^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright 2010 Tilera Corporation. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright 2015 Regents of the University of California
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2017 SiFive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copied from arch/tile/kernel/ptrace.c
^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 <asm/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/syscall.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/thread_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/switch_to.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/audit.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/regset.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/sched/task_stack.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/tracehook.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define CREATE_TRACE_POINTS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <trace/events/syscalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) enum riscv_regset {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) REGSET_X,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #ifdef CONFIG_FPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) REGSET_F,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static int riscv_gpr_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) return membuf_write(&to, task_pt_regs(target),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) sizeof(struct user_regs_struct));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static int riscv_gpr_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct pt_regs *regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) regs = task_pt_regs(target);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, regs, 0, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #ifdef CONFIG_FPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static int riscv_fpr_get(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct membuf to)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct __riscv_d_ext_state *fstate = &target->thread.fstate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (target == current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) fstate_save(current, task_pt_regs(current));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) membuf_write(&to, fstate, offsetof(struct __riscv_d_ext_state, fcsr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) membuf_store(&to, fstate->fcsr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return membuf_zero(&to, 4); // explicitly pad
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static int riscv_fpr_set(struct task_struct *target,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) const struct user_regset *regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) unsigned int pos, unsigned int count,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) const void *kbuf, const void __user *ubuf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct __riscv_d_ext_state *fstate = &target->thread.fstate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, fstate, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) offsetof(struct __riscv_d_ext_state, fcsr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (!ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, fstate, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) offsetof(struct __riscv_d_ext_state, fcsr) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) sizeof(fstate->fcsr));
^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) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static const struct user_regset riscv_user_regset[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) [REGSET_X] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .core_note_type = NT_PRSTATUS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .n = ELF_NGREG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .size = sizeof(elf_greg_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .align = sizeof(elf_greg_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .regset_get = riscv_gpr_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .set = riscv_gpr_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #ifdef CONFIG_FPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) [REGSET_F] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .core_note_type = NT_PRFPREG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .n = ELF_NFPREG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .size = sizeof(elf_fpreg_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) .align = sizeof(elf_fpreg_t),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .regset_get = riscv_fpr_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .set = riscv_fpr_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static const struct user_regset_view riscv_user_native_view = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .name = "riscv",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .e_machine = EM_RISCV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .regsets = riscv_user_regset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .n = ARRAY_SIZE(riscv_user_regset),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) const struct user_regset_view *task_user_regset_view(struct task_struct *task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return &riscv_user_native_view;
^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 ptrace_disable(struct task_struct *child)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) long arch_ptrace(struct task_struct *child, long request,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) unsigned long addr, unsigned long data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) long ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) switch (request) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ret = ptrace_request(child, request, addr, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * Allows PTRACE_SYSCALL to work. These are called from entry.S in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * {handle,ret_from}_syscall.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) __visible int do_syscall_trace_enter(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) if (test_thread_flag(TIF_SYSCALL_TRACE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (tracehook_report_syscall_entry(regs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * Do the secure computing after ptrace; failures should be fast.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * If this fails we might have return value in a0 from seccomp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * (via SECCOMP_RET_ERRNO/TRACE).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (secure_computing() == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) #ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) trace_sys_enter(regs, syscall_get_nr(current, regs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) audit_syscall_entry(regs->a7, regs->a0, regs->a1, regs->a2, regs->a3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) __visible void do_syscall_trace_exit(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) audit_syscall_exit(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (test_thread_flag(TIF_SYSCALL_TRACE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) tracehook_report_syscall_exit(regs, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) #ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (test_thread_flag(TIF_SYSCALL_TRACEPOINT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) trace_sys_exit(regs, regs_return_value(regs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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