Juan Cespedes | 5e01f65 | 1998-03-08 22:31:44 +0100 | [diff] [blame] | 1 | #include <stdio.h> |
Juan Cespedes | 504a385 | 2003-02-04 23:24:38 +0100 | [diff] [blame] | 2 | #include <stdlib.h> |
Juan Cespedes | 1fe93d5 | 1998-03-13 00:29:21 +0100 | [diff] [blame] | 3 | #include <string.h> |
| 4 | #include <errno.h> |
Juan Cespedes | 8f8282f | 2002-03-03 18:58:40 +0100 | [diff] [blame] | 5 | #include <unistd.h> |
Juan Cespedes | 5e01f65 | 1998-03-08 22:31:44 +0100 | [diff] [blame] | 6 | #include <sys/types.h> |
Juan Cespedes | 5c3fe06 | 2004-06-14 18:08:37 +0200 | [diff] [blame] | 7 | #include "ptrace.h" |
Juan Cespedes | 5e01f65 | 1998-03-08 22:31:44 +0100 | [diff] [blame] | 8 | #include <asm/unistd.h> |
| 9 | |
| 10 | #include "ltrace.h" |
| 11 | #include "options.h" |
| 12 | |
Juan Cespedes | 81690ef | 1998-03-13 19:31:29 +0100 | [diff] [blame] | 13 | /* Returns 1 if the sysnum may make a new child to be created |
| 14 | * (ie, with fork() or clone()) |
| 15 | * Returns 0 otherwise. |
| 16 | */ |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 17 | int fork_p(int sysnum) |
| 18 | { |
Juan Cespedes | e3eb9aa | 1999-04-03 03:21:52 +0200 | [diff] [blame] | 19 | return 0 |
| 20 | #if defined(__NR_fork) |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 21 | || (sysnum == __NR_fork) |
Juan Cespedes | e3eb9aa | 1999-04-03 03:21:52 +0200 | [diff] [blame] | 22 | #endif |
| 23 | #if defined(__NR_clone) |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 24 | || (sysnum == __NR_clone) |
Juan Cespedes | e3eb9aa | 1999-04-03 03:21:52 +0200 | [diff] [blame] | 25 | #endif |
| 26 | #if defined(__NR_vfork) |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 27 | || (sysnum == __NR_vfork) |
Juan Cespedes | e3eb9aa | 1999-04-03 03:21:52 +0200 | [diff] [blame] | 28 | #endif |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 29 | ; |
Juan Cespedes | 5e01f65 | 1998-03-08 22:31:44 +0100 | [diff] [blame] | 30 | } |
| 31 | |
Juan Cespedes | 81690ef | 1998-03-13 19:31:29 +0100 | [diff] [blame] | 32 | /* Returns 1 if the sysnum may make the process exec other program |
| 33 | */ |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 34 | int exec_p(int sysnum) |
| 35 | { |
Juan Cespedes | 81690ef | 1998-03-13 19:31:29 +0100 | [diff] [blame] | 36 | return (sysnum == __NR_execve); |
| 37 | } |
| 38 | |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 39 | void trace_me(void) |
| 40 | { |
| 41 | if (ptrace(PTRACE_TRACEME, 0, 1, 0) < 0) { |
Juan Cespedes | 5e01f65 | 1998-03-08 22:31:44 +0100 | [diff] [blame] | 42 | perror("PTRACE_TRACEME"); |
| 43 | exit(1); |
| 44 | } |
| 45 | } |
| 46 | |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 47 | int trace_pid(pid_t pid) |
| 48 | { |
Juan Cespedes | 1fe93d5 | 1998-03-13 00:29:21 +0100 | [diff] [blame] | 49 | if (ptrace(PTRACE_ATTACH, pid, 1, 0) < 0) { |
Juan Cespedes | 273ea6d | 1998-03-14 23:02:40 +0100 | [diff] [blame] | 50 | return -1; |
Juan Cespedes | 1fe93d5 | 1998-03-13 00:29:21 +0100 | [diff] [blame] | 51 | } |
Juan Cespedes | 273ea6d | 1998-03-14 23:02:40 +0100 | [diff] [blame] | 52 | return 0; |
| 53 | } |
| 54 | |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 55 | void untrace_pid(pid_t pid) |
| 56 | { |
Juan Cespedes | 273ea6d | 1998-03-14 23:02:40 +0100 | [diff] [blame] | 57 | ptrace(PTRACE_DETACH, pid, 1, 0); |
Juan Cespedes | 1fe93d5 | 1998-03-13 00:29:21 +0100 | [diff] [blame] | 58 | } |
| 59 | |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 60 | void continue_after_signal(pid_t pid, int signum) |
| 61 | { |
Juan Cespedes | 5e01f65 | 1998-03-08 22:31:44 +0100 | [diff] [blame] | 62 | /* We should always trace syscalls to be able to control fork(), clone(), execve()... */ |
Juan Cespedes | 5916fda | 2002-02-25 00:19:21 +0100 | [diff] [blame] | 63 | ptrace(PTRACE_SYSCALL, pid, 0, signum); |
Juan Cespedes | 5e01f65 | 1998-03-08 22:31:44 +0100 | [diff] [blame] | 64 | } |
| 65 | |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 66 | void continue_process(pid_t pid) |
| 67 | { |
Juan Cespedes | 5e01f65 | 1998-03-08 22:31:44 +0100 | [diff] [blame] | 68 | continue_after_signal(pid, 0); |
| 69 | } |
| 70 | |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 71 | void continue_enabling_breakpoint(pid_t pid, struct breakpoint *sbp) |
| 72 | { |
Juan Cespedes | 5b3ffdf | 2001-07-02 00:52:45 +0200 | [diff] [blame] | 73 | enable_breakpoint(pid, sbp); |
Juan Cespedes | 5e01f65 | 1998-03-08 22:31:44 +0100 | [diff] [blame] | 74 | continue_process(pid); |
| 75 | } |
Juan Cespedes | 8cc1b9d | 2002-03-01 19:54:23 +0100 | [diff] [blame] | 76 | |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 77 | void continue_after_breakpoint(struct process *proc, struct breakpoint *sbp) |
| 78 | { |
| 79 | if (sbp->enabled) |
| 80 | disable_breakpoint(proc->pid, sbp); |
Juan Cespedes | 5c3fe06 | 2004-06-14 18:08:37 +0200 | [diff] [blame] | 81 | set_instruction_pointer(proc, sbp->addr); |
Juan Cespedes | 8f8282f | 2002-03-03 18:58:40 +0100 | [diff] [blame] | 82 | if (sbp->enabled == 0) { |
| 83 | continue_process(proc->pid); |
| 84 | } else { |
| 85 | proc->breakpoint_being_enabled = sbp; |
Juan Cespedes | 5c3fe06 | 2004-06-14 18:08:37 +0200 | [diff] [blame] | 86 | #ifdef __sparc__ |
| 87 | continue_process(proc->pid); |
| 88 | #else |
Juan Cespedes | 8f8282f | 2002-03-03 18:58:40 +0100 | [diff] [blame] | 89 | ptrace(PTRACE_SINGLESTEP, proc->pid, 0, 0); |
Juan Cespedes | 5c3fe06 | 2004-06-14 18:08:37 +0200 | [diff] [blame] | 90 | #endif |
Juan Cespedes | 8f8282f | 2002-03-03 18:58:40 +0100 | [diff] [blame] | 91 | } |
| 92 | } |
| 93 | |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 94 | int umovestr(struct process *proc, void *addr, int len, void *laddr) |
| 95 | { |
| 96 | union { |
| 97 | long a; |
| 98 | char c[sizeof(long)]; |
| 99 | } a; |
Juan Cespedes | 8cc1b9d | 2002-03-01 19:54:23 +0100 | [diff] [blame] | 100 | int i; |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 101 | int offset = 0; |
Juan Cespedes | 8cc1b9d | 2002-03-01 19:54:23 +0100 | [diff] [blame] | 102 | |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 103 | while (offset < len) { |
| 104 | a.a = ptrace(PTRACE_PEEKTEXT, proc->pid, addr + offset, 0); |
| 105 | for (i = 0; i < sizeof(long); i++) { |
| 106 | if (a.c[i] && offset + i < len) { |
| 107 | *(char *)(laddr + offset + i) = a.c[i]; |
Juan Cespedes | 8cc1b9d | 2002-03-01 19:54:23 +0100 | [diff] [blame] | 108 | } else { |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 109 | *(char *)(laddr + offset + i) = '\0'; |
Juan Cespedes | 8cc1b9d | 2002-03-01 19:54:23 +0100 | [diff] [blame] | 110 | return 0; |
| 111 | } |
| 112 | } |
| 113 | offset += sizeof(long); |
| 114 | } |
Ian Wienand | 3219f32 | 2006-02-16 06:00:00 +0100 | [diff] [blame^] | 115 | *(char *)(laddr + offset) = '\0'; |
Juan Cespedes | 8cc1b9d | 2002-03-01 19:54:23 +0100 | [diff] [blame] | 116 | return 0; |
| 117 | } |