^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) /* arch/sparc64/kernel/signal32.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 1991, 1992 Linus Torvalds
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^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/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/wait.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/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/binfmts.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/compat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/bitops.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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <asm/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <asm/psrcompat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <asm/fpumacro.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <asm/visasm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <asm/compat_signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <asm/switch_to.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include "sigutil.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include "kernel.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) /* This magic should be in g_upper[0] for all upper parts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * to be valid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define SIGINFO_EXTRA_V8PLUS_MAGIC 0x130e269
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) typedef struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) unsigned int g_upper[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) unsigned int o_upper[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) unsigned int asi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) } siginfo_extra_v8plus_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct signal_frame32 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct sparc_stackf32 ss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) __siginfo32_t info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) /* __siginfo_fpu_t * */ u32 fpu_save;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) unsigned int insns[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) unsigned int extramask[_COMPAT_NSIG_WORDS - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /* Only valid if (info.si_regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) siginfo_extra_v8plus_t v8plus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* __siginfo_rwin_t * */u32 rwin_save;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) } __attribute__((aligned(8)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct rt_signal_frame32 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct sparc_stackf32 ss;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) compat_siginfo_t info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct pt_regs32 regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) compat_sigset_t mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) /* __siginfo_fpu_t * */ u32 fpu_save;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) unsigned int insns[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) compat_stack_t stack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* Only valid if (regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) siginfo_extra_v8plus_t v8plus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* __siginfo_rwin_t * */u32 rwin_save;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) } __attribute__((aligned(8)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /* Checks if the fp is valid. We always build signal frames which are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * 16-byte aligned, therefore we can always enforce that the restore
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * frame has that property as well.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static bool invalid_frame_pointer(void __user *fp, int fplen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if ((((unsigned long) fp) & 15) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ((unsigned long)fp) > 0x100000000ULL - fplen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) void do_sigreturn32(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct signal_frame32 __user *sf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) compat_uptr_t fpu_save;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) compat_uptr_t rwin_save;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) unsigned int psr, ufp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) unsigned int pc, npc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) sigset_t set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) compat_sigset_t seta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) int err, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /* Always make any pending restarted system calls return -EINTR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) current->restart_block.fn = do_no_restart_syscall;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) synchronize_user_stack();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) sf = (struct signal_frame32 __user *) regs->u_regs[UREG_FP];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) /* 1. Make sure we are not getting garbage from the user */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (invalid_frame_pointer(sf, sizeof(*sf)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (get_user(ufp, &sf->info.si_regs.u_regs[UREG_FP]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (ufp & 0x7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (__get_user(pc, &sf->info.si_regs.pc) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) __get_user(npc, &sf->info.si_regs.npc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if ((pc | npc) & 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (test_thread_flag(TIF_32BIT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) pc &= 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) npc &= 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) regs->tpc = pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) regs->tnpc = npc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /* 2. Restore the state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) err = __get_user(regs->y, &sf->info.si_regs.y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) err |= __get_user(psr, &sf->info.si_regs.psr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) for (i = UREG_G1; i <= UREG_I7; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) err |= __get_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) err |= __get_user(i, &sf->v8plus.g_upper[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) unsigned long asi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) for (i = UREG_G1; i <= UREG_I7; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) err |= __get_user(asi, &sf->v8plus.asi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) regs->tstate &= ~TSTATE_ASI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) regs->tstate |= ((asi & 0xffUL) << 24UL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) /* User can only change condition codes in %tstate. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) regs->tstate |= psr_to_tstate_icc(psr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) /* Prevent syscall restart. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) pt_regs_clear_syscall(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) err |= __get_user(fpu_save, &sf->fpu_save);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) if (!err && fpu_save)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) err |= restore_fpu_state(regs, compat_ptr(fpu_save));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) err |= __get_user(rwin_save, &sf->rwin_save);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) if (!err && rwin_save) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (restore_rwin_state(compat_ptr(rwin_save)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) err |= __get_user(seta.sig[0], &sf->info.si_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) err |= copy_from_user(&seta.sig[1], &sf->extramask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) set.sig[0] = seta.sig[0] + (((long)seta.sig[1]) << 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) set_current_blocked(&set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) segv:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) force_sig(SIGSEGV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) struct rt_signal_frame32 __user *sf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) unsigned int psr, pc, npc, ufp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) compat_uptr_t fpu_save;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) compat_uptr_t rwin_save;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) sigset_t set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) int err, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) /* Always make any pending restarted system calls return -EINTR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) current->restart_block.fn = do_no_restart_syscall;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) synchronize_user_stack();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) sf = (struct rt_signal_frame32 __user *) regs->u_regs[UREG_FP];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) /* 1. Make sure we are not getting garbage from the user */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) if (invalid_frame_pointer(sf, sizeof(*sf)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (get_user(ufp, &sf->regs.u_regs[UREG_FP]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) if (ufp & 0x7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (__get_user(pc, &sf->regs.pc) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) __get_user(npc, &sf->regs.npc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) if ((pc | npc) & 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if (test_thread_flag(TIF_32BIT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) pc &= 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) npc &= 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) regs->tpc = pc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) regs->tnpc = npc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) /* 2. Restore the state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) err = __get_user(regs->y, &sf->regs.y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) err |= __get_user(psr, &sf->regs.psr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) for (i = UREG_G1; i <= UREG_I7; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) err |= __get_user(regs->u_regs[i], &sf->regs.u_regs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) err |= __get_user(i, &sf->v8plus.g_upper[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) unsigned long asi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) for (i = UREG_G1; i <= UREG_I7; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) err |= __get_user(asi, &sf->v8plus.asi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) regs->tstate &= ~TSTATE_ASI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) regs->tstate |= ((asi & 0xffUL) << 24UL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) /* User can only change condition codes in %tstate. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) regs->tstate |= psr_to_tstate_icc(psr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /* Prevent syscall restart. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) pt_regs_clear_syscall(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) err |= __get_user(fpu_save, &sf->fpu_save);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (!err && fpu_save)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) err |= restore_fpu_state(regs, compat_ptr(fpu_save));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) err |= get_compat_sigset(&set, &sf->mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) err |= compat_restore_altstack(&sf->stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) err |= __get_user(rwin_save, &sf->rwin_save);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (!err && rwin_save) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (restore_rwin_state(compat_ptr(rwin_save)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) goto segv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) set_current_blocked(&set);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) segv:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) force_sig(SIGSEGV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, unsigned long framesize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) unsigned long sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) sp = regs->u_regs[UREG_FP];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * If we are on the alternate signal stack and would overflow it, don't.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * Return an always-bogus address instead so we will die with SIGSEGV.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) return (void __user *) -1L;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) /* This is the X/Open sanctioned signal stack switching. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) sp = sigsp(sp, ksig) - framesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) /* Always align the stack frame. This handles two cases. First,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) * sigaltstack need not be mindful of platform specific stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * alignment. Second, if we took this signal because the stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * is not aligned properly, we'd like to take the signal cleanly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) * and report that.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) sp &= ~15UL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) return (void __user *) sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) /* The I-cache flush instruction only works in the primary ASI, which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) * right now is the nucleus, aka. kernel space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) * Therefore we have to kick the instructions out using the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) * side linear mapping of the physical address backing the user
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) * instructions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static void flush_signal_insns(unsigned long address)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) unsigned long pstate, paddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) pte_t *ptep, pte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) pgd_t *pgdp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) p4d_t *p4dp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) pud_t *pudp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) pmd_t *pmdp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /* Commit all stores of the instructions we are about to flush. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) /* Disable cross-call reception. In this way even a very wide
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * munmap() on another cpu can't tear down the page table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) * hierarchy from underneath us, since that can't complete
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * until the IPI tlb flush returns.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) __asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) __asm__ __volatile__("wrpr %0, %1, %%pstate"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) : : "r" (pstate), "i" (PSTATE_IE));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) pgdp = pgd_offset(current->mm, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (pgd_none(*pgdp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) goto out_irqs_on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) p4dp = p4d_offset(pgdp, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (p4d_none(*p4dp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) goto out_irqs_on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) pudp = pud_offset(p4dp, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (pud_none(*pudp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) goto out_irqs_on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) pmdp = pmd_offset(pudp, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (pmd_none(*pmdp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) goto out_irqs_on;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) ptep = pte_offset_map(pmdp, address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) pte = *ptep;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (!pte_present(pte))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) goto out_unmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) paddr = (unsigned long) page_address(pte_page(pte));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) __asm__ __volatile__("flush %0 + %1"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) : /* no outputs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) : "r" (paddr),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) "r" (address & (PAGE_SIZE - 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) : "memory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) out_unmap:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) pte_unmap(ptep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) out_irqs_on:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) __asm__ __volatile__("wrpr %0, 0x0, %%pstate" : : "r" (pstate));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) static int setup_frame32(struct ksignal *ksig, struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) sigset_t *oldset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) struct signal_frame32 __user *sf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) int i, err, wsaved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) void __user *tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) int sigframe_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) u32 psr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) compat_sigset_t seta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) /* 1. Make sure everything is clean */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) synchronize_user_stack();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) save_and_clear_fpu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) wsaved = get_thread_wsaved();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) sigframe_size = sizeof(*sf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (current_thread_info()->fpsaved[0] & FPRS_FEF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) sigframe_size += sizeof(__siginfo_fpu_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) if (wsaved)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) sigframe_size += sizeof(__siginfo_rwin_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) sf = (struct signal_frame32 __user *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) get_sigframe(ksig, regs, sigframe_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if (invalid_frame_pointer(sf, sigframe_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) if (show_unhandled_signals)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) pr_info("%s[%d] bad frame in setup_frame32: %08lx TPC %08lx O7 %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) current->comm, current->pid, (unsigned long)sf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) regs->tpc, regs->u_regs[UREG_I7]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) force_sigsegv(ksig->sig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) tail = (sf + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) /* 2. Save the current process state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (test_thread_flag(TIF_32BIT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) regs->tpc &= 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) regs->tnpc &= 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) err = put_user(regs->tpc, &sf->info.si_regs.pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) err |= __put_user(regs->tnpc, &sf->info.si_regs.npc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) err |= __put_user(regs->y, &sf->info.si_regs.y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) psr = tstate_to_psr(regs->tstate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) if (current_thread_info()->fpsaved[0] & FPRS_FEF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) psr |= PSR_EF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) err |= __put_user(psr, &sf->info.si_regs.psr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) for (i = 0; i < 16; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) err |= __put_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) for (i = 1; i < 16; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) err |= __put_user(((u32 *)regs->u_regs)[2*i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) &sf->v8plus.g_upper[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) &sf->v8plus.asi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) if (psr & PSR_EF) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) __siginfo_fpu_t __user *fp = tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) tail += sizeof(*fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) err |= save_fpu_state(regs, fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) err |= __put_user((u64)fp, &sf->fpu_save);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) err |= __put_user(0, &sf->fpu_save);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (wsaved) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) __siginfo_rwin_t __user *rwp = tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) tail += sizeof(*rwp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) err |= save_rwin_state(wsaved, rwp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) err |= __put_user((u64)rwp, &sf->rwin_save);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) set_thread_wsaved(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) err |= __put_user(0, &sf->rwin_save);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) /* If these change we need to know - assignments to seta relies on these sizes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) BUILD_BUG_ON(_NSIG_WORDS != 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) BUILD_BUG_ON(_COMPAT_NSIG_WORDS != 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) seta.sig[1] = (oldset->sig[0] >> 32);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) seta.sig[0] = oldset->sig[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) err |= __put_user(seta.sig[0], &sf->info.si_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) err |= __copy_to_user(sf->extramask, &seta.sig[1],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) if (!wsaved) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) err |= copy_in_user((u32 __user *)sf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) (u32 __user *)(regs->u_regs[UREG_FP]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) sizeof(struct reg_window32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) struct reg_window *rp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) rp = ¤t_thread_info()->reg_window[wsaved - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) for (i = 0; i < 8; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) err |= __put_user(rp->locals[i], &sf->ss.locals[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) for (i = 0; i < 6; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) err |= __put_user(rp->ins[i], &sf->ss.ins[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) err |= __put_user(rp->ins[6], &sf->ss.fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) err |= __put_user(rp->ins[7], &sf->ss.callers_pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) /* 3. signal handler back-trampoline and parameters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) regs->u_regs[UREG_FP] = (unsigned long) sf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) regs->u_regs[UREG_I0] = ksig->sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) regs->u_regs[UREG_I2] = (unsigned long) &sf->info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) /* 4. signal handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) regs->tpc = (unsigned long) ksig->ka.sa.sa_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) regs->tnpc = (regs->tpc + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) if (test_thread_flag(TIF_32BIT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) regs->tpc &= 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) regs->tnpc &= 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) /* 5. return to kernel instructions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (ksig->ka.ka_restorer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) regs->u_regs[UREG_I7] = (unsigned long)ksig->ka.ka_restorer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) unsigned long address = ((unsigned long)&(sf->insns[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) err = __put_user(0x821020d8, &sf->insns[0]); /*mov __NR_sigreturn, %g1*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) flush_signal_insns(address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) static int setup_rt_frame32(struct ksignal *ksig, struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) sigset_t *oldset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) struct rt_signal_frame32 __user *sf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) int i, err, wsaved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) void __user *tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) int sigframe_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) u32 psr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) /* 1. Make sure everything is clean */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) synchronize_user_stack();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) save_and_clear_fpu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) wsaved = get_thread_wsaved();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) sigframe_size = sizeof(*sf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) if (current_thread_info()->fpsaved[0] & FPRS_FEF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) sigframe_size += sizeof(__siginfo_fpu_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) if (wsaved)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) sigframe_size += sizeof(__siginfo_rwin_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) sf = (struct rt_signal_frame32 __user *)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) get_sigframe(ksig, regs, sigframe_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) if (invalid_frame_pointer(sf, sigframe_size)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) if (show_unhandled_signals)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) pr_info("%s[%d] bad frame in setup_rt_frame32: %08lx TPC %08lx O7 %08lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) current->comm, current->pid, (unsigned long)sf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) regs->tpc, regs->u_regs[UREG_I7]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) force_sigsegv(ksig->sig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) tail = (sf + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) /* 2. Save the current process state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) if (test_thread_flag(TIF_32BIT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) regs->tpc &= 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) regs->tnpc &= 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) err = put_user(regs->tpc, &sf->regs.pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) err |= __put_user(regs->tnpc, &sf->regs.npc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) err |= __put_user(regs->y, &sf->regs.y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) psr = tstate_to_psr(regs->tstate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) if (current_thread_info()->fpsaved[0] & FPRS_FEF)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) psr |= PSR_EF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) err |= __put_user(psr, &sf->regs.psr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) for (i = 0; i < 16; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) err |= __put_user(regs->u_regs[i], &sf->regs.u_regs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) for (i = 1; i < 16; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) err |= __put_user(((u32 *)regs->u_regs)[2*i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) &sf->v8plus.g_upper[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) &sf->v8plus.asi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) if (psr & PSR_EF) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) __siginfo_fpu_t __user *fp = tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) tail += sizeof(*fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) err |= save_fpu_state(regs, fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) err |= __put_user((u64)fp, &sf->fpu_save);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) err |= __put_user(0, &sf->fpu_save);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) if (wsaved) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) __siginfo_rwin_t __user *rwp = tail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) tail += sizeof(*rwp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) err |= save_rwin_state(wsaved, rwp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) err |= __put_user((u64)rwp, &sf->rwin_save);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) set_thread_wsaved(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) err |= __put_user(0, &sf->rwin_save);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) /* Update the siginfo structure. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) err |= copy_siginfo_to_user32(&sf->info, &ksig->info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) /* Setup sigaltstack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) err |= __compat_save_altstack(&sf->stack, regs->u_regs[UREG_FP]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) err |= put_compat_sigset(&sf->mask, oldset, sizeof(compat_sigset_t));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) if (!wsaved) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) err |= copy_in_user((u32 __user *)sf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) (u32 __user *)(regs->u_regs[UREG_FP]),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) sizeof(struct reg_window32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) struct reg_window *rp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) rp = ¤t_thread_info()->reg_window[wsaved - 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) for (i = 0; i < 8; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) err |= __put_user(rp->locals[i], &sf->ss.locals[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) for (i = 0; i < 6; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) err |= __put_user(rp->ins[i], &sf->ss.ins[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) err |= __put_user(rp->ins[6], &sf->ss.fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) err |= __put_user(rp->ins[7], &sf->ss.callers_pc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) /* 3. signal handler back-trampoline and parameters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) regs->u_regs[UREG_FP] = (unsigned long) sf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) regs->u_regs[UREG_I0] = ksig->sig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) regs->u_regs[UREG_I1] = (unsigned long) &sf->info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) regs->u_regs[UREG_I2] = (unsigned long) &sf->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) /* 4. signal handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) regs->tpc = (unsigned long) ksig->ka.sa.sa_handler;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) regs->tnpc = (regs->tpc + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) if (test_thread_flag(TIF_32BIT)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) regs->tpc &= 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) regs->tnpc &= 0xffffffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) /* 5. return to kernel instructions */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) if (ksig->ka.ka_restorer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) regs->u_regs[UREG_I7] = (unsigned long)ksig->ka.ka_restorer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) unsigned long address = ((unsigned long)&(sf->insns[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) /* mov __NR_rt_sigreturn, %g1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) err |= __put_user(0x82102065, &sf->insns[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) /* t 0x10 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) err |= __put_user(0x91d02010, &sf->insns[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) flush_signal_insns(address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) static inline void handle_signal32(struct ksignal *ksig,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) sigset_t *oldset = sigmask_to_save();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) if (ksig->ka.sa.sa_flags & SA_SIGINFO)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) err = setup_rt_frame32(ksig, regs, oldset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) err = setup_frame32(ksig, regs, oldset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) signal_setup_done(err, ksig, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) struct sigaction *sa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) switch (regs->u_regs[UREG_I0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) case ERESTART_RESTARTBLOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) case ERESTARTNOHAND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) no_system_call_restart:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) regs->u_regs[UREG_I0] = EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) regs->tstate |= TSTATE_ICARRY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) case ERESTARTSYS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) if (!(sa->sa_flags & SA_RESTART))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) goto no_system_call_restart;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) case ERESTARTNOINTR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) regs->u_regs[UREG_I0] = orig_i0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) regs->tpc -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) regs->tnpc -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) /* Note that 'init' is a special process: it doesn't get signals it doesn't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) * want to handle. Thus you cannot kill init even with a SIGKILL even by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) * mistake.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) void do_signal32(struct pt_regs * regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) struct ksignal ksig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) unsigned long orig_i0 = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) int restart_syscall = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) bool has_handler = get_signal(&ksig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) if (pt_regs_is_syscall(regs) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) (regs->tstate & (TSTATE_XCARRY | TSTATE_ICARRY))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) restart_syscall = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) orig_i0 = regs->u_regs[UREG_G6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (has_handler) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) if (restart_syscall)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) syscall_restart32(orig_i0, regs, &ksig.ka.sa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) handle_signal32(&ksig, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (restart_syscall) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) switch (regs->u_regs[UREG_I0]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) case ERESTARTNOHAND:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) case ERESTARTSYS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) case ERESTARTNOINTR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) /* replay the system call when we are done */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) regs->u_regs[UREG_I0] = orig_i0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) regs->tpc -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) regs->tnpc -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) pt_regs_clear_syscall(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) case ERESTART_RESTARTBLOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) regs->u_regs[UREG_G1] = __NR_restart_syscall;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) regs->tpc -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) regs->tnpc -= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) pt_regs_clear_syscall(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) restore_saved_sigmask();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) struct sigstack32 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) u32 the_stack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) int cur_status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) asmlinkage int do_sys32_sigstack(u32 u_ssptr, u32 u_ossptr, unsigned long sp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) struct sigstack32 __user *ssptr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) (struct sigstack32 __user *)((unsigned long)(u_ssptr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) struct sigstack32 __user *ossptr =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) (struct sigstack32 __user *)((unsigned long)(u_ossptr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) int ret = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) /* First see if old state is wanted. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) if (ossptr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) if (put_user(current->sas_ss_sp + current->sas_ss_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) &ossptr->the_stack) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) __put_user(on_sig_stack(sp), &ossptr->cur_status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) /* Now see if we want to update the new state. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) if (ssptr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) u32 ss_sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) if (get_user(ss_sp, &ssptr->the_stack))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) /* If the current stack was set with sigaltstack, don't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) * swap stacks while we are on it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) ret = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) if (current->sas_ss_sp && on_sig_stack(sp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) /* Since we don't know the extent of the stack, and we don't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) * track onstack-ness, but rather calculate it, we must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) * presume a size. Ho hum this interface is lossy.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) current->sas_ss_size = SIGSTKSZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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