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100 lines
2.4 KiB
100 lines
2.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __ASM_CSKY_PTRACE_H |
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#define __ASM_CSKY_PTRACE_H |
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#include <uapi/asm/ptrace.h> |
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#include <asm/traps.h> |
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#include <linux/types.h> |
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#include <linux/compiler.h> |
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#ifndef __ASSEMBLY__ |
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#define PS_S 0x80000000 /* Supervisor Mode */ |
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#define USR_BKPT 0x1464 |
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#define arch_has_single_step() (1) |
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#define current_pt_regs() \ |
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({ (struct pt_regs *)((char *)current_thread_info() + THREAD_SIZE) - 1; }) |
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#define user_stack_pointer(regs) ((regs)->usp) |
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#define user_mode(regs) (!((regs)->sr & PS_S)) |
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#define instruction_pointer(regs) ((regs)->pc) |
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#define profile_pc(regs) instruction_pointer(regs) |
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#define trap_no(regs) ((regs->sr >> 16) & 0xff) |
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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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#if defined(__CSKYABIV2__) |
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#define MAX_REG_OFFSET offsetof(struct pt_regs, dcsr) |
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#else |
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#define MAX_REG_OFFSET offsetof(struct pt_regs, regs[9]) |
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#endif |
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static inline bool in_syscall(struct pt_regs const *regs) |
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{ |
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return ((regs->sr >> 16) & 0xff) == VEC_TRAP0; |
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} |
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static inline void forget_syscall(struct pt_regs *regs) |
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{ |
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regs->sr &= ~(0xff << 16); |
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} |
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static inline unsigned long regs_return_value(struct pt_regs *regs) |
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{ |
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return regs->a0; |
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} |
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static inline void regs_set_return_value(struct pt_regs *regs, |
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unsigned long val) |
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{ |
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regs->a0 = val; |
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} |
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/* Valid only for Kernel mode traps. */ |
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static inline unsigned long kernel_stack_pointer(struct pt_regs *regs) |
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{ |
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return regs->usp; |
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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[4]; |
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} |
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static inline void frame_pointer_set(struct pt_regs *regs, |
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unsigned long val) |
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{ |
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regs->regs[4] = val; |
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} |
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extern int regs_query_register_offset(const char *name); |
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extern 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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* 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 of the register. |
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* |
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* regs_get_register returns the value of a register whose offset from @regs. |
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* The @offset is the offset of the register in struct pt_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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#endif /* __ASSEMBLY__ */ |
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#endif /* __ASM_CSKY_PTRACE_H */
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