diff options
Diffstat (limited to 'elf/dl-error.c')
| -rw-r--r-- | elf/dl-error.c | 41 |
1 files changed, 30 insertions, 11 deletions
diff --git a/elf/dl-error.c b/elf/dl-error.c index 0ef76c8..79ebaaf 100644 --- a/elf/dl-error.c +++ b/elf/dl-error.c @@ -1,5 +1,5 @@ /* Error handling for runtime dynamic linker. - Copyright (C) 1995-2002,2004 Free Software Foundation, Inc. + Copyright (C) 1995-2002,2004,2005 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 @@ -19,6 +19,7 @@ #include <libintl.h> #include <setjmp.h> +#include <stdbool.h> #include <stdlib.h> #include <string.h> #include <unistd.h> @@ -30,6 +31,8 @@ struct catch { const char *objname; /* Object/File name. */ const char *errstring; /* Error detail filled in here. */ + bool malloced; /* Nonzero if the string is malloced + by the libc malloc. */ jmp_buf env; /* longjmp here on error. */ }; @@ -44,8 +47,7 @@ struct catch /* This message we return as a last resort. We define the string in a variable since we have to avoid freeing it and so have to enable a pointer comparison. See below and in dlfcn/dlerror.c. */ -const char _dl_out_of_memory[] = "out of memory"; -INTVARDEF(_dl_out_of_memory) +static const char _dl_out_of_memory[] = "out of memory"; /* This points to a function which is called when an continuable error is @@ -87,17 +89,31 @@ _dl_signal_error (int errcode, const char *objname, const char *occation, lcatch->errstring = (char *) malloc (len_objname + len_errstring); if (lcatch->errstring != NULL) - /* Make a copy of the object file name and the error string. */ - lcatch->objname = memcpy (__mempcpy ((char *) lcatch->errstring, - errstring, len_errstring), - objname, len_objname); + { + /* Make a copy of the object file name and the error string. */ + lcatch->objname = memcpy (__mempcpy ((char *) lcatch->errstring, + errstring, len_errstring), + objname, len_objname); + + /* If the main executable is relocated it means the libc's malloc + is used. */ +#ifdef SHARED + lcatch->malloced = (GL(dl_ns)[LM_ID_BASE]._ns_loaded != NULL + && (GL(dl_ns)[LM_ID_BASE]._ns_loaded->l_relocated + != 0)); +#else + lcatch->malloced = true; +#endif + } else { /* This is better than nothing. */ lcatch->objname = ""; - lcatch->errstring = INTUSE(_dl_out_of_memory); + lcatch->errstring = _dl_out_of_memory; + lcatch->malloced = false; } - longjmp (lcatch->env, errcode ?: -1); + /* We do not restore the signal mask because none was saved. */ + __longjmp (lcatch->env[0].__jmpbuf, errcode ?: -1); } else { @@ -140,7 +156,7 @@ _dl_signal_cerror (int errcode, const char *objname, const char *occation, int internal_function _dl_catch_error (const char **objname, const char **errstring, - void (*operate) (void *), void *args) + bool *mallocedp, void (*operate) (void *), void *args) { int errcode; struct catch *volatile old; @@ -154,7 +170,8 @@ _dl_catch_error (const char **objname, const char **errstring, struct catch **const catchp = &CATCH_HOOK; old = *catchp; - errcode = setjmp (c.env); + /* Do not save the signal mask. */ + errcode = __sigsetjmp (c.env, 0); if (__builtin_expect (errcode, 0) == 0) { *catchp = &c; @@ -162,6 +179,7 @@ _dl_catch_error (const char **objname, const char **errstring, *catchp = old; *objname = NULL; *errstring = NULL; + *mallocedp = false; return 0; } @@ -169,6 +187,7 @@ _dl_catch_error (const char **objname, const char **errstring, *catchp = old; *objname = c.objname; *errstring = c.errstring; + *mallocedp = c.malloced; return errcode == -1 ? 0 : errcode; } |