57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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*/
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#ifndef __PTRACE_USER_H__
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#define __PTRACE_USER_H__
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#include <sys/ptrace.h>
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#include <sysdep/ptrace_user.h>
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extern int ptrace_getregs(long pid, unsigned long *regs_out);
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extern int ptrace_setregs(long pid, unsigned long *regs_in);
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/* syscall emulation path in ptrace */
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#ifndef PTRACE_SYSEMU
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#define PTRACE_SYSEMU 31
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#endif
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#ifndef PTRACE_SYSEMU_SINGLESTEP
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#define PTRACE_SYSEMU_SINGLESTEP 32
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#endif
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/* On architectures, that started to support PTRACE_O_TRACESYSGOOD
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* in linux 2.4, there are two different definitions of
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* PTRACE_SETOPTIONS: linux 2.4 uses 21 while linux 2.6 uses 0x4200.
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* For binary compatibility, 2.6 also supports the old "21", named
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* PTRACE_OLDSETOPTION. On these architectures, UML always must use
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* "21", to ensure the kernel runs on 2.4 and 2.6 host without
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* recompilation. So, we use PTRACE_OLDSETOPTIONS in UML.
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* We also want to be able to build the kernel on 2.4, which doesn't
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* have PTRACE_OLDSETOPTIONS. So, if it is missing, we declare
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* PTRACE_OLDSETOPTIONS to be the same as PTRACE_SETOPTIONS.
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*
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* On architectures, that start to support PTRACE_O_TRACESYSGOOD on
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* linux 2.6, PTRACE_OLDSETOPTIONS never is defined, and also isn't
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* supported by the host kernel. In that case, our trick lets us use
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* the new 0x4200 with the name PTRACE_OLDSETOPTIONS.
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*/
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#ifndef PTRACE_OLDSETOPTIONS
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#define PTRACE_OLDSETOPTIONS PTRACE_SETOPTIONS
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#endif
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void set_using_sysemu(int value);
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int get_using_sysemu(void);
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extern int sysemu_supported;
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#define SELECT_PTRACE_OPERATION(sysemu_mode, singlestep_mode) \
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(((int[3][3] ) { \
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{ PTRACE_SYSCALL, PTRACE_SYSCALL, PTRACE_SINGLESTEP }, \
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{ PTRACE_SYSEMU, PTRACE_SYSEMU, PTRACE_SINGLESTEP }, \
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{ PTRACE_SYSEMU, PTRACE_SYSEMU_SINGLESTEP, \
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PTRACE_SYSEMU_SINGLESTEP } }) \
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[sysemu_mode][singlestep_mode])
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#endif
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