->thread.per_user.start = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) else if (addr == (addr_t) &dummy->ending_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) /* Ending address of the user specified per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) child->thread.per_user.end = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) static void fixup_int_code(struct task_struct *child, addr_t data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) struct pt_regs *regs = task_pt_regs(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) int ilc = regs->int_code >> 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) u16 insn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) if (ilc > 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (ptrace_access_vm(child, regs->psw.addr - (regs->int_code >> 16),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) &insn, sizeof(insn), FOLL_FORCE) != sizeof(insn))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) /* double check that tracee stopped on svc instruction */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if ((insn >> 8) != 0xa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) regs->int_code = 0x20000 | (data & 0xffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) * Write a word to the user area of a process at location addr. This
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) * operation does have an additional problem compared to peek_user.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) * Stores to the program status word and on the floating point
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) * control register needs to get checked for validity.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) struct user *dummy = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) addr_t offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) if (addr < (addr_t) &dummy->regs.acrs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) struct pt_regs *regs = task_pt_regs(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) * psw and gprs are stored on the stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (addr == (addr_t) &dummy->regs.psw.mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) unsigned long mask = PSW_MASK_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) mask |= is_ri_task(child) ? PSW_MASK_RI : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) if ((data ^ PSW_USER_BITS) & ~mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) /* Invalid psw mask. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if ((data & PSW_MASK_ASC) == PSW_ASC_HOME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) /* Invalid address-space-control bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if ((data & PSW_MASK_EA) && !(data & PSW_MASK_BA))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) /* Invalid addressing mode bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if (test_pt_regs_flag(regs, PIF_SYSCALL) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) addr == offsetof(struct user, regs.gprs[2]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) fixup_int_code(child, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) *(addr_t *)((addr_t) ®s->psw + addr) = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) } else if (addr < (addr_t) (&dummy->regs.orig_gpr2)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) * access registers are stored in the thread structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) offset = addr - (addr_t) &dummy->regs.acrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) * Very special case: old & broken 64 bit gdb writing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) * to acrs[15] with a 64 bit value. Ignore the lower
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) * half of the value and write the upper 32 bit to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) * acrs[15]. Sick...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) if (addr == (addr_t) &dummy->regs.acrs[15])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) child->thread.acrs[15] = (unsigned int) (data >> 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) *(addr_t *)((addr_t) &child->thread.acrs + offset) = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) } else if (addr == (addr_t) &dummy->regs.orig_gpr2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) * orig_gpr2 is stored on the kernel stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) task_pt_regs(child)->orig_gpr2 = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) } else if (addr < (addr_t) &dummy->regs.fp_regs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) * prevent writes of padding hole between
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * orig_gpr2 and fp_regs on s390.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) } else if (addr == (addr_t) &dummy->regs.fp_regs.fpc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) * floating point control reg. is in the thread structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) if ((unsigned int) data != 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) test_fp_ctl(data >> (BITS_PER_LONG - 32)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) child->thread.fpu.fpc = data >> (BITS_PER_LONG - 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) } else if (addr < (addr_t) (&dummy->regs.fp_regs + 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * floating point regs. are either in child->thread.fpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) * or the child->thread.fpu.vxrs array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) offset = addr - (addr_t) &dummy->regs.fp_regs.fprs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (MACHINE_HAS_VX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) *(addr_t *)((addr_t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) child->thread.fpu.vxrs + 2*offset) = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) *(addr_t *)((addr_t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) child->thread.fpu.fprs + offset) = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) } else if (addr < (addr_t) (&dummy->regs.per_info + 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) * Handle access to the per_info structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) addr -= (addr_t) &dummy->regs.per_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) __poke_user_per(child, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) static int poke_user(struct task_struct *child, addr_t addr, addr_t data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) addr_t mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) * Stupid gdb peeks/pokes the access registers in 64 bit with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) * an alignment of 4. Programmers from hell indeed...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) mask = __ADDR_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) if (addr >= (addr_t) &((struct user *) NULL)->regs.acrs &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) addr < (addr_t) &((struct user *) NULL)->regs.orig_gpr2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) mask = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) return __poke_user(child, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) long arch_ptrace(struct task_struct *child, long request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) unsigned long addr, unsigned long data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) ptrace_area parea;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) int copied, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) switch (request) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) case PTRACE_PEEKUSR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) /* read the word at location addr in the USER area. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) return peek_user(child, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) case PTRACE_POKEUSR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) /* write the word at location addr in the USER area */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) return poke_user(child, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) case PTRACE_PEEKUSR_AREA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) case PTRACE_POKEUSR_AREA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) if (copy_from_user(&parea, (void __force __user *) addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) sizeof(parea)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) addr = parea.kernel_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) data = parea.process_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) copied = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) while (copied < parea.len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (request == PTRACE_PEEKUSR_AREA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) ret = peek_user(child, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) addr_t utmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) if (get_user(utmp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) (addr_t __force __user *) data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) ret = poke_user(child, addr, utmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) addr += sizeof(unsigned long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) data += sizeof(unsigned long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) copied += sizeof(unsigned long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) case PTRACE_GET_LAST_BREAK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) put_user(child->thread.last_break,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) (unsigned long __user *) data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) case PTRACE_ENABLE_TE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) if (!MACHINE_HAS_TE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) child->thread.per_flags &= ~PER_FLAG_NO_TE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) case PTRACE_DISABLE_TE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (!MACHINE_HAS_TE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) child->thread.per_flags |= PER_FLAG_NO_TE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) child->thread.per_flags &= ~PER_FLAG_TE_ABORT_RAND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) case PTRACE_TE_ABORT_RAND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) if (!MACHINE_HAS_TE || (child->thread.per_flags & PER_FLAG_NO_TE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) switch (data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) case 0UL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) child->thread.per_flags &= ~PER_FLAG_TE_ABORT_RAND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) case 1UL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) child->thread.per_flags |= PER_FLAG_TE_ABORT_RAND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) child->thread.per_flags |= PER_FLAG_TE_ABORT_RAND_TEND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) case 2UL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) child->thread.per_flags |= PER_FLAG_TE_ABORT_RAND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) child->thread.per_flags &= ~PER_FLAG_TE_ABORT_RAND_TEND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) return ptrace_request(child, request, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) * Now the fun part starts... a 31 bit program running in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) * 31 bit emulation tracing another program. PTRACE_PEEKTEXT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) * PTRACE_PEEKDATA, PTRACE_POKETEXT and PTRACE_POKEDATA are easy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) * to handle, the difference to the 64 bit versions of the requests
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) * is that the access is done in multiples of 4 byte instead of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) * 8 bytes (sizeof(unsigned long) on 31/64 bit).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) * The ugly part are PTRACE_PEEKUSR, PTRACE_PEEKUSR_AREA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) * PTRACE_POKEUSR and PTRACE_POKEUSR_AREA. If the traced program
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) * is a 31 bit program too, the content of struct user can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) * emulated. A 31 bit program peeking into the struct user of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) * a 64 bit program is a no-no.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) * Same as peek_user_per but for a 31 bit program.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) static inline __u32 __peek_user_per_compat(struct task_struct *child,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) addr_t addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) struct compat_per_struct_kernel *dummy32 = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) if (addr == (addr_t) &dummy32->cr9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) /* Control bits of the active per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) PER_EVENT_IFETCH : child->thread.per_user.control;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) else if (addr == (addr_t) &dummy32->cr10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) /* Start address of the active per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) 0 : child->thread.per_user.start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) else if (addr == (addr_t) &dummy32->cr11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) /* End address of the active per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) return test_thread_flag(TIF_SINGLE_STEP) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) PSW32_ADDR_INSN : child->thread.per_user.end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) else if (addr == (addr_t) &dummy32->bits)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) /* Single-step bit. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) return (__u32) test_thread_flag(TIF_SINGLE_STEP) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) 0x80000000 : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) else if (addr == (addr_t) &dummy32->starting_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) /* Start address of the user specified per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) return (__u32) child->thread.per_user.start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) else if (addr == (addr_t) &dummy32->ending_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) /* End address of the user specified per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) return (__u32) child->thread.per_user.end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) else if (addr == (addr_t) &dummy32->perc_atmid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) /* PER code, ATMID and AI of the last PER trap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) return (__u32) child->thread.per_event.cause << 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) else if (addr == (addr_t) &dummy32->address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) /* Address of the last PER trap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) return (__u32) child->thread.per_event.address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) else if (addr == (addr_t) &dummy32->access_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) /* Access id of the last PER trap */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) return (__u32) child->thread.per_event.paid << 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) * Same as peek_user but for a 31 bit program.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) static u32 __peek_user_compat(struct task_struct *child, addr_t addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) struct compat_user *dummy32 = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) addr_t offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) __u32 tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) if (addr < (addr_t) &dummy32->regs.acrs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) struct pt_regs *regs = task_pt_regs(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) * psw and gprs are stored on the stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) if (addr == (addr_t) &dummy32->regs.psw.mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) /* Fake a 31 bit psw mask. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) tmp = (__u32)(regs->psw.mask >> 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) tmp &= PSW32_MASK_USER | PSW32_MASK_RI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) tmp |= PSW32_USER_BITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) } else if (addr == (addr_t) &dummy32->regs.psw.addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) /* Fake a 31 bit psw address. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) tmp = (__u32) regs->psw.addr |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) (__u32)(regs->psw.mask & PSW_MASK_BA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) /* gpr 0-15 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) tmp = *(__u32 *)((addr_t) ®s->psw + addr*2 + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) } else if (addr < (addr_t) (&dummy32->regs.orig_gpr2)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) * access registers are stored in the thread structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) offset = addr - (addr_t) &dummy32->regs.acrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) tmp = *(__u32*)((addr_t) &child->thread.acrs + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) } else if (addr == (addr_t) (&dummy32->regs.orig_gpr2)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) * orig_gpr2 is stored on the kernel stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) tmp = *(__u32*)((addr_t) &task_pt_regs(child)->orig_gpr2 + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) } else if (addr < (addr_t) &dummy32->regs.fp_regs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) * prevent reads of padding hole between
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) * orig_gpr2 and fp_regs on s390.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) tmp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) } else if (addr == (addr_t) &dummy32->regs.fp_regs.fpc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) * floating point control reg. is in the thread structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) tmp = child->thread.fpu.fpc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) } else if (addr < (addr_t) (&dummy32->regs.fp_regs + 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) * floating point regs. are either in child->thread.fpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) * or the child->thread.fpu.vxrs array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) offset = addr - (addr_t) &dummy32->regs.fp_regs.fprs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) if (MACHINE_HAS_VX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) tmp = *(__u32 *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) ((addr_t) child->thread.fpu.vxrs + 2*offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) tmp = *(__u32 *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) ((addr_t) child->thread.fpu.fprs + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) } else if (addr < (addr_t) (&dummy32->regs.per_info + 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) * Handle access to the per_info structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) addr -= (addr_t) &dummy32->regs.per_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) tmp = __peek_user_per_compat(child, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) tmp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) return tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) static int peek_user_compat(struct task_struct *child,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) addr_t addr, addr_t data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) __u32 tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user) - 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) tmp = __peek_user_compat(child, addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) return put_user(tmp, (__u32 __user *) data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) * Same as poke_user_per but for a 31 bit program.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) static inline void __poke_user_per_compat(struct task_struct *child,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) addr_t addr, __u32 data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) struct compat_per_struct_kernel *dummy32 = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) if (addr == (addr_t) &dummy32->cr9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) /* PER event mask of the user specified per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) child->thread.per_user.control =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) data & (PER_EVENT_MASK | PER_CONTROL_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) else if (addr == (addr_t) &dummy32->starting_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) /* Starting address of the user specified per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) child->thread.per_user.start = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) else if (addr == (addr_t) &dummy32->ending_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) /* Ending address of the user specified per set. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) child->thread.per_user.end = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) * Same as poke_user but for a 31 bit program.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) static int __poke_user_compat(struct task_struct *child,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) addr_t addr, addr_t data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) struct compat_user *dummy32 = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) __u32 tmp = (__u32) data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) addr_t offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) if (addr < (addr_t) &dummy32->regs.acrs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) struct pt_regs *regs = task_pt_regs(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) * psw, gprs, acrs and orig_gpr2 are stored on the stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) if (addr == (addr_t) &dummy32->regs.psw.mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) __u32 mask = PSW32_MASK_USER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) mask |= is_ri_task(child) ? PSW32_MASK_RI : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) /* Build a 64 bit psw mask from 31 bit mask. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) if ((tmp ^ PSW32_USER_BITS) & ~mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) /* Invalid psw mask. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) if ((data & PSW32_MASK_ASC) == PSW32_ASC_HOME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) /* Invalid address-space-control bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) regs->psw.mask = (regs->psw.mask & ~PSW_MASK_USER) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) (regs->psw.mask & PSW_MASK_BA) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) (__u64)(tmp & mask) << 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) } else if (addr == (addr_t) &dummy32->regs.psw.addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) /* Build a 64 bit psw address from 31 bit address. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) regs->psw.addr = (__u64) tmp & PSW32_ADDR_INSN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) /* Transfer 31 bit amode bit to psw mask. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) regs->psw.mask = (regs->psw.mask & ~PSW_MASK_BA) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) (__u64)(tmp & PSW32_ADDR_AMODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) if (test_pt_regs_flag(regs, PIF_SYSCALL) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) addr == offsetof(struct compat_user, regs.gprs[2]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) fixup_int_code(child, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) /* gpr 0-15 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) *(__u32*)((addr_t) ®s->psw + addr*2 + 4) = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) } else if (addr < (addr_t) (&dummy32->regs.orig_gpr2)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) * access registers are stored in the thread structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) offset = addr - (addr_t) &dummy32->regs.acrs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) *(__u32*)((addr_t) &child->thread.acrs + offset) = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) } else if (addr == (addr_t) (&dummy32->regs.orig_gpr2)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) * orig_gpr2 is stored on the kernel stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) *(__u32*)((addr_t) &task_pt_regs(child)->orig_gpr2 + 4) = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) } else if (addr < (addr_t) &dummy32->regs.fp_regs) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) * prevent writess of padding hole between
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) * orig_gpr2 and fp_regs on s390.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) } else if (addr == (addr_t) &dummy32->regs.fp_regs.fpc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) * floating point control reg. is in the thread structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) if (test_fp_ctl(tmp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) child->thread.fpu.fpc = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) } else if (addr < (addr_t) (&dummy32->regs.fp_regs + 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) * floating point regs. are either in child->thread.fpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) * or the child->thread.fpu.vxrs array
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) offset = addr - (addr_t) &dummy32->regs.fp_regs.fprs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) if (MACHINE_HAS_VX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) *(__u32 *)((addr_t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) child->thread.fpu.vxrs + 2*offset) = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) *(__u32 *)((addr_t)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) child->thread.fpu.fprs + offset) = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) } else if (addr < (addr_t) (&dummy32->regs.per_info + 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) * Handle access to the per_info structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) addr -= (addr_t) &dummy32->regs.per_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) __poke_user_per_compat(child, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) static int poke_user_compat(struct task_struct *child,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) addr_t addr, addr_t data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) if (!is_compat_task() || (addr & 3) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808) addr > sizeof(struct compat_user) - 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) return __poke_user_compat(child, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) compat_ulong_t caddr, compat_ulong_t cdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) unsigned long addr = caddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) unsigned long data = cdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) compat_ptrace_area parea;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) int copied, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) switch (request) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) case PTRACE_PEEKUSR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) /* read the word at location addr in the USER area. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) return peek_user_compat(child, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) case PTRACE_POKEUSR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) /* write the word at location addr in the USER area */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) return poke_user_compat(child, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) case PTRACE_PEEKUSR_AREA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) case PTRACE_POKEUSR_AREA:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) if (copy_from_user(&parea, (void __force __user *) addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) sizeof(parea)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) addr = parea.kernel_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) data = parea.process_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) copied = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) while (copied < parea.len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) if (request == PTRACE_PEEKUSR_AREA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) ret = peek_user_compat(child, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) __u32 utmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) if (get_user(utmp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) (__u32 __force __user *) data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) ret = poke_user_compat(child, addr, utmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) addr += sizeof(unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) data += sizeof(unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) copied += sizeof(unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) case PTRACE_GET_LAST_BREAK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) put_user(child->thread.last_break,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) (unsigned int __user *) data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) return compat_ptrace_request(child, request, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) unsigned long mask = -1UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) long ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) if (is_compat_task())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) mask = 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) * The sysc_tracesys code in entry.S stored the system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) * call number to gprs[2].
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) if (test_thread_flag(TIF_SYSCALL_TRACE) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) tracehook_report_syscall_entry(regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) * Tracing decided this syscall should not happen. Skip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) * the system call and the system call restart handling.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) goto skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) #ifdef CONFIG_SECCOMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) /* Do the secure computing check after ptrace. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) if (unlikely(test_thread_flag(TIF_SECCOMP))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) struct seccomp_data sd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) if (is_compat_task()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) sd.instruction_pointer = regs->psw.addr & 0x7fffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) sd.arch = AUDIT_ARCH_S390;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) sd.instruction_pointer = regs->psw.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) sd.arch = AUDIT_ARCH_S390X;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) sd.nr = regs->int_code & 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) sd.args[0] = regs->orig_gpr2 & mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) sd.args[1] = regs->gprs[3] & mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) sd.args[2] = regs->gprs[4] & mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) sd.args[3] = regs->gprs[5] & mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) sd.args[4] = regs->gprs[6] & mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) sd.args[5] = regs->gprs[7] & mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) if (__secure_computing(&sd) == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) goto skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) #endif /* CONFIG_SECCOMP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) trace_sys_enter(regs, regs->int_code & 0xffff);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) audit_syscall_entry(regs->int_code & 0xffff, regs->orig_gpr2 & mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) regs->gprs[3] &mask, regs->gprs[4] &mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) regs->gprs[5] &mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) if ((signed long)regs->gprs[2] >= NR_syscalls) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) regs->gprs[2] = -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) ret = -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) return regs->gprs[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) skip:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) clear_pt_regs_flag(regs, PIF_SYSCALL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) asmlinkage void do_syscall_trace_exit(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) audit_syscall_exit(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) trace_sys_exit(regs, regs->gprs[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) if (test_thread_flag(TIF_SYSCALL_TRACE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) tracehook_report_syscall_exit(regs, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) * user_regset definitions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) static int s390_regs_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) unsigned pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) save_access_regs(target->thread.acrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) for (pos = 0; pos < sizeof(s390_regs); pos += sizeof(long))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) membuf_store(&to, __peek_user(target, pos));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) static int s390_regs_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) save_access_regs(target->thread.acrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) if (kbuf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) const unsigned long *k = kbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) while (count > 0 && !rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) rc = __poke_user(target, pos, *k++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) count -= sizeof(*k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) pos += sizeof(*k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) const unsigned long __user *u = ubuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) while (count > 0 && !rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) unsigned long word;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) rc = __get_user(word, u++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) rc = __poke_user(target, pos, word);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) count -= sizeof(*u);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) pos += sizeof(*u);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) if (rc == 0 && target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) restore_access_regs(target->thread.acrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) static int s390_fpregs_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998) _s390_fp_regs fp_regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001) save_fpu_regs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) fp_regs.fpc = target->thread.fpu.fpc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004) fpregs_store(&fp_regs, &target->thread.fpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) return membuf_write(&to, &fp_regs, sizeof(fp_regs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) static int s390_fpregs_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010) const struct user_regset *regset, unsigned int pos,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) unsigned int count, const void *kbuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) freg_t fprs[__NUM_FPRS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) save_fpu_regs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020) if (MACHINE_HAS_VX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) convert_vx_to_fp(fprs, target->thread.fpu.vxrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) memcpy(&fprs, target->thread.fpu.fprs, sizeof(fprs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) /* If setting FPC, must validate it first. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) if (count > 0 && pos < offsetof(s390_fp_regs, fprs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027) u32 ufpc[2] = { target->thread.fpu.fpc, 0 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &ufpc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) 0, offsetof(s390_fp_regs, fprs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) if (ufpc[1] != 0 || test_fp_ctl(ufpc[0]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) target->thread.fpu.fpc = ufpc[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) if (rc == 0 && count > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039) fprs, offsetof(s390_fp_regs, fprs), -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) if (MACHINE_HAS_VX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) convert_fp_to_vx(target->thread.fpu.vxrs, fprs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) memcpy(target->thread.fpu.fprs, &fprs, sizeof(fprs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051) static int s390_last_break_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) return membuf_store(&to, target->thread.last_break);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) static int s390_last_break_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) static int s390_tdb_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) struct pt_regs *regs = task_pt_regs(target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) if (!(regs->int_code & 0x200))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) return -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) return membuf_write(&to, target->thread.trap_tdb, 256);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) static int s390_tdb_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) static int s390_vxrs_low_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089) __u64 vxrs[__NUM_VXRS_LOW];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) if (!MACHINE_HAS_VX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) save_fpu_regs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) for (i = 0; i < __NUM_VXRS_LOW; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) vxrs[i] = *((__u64 *)(target->thread.fpu.vxrs + i) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) return membuf_write(&to, vxrs, sizeof(vxrs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) static int s390_vxrs_low_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) __u64 vxrs[__NUM_VXRS_LOW];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) int i, rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) if (!MACHINE_HAS_VX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) save_fpu_regs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114) for (i = 0; i < __NUM_VXRS_LOW; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) vxrs[i] = *((__u64 *)(target->thread.fpu.vxrs + i) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117) rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf, vxrs, 0, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) if (rc == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) for (i = 0; i < __NUM_VXRS_LOW; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) *((__u64 *)(target->thread.fpu.vxrs + i) + 1) = vxrs[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) static int s390_vxrs_high_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) if (!MACHINE_HAS_VX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) save_fpu_regs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) return membuf_write(&to, target->thread.fpu.vxrs + __NUM_VXRS_LOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) __NUM_VXRS_HIGH * sizeof(__vector128));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) static int s390_vxrs_high_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144) if (!MACHINE_HAS_VX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) save_fpu_regs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149) rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) target->thread.fpu.vxrs + __NUM_VXRS_LOW, 0, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154) static int s390_system_call_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) return membuf_store(&to, target->thread.system_call);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) static int s390_system_call_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) unsigned int *data = &target->thread.system_call;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) data, 0, sizeof(unsigned int));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) static int s390_gs_cb_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) struct gs_cb *data = target->thread.gs_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) if (!MACHINE_HAS_GS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180) return -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) save_gs_cb(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) return membuf_write(&to, data, sizeof(struct gs_cb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) static int s390_gs_cb_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) struct gs_cb gs_cb = { }, *data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) if (!MACHINE_HAS_GS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196) if (!target->thread.gs_cb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) data = kzalloc(sizeof(*data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) if (!target->thread.gs_cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) gs_cb.gsd = 25;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) else if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) save_gs_cb(&gs_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) gs_cb = *target->thread.gs_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207) rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) &gs_cb, 0, sizeof(gs_cb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) kfree(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) if (!target->thread.gs_cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215) target->thread.gs_cb = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) *target->thread.gs_cb = gs_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) if (target == current) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) __ctl_set_bit(2, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) restore_gs_cb(target->thread.gs_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) static int s390_gs_bc_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) struct gs_cb *data = target->thread.gs_bc_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) if (!MACHINE_HAS_GS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) return -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) return membuf_write(&to, data, sizeof(struct gs_cb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) static int s390_gs_bc_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) struct gs_cb *data = target->thread.gs_bc_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) if (!MACHINE_HAS_GS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) if (!data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) data = kzalloc(sizeof(*data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) target->thread.gs_bc_cb = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) return user_regset_copyin(&pos, &count, &kbuf, &ubuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) data, 0, sizeof(struct gs_cb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) static bool is_ri_cb_valid(struct runtime_instr_cb *cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) return (cb->rca & 0x1f) == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) (cb->roa & 0xfff) == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) (cb->rla & 0xfff) == 0xfff &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) cb->s == 1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263) cb->k == 1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) cb->h == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) cb->reserved1 == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266) cb->ps == 1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) cb->qs == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) cb->pc == 1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) cb->qc == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) cb->reserved2 == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271) cb->reserved3 == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) cb->reserved4 == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) cb->reserved5 == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274) cb->reserved6 == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) cb->reserved7 == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) cb->reserved8 == 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277) cb->rla >= cb->roa &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) cb->rca >= cb->roa &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) cb->rca <= cb->rla+1 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) cb->m < 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283) static int s390_runtime_instr_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) struct runtime_instr_cb *data = target->thread.ri_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289) if (!test_facility(64))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) return -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) return membuf_write(&to, data, sizeof(struct runtime_instr_cb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297) static int s390_runtime_instr_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302) struct runtime_instr_cb ri_cb = { }, *data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) if (!test_facility(64))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) if (!target->thread.ri_cb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) data = kzalloc(sizeof(*data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) if (!data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) if (target->thread.ri_cb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) store_runtime_instr_cb(&ri_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) ri_cb = *target->thread.ri_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) rc = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) &ri_cb, 0, sizeof(struct runtime_instr_cb));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) kfree(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) if (!is_ri_cb_valid(&ri_cb)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) kfree(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) * Override access key in any case, since user space should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) * not be able to set it, nor should it care about it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336) ri_cb.key = PAGE_DEFAULT_KEY >> 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) if (!target->thread.ri_cb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) target->thread.ri_cb = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) *target->thread.ri_cb = ri_cb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) load_runtime_instr_cb(target->thread.ri_cb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348) static const struct user_regset s390_regsets[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) .core_note_type = NT_PRSTATUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351) .n = sizeof(s390_regs) / sizeof(long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) .size = sizeof(long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) .align = sizeof(long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) .regset_get = s390_regs_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) .set = s390_regs_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358) .core_note_type = NT_PRFPREG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) .n = sizeof(s390_fp_regs) / sizeof(long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) .size = sizeof(long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) .align = sizeof(long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) .regset_get = s390_fpregs_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) .set = s390_fpregs_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) .core_note_type = NT_S390_SYSTEM_CALL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) .n = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368) .size = sizeof(unsigned int),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) .align = sizeof(unsigned int),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) .regset_get = s390_system_call_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371) .set = s390_system_call_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374) .core_note_type = NT_S390_LAST_BREAK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) .n = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) .size = sizeof(long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) .align = sizeof(long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) .regset_get = s390_last_break_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379) .set = s390_last_break_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) .core_note_type = NT_S390_TDB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) .n = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384) .size = 256,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) .align = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) .regset_get = s390_tdb_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387) .set = s390_tdb_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390) .core_note_type = NT_S390_VXRS_LOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) .n = __NUM_VXRS_LOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) .size = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) .align = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) .regset_get = s390_vxrs_low_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) .set = s390_vxrs_low_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) .core_note_type = NT_S390_VXRS_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) .n = __NUM_VXRS_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) .size = sizeof(__vector128),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) .align = sizeof(__vector128),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402) .regset_get = s390_vxrs_high_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) .set = s390_vxrs_high_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) .core_note_type = NT_S390_GS_CB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407) .n = sizeof(struct gs_cb) / sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) .size = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) .align = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) .regset_get = s390_gs_cb_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) .set = s390_gs_cb_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) .core_note_type = NT_S390_GS_BC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) .n = sizeof(struct gs_cb) / sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416) .size = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) .align = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418) .regset_get = s390_gs_bc_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) .set = s390_gs_bc_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) .core_note_type = NT_S390_RI_CB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) .n = sizeof(struct runtime_instr_cb) / sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) .size = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) .align = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) .regset_get = s390_runtime_instr_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) .set = s390_runtime_instr_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) static const struct user_regset_view user_s390_view = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) .name = "s390x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) .e_machine = EM_S390,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) .regsets = s390_regsets,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) .n = ARRAY_SIZE(s390_regsets)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) static int s390_compat_regs_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) unsigned n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) save_access_regs(target->thread.acrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) for (n = 0; n < sizeof(s390_compat_regs); n += sizeof(compat_ulong_t))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) membuf_store(&to, __peek_user_compat(target, n));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) static int s390_compat_regs_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) save_access_regs(target->thread.acrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) if (kbuf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) const compat_ulong_t *k = kbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) while (count > 0 && !rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) rc = __poke_user_compat(target, pos, *k++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) count -= sizeof(*k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) pos += sizeof(*k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) const compat_ulong_t __user *u = ubuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472) while (count > 0 && !rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) compat_ulong_t word;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) rc = __get_user(word, u++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) rc = __poke_user_compat(target, pos, word);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) count -= sizeof(*u);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) pos += sizeof(*u);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) if (rc == 0 && target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) restore_access_regs(target->thread.acrs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) static int s390_compat_regs_high_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) compat_ulong_t *gprs_high;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) gprs_high = (compat_ulong_t *)task_pt_regs(target)->gprs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) for (i = 0; i < NUM_GPRS; i++, gprs_high += 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) membuf_store(&to, *gprs_high);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) static int s390_compat_regs_high_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) compat_ulong_t *gprs_high;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) gprs_high = (compat_ulong_t *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) &task_pt_regs(target)->gprs[pos / sizeof(compat_ulong_t)];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) if (kbuf) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) const compat_ulong_t *k = kbuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) while (count > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) *gprs_high = *k++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) *gprs_high += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517) count -= sizeof(*k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) const compat_ulong_t __user *u = ubuf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) while (count > 0 && !rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) unsigned long word;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523) rc = __get_user(word, u++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) *gprs_high = word;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527) *gprs_high += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) count -= sizeof(*u);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) static int s390_compat_last_break_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) compat_ulong_t last_break = target->thread.last_break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) return membuf_store(&to, (unsigned long)last_break);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) static int s390_compat_last_break_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) static const struct user_regset s390_compat_regsets[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) .core_note_type = NT_PRSTATUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) .n = sizeof(s390_compat_regs) / sizeof(compat_long_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556) .size = sizeof(compat_long_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) .align = sizeof(compat_long_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) .regset_get = s390_compat_regs_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) .set = s390_compat_regs_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) .core_note_type = NT_PRFPREG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) .n = sizeof(s390_fp_regs) / sizeof(compat_long_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564) .size = sizeof(compat_long_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) .align = sizeof(compat_long_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) .regset_get = s390_fpregs_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) .set = s390_fpregs_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570) .core_note_type = NT_S390_SYSTEM_CALL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) .n = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) .size = sizeof(compat_uint_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) .align = sizeof(compat_uint_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) .regset_get = s390_system_call_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) .set = s390_system_call_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) .core_note_type = NT_S390_LAST_BREAK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) .n = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) .size = sizeof(long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) .align = sizeof(long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) .regset_get = s390_compat_last_break_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) .set = s390_compat_last_break_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) .core_note_type = NT_S390_TDB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) .n = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) .size = 256,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) .align = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590) .regset_get = s390_tdb_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) .set = s390_tdb_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) .core_note_type = NT_S390_VXRS_LOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) .n = __NUM_VXRS_LOW,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) .size = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597) .align = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) .regset_get = s390_vxrs_low_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599) .set = s390_vxrs_low_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) .core_note_type = NT_S390_VXRS_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) .n = __NUM_VXRS_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604) .size = sizeof(__vector128),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) .align = sizeof(__vector128),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) .regset_get = s390_vxrs_high_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) .set = s390_vxrs_high_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) .core_note_type = NT_S390_HIGH_GPRS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) .n = sizeof(s390_compat_regs_high) / sizeof(compat_long_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) .size = sizeof(compat_long_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) .align = sizeof(compat_long_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) .regset_get = s390_compat_regs_high_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) .set = s390_compat_regs_high_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) .core_note_type = NT_S390_GS_CB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) .n = sizeof(struct gs_cb) / sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) .size = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) .align = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) .regset_get = s390_gs_cb_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) .set = s390_gs_cb_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) .core_note_type = NT_S390_GS_BC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627) .n = sizeof(struct gs_cb) / sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) .size = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) .align = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) .regset_get = s390_gs_bc_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631) .set = s390_gs_bc_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) .core_note_type = NT_S390_RI_CB,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) .n = sizeof(struct runtime_instr_cb) / sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) .size = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) .align = sizeof(__u64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) .regset_get = s390_runtime_instr_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) .set = s390_runtime_instr_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) static const struct user_regset_view user_s390_compat_view = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644) .name = "s390",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) .e_machine = EM_S390,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) .regsets = s390_compat_regsets,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) .n = ARRAY_SIZE(s390_compat_regsets)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) const struct user_regset_view *task_user_regset_view(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) #ifdef CONFIG_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) if (test_tsk_thread_flag(task, TIF_31BIT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655) return &user_s390_compat_view;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657) return &user_s390_view;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) static const char *gpr_names[NUM_GPRS] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) unsigned long regs_get_register(struct pt_regs *regs, unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667) if (offset >= NUM_GPRS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) return regs->gprs[offset];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672) int regs_query_register_offset(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) unsigned long offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676) if (!name || *name != 'r')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) if (kstrtoul(name + 1, 10, &offset))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) if (offset >= NUM_GPRS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) return offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) const char *regs_query_register_name(unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) if (offset >= NUM_GPRS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) return gpr_names[offset];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) static int regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) unsigned long ksp = kernel_stack_pointer(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) return (addr & ~(THREAD_SIZE - 1)) == (ksp & ~(THREAD_SIZE - 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) * regs_get_kernel_stack_nth() - get Nth entry of the stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) * @regs:pt_regs which contains kernel stack pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) * @n:stack entry number.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) * is specifined by @regs. If the @n th entry is NOT in the kernel stack,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) * this returns 0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710) unsigned long addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) addr = kernel_stack_pointer(regs) + n * sizeof(long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713) if (!regs_within_kernel_stack(regs, addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) return *(unsigned long *)addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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