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| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|---|
| 2 | |
| 3 | #ifndef __ASM_CSKY_PTRACE_H |
| 4 | #define __ASM_CSKY_PTRACE_H |
| 5 | |
| 6 | #include <uapi/asm/ptrace.h> |
| 7 | #include <asm/traps.h> |
| 8 | #include <linux/types.h> |
| 9 | #include <linux/compiler.h> |
| 10 | |
| 11 | #ifndef __ASSEMBLER__ |
| 12 | |
| 13 | #define PS_S 0x80000000 /* Supervisor Mode */ |
| 14 | |
| 15 | #define USR_BKPT 0x1464 |
| 16 | |
| 17 | #define arch_has_single_step() (1) |
| 18 | #define current_pt_regs() \ |
| 19 | ({ (struct pt_regs *)((char *)current_thread_info() + THREAD_SIZE) - 1; }) |
| 20 | |
| 21 | #define user_stack_pointer(regs) ((regs)->usp) |
| 22 | |
| 23 | #define user_mode(regs) (!((regs)->sr & PS_S)) |
| 24 | #define instruction_pointer(regs) ((regs)->pc) |
| 25 | #define profile_pc(regs) instruction_pointer(regs) |
| 26 | #define trap_no(regs) ((regs->sr >> 16) & 0xff) |
| 27 | |
| 28 | static inline void instruction_pointer_set(struct pt_regs *regs, |
| 29 | unsigned long val) |
| 30 | { |
| 31 | regs->pc = val; |
| 32 | } |
| 33 | |
| 34 | #if defined(__CSKYABIV2__) |
| 35 | #define MAX_REG_OFFSET offsetof(struct pt_regs, dcsr) |
| 36 | #else |
| 37 | #define MAX_REG_OFFSET offsetof(struct pt_regs, regs[9]) |
| 38 | #endif |
| 39 | |
| 40 | static inline bool in_syscall(struct pt_regs const *regs) |
| 41 | { |
| 42 | return ((regs->sr >> 16) & 0xff) == VEC_TRAP0; |
| 43 | } |
| 44 | |
| 45 | static inline void forget_syscall(struct pt_regs *regs) |
| 46 | { |
| 47 | regs->sr &= ~(0xff << 16); |
| 48 | } |
| 49 | |
| 50 | static inline unsigned long regs_return_value(struct pt_regs *regs) |
| 51 | { |
| 52 | return regs->a0; |
| 53 | } |
| 54 | |
| 55 | static inline void regs_set_return_value(struct pt_regs *regs, |
| 56 | unsigned long val) |
| 57 | { |
| 58 | regs->a0 = val; |
| 59 | } |
| 60 | |
| 61 | /* Valid only for Kernel mode traps. */ |
| 62 | static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) |
| 63 | { |
| 64 | return regs->usp; |
| 65 | } |
| 66 | |
| 67 | static inline unsigned long frame_pointer(struct pt_regs *regs) |
| 68 | { |
| 69 | return regs->regs[4]; |
| 70 | } |
| 71 | static inline void frame_pointer_set(struct pt_regs *regs, |
| 72 | unsigned long val) |
| 73 | { |
| 74 | regs->regs[4] = val; |
| 75 | } |
| 76 | |
| 77 | extern int regs_query_register_offset(const char *name); |
| 78 | extern unsigned long regs_get_kernel_stack_nth(struct pt_regs *regs, |
| 79 | unsigned int n); |
| 80 | |
| 81 | /* |
| 82 | * regs_get_register() - get register value from its offset |
| 83 | * @regs: pt_regs from which register value is gotten |
| 84 | * @offset: offset of the register. |
| 85 | * |
| 86 | * regs_get_register returns the value of a register whose offset from @regs. |
| 87 | * The @offset is the offset of the register in struct pt_regs. |
| 88 | * If @offset is bigger than MAX_REG_OFFSET, this returns 0. |
| 89 | */ |
| 90 | static inline unsigned long regs_get_register(struct pt_regs *regs, |
| 91 | unsigned int offset) |
| 92 | { |
| 93 | if (unlikely(offset > MAX_REG_OFFSET)) |
| 94 | return 0; |
| 95 | |
| 96 | return *(unsigned long *)((unsigned long)regs + offset); |
| 97 | } |
| 98 | |
| 99 | asmlinkage int syscall_trace_enter(struct pt_regs *regs); |
| 100 | asmlinkage void syscall_trace_exit(struct pt_regs *regs); |
| 101 | #endif /* __ASSEMBLER__ */ |
| 102 | #endif /* __ASM_CSKY_PTRACE_H */ |
| 103 |
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