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Juan Cespedesa4850832002-03-03 02:37:50 +01001#if HAVE_CONFIG_H
2#include "config.h"
3#endif
4
5#include <sys/ptrace.h>
Ian Wienand5570a772006-02-17 02:00:00 +01006#include <string.h>
Juan Cespedes8d1b92b2009-07-03 10:39:34 +02007#include "common.h"
Juan Cespedesa4850832002-03-03 02:37:50 +01008
9static unsigned char break_insn[] = BREAKPOINT_VALUE;
10
Ian Wienand5570a772006-02-17 02:00:00 +010011#ifdef ARCH_HAVE_ENABLE_BREAKPOINT
Juan Cespedes1dec2172009-05-07 10:12:10 +020012extern void arch_enable_breakpoint(pid_t, Breakpoint *);
Juan Cespedesf1350522008-12-16 18:19:58 +010013void
Juan Cespedes1dec2172009-05-07 10:12:10 +020014enable_breakpoint(pid_t pid, Breakpoint *sbp) {
Juan Cespedescd8976d2009-05-14 13:47:58 +020015 if (sbp->libsym) {
16 debug(DEBUG_PROCESS, "enable_breakpoint: pid=%d, addr=%p, symbol=%s", pid, sbp->addr, sbp->libsym->name);
17 } else {
18 debug(DEBUG_PROCESS, "enable_breakpoint: pid=%d, addr=%p", pid, sbp->addr);
19 }
Ian Wienand9a2ad352006-02-20 22:44:45 +010020 arch_enable_breakpoint(pid, sbp);
Ian Wienand5570a772006-02-17 02:00:00 +010021}
22#else
Juan Cespedesf1350522008-12-16 18:19:58 +010023void
Juan Cespedes1dec2172009-05-07 10:12:10 +020024enable_breakpoint(pid_t pid, Breakpoint *sbp) {
Paul Gilliam3f1219f2006-04-24 18:25:38 +020025 unsigned int i, j;
Juan Cespedesa4850832002-03-03 02:37:50 +010026
Juan Cespedescd8976d2009-05-14 13:47:58 +020027 if (sbp->libsym) {
28 debug(DEBUG_PROCESS, "enable_breakpoint: pid=%d, addr=%p, symbol=%s", pid, sbp->addr, sbp->libsym->name);
29 } else {
30 debug(DEBUG_PROCESS, "enable_breakpoint: pid=%d, addr=%p", pid, sbp->addr);
31 }
Juan Cespedesa4850832002-03-03 02:37:50 +010032
Ian Wienand2d45b1a2006-02-20 22:48:07 +010033 for (i = 0; i < 1 + ((BREAKPOINT_LENGTH - 1) / sizeof(long)); i++) {
34 long a =
35 ptrace(PTRACE_PEEKTEXT, pid, sbp->addr + i * sizeof(long),
36 0);
37 for (j = 0;
38 j < sizeof(long)
39 && i * sizeof(long) + j < BREAKPOINT_LENGTH; j++) {
40 unsigned char *bytes = (unsigned char *)&a;
Juan Cespedesa4850832002-03-03 02:37:50 +010041
Paul Gilliam76c61f12006-06-14 06:55:21 +020042 sbp->orig_value[i * sizeof(long) + j] = bytes[j];
Ian Wienand2d45b1a2006-02-20 22:48:07 +010043 bytes[j] = break_insn[i * sizeof(long) + j];
Juan Cespedesa4850832002-03-03 02:37:50 +010044 }
Ian Wienand2d45b1a2006-02-20 22:48:07 +010045 ptrace(PTRACE_POKETEXT, pid, sbp->addr + i * sizeof(long), a);
Juan Cespedesa4850832002-03-03 02:37:50 +010046 }
47}
Ian Wienand2d45b1a2006-02-20 22:48:07 +010048#endif /* ARCH_HAVE_ENABLE_BREAKPOINT */
Juan Cespedesa4850832002-03-03 02:37:50 +010049
Ian Wienand5570a772006-02-17 02:00:00 +010050#ifdef ARCH_HAVE_DISABLE_BREAKPOINT
Juan Cespedes1dec2172009-05-07 10:12:10 +020051extern void arch_disable_breakpoint(pid_t, const Breakpoint *sbp);
Juan Cespedesf1350522008-12-16 18:19:58 +010052void
Juan Cespedes1dec2172009-05-07 10:12:10 +020053disable_breakpoint(pid_t pid, const Breakpoint *sbp) {
Juan Cespedescd8976d2009-05-14 13:47:58 +020054 if (sbp->libsym) {
55 debug(DEBUG_PROCESS, "disable_breakpoint: pid=%d, addr=%p, symbol=%s", pid, sbp->addr, sbp->libsym->name);
56 } else {
57 debug(DEBUG_PROCESS, "disable_breakpoint: pid=%d, addr=%p", pid, sbp->addr);
58 }
Ian Wienand5570a772006-02-17 02:00:00 +010059 arch_disable_breakpoint(pid, sbp);
60}
61#else
Juan Cespedesf1350522008-12-16 18:19:58 +010062void
Juan Cespedes1dec2172009-05-07 10:12:10 +020063disable_breakpoint(pid_t pid, const Breakpoint *sbp) {
Paul Gilliam3f1219f2006-04-24 18:25:38 +020064 unsigned int i, j;
Juan Cespedesa4850832002-03-03 02:37:50 +010065
Juan Cespedescd8976d2009-05-14 13:47:58 +020066 if (sbp->libsym) {
67 debug(DEBUG_PROCESS, "disable_breakpoint: pid=%d, addr=%p, symbol=%s", pid, sbp->addr, sbp->libsym->name);
68 } else {
69 debug(DEBUG_PROCESS, "disable_breakpoint: pid=%d, addr=%p", pid, sbp->addr);
70 }
Juan Cespedesa4850832002-03-03 02:37:50 +010071
Ian Wienand2d45b1a2006-02-20 22:48:07 +010072 for (i = 0; i < 1 + ((BREAKPOINT_LENGTH - 1) / sizeof(long)); i++) {
73 long a =
74 ptrace(PTRACE_PEEKTEXT, pid, sbp->addr + i * sizeof(long),
75 0);
76 for (j = 0;
77 j < sizeof(long)
78 && i * sizeof(long) + j < BREAKPOINT_LENGTH; j++) {
79 unsigned char *bytes = (unsigned char *)&a;
Juan Cespedesa4850832002-03-03 02:37:50 +010080
Ian Wienand2d45b1a2006-02-20 22:48:07 +010081 bytes[j] = sbp->orig_value[i * sizeof(long) + j];
Juan Cespedesa4850832002-03-03 02:37:50 +010082 }
Ian Wienand2d45b1a2006-02-20 22:48:07 +010083 ptrace(PTRACE_POKETEXT, pid, sbp->addr + i * sizeof(long), a);
Juan Cespedesa4850832002-03-03 02:37:50 +010084 }
85}
Ian Wienand2d45b1a2006-02-20 22:48:07 +010086#endif /* ARCH_HAVE_DISABLE_BREAKPOINT */