diff options
Diffstat (limited to 'arch/sh/include/asm/ptrace.h')
| -rw-r--r-- | arch/sh/include/asm/ptrace.h | 191 |
1 files changed, 96 insertions, 95 deletions
diff --git a/arch/sh/include/asm/ptrace.h b/arch/sh/include/asm/ptrace.h index 1dc12cb44a2..de167d3a1a8 100644 --- a/arch/sh/include/asm/ptrace.h +++ b/arch/sh/include/asm/ptrace.h @@ -3,90 +3,7 @@ /* * Copyright (C) 1999, 2000 Niibe Yutaka - * - */ -#if defined(__SH5__) -struct pt_regs { - unsigned long long pc; - unsigned long long sr; - long long syscall_nr; - unsigned long long regs[63]; - unsigned long long tregs[8]; - unsigned long long pad[2]; -}; -#else -/* - * GCC defines register number like this: - * ----------------------------- - * 0 - 15 are integer registers - * 17 - 22 are control/special registers - * 24 - 39 fp registers - * 40 - 47 xd registers - * 48 - fpscr register - * ----------------------------- - * - * We follows above, except: - * 16 --- program counter (PC) - * 22 --- syscall # - * 23 --- floating point communication register - */ -#define REG_REG0 0 -#define REG_REG15 15 - -#define REG_PC 16 - -#define REG_PR 17 -#define REG_SR 18 -#define REG_GBR 19 -#define REG_MACH 20 -#define REG_MACL 21 - -#define REG_SYSCALL 22 - -#define REG_FPREG0 23 -#define REG_FPREG15 38 -#define REG_XFREG0 39 -#define REG_XFREG15 54 - -#define REG_FPSCR 55 -#define REG_FPUL 56 - -/* - * This struct defines the way the registers are stored on the - * kernel stack during a system call or other kernel entry. - */ -struct pt_regs { - unsigned long regs[16]; - unsigned long pc; - unsigned long pr; - unsigned long sr; - unsigned long gbr; - unsigned long mach; - unsigned long macl; - long tra; -}; - -/* - * This struct defines the way the DSP registers are stored on the - * kernel stack during a system call or other kernel entry. */ -struct pt_dspregs { - unsigned long a1; - unsigned long a0g; - unsigned long a1g; - unsigned long m0; - unsigned long m1; - unsigned long a0; - unsigned long x0; - unsigned long x1; - unsigned long y0; - unsigned long y1; - unsigned long dsr; - unsigned long rs; - unsigned long re; - unsigned long mod; -}; -#endif #define PTRACE_GETREGS 12 /* General registers */ #define PTRACE_SETREGS 13 @@ -102,27 +19,113 @@ struct pt_dspregs { #define PTRACE_GETDSPREGS 55 /* DSP registers */ #define PTRACE_SETDSPREGS 56 -#define PT_TEXT_END_ADDR 240 -#define PT_TEXT_ADDR 244 /* &(struct user)->start_code */ -#define PT_DATA_ADDR 248 /* &(struct user)->start_data */ +#define PT_TEXT_END_ADDR 240 +#define PT_TEXT_ADDR 244 /* &(struct user)->start_code */ +#define PT_DATA_ADDR 248 /* &(struct user)->start_data */ #define PT_TEXT_LEN 252 +#if defined(__SH5__) || defined(CONFIG_CPU_SH5) +#include "ptrace_64.h" +#else +#include "ptrace_32.h" +#endif + #ifdef __KERNEL__ + +#include <linux/stringify.h> +#include <linux/stddef.h> +#include <linux/thread_info.h> #include <asm/addrspace.h> +#include <asm/page.h> +#include <asm/system.h> #define user_mode(regs) (((regs)->sr & 0x40000000)==0) +#define user_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15]) +#define kernel_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15]) #define instruction_pointer(regs) ((unsigned long)(regs)->pc) extern void show_regs(struct pt_regs *); +#define arch_has_single_step() (1) + /* - * These are defined as per linux/ptrace.h. + * kprobe-based event tracer support */ -struct task_struct; +struct pt_regs_offset { + const char *name; + int offset; +}; -#define arch_has_single_step() (1) -extern void user_enable_single_step(struct task_struct *); -extern void user_disable_single_step(struct task_struct *); +#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)} +#define REGS_OFFSET_NAME(num) \ + {.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])} +#define TREGS_OFFSET_NAME(num) \ + {.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])} +#define REG_OFFSET_END {.name = NULL, .offset = 0} + +/* Query offset/name of register from its name/offset */ +extern int regs_query_register_offset(const char *name); +extern const char *regs_query_register_name(unsigned int offset); + +extern const struct pt_regs_offset regoffset_table[]; + +/** + * regs_get_register() - get register value from its offset + * @regs: pt_regs from which register value is gotten. + * @offset: offset number of the register. + * + * regs_get_register returns the value of a register. The @offset is the + * offset of the register in struct pt_regs address which specified by @regs. + * If @offset is bigger than MAX_REG_OFFSET, this returns 0. + */ +static inline unsigned long regs_get_register(struct pt_regs *regs, + unsigned int offset) +{ + if (unlikely(offset > MAX_REG_OFFSET)) + return 0; + return *(unsigned long *)((unsigned long)regs + offset); +} + +/** + * 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 inline int 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. + */ +static inline 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; +} + +struct perf_event; +struct perf_sample_data; + +extern void ptrace_triggered(struct perf_event *bp, int nmi, + struct perf_sample_data *data, struct pt_regs *regs); #define task_pt_regs(task) \ ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1) @@ -131,10 +134,8 @@ static inline unsigned long profile_pc(struct pt_regs *regs) { unsigned long pc = instruction_pointer(regs); -#ifdef P2SEG - if (pc >= P2SEG && pc < P3SEG) - pc -= 0x20000000; -#endif + if (virt_addr_uncached(pc)) + return CAC_ADDR(pc); return pc; } |