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1998-03-06 17:04  Ulrich Drepper  <drepper@cygnus.com>

	* libc.map: Add _dl_debug_impcalls, _dl_debug_fd, _dl_sysdep_output,
	__libc_start_main.
	* csu/Makefile (routines): Add libc-start.
	* elf/dl-error.c: Remove declaration of _dl_argv.  Include <unitsd.h>.
	* elf/dl-lookup.c: Likewise.
	* elf/dl-version.c: Likewise.
	* sysdeps/i386/dl-machine.h: Likewise.
	* elf/link.h: Declare _dl_argv, _dl_debug_fd.
	Declare _dl_sysdep_output.  Make _dl_sysdep_fatal, _dl_sysdep_error and
	_dl_sysdep_message macros which use _dl_sysdep_output.
	* elf/dl-fini.c: Write out which destructor is called while debugging.
	* elf/dl-init.c: Likewise for constructor.
	* elf/dl-load.c: Use _dl_debug_message instead of _dl_sysdep_message.
	* elf/dl-misc.c: Remove _dl_sysdep_fatal, _dl_sysdep_error and
	_dl_sysdep_message.  Add _dl_sysdep_output.
	* elf/rtld.c: Recognize LD_DEBUG_OUTPUT.  Set _dl_debug_fd if
	this file can be opened.
	For LD_DEBUG=libs also set _dl_debug_impcalls.
	* sysdeps/generic/dl-cache.c: Include unistd.h.
	* sysdeps/generic/libc-start.c: New file.
	* sysdeps/i386/elf/start.S: Don't call main directly, call
	* sysdeps/unix/sysv/linux/libc-start.c: New file.
	__libc_start_main instead.

	* elf/Makefile ($(objpfx)ld.so): Add $(load-map-file) as dependency.
This commit is contained in:
Ulrich Drepper
1998-03-06 17:21:43 +00:00
parent 4b7814cf8a
commit 7dea968e78
18 changed files with 185 additions and 70 deletions
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30
elf/rtld.c
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@@ -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)