1/* 2 * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.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); 13extern int ptrace_getfpregs(long pid, unsigned long *regs_out); 14extern int ptrace_setfpregs(long pid, unsigned long *regs); 15extern void arch_enter_kernel(void *task, int pid); 16extern void arch_leave_kernel(void *task, int pid); 17extern void ptrace_pokeuser(unsigned long addr, unsigned long data); 18 19 20/* syscall emulation path in ptrace */ 21 22#ifndef PTRACE_SYSEMU 23#define PTRACE_SYSEMU 31 24#endif 25#ifndef PTRACE_SYSEMU_SINGLESTEP 26#define PTRACE_SYSEMU_SINGLESTEP 32 27#endif 28 29/* On architectures, that started to support PTRACE_O_TRACESYSGOOD 30 * in linux 2.4, there are two different definitions of 31 * PTRACE_SETOPTIONS: linux 2.4 uses 21 while linux 2.6 uses 0x4200. 32 * For binary compatibility, 2.6 also supports the old "21", named 33 * PTRACE_OLDSETOPTION. On these architectures, UML always must use 34 * "21", to ensure the kernel runs on 2.4 and 2.6 host without 35 * recompilation. So, we use PTRACE_OLDSETOPTIONS in UML. 36 * We also want to be able to build the kernel on 2.4, which doesn't 37 * have PTRACE_OLDSETOPTIONS. So, if it is missing, we declare 38 * PTRACE_OLDSETOPTIONS to to be the same as PTRACE_SETOPTIONS. 39 * 40 * On architectures, that start to support PTRACE_O_TRACESYSGOOD on 41 * linux 2.6, PTRACE_OLDSETOPTIONS never is defined, and also isn't 42 * supported by the host kernel. In that case, our trick lets us use 43 * the new 0x4200 with the name PTRACE_OLDSETOPTIONS. 44 */ 45#ifndef PTRACE_OLDSETOPTIONS 46#define PTRACE_OLDSETOPTIONS PTRACE_SETOPTIONS 47#endif 48 49void set_using_sysemu(int value); 50int get_using_sysemu(void); 51extern int sysemu_supported; 52 53#define SELECT_PTRACE_OPERATION(sysemu_mode, singlestep_mode) \ 54 (((int[3][3] ) { \ 55 { PTRACE_SYSCALL, PTRACE_SYSCALL, PTRACE_SINGLESTEP }, \ 56 { PTRACE_SYSEMU, PTRACE_SYSEMU, PTRACE_SINGLESTEP }, \ 57 { PTRACE_SYSEMU, PTRACE_SYSEMU_SINGLESTEP, PTRACE_SYSEMU_SINGLESTEP }}) \ 58 [sysemu_mode][singlestep_mode]) 59 60#endif 61