Version 0.0.1997.07.17
Added configuration file: functions.cfg
diff --git a/ltrace.c b/ltrace.c
index 432b5eb..dda9683 100644
--- a/ltrace.c
+++ b/ltrace.c
@@ -13,7 +13,7 @@
#include <string.h>
#include <signal.h>
-void print_function(const char *, int);
+extern void print_function(const char *, int);
int pid;
@@ -23,11 +23,15 @@
char * name;
unsigned long addr;
unsigned char value;
- unsigned long return_addr;
- unsigned char return_value;
struct library_symbol * next;
};
+FILE * output = stderr;
+
+unsigned long return_addr;
+unsigned char return_value;
+struct library_symbol * current_symbol;
+
struct library_symbol * library_symbols = NULL;
static int read_elf(char *filename)
@@ -88,9 +92,9 @@
}
}
if (debug>0) {
- fprintf(stderr, "symtab: 0x%08x\n", (unsigned)symtab);
- fprintf(stderr, "symtab_len: %lu\n", symtab_len);
- fprintf(stderr, "strtab: 0x%08x\n", (unsigned)strtab);
+ fprintf(output, "symtab: 0x%08x\n", (unsigned)symtab);
+ fprintf(output, "symtab_len: %lu\n", symtab_len);
+ fprintf(output, "strtab: 0x%08x\n", (unsigned)strtab);
}
if (!symtab) {
return 0;
@@ -108,7 +112,7 @@
library_symbols->name = strtab+(symtab+i)->st_name;
library_symbols->next = tmp;
if (debug>0) {
- fprintf(stderr, "addr: 0x%08x, symbol: \"%s\"\n",
+ fprintf(output, "addr: 0x%08x, symbol: \"%s\"\n",
(unsigned)((symtab+i)->st_value),
(strtab+(symtab+i)->st_name));
}
@@ -117,27 +121,48 @@
return 1;
}
+static void insert_breakpoint(int pid, unsigned long addr, unsigned char * value)
+{
+}
+
+static void delete_breakpoint(int pid, unsigned long addr, unsigned char * value)
+{
+}
+
+static void usage(void)
+{
+ fprintf(stderr," Usage: ltrace [-d][-o output] <program> [<arguments>...]\n");
+}
+
int main(int argc, char **argv)
{
int status;
struct library_symbol * tmp = NULL;
- while ((argc>1) && (argv[1][0] == '-') && (argv[1][2] == '\0')) {
+ while ((argc>2) && (argv[1][0] == '-') && (argv[1][2] == '\0')) {
switch(argv[1][1]) {
case 'd': debug++;
break;
+ case 'o': output = fopen(argv[2], "w");
+ if (!output) {
+ fprintf(stderr, "Can't open %s for output: %s\n", argv[2], sys_errlist[errno]);
+ exit(1);
+ }
+ argc--; argv++;
+ break;
default: fprintf(stderr, "Unknown option '%c'\n", argv[1][1]);
+ usage();
exit(1);
}
argc--; argv++;
}
if (argc<2) {
- fprintf(stderr, "Usage: %s [<options>] <program> [<arguments>]\n", argv[0]);
+ usage();
exit(1);
}
if (!read_elf(argv[1])) {
- fprintf(stderr, "%s: Not dynamically linked\n", argv[0]);
+ fprintf(stderr, "%s: Not dynamically linked\n", argv[1]);
exit(1);
}
pid = fork();
@@ -153,7 +178,7 @@
fprintf(stderr, "Can't execute \"%s\": %s\n", argv[1], sys_errlist[errno]);
exit(1);
}
- fprintf(stderr, "pid %u attached\n", pid);
+ fprintf(output, "pid %u attached\n", pid);
/* Enable breakpoints: */
pid = wait4(-1, &status, 0, NULL);
@@ -161,7 +186,7 @@
perror("wait4");
exit(1);
}
- fprintf(stderr, "Enabling breakpoints...\n");
+ fprintf(output, "Enabling breakpoints...\n");
tmp = library_symbols;
while(tmp) {
int a;
@@ -182,26 +207,26 @@
pid = wait4(-1, &status, 0, NULL);
if (pid==-1) {
if (errno == ECHILD) {
- fprintf(stderr, "No more children\n");
+ fprintf(output, "No more children\n");
exit(0);
}
perror("wait4");
exit(1);
}
if (WIFEXITED(status)) {
- fprintf(stderr, "pid %u exited\n", pid);
+ fprintf(output, "pid %u exited\n", pid);
continue;
}
if (WIFSIGNALED(status)) {
- fprintf(stderr, "pid %u exited on signal %u\n", pid, WTERMSIG(status));
+ fprintf(output, "pid %u exited on signal %u\n", pid, WTERMSIG(status));
continue;
}
if (!WIFSTOPPED(status)) {
- fprintf(stderr, "pid %u ???\n", pid);
+ fprintf(output, "pid %u ???\n", pid);
continue;
}
if (WSTOPSIG(status) != SIGTRAP) {
- fprintf(stderr, "Signal: %u\n", WSTOPSIG(status));
+ fprintf(output, "Signal: %u\n", WSTOPSIG(status));
ptrace(PTRACE_CONT, pid, 1, WSTOPSIG(status));
continue;
}
@@ -209,10 +234,10 @@
eip = ptrace(PTRACE_PEEKUSR, pid, 4*EIP, 0);
esp = ptrace(PTRACE_PEEKUSR, pid, 4*UESP, 0);
#if 0
- fprintf(stderr,"EIP = 0x%08x\n", eip);
- fprintf(stderr,"ESP = 0x%08x\n", esp);
+ fprintf(output,"EIP = 0x%08x\n", eip);
+ fprintf(output,"ESP = 0x%08x\n", esp);
#endif
- fprintf(stderr,"[0x%08x] ", ptrace(PTRACE_PEEKTEXT, pid, esp, 0));
+ fprintf(output,"[0x%08x] ", ptrace(PTRACE_PEEKTEXT, pid, esp, 0));
tmp = library_symbols;
function_seen = 0;
while(tmp) {
@@ -229,7 +254,7 @@
pid = wait4(-1, &status, 0, NULL);
if (pid==-1) {
if (errno == ECHILD) {
- fprintf(stderr, "No more children\n");
+ fprintf(output, "No more children\n");
exit(0);
}
perror("wait4");
@@ -245,7 +270,7 @@
tmp = tmp->next;
}
if (!function_seen) {
- fprintf(stderr, "pid %u stopped; continuing it...\n", pid);
+ fprintf(output, "pid %u stopped; continuing it...\n", pid);
ptrace(PTRACE_CONT, pid, 1, 0);
}
}