diff options
Diffstat (limited to 'arch/openrisc/kernel/ptrace.c')
| -rw-r--r-- | arch/openrisc/kernel/ptrace.c | 122 |
1 files changed, 111 insertions, 11 deletions
diff --git a/arch/openrisc/kernel/ptrace.c b/arch/openrisc/kernel/ptrace.c index 0b7d2ca6ba3b..552489b24855 100644 --- a/arch/openrisc/kernel/ptrace.c +++ b/arch/openrisc/kernel/ptrace.c @@ -27,6 +27,10 @@ #include <asm/thread_info.h> #include <asm/page.h> +asmlinkage long do_syscall_trace_enter(struct pt_regs *regs); + +asmlinkage void do_syscall_trace_leave(struct pt_regs *regs); + /* * Copy the thread state to a regset that can be interpreted by userspace. * @@ -84,6 +88,7 @@ static int genregs_set(struct task_struct *target, return ret; } +#ifdef CONFIG_FPU /* * As OpenRISC shares GPRs and floating point registers we don't need to export * the floating point registers again. So here we only export the fpcsr special @@ -93,9 +98,7 @@ static int fpregs_get(struct task_struct *target, const struct user_regset *regset, struct membuf to) { - const struct pt_regs *regs = task_pt_regs(target); - - return membuf_store(&to, regs->fpcsr); + return membuf_store(&to, target->thread.fpcsr); } static int fpregs_set(struct task_struct *target, @@ -103,40 +106,41 @@ static int fpregs_set(struct task_struct *target, unsigned int pos, unsigned int count, const void *kbuf, const void __user *ubuf) { - struct pt_regs *regs = task_pt_regs(target); - int ret; - /* FPCSR */ - ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, - ®s->fpcsr, 0, 4); - return ret; + return user_regset_copyin(&pos, &count, &kbuf, &ubuf, + &target->thread.fpcsr, 0, 4); } +#endif /* * Define the register sets available on OpenRISC under Linux */ enum or1k_regset { REGSET_GENERAL, +#ifdef CONFIG_FPU REGSET_FPU, +#endif }; static const struct user_regset or1k_regsets[] = { [REGSET_GENERAL] = { - .core_note_type = NT_PRSTATUS, + USER_REGSET_NOTE_TYPE(PRSTATUS), .n = ELF_NGREG, .size = sizeof(long), .align = sizeof(long), .regset_get = genregs_get, .set = genregs_set, }, +#ifdef CONFIG_FPU [REGSET_FPU] = { - .core_note_type = NT_PRFPREG, + USER_REGSET_NOTE_TYPE(PRFPREG), .n = sizeof(struct __or1k_fpu_state) / sizeof(long), .size = sizeof(long), .align = sizeof(long), .regset_get = fpregs_get, .set = fpregs_set, }, +#endif }; static const struct user_regset_view user_or1k_native_view = { @@ -156,6 +160,102 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task) * in exit.c or in signal.c. */ +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} + +static const struct pt_regs_offset regoffset_table[] = { + REG_OFFSET_NAME(sr), + REG_OFFSET_NAME(sp), + REG_OFFSET_NAME(gpr2), + REG_OFFSET_NAME(gpr3), + REG_OFFSET_NAME(gpr4), + REG_OFFSET_NAME(gpr5), + REG_OFFSET_NAME(gpr6), + REG_OFFSET_NAME(gpr7), + REG_OFFSET_NAME(gpr8), + REG_OFFSET_NAME(gpr9), + REG_OFFSET_NAME(gpr10), + REG_OFFSET_NAME(gpr11), + REG_OFFSET_NAME(gpr12), + REG_OFFSET_NAME(gpr13), + REG_OFFSET_NAME(gpr14), + REG_OFFSET_NAME(gpr15), + REG_OFFSET_NAME(gpr16), + REG_OFFSET_NAME(gpr17), + REG_OFFSET_NAME(gpr18), + REG_OFFSET_NAME(gpr19), + REG_OFFSET_NAME(gpr20), + REG_OFFSET_NAME(gpr21), + REG_OFFSET_NAME(gpr22), + REG_OFFSET_NAME(gpr23), + REG_OFFSET_NAME(gpr24), + REG_OFFSET_NAME(gpr25), + REG_OFFSET_NAME(gpr26), + REG_OFFSET_NAME(gpr27), + REG_OFFSET_NAME(gpr28), + REG_OFFSET_NAME(gpr29), + REG_OFFSET_NAME(gpr30), + REG_OFFSET_NAME(gpr31), + REG_OFFSET_NAME(pc), + REG_OFFSET_NAME(orig_gpr11), + REG_OFFSET_END, +}; + +/** + * regs_query_register_offset() - query register offset from its name + * @name: the name of a register + * + * regs_query_register_offset() returns the offset of a register in struct + * pt_regs from its name. If the name is invalid, this returns -EINVAL; + */ +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; +} + +/** + * regs_within_kernel_stack() - check the address in the stack + * @regs: pt_regs which contains kernel stack pointer. + * @addr: address which is checked. + * + * regs_within_kernel_stack() checks @addr is within the kernel stack page(s). + * If @addr is within the kernel stack, it returns true. If not, returns false. + */ +static bool regs_within_kernel_stack(struct pt_regs *regs, unsigned long addr) +{ + return (addr & ~(THREAD_SIZE - 1)) == + (kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1)); +} + +/** + * regs_get_kernel_stack_nth() - get Nth entry of the stack + * @regs: pt_regs which contains kernel stack pointer. + * @n: stack entry number. + * + * regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which + * is specified by @regs. If the @n th entry is NOT in the kernel stack, + * this returns 0. + */ +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; +} /* * Called by kernel/ptrace.c when detaching.. |