1/* 2 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) 3 * Licensed under the GPL 4 */ 5 6#ifndef __PTRACE_USER_H__ 7#define __PTRACE_USER_H__ 8 9#include "sysdep/ptrace_user.h" 10 11extern int ptrace_getregs(long pid, unsigned long *regs_out); 12extern int ptrace_setregs(long pid, unsigned long *regs_in); 13 14/* syscall emulation path in ptrace */ 15 16#ifndef PTRACE_SYSEMU 17#define PTRACE_SYSEMU 31 18#endif 19#ifndef PTRACE_SYSEMU_SINGLESTEP 20#define PTRACE_SYSEMU_SINGLESTEP 32 21#endif 22 23/* On architectures, that started to support PTRACE_O_TRACESYSGOOD 24 * in linux 2.4, there are two different definitions of 25 * PTRACE_SETOPTIONS: linux 2.4 uses 21 while linux 2.6 uses 0x4200. 26 * For binary compatibility, 2.6 also supports the old "21", named 27 * PTRACE_OLDSETOPTION. On these architectures, UML always must use 28 * "21", to ensure the kernel runs on 2.4 and 2.6 host without 29 * recompilation. So, we use PTRACE_OLDSETOPTIONS in UML. 30 * We also want to be able to build the kernel on 2.4, which doesn't 31 * have PTRACE_OLDSETOPTIONS. So, if it is missing, we declare 32 * PTRACE_OLDSETOPTIONS to be the same as PTRACE_SETOPTIONS. 33 * 34 * On architectures, that start to support PTRACE_O_TRACESYSGOOD on 35 * linux 2.6, PTRACE_OLDSETOPTIONS never is defined, and also isn't 36 * supported by the host kernel. In that case, our trick lets us use 37 * the new 0x4200 with the name PTRACE_OLDSETOPTIONS. 38 */ 39#ifndef PTRACE_OLDSETOPTIONS 40#define PTRACE_OLDSETOPTIONS PTRACE_SETOPTIONS 41#endif 42 43void set_using_sysemu(int value); 44int get_using_sysemu(void); 45extern int sysemu_supported; 46 47#define SELECT_PTRACE_OPERATION(sysemu_mode, singlestep_mode) \ 48 (((int[3][3] ) { \ 49 { PTRACE_SYSCALL, PTRACE_SYSCALL, PTRACE_SINGLESTEP }, \ 50 { PTRACE_SYSEMU, PTRACE_SYSEMU, PTRACE_SINGLESTEP }, \ 51 { PTRACE_SYSEMU, PTRACE_SYSEMU_SINGLESTEP, \ 52 PTRACE_SYSEMU_SINGLESTEP } }) \ 53 [sysemu_mode][singlestep_mode]) 54 55#endif 56