diff options
Diffstat (limited to 'elf/rtld.c')
| -rw-r--r-- | elf/rtld.c | 30 |
1 files changed, 30 insertions, 0 deletions
@@ -17,6 +17,7 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +#include <fcntl.h> #include <link.h> #include <stddef.h> #include <stdlib.h> @@ -74,6 +75,7 @@ const char *_dl_profile; const char *_dl_profile_output; struct link_map *_dl_profile_map; int _dl_debug_libs; +int _dl_debug_impcalls; /* Set nonzero during loading and initialization of executable and libraries, cleared before the executable's entry point runs. This @@ -907,6 +909,9 @@ print_missing_version (int errcode __attribute__ ((unused)), objname, ": ", errstring, "\n", NULL); } +/* Nonzero if any of the debugging options is enabled. */ +static int any_debug; + /* Process the string given as the parameter which explains which debugging options are enabled. */ static void @@ -924,6 +929,8 @@ process_dl_debug (char *dl_debug) && (issep (dl_debug[4]) || dl_debug[4] == '\0')) { _dl_debug_libs = 1; + _dl_debug_impcalls = 1; + any_debug = 1; dl_debug += 4; } else if (strncmp (dl_debug, "help", 4) == 0 @@ -956,6 +963,7 @@ process_envvars (enum mode *modep, int *lazyp) char *envline; enum mode mode = normal; int bind_now = 0; + char *debug_output = NULL; /* This is the default place for profiling data file. */ _dl_profile_output = "/var/tmp"; @@ -984,6 +992,16 @@ process_envvars (enum mode *modep, int *lazyp) if (result < 0) continue; + /* Where to place the profiling data file. */ + result = strncmp (&envline[3], "DEBUG_OUTPUT=", 13); + if (result == 0) + { + debug_output = &envline[16]; + continue; + } + if (result < 0) + continue; + /* Which shared object shall be profiled. */ result = strncmp (&envline[3], "PROFILE=", 8); if (result == 0) @@ -1038,6 +1056,18 @@ process_envvars (enum mode *modep, int *lazyp) } } + /* If we have to run the dynamic linker in debugging mode and the + LD_DEBUG_OUTPUT environment variable is given, we write the debug + messages to this file. */ + if (any_debug && debug_output != NULL) + { + _dl_debug_fd = __open (debug_output, O_WRONLY | O_APPEND | O_CREAT, + 0666); + if (_dl_debug_fd == -1) + /* We use standard output if opening the file failed. */ + _dl_debug_fd = STDOUT_FILENO; + } + /* LAZY is determined by the environment variable LD_WARN and LD_BIND_NOW if we trace the binary. */ if (mode == trace) |