93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_SW64_PTRACE_H
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#define _ASM_SW64_PTRACE_H
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#include <uapi/asm/ptrace.h>
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#include <asm/hmcall.h>
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#include <asm/page.h>
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#define NO_SYSCALL _AC(-1, UL)
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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/*
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* This struct defines the way the registers are stored on the
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* kernel stack during a system call or other kernel entry
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*/
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struct pt_regs {
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union {
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struct user_pt_regs user_regs;
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struct {
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unsigned long regs[31];
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unsigned long pc;
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unsigned long ps;
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};
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};
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unsigned long orig_r0;
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unsigned long orig_r19;
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/* These are saved by HMcode: */
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unsigned long hm_ps;
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unsigned long hm_pc;
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unsigned long hm_gp;
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unsigned long hm_r16;
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unsigned long hm_r17;
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unsigned long hm_r18;
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};
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#define arch_has_single_step() (1)
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#define user_mode(regs) (((regs)->ps & 8) != 0)
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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 user_stack_pointer(pt_regs) ((pt_regs)->regs[30])
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#define kernel_stack_pointer(regs) ((unsigned long)((regs) + 1))
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#define instruction_pointer_set(regs, val) ((regs)->pc = val)
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#define force_successful_syscall_return() (current_pt_regs()->orig_r0 = NO_SYSCALL)
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#define MAX_REG_OFFSET (offsetof(struct pt_regs, orig_r0))
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extern short regoffsets[];
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extern unsigned long syscall_trace_enter(void);
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extern void syscall_trace_leave(void);
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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 u64 regs_get_register(struct pt_regs *regs, 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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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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static inline int is_syscall_success(struct pt_regs *regs)
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{
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return !regs->regs[19];
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}
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static inline long regs_return_value(struct pt_regs *regs)
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{
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if ((regs->orig_r0 == NO_SYSCALL) || is_syscall_success(regs))
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return regs->regs[0];
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else
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return -regs->regs[0];
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}
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#endif /* !__ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* _ASM_SW64_PTRACE_H */
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