diff options
Diffstat (limited to 'arch/arm64/kernel/ptrace.c')
| -rw-r--r-- | arch/arm64/kernel/ptrace.c | 52 |
1 files changed, 37 insertions, 15 deletions
diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index d882b833dbdb..2d4d67af1d38 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -37,6 +37,7 @@ #include <linux/regset.h> #include <linux/tracehook.h> #include <linux/elf.h> +#include <linux/errno.h> #include <asm/compat.h> #include <asm/debug-monitors.h> @@ -76,10 +77,10 @@ static void ptrace_hbptriggered(struct perf_event *bp, .si_addr = (void __user *)(bkpt->trigger), }; -#ifdef CONFIG_COMPAT +#ifdef CONFIG_AARCH32_EL0 int i; - if (!is_compat_task()) + if (!is_a32_compat_task()) goto send_sig; for (i = 0; i < ARM_MAX_BRP; ++i) { @@ -653,6 +654,7 @@ static const struct user_regset_view user_aarch64_view = { #ifdef CONFIG_COMPAT #include <linux/compat.h> +#ifdef CONFIG_AARCH32_EL0 enum compat_regset { REGSET_COMPAT_GPR, @@ -829,9 +831,9 @@ static int compat_vfp_set(struct task_struct *target, static const struct user_regset aarch32_regsets[] = { [REGSET_COMPAT_GPR] = { .core_note_type = NT_PRSTATUS, - .n = COMPAT_ELF_NGREG, - .size = sizeof(compat_elf_greg_t), - .align = sizeof(compat_elf_greg_t), + .n = COMPAT_A32_ELF_NGREG, + .size = sizeof(compat_a32_elf_greg_t), + .align = sizeof(compat_a32_elf_greg_t), .get = compat_gpr_get, .set = compat_gpr_set }, @@ -864,7 +866,7 @@ static int compat_ptrace_read_user(struct task_struct *tsk, compat_ulong_t off, tmp = tsk->mm->start_data; else if (off == COMPAT_PT_TEXT_END_ADDR) tmp = tsk->mm->end_code; - else if (off < sizeof(compat_elf_gregset_t)) + else if (off < sizeof(compat_a32_elf_gregset_t)) return copy_regset_to_user(tsk, &user_aarch32_view, REGSET_COMPAT_GPR, off, sizeof(compat_ulong_t), ret); @@ -885,7 +887,7 @@ static int compat_ptrace_write_user(struct task_struct *tsk, compat_ulong_t off, if (off & 3 || off >= COMPAT_USER_SZ) return -EIO; - if (off >= sizeof(compat_elf_gregset_t)) + if (off >= sizeof(compat_a32_elf_gregset_t)) return 0; set_fs(KERNEL_DS); @@ -1027,8 +1029,8 @@ static int compat_ptrace_sethbpregs(struct task_struct *tsk, compat_long_t num, } #endif /* CONFIG_HAVE_HW_BREAKPOINT */ -long compat_arch_ptrace(struct task_struct *child, compat_long_t request, - compat_ulong_t caddr, compat_ulong_t cdata) +long compat_a32_arch_ptrace(struct task_struct *child, compat_long_t request, + compat_ulong_t caddr, compat_ulong_t cdata) { unsigned long addr = caddr; unsigned long data = cdata; @@ -1048,7 +1050,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, ret = copy_regset_to_user(child, &user_aarch32_view, REGSET_COMPAT_GPR, - 0, sizeof(compat_elf_gregset_t), + 0, sizeof(compat_a32_elf_gregset_t), datap); break; @@ -1056,7 +1058,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, ret = copy_regset_from_user(child, &user_aarch32_view, REGSET_COMPAT_GPR, - 0, sizeof(compat_elf_gregset_t), + 0, sizeof(compat_a32_elf_gregset_t), datap); break; @@ -1104,12 +1106,32 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request, return ret; } -#endif /* CONFIG_COMPAT */ +#else /* !CONFIG_AARCH32_EL0 */ +long compat_a32_arch_ptrace(struct task_struct *child, compat_long_t request, + compat_ulong_t caddr, compat_ulong_t cdata) +{ + return -EINVAL; +} +#endif /* !CONFIG_AARCH32_EL0 */ + +/* + * In ILP32, compat_arch_ptrace is used via the compat syscall, we don't need + * to do anything special for ILP32 though; only for AARCH32. + */ +long compat_arch_ptrace(struct task_struct *child, compat_long_t request, + compat_ulong_t caddr, compat_ulong_t cdata) +{ + if (is_a32_compat_task()) + return compat_a32_arch_ptrace(child, request, caddr, cdata); + return compat_ptrace_request(child, request, caddr, cdata); +} +#endif + const struct user_regset_view *task_user_regset_view(struct task_struct *task) { -#ifdef CONFIG_COMPAT - if (is_compat_thread(task_thread_info(task))) +#ifdef CONFIG_AARCH32_EL0 + if (is_a32_compat_thread(task_thread_info(task))) return &user_aarch32_view; #endif return &user_aarch64_view; @@ -1136,7 +1158,7 @@ static void tracehook_report_syscall(struct pt_regs *regs, * A scratch register (ip(r12) on AArch32, x7 on AArch64) is * used to denote syscall entry/exit: */ - regno = (is_compat_task() ? 12 : 7); + regno = (is_a32_compat_task() ? 12 : 7); saved_reg = regs->regs[regno]; regs->regs[regno] = dir; |