diff options
| -rw-r--r-- | ChangeLog | 28 | ||||
| -rw-r--r-- | csu/Makefile | 2 | ||||
| -rw-r--r-- | elf/Makefile | 2 | ||||
| -rw-r--r-- | elf/dl-error.c | 5 | ||||
| -rw-r--r-- | elf/dl-fini.c | 12 | ||||
| -rw-r--r-- | elf/dl-init.c | 9 | ||||
| -rw-r--r-- | elf/dl-load.c | 11 | ||||
| -rw-r--r-- | elf/dl-lookup.c | 1 | ||||
| -rw-r--r-- | elf/dl-misc.c | 38 | ||||
| -rw-r--r-- | elf/dl-version.c | 5 | ||||
| -rw-r--r-- | elf/link.h | 33 | ||||
| -rw-r--r-- | elf/rtld.c | 30 | ||||
| -rw-r--r-- | libc.map | 6 | ||||
| -rw-r--r-- | sysdeps/generic/dl-cache.c | 2 | ||||
| -rw-r--r-- | sysdeps/generic/libc-start.c | 24 | ||||
| -rw-r--r-- | sysdeps/i386/dl-machine.h | 4 | ||||
| -rw-r--r-- | sysdeps/i386/elf/start.S | 8 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/libc-start.c | 31 |
18 files changed, 183 insertions, 68 deletions
@@ -1,3 +1,31 @@ +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. + 1998-03-06 Ulrich Drepper <drepper@cygnus.com> * nss/nsswitch.c (__nss_nscd_not_available): Removed. diff --git a/csu/Makefile b/csu/Makefile index 37ce7cc..7482caf 100644 --- a/csu/Makefile +++ b/csu/Makefile @@ -27,7 +27,7 @@ subdir := csu -routines = init-first +routines = init-first libc-start csu-dummies = $(filter-out $(start-installed-name),crt1.o Mcrt1.o) extra-objs = start.o gmon-start.o \ $(start-installed-name) g$(start-installed-name) \ diff --git a/elf/Makefile b/elf/Makefile index fc74fa4..19c5ef8 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -109,7 +109,7 @@ $(rtld-ldscript): $(rtld-ldscript-in) $(rtld-parms) -e 's#@@rtld-base@@#$(rtld-base)#' $< >$@ endif -$(objpfx)ld.so: $(objpfx)librtld.os $(addprefix $(objpfx),$(rtld-ldscript)) +$(objpfx)ld.so: $(objpfx)librtld.os $(addprefix $(objpfx),$(rtld-ldscript)) $(load-map-file) $(rtld-link) -Wl,-soname=$(rtld-installed-name) define rtld-link diff --git a/elf/dl-error.c b/elf/dl-error.c index 3cfe48f..6945ea8 100644 --- a/elf/dl-error.c +++ b/elf/dl-error.c @@ -1,5 +1,5 @@ /* Error handling for runtime dynamic linker. - Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc. + Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -17,11 +17,11 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#include <stddef.h> #include <link.h> #include <setjmp.h> #include <stdlib.h> #include <string.h> +#include <unistd.h> /* This is the internal function we use to generate the error string. */ extern char *_strerror_internal __P ((int, char *, size_t)); @@ -76,7 +76,6 @@ _dl_signal_error (int errcode, else { /* Lossage while resolving the program's own symbols is always fatal. */ - extern char **_dl_argv; /* Set in rtld.c at startup. */ char buffer[1024]; _dl_sysdep_fatal (_dl_argv[0] ?: "<program name unknown>", ": error in loading shared libraries: ", diff --git a/elf/dl-fini.c b/elf/dl-fini.c index 5af43d3..9dcd87a 100644 --- a/elf/dl-fini.c +++ b/elf/dl-fini.c @@ -1,5 +1,5 @@ /* Call the termination functions of loaded shared objects. - Copyright (C) 1995, 1996 Free Software Foundation, Inc. + Copyright (C) 1995, 1996, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -29,7 +29,15 @@ _dl_fini (void) { if (l->l_info[DT_FINI] && !(l->l_name[0] == '\0' && l->l_type == lt_executable)) - (*(void (*) (void)) (l->l_addr + l->l_info[DT_FINI]->d_un.d_ptr)) (); + { + /* When debugging print a message first. */ + if (_dl_debug_impcalls) + _dl_debug_message ("\n\tcalling fini: ", + l->l_name[0] ? l->l_name : _dl_argv[0], + "\n", NULL); + + (*(void (*) (void)) (l->l_addr + l->l_info[DT_FINI]->d_un.d_ptr)) (); + } /* Make sure nothing happens if we are called twice. */ l->l_init_called = 0; } diff --git a/elf/dl-init.c b/elf/dl-init.c index 30d0016..6fcac75 100644 --- a/elf/dl-init.c +++ b/elf/dl-init.c @@ -1,5 +1,5 @@ /* Return the next shared object initializer function not yet run. - Copyright (C) 1995, 1996 Free Software Foundation, Inc. + Copyright (C) 1995, 1996, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -57,6 +57,13 @@ _dl_init_next (struct link_map *map) { /* Run this object's initializer. */ l->l_init_running = 1; + + /* Print a debug message if wanted. */ + if (_dl_debug_impcalls) + _dl_debug_message ("\tcalling init: ", + l->l_name[0] ? l->l_name : _dl_argv[0], + "\n\n", NULL); + return l->l_addr + l->l_info[DT_INIT]->d_un.d_ptr; } diff --git a/elf/dl-load.c b/elf/dl-load.c index 003754b..7137344 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -92,9 +92,6 @@ ELF_PREFERRED_ADDRESS_DATA; size_t _dl_pagesize; -/* Arguments passed to the dynamic linker. */ -extern char **_dl_argv; - extern const char *_dl_platform; extern size_t _dl_platformlen; @@ -879,7 +876,7 @@ open_path (const char *name, size_t namelen, int preloaded, /* Print name we try if this is wanted. */ if (_dl_debug_libs) - _dl_sysdep_message ("\t trying file=", buf, "\n", NULL); + _dl_debug_message ("\t trying file=", buf, "\n", NULL); fd = __open (buf, O_RDONLY); if (this_dir->machdirstatus == unknown) @@ -934,7 +931,7 @@ open_path (const char *name, size_t namelen, int preloaded, /* Print name we try if this is wanted. */ if (_dl_debug_libs) - _dl_sysdep_message ("\t trying file=", buf, "\n", NULL); + _dl_debug_message ("\t trying file=", buf, "\n", NULL); fd = __open (buf, O_RDONLY); if (this_dir->dirstatus == unknown) @@ -1053,7 +1050,7 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded, size_t namelen = strlen (name) + 1; if (_dl_debug_libs) - _dl_sysdep_message ("\tfind library=", name, "; searching\n", NULL); + _dl_debug_message ("\tfind library=", name, "; searching\n", NULL); fd = -1; @@ -1117,7 +1114,7 @@ _dl_map_object (struct link_map *loader, const char *name, int preloaded, /* Add another newline when we a tracing the library loading. */ if (_dl_debug_libs) - _dl_sysdep_message ("\n", NULL); + _dl_debug_message ("\n", NULL); } else { diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c index 6c1c04b..19e6f05 100644 --- a/elf/dl-lookup.c +++ b/elf/dl-lookup.c @@ -280,7 +280,6 @@ _dl_lookup_versioned_symbol (const char *undef_name, const ElfW(Sym) **ref, const struct r_found_version *version, int reloc_type) { - extern char **_dl_argv; const unsigned long int hash = _dl_elf_hash (undef_name); struct sym_val current_value = { 0, NULL }; struct link_map **scope; diff --git a/elf/dl-misc.c b/elf/dl-misc.c index 86a0c63..9028852 100644 --- a/elf/dl-misc.c +++ b/elf/dl-misc.c @@ -74,42 +74,12 @@ _dl_sysdep_read_whole_file (const char *file, size_t *sizep, int prot) } -void -_dl_sysdep_fatal (const char *msg, ...) -{ - va_list ap; - - va_start (ap, msg); - do - { - size_t len = strlen (msg); - __write (STDERR_FILENO, msg, len); - msg = va_arg (ap, const char *); - } while (msg); - va_end (ap); - - _exit (127); -} - - -void -_dl_sysdep_error (const char *msg, ...) -{ - va_list ap; - - va_start (ap, msg); - do - { - size_t len = strlen (msg); - __write (STDERR_FILENO, msg, len); - msg = va_arg (ap, const char *); - } while (msg); - va_end (ap); -} +/* Descriptor to write debug messages to. */ +int _dl_debug_fd; void -_dl_sysdep_message (const char *msg, ...) +_dl_sysdep_output (int fd, const char *msg, ...) { va_list ap; @@ -117,7 +87,7 @@ _dl_sysdep_message (const char *msg, ...) do { size_t len = strlen (msg); - __write (STDOUT_FILENO, msg, len); + __write (fd, msg, len); msg = va_arg (ap, const char *); } while (msg); va_end (ap); diff --git a/elf/dl-version.c b/elf/dl-version.c index 0f98dd0..a4f77f5 100644 --- a/elf/dl-version.c +++ b/elf/dl-version.c @@ -1,5 +1,5 @@ /* Handle symbol and library versioning. - Copyright (C) 1997 Free Software Foundation, Inc. + Copyright (C) 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -28,9 +28,6 @@ #include <stdio-common/_itoa.h> -/* Set in rtld.c at startup. */ -extern char **_dl_argv; - #define VERSTAG(tag) (DT_NUM + DT_PROCNUM + DT_VERSIONTAGIDX (tag)) @@ -231,6 +231,9 @@ typedef void (*receiver_fct) (int, const char *, const char *); user interface to run-time dynamic linking. */ +/* Parameters passed to te dynamic linker. */ +extern char **_dl_argv; + /* Cached value of `getpagesize ()'. */ extern size_t _dl_pagesize; @@ -244,26 +247,48 @@ extern struct link_map *_dl_profile_map; /* If nonzero the appropriate debug information if printed. */ extern int _dl_debug_libs; +extern int _dl_debug_impcalls; + +/* File deccriptor to write debug messages to. */ +extern int _dl_debug_fd; /* OS-dependent function to open the zero-fill device. */ extern int _dl_sysdep_open_zero_fill (void); /* dl-sysdep.c */ +/* OS-dependent function to write a message on the specified + descriptor FD. All arguments are `const char *'; args until a null + pointer are concatenated to form the message to print. */ +extern void _dl_sysdep_output (int fd, const char *string, ...); + +/* OS-dependent function to write a debug message on the specified + descriptor for this. All arguments are `const char *'; args until + a null pointer are concatenated to form the message to print. */ +#define _dl_debug_message(string, args...) \ + _dl_sysdep_output (_dl_debug_fd, string, ##args) + /* OS-dependent function to write a message on the standard output. All arguments are `const char *'; args until a null pointer are concatenated to form the message to print. */ -extern void _dl_sysdep_message (const char *string, ...); +#define _dl_sysdep_message(string, args...) \ + _dl_sysdep_output (STDOUT_FILENO, string, ##args) /* OS-dependent function to write a message on the standard error. All arguments are `const char *'; args until a null pointer are concatenated to form the message to print. */ -extern void _dl_sysdep_error (const char *string, ...); +#define _dl_sysdep_error(string, args...) \ + _dl_sysdep_output (STDERR_FILENO, string, ##args) /* OS-dependent function to give a fatal error message and exit when the dynamic linker fails before the program is fully linked. All arguments are `const char *'; args until a null pointer are concatenated to form the message to print. */ -extern void _dl_sysdep_fatal (const char *string, ...) - __attribute__ ((__noreturn__)); +#define _dl_sysdep_fatal(string, args...) \ + do \ + { \ + _dl_sysdep_output (STDERR_FILENO, string, ##args); \ + _exit (127); \ + } \ + while (1) /* Nonzero if the program should be "secure" (i.e. it's setuid or somesuch). This tells the dynamic linker to ignore environment variables. */ @@ -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) @@ -11,7 +11,7 @@ GLIBC_2.0 { __collate_element_strings; __collate_symbol_classes; __collate_symbol_hash; __collate_symbol_strings; _obstack; - __progname_full; __progname; + __progname_full; __progname; _dl_debug_impcalls; _dl_debug_fd; _IO_list_all; _IO_stderr_; _IO_stdin_; _IO_stdout_; @@ -21,7 +21,7 @@ GLIBC_2.0 { .div; .mul; .rem; .udiv; .umul; .urem; # helper functions - __errno_location; __libc_init_first; __h_errno_location; + __errno_location; __libc_init_first; __h_errno_location; __libc_start_main; # functions with special/multiple interfaces __sigsetjmp; _setjmp; __sigaddset; __sigdelset; __sigismember; @@ -98,7 +98,7 @@ GLIBC_2.0 { __vsscanf; __vfscanf; __vsnprintf; _rpc_dtablesize; _null_auth; _seterr_reply; __res_randomid; __getpid; - __strcasecmp; __write; _strerror_internal; + __strcasecmp; __write; _strerror_internal; _dl_sysdep_output; # Exception handling support functions from libgcc __register_frame; __register_frame_table; __deregister_frame; diff --git a/sysdeps/generic/dl-cache.c b/sysdeps/generic/dl-cache.c index 43a987a..2a2be57 100644 --- a/sysdeps/generic/dl-cache.c +++ b/sysdeps/generic/dl-cache.c @@ -18,7 +18,7 @@ Boston, MA 02111-1307, USA. */ #include <link.h> -#include <stddef.h> +#include <unistd.h> #include <sys/mman.h> /* System-dependent function to read a file's whole contents diff --git a/sysdeps/generic/libc-start.c b/sysdeps/generic/libc-start.c new file mode 100644 index 0000000..1241988 --- /dev/null +++ b/sysdeps/generic/libc-start.c @@ -0,0 +1,24 @@ +/* Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +int +__libc_start_main (int (*main) (int, char **, char **), int argc, + char **argv, char **envp) +{ + return (*main) (argc, argv, envp); +} diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h index 2aaa5b7..394188d 100644 --- a/sysdeps/i386/dl-machine.h +++ b/sysdeps/i386/dl-machine.h @@ -1,5 +1,5 @@ /* Machine-dependent ELF dynamic relocation inline functions. i386 version. - Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc. + Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -302,8 +302,6 @@ elf_machine_plt_value (struct link_map *map, const Elf32_Rel *reloc, #ifdef RESOLVE -extern char **_dl_argv; - /* Perform the relocation specified by RELOC and SYM (which is fully resolved). MAP is the object containing the reloc. */ diff --git a/sysdeps/i386/elf/start.S b/sysdeps/i386/elf/start.S index 7416c0a..e8ed204 100644 --- a/sysdeps/i386/elf/start.S +++ b/sysdeps/i386/elf/start.S @@ -1,5 +1,5 @@ /* Startup code compliant to the ELF i386 ABI. - Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc. + Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -88,9 +88,11 @@ _start: call atexit popl %eax - /* Call the user's main function, and exit with its value. */ - call main + /* Call the user's main function, and exit with its value. + But let the libc call main. */ + movl $main, %eax pushl %eax + call __libc_start_main call exit hlt /* Crash if somehow `exit' does return. */ diff --git a/sysdeps/unix/sysv/linux/libc-start.c b/sysdeps/unix/sysv/linux/libc-start.c new file mode 100644 index 0000000..f142195 --- /dev/null +++ b/sysdeps/unix/sysv/linux/libc-start.c @@ -0,0 +1,31 @@ +/* Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <link.h> + +int +__libc_start_main (int (*main) (int, char **, char **), int argc, + char **argv, char **envp) +{ +#ifdef PIC + if (_dl_debug_impcalls) + _dl_debug_message ("\ttransferring control: ", argv[0], "\n\n", NULL); +#endif + + return (*main) (argc, argv, envp); +} |