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 <sys/ptrace.h> 10 #include <sysdep/ptrace_user.h> 11 12 extern int ptrace_getregs(long pid, unsigned long *regs_out); 13 extern int ptrace_setregs(long pid, unsigned long *regs_in); 14 15 /* syscall emulation path in ptrace */ 16 17 #ifndef PTRACE_SYSEMU 18 #define PTRACE_SYSEMU 31 19 #endif 20 #ifndef PTRACE_SYSEMU_SINGLESTEP 21 #define PTRACE_SYSEMU_SINGLESTEP 32 22 #endif 23 24 /* On architectures, that started to support PTRACE_O_TRACESYSGOOD 25 * in linux 2.4, there are two different definitions of 26 * PTRACE_SETOPTIONS: linux 2.4 uses 21 while linux 2.6 uses 0x4200. 27 * For binary compatibility, 2.6 also supports the old "21", named 28 * PTRACE_OLDSETOPTION. On these architectures, UML always must use 29 * "21", to ensure the kernel runs on 2.4 and 2.6 host without 30 * recompilation. So, we use PTRACE_OLDSETOPTIONS in UML. 31 * We also want to be able to build the kernel on 2.4, which doesn't 32 * have PTRACE_OLDSETOPTIONS. So, if it is missing, we declare 33 * PTRACE_OLDSETOPTIONS to be the same as PTRACE_SETOPTIONS. 34 * 35 * On architectures, that start to support PTRACE_O_TRACESYSGOOD on 36 * linux 2.6, PTRACE_OLDSETOPTIONS never is defined, and also isn't 37 * supported by the host kernel. In that case, our trick lets us use 38 * the new 0x4200 with the name PTRACE_OLDSETOPTIONS. 39 */ 40 #ifndef PTRACE_OLDSETOPTIONS 41 #define PTRACE_OLDSETOPTIONS PTRACE_SETOPTIONS 42 #endif 43 44 void set_using_sysemu(int value); 45 int get_using_sysemu(void); 46 extern int sysemu_supported; 47 48 #define SELECT_PTRACE_OPERATION(sysemu_mode, singlestep_mode) \ 49 (((int[3][3] ) { \ 50 { PTRACE_SYSCALL, PTRACE_SYSCALL, PTRACE_SINGLESTEP }, \ 51 { PTRACE_SYSEMU, PTRACE_SYSEMU, PTRACE_SINGLESTEP }, \ 52 { PTRACE_SYSEMU, PTRACE_SYSEMU_SINGLESTEP, \ 53 PTRACE_SYSEMU_SINGLESTEP } }) \ 54 [sysemu_mode][singlestep_mode]) 55 56 #endif 57