sigcontext.h

来自「底层驱动开发」· C头文件 代码 · 共 54 行

/*
 * Copyright 2003 PathScale, Inc.
 *
 * Licensed under the GPL
 */

#ifndef __SYSDEP_X86_64_SIGCONTEXT_H
#define __SYSDEP_X86_64_SIGCONTEXT_H

#include <sysdep/sc.h>

#define IP_RESTART_SYSCALL(ip) ((ip) -= 2)

#define SC_RESTART_SYSCALL(sc) IP_RESTART_SYSCALL(SC_IP(sc))
#define SC_SET_SYSCALL_RETURN(sc, result) SC_RAX(sc) = (result)

#define SC_FAULT_ADDR(sc) SC_CR2(sc)
#define SC_FAULT_TYPE(sc) SC_ERR(sc)

#define GET_FAULTINFO_FROM_SC(fi,sc) \
	{ \
		(fi).cr2 = SC_CR2(sc); \
		(fi).error_code = SC_ERR(sc); \
		(fi).trap_no = SC_TRAPNO(sc); \
	}

/* ptrace expects that, at the start of a system call, %eax contains
 * -ENOSYS, so this makes it so.
 */

#define SC_START_SYSCALL(sc) do SC_RAX(sc) = -ENOSYS; while(0)

/* This is Page Fault */
#define SEGV_IS_FIXABLE(fi)	((fi)->trap_no == 14)

/* No broken SKAS API, which doesn't pass trap_no, here. */
#define SEGV_MAYBE_FIXABLE(fi)	0

extern unsigned long *sc_sigmask(void *sc_ptr);

#endif

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * Emacs will notice this stuff at the end of the file and automatically
 * adjust the settings for this buffer only.  This must remain at the end
 * of the file.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-file-style: "linux"
 * End:
 */