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139 lines
3.7 KiB
139 lines
3.7 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 1999, 2000 Niibe Yutaka |
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*/ |
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#ifndef __ASM_SH_PTRACE_H |
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#define __ASM_SH_PTRACE_H |
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#include <linux/stringify.h> |
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#include <linux/stddef.h> |
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#include <linux/thread_info.h> |
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#include <asm/addrspace.h> |
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#include <asm/page.h> |
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#include <uapi/asm/ptrace.h> |
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#define user_mode(regs) (((regs)->sr & 0x40000000)==0) |
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#define kernel_stack_pointer(_regs) ((unsigned long)(_regs)->regs[15]) |
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static inline unsigned long instruction_pointer(struct pt_regs *regs) |
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{ |
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return regs->pc; |
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} |
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static inline void instruction_pointer_set(struct pt_regs *regs, |
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unsigned long val) |
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{ |
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regs->pc = val; |
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} |
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static inline unsigned long frame_pointer(struct pt_regs *regs) |
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{ |
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return regs->regs[14]; |
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} |
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static inline unsigned long user_stack_pointer(struct pt_regs *regs) |
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{ |
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return regs->regs[15]; |
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} |
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static inline void user_stack_pointer_set(struct pt_regs *regs, |
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unsigned long val) |
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{ |
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regs->regs[15] = val; |
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} |
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#define arch_has_single_step() (1) |
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/* |
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* kprobe-based event tracer support |
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*/ |
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struct pt_regs_offset { |
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const char *name; |
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int offset; |
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}; |
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#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)} |
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#define REGS_OFFSET_NAME(num) \ |
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{.name = __stringify(r##num), .offset = offsetof(struct pt_regs, regs[num])} |
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#define TREGS_OFFSET_NAME(num) \ |
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{.name = __stringify(tr##num), .offset = offsetof(struct pt_regs, tregs[num])} |
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#define REG_OFFSET_END {.name = NULL, .offset = 0} |
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/* Query offset/name of register from its name/offset */ |
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extern int regs_query_register_offset(const char *name); |
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extern const char *regs_query_register_name(unsigned int offset); |
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extern const struct pt_regs_offset regoffset_table[]; |
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/** |
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* regs_get_register() - get register value from its offset |
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* @regs: pt_regs from which register value is gotten. |
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* @offset: offset number of the register. |
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* |
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* regs_get_register returns the value of a register. The @offset is the |
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* offset of the register in struct pt_regs address which specified by @regs. |
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* If @offset is bigger than MAX_REG_OFFSET, this returns 0. |
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*/ |
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static inline unsigned long regs_get_register(struct pt_regs *regs, |
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unsigned int offset) |
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{ |
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if (unlikely(offset > MAX_REG_OFFSET)) |
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return 0; |
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return *(unsigned long *)((unsigned long)regs + offset); |
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} |
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/** |
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* regs_within_kernel_stack() - check the address in the stack |
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* @regs: pt_regs which contains kernel stack pointer. |
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* @addr: address which is checked. |
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* |
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* regs_within_kernel_stack() checks @addr is within the kernel stack page(s). |
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* If @addr is within the kernel stack, it returns true. If not, returns false. |
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*/ |
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static inline int regs_within_kernel_stack(struct pt_regs *regs, |
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unsigned long addr) |
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{ |
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return ((addr & ~(THREAD_SIZE - 1)) == |
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(kernel_stack_pointer(regs) & ~(THREAD_SIZE - 1))); |
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} |
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/** |
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* regs_get_kernel_stack_nth() - get Nth entry of the stack |
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* @regs: pt_regs which contains kernel stack pointer. |
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* @n: stack entry number. |
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* |
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* regs_get_kernel_stack_nth() returns @n th entry of the kernel stack which |
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* is specified by @regs. If the @n th entry is NOT in the kernel stack, |
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* this returns 0. |
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*/ |
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static inline unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, |
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unsigned int n) |
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{ |
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unsigned long *addr = (unsigned long *)kernel_stack_pointer(regs); |
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addr += n; |
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if (regs_within_kernel_stack(regs, (unsigned long)addr)) |
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return *addr; |
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else |
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return 0; |
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} |
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struct perf_event; |
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struct perf_sample_data; |
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extern void ptrace_triggered(struct perf_event *bp, |
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struct perf_sample_data *data, struct pt_regs *regs); |
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#define task_pt_regs(task) \ |
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((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE) - 1) |
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static inline unsigned long profile_pc(struct pt_regs *regs) |
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{ |
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unsigned long pc = regs->pc; |
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if (virt_addr_uncached(pc)) |
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return CAC_ADDR(pc); |
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return pc; |
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} |
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#endif /* __ASM_SH_PTRACE_H */
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