5208ba24e7
for the architectures that have usp in pt_regs and do not have user_stack_pointer() already defined. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
71 lines
2 KiB
C
71 lines
2 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1994, 95, 96, 97, 98, 99, 2000 by Ralf Baechle
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* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
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*/
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#ifndef _ASM_PTRACE_H
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#define _ASM_PTRACE_H
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#include <linux/compiler.h>
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#include <linux/linkage.h>
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#include <linux/types.h>
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#include <asm/isadep.h>
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#include <uapi/asm/ptrace.h>
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struct task_struct;
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extern int ptrace_getregs(struct task_struct *child, __s64 __user *data);
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extern int ptrace_setregs(struct task_struct *child, __s64 __user *data);
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extern int ptrace_getfpregs(struct task_struct *child, __u32 __user *data);
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extern int ptrace_setfpregs(struct task_struct *child, __u32 __user *data);
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extern int ptrace_get_watch_regs(struct task_struct *child,
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struct pt_watch_regs __user *addr);
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extern int ptrace_set_watch_regs(struct task_struct *child,
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struct pt_watch_regs __user *addr);
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/*
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* Does the process account for user or for system time?
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*/
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#define user_mode(regs) (((regs)->cp0_status & KU_MASK) == KU_USER)
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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[7];
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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 (is_syscall_success(regs))
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return regs->regs[2];
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else
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return -regs->regs[2];
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}
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#define instruction_pointer(regs) ((regs)->cp0_epc)
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#define profile_pc(regs) instruction_pointer(regs)
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#define user_stack_pointer(r) ((r)->regs[29])
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extern asmlinkage void syscall_trace_enter(struct pt_regs *regs);
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extern asmlinkage void syscall_trace_leave(struct pt_regs *regs);
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extern void die(const char *, struct pt_regs *) __noreturn;
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static inline void die_if_kernel(const char *str, struct pt_regs *regs)
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{
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if (unlikely(!user_mode(regs)))
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die(str, regs);
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}
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#define current_pt_regs() \
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({ \
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unsigned long sp = (unsigned long)__builtin_frame_address(0); \
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(struct pt_regs *)((sp | (THREAD_SIZE - 1)) + 1 - 32) - 1; \
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})
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#endif /* _ASM_PTRACE_H */
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