| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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 |