diff options
Diffstat (limited to 'arch/arc/kernel/ptrace.c')
| -rw-r--r-- | arch/arc/kernel/ptrace.c | 147 |
1 files changed, 139 insertions, 8 deletions
diff --git a/arch/arc/kernel/ptrace.c b/arch/arc/kernel/ptrace.c index 883391977fdf..cad5367b7c37 100644 --- a/arch/arc/kernel/ptrace.c +++ b/arch/arc/kernel/ptrace.c @@ -4,12 +4,95 @@ */ #include <linux/ptrace.h> -#include <linux/tracehook.h> #include <linux/sched/task_stack.h> #include <linux/regset.h> #include <linux/unistd.h> #include <linux/elf.h> +#define CREATE_TRACE_POINTS +#include <trace/events/syscalls.h> + +struct pt_regs_offset { + const char *name; + int offset; +}; + +#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)} +#define REG_OFFSET_END {.name = NULL, .offset = 0} + +#ifdef CONFIG_ISA_ARCOMPACT +static const struct pt_regs_offset regoffset_table[] = { + REG_OFFSET_NAME(bta), + REG_OFFSET_NAME(lp_start), + REG_OFFSET_NAME(lp_end), + REG_OFFSET_NAME(lp_count), + REG_OFFSET_NAME(status32), + REG_OFFSET_NAME(ret), + REG_OFFSET_NAME(blink), + REG_OFFSET_NAME(fp), + REG_OFFSET_NAME(r26), + REG_OFFSET_NAME(r12), + REG_OFFSET_NAME(r11), + REG_OFFSET_NAME(r10), + REG_OFFSET_NAME(r9), + REG_OFFSET_NAME(r8), + REG_OFFSET_NAME(r7), + REG_OFFSET_NAME(r6), + REG_OFFSET_NAME(r5), + REG_OFFSET_NAME(r4), + REG_OFFSET_NAME(r3), + REG_OFFSET_NAME(r2), + REG_OFFSET_NAME(r1), + REG_OFFSET_NAME(r0), + REG_OFFSET_NAME(sp), + REG_OFFSET_NAME(orig_r0), + REG_OFFSET_NAME(ecr), + REG_OFFSET_END, +}; + +#else + +static const struct pt_regs_offset regoffset_table[] = { + REG_OFFSET_NAME(orig_r0), + REG_OFFSET_NAME(ecr), + REG_OFFSET_NAME(bta), + REG_OFFSET_NAME(r26), + REG_OFFSET_NAME(fp), + REG_OFFSET_NAME(sp), + REG_OFFSET_NAME(r12), + REG_OFFSET_NAME(r30), +#ifdef CONFIG_ARC_HAS_ACCL_REGS + REG_OFFSET_NAME(r58), + REG_OFFSET_NAME(r59), +#endif +#ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS + REG_OFFSET_NAME(DSP_CTRL), +#endif + REG_OFFSET_NAME(r0), + REG_OFFSET_NAME(r1), + REG_OFFSET_NAME(r2), + REG_OFFSET_NAME(r3), + REG_OFFSET_NAME(r4), + REG_OFFSET_NAME(r5), + REG_OFFSET_NAME(r6), + REG_OFFSET_NAME(r7), + REG_OFFSET_NAME(r8), + REG_OFFSET_NAME(r9), + REG_OFFSET_NAME(r10), + REG_OFFSET_NAME(r11), + REG_OFFSET_NAME(blink), + REG_OFFSET_NAME(lp_end), + REG_OFFSET_NAME(lp_start), + REG_OFFSET_NAME(lp_count), + REG_OFFSET_NAME(ei), + REG_OFFSET_NAME(ldi), + REG_OFFSET_NAME(jli), + REG_OFFSET_NAME(ret), + REG_OFFSET_NAME(status32), + REG_OFFSET_END, +}; +#endif + static struct callee_regs *task_callee_regs(struct task_struct *tsk) { struct callee_regs *tmp = (struct callee_regs *)tsk->thread.callee_reg; @@ -100,7 +183,7 @@ static int genregs_set(struct task_struct *target, #define REG_IGNORE_ONE(LOC) \ if (!ret) \ - ret = user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \ + user_regset_copyin_ignore(&pos, &count, &kbuf, &ubuf, \ offsetof(struct user_regs_struct, LOC), \ offsetof(struct user_regs_struct, LOC) + 4); @@ -201,7 +284,7 @@ enum arc_getset { static const struct user_regset arc_regsets[] = { [REGSET_CMN] = { - .core_note_type = NT_PRSTATUS, + USER_REGSET_NOTE_TYPE(PRSTATUS), .n = ELF_NGREG, .size = sizeof(unsigned long), .align = sizeof(unsigned long), @@ -210,7 +293,7 @@ static const struct user_regset arc_regsets[] = { }, #ifdef CONFIG_ISA_ARCV2 [REGSET_ARCV2] = { - .core_note_type = NT_ARC_V2, + USER_REGSET_NOTE_TYPE(ARC_V2), .n = ELF_ARCV2REG, .size = sizeof(unsigned long), .align = sizeof(unsigned long), @@ -256,15 +339,63 @@ long arch_ptrace(struct task_struct *child, long request, return ret; } -asmlinkage int syscall_trace_entry(struct pt_regs *regs) +asmlinkage int syscall_trace_enter(struct pt_regs *regs) { - if (tracehook_report_syscall_entry(regs)) - return ULONG_MAX; + if (test_thread_flag(TIF_SYSCALL_TRACE)) + if (ptrace_report_syscall_entry(regs)) + return ULONG_MAX; + +#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_enter(regs, syscall_get_nr(current, regs)); +#endif return regs->r8; } asmlinkage void syscall_trace_exit(struct pt_regs *regs) { - tracehook_report_syscall_exit(regs, 0); + if (test_thread_flag(TIF_SYSCALL_TRACE)) + ptrace_report_syscall_exit(regs, 0); + +#ifdef CONFIG_HAVE_SYSCALL_TRACEPOINTS + if (test_thread_flag(TIF_SYSCALL_TRACEPOINT)) + trace_sys_exit(regs, regs_return_value(regs)); +#endif +} + +int regs_query_register_offset(const char *name) +{ + const struct pt_regs_offset *roff; + + for (roff = regoffset_table; roff->name != NULL; roff++) + if (!strcmp(roff->name, name)) + return roff->offset; + return -EINVAL; +} + +const char *regs_query_register_name(unsigned int offset) +{ + const struct pt_regs_offset *roff; + for (roff = regoffset_table; roff->name != NULL; roff++) + if (roff->offset == offset) + return roff->name; + return NULL; +} + +bool regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr) +{ + return (addr & ~(THREAD_SIZE - 1)) == + (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)); +} + +unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, unsigned int n) +{ + unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs); + + addr += n; + if (regs_within_kernel_stack(regs, (unsigned long)addr)) + return *addr; + else + return 0; } |