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Diffstat (limited to 'arch/sh/include/asm/ptrace.h')
-rw-r--r-- | arch/sh/include/asm/ptrace.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/arch/sh/include/asm/ptrace.h b/arch/sh/include/asm/ptrace.h new file mode 100644 index 000000000..9143c7bab --- /dev/null +++ b/arch/sh/include/asm/ptrace.h @@ -0,0 +1,118 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 1999, 2000 Niibe Yutaka + */ +#ifndef __ASM_SH_PTRACE_H +#define __ASM_SH_PTRACE_H + + +#include <linux/stringify.h> +#include <linux/stddef.h> +#include <linux/thread_info.h> +#include <asm/addrspace.h> +#include <asm/page.h> +#include <uapi/asm/ptrace.h> + +#define user_mode(regs) (((regs)->sr & 0x40000000)==0) +#define kernel_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15]) + +#define GET_FP(regs) ((regs)->regs[14]) +#define GET_USP(regs) ((regs)->regs[15]) + +#define arch_has_single_step() (1) + +/* + * kprobe-based event tracer support + */ +struct pt_regs_offset { + const char *name; + int offset; +}; + +#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, + struct perf_sample_data *data, struct pt_regs *regs); + +#define task_pt_regs(task) \ + ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1) + +static inline unsigned long profile_pc(struct pt_regs *regs) +{ + unsigned long pc = regs->pc; + + if (virt_addr_uncached(pc)) + return CAC_ADDR(pc); + + return pc; +} +#define profile_pc profile_pc + +#include <asm-generic/ptrace.h> +#endif /* __ASM_SH_PTRACE_H */ |