diff options
| -rw-r--r-- | ChangeLog | 44 | ||||
| -rw-r--r-- | dlfcn/Makefile | 18 | ||||
| -rw-r--r-- | dlfcn/Versions | 3 | ||||
| -rw-r--r-- | dlfcn/dladdr.c | 21 | ||||
| -rw-r--r-- | dlfcn/dladdr1.c | 21 | ||||
| -rw-r--r-- | dlfcn/dlclose.c | 24 | ||||
| -rw-r--r-- | dlfcn/dlerror.c | 52 | ||||
| -rw-r--r-- | dlfcn/dlinfo.c | 28 | ||||
| -rw-r--r-- | dlfcn/dlmopen.c | 39 | ||||
| -rw-r--r-- | dlfcn/dlopen.c | 48 | ||||
| -rw-r--r-- | dlfcn/dlopenold.c | 3 | ||||
| -rw-r--r-- | dlfcn/dlsym.c | 23 | ||||
| -rw-r--r-- | dlfcn/dlvsym.c | 25 | ||||
| -rw-r--r-- | dlfcn/modstatic2.c | 228 | ||||
| -rw-r--r-- | dlfcn/sdladdr.c | 1 | ||||
| -rw-r--r-- | dlfcn/sdladdr1.c | 1 | ||||
| -rw-r--r-- | dlfcn/sdlclose.c | 1 | ||||
| -rw-r--r-- | dlfcn/sdlerror.c | 1 | ||||
| -rw-r--r-- | dlfcn/sdlinfo.c | 1 | ||||
| -rw-r--r-- | dlfcn/sdlmopen.c | 1 | ||||
| -rw-r--r-- | dlfcn/sdlopen.c | 1 | ||||
| -rw-r--r-- | dlfcn/sdlsym.c | 1 | ||||
| -rw-r--r-- | dlfcn/sdlvsym.c | 1 | ||||
| -rw-r--r-- | dlfcn/tststatic2.c | 166 | ||||
| -rw-r--r-- | include/dlfcn.h | 60 | ||||
| -rw-r--r-- | include/libc-symbols.h | 18 | ||||
| -rw-r--r-- | malloc/arena.c | 11 |
27 files changed, 803 insertions, 38 deletions
@@ -1,3 +1,47 @@ +2004-10-18 Jakub Jelinek <jakub@redhat.com> + + * elf/dl-libc.c (__libc_dlsym_private, __libc_register_dl_open_hook): + New functions. + (__libc_dlopen_mode): Call __libc_register_dl_open_hook and + __libc_register_dlfcn_hook. + * dlfcn/Makefile (routines, elide-routines.os): Set. + Add rules to build and test tststatic2. + * dlfcn/tststatic2.c: New test. + * dlfcn/modstatic2.c: New test module. + * dlfcn/dladdr.c: Call _dlfcn_hook from libdl.so if not NULL. + Define __ prefixed routine in libc.a and in libdl.a just call it. + * dlfcn/dladdr1.c: Likewise. + * dlfcn/dlclose.c: Likewise. + * dlfcn/dlerror.c: Likewise. + * dlfcn/dlinfo.c: Likewise. + * dlfcn/dlmopen.c: Likewise. + * dlfcn/dlopen.c: Likewise. + * dlfcn/dlopenold.c: Likewise. + * dlfcn/dlsym.c: Likewise. + * dlfcn/dlvsym.c: Likewise. + * dlfcn/sdladdr.c: New file. + * dlfcn/sdladdr1.c: New file. + * dlfcn/sdlclose.c: New file. + * dlfcn/sdlerror.c: New file. + * dlfcn/sdlinfo.c: New file. + * dlfcn/sdlopen.c: New file. + * dlfcn/sdlsym.c: New file. + * dlfcn/sdlvsym.c: New file. + * dlfcn/Versions (libdl): Export _dlfcn_hook@GLIBC_PRIVATE. + * include/dlfcn.h (DL_CALLER_DECL, DL_CALLER RETURN_ADDRESS): Define. + (struct dlfcn_hook): New type. + (_dlfcn_hook): New extern decl. + (__dlopen, __dlclose, __dlsym, __dlerror, __dladdr, __dladdr1, + __dlinfo, __dlmopen, __libc_dlsym_private, + __libc_register_dl_open_hook, __libc_register_dlfcn_hook): New + prototypes. + (__dlvsym): Use DL_CALLER_DECL. + * include/libc-symbols.h: Define libdl_hidden_proto and friends. + + * malloc/arena.c (_dl_open_hook): Extern decl. + (ptmalloc_init): Don't call _dl_addr when dlopened from statically + linked programs but don't use brk for them either. + 2004-10-18 Roland McGrath <roland@redhat.com> * dlfcn/bug-dlsym1.c (main): Remove bogus setenv call. diff --git a/dlfcn/Makefile b/dlfcn/Makefile index 4330a8a..ed20ae5 100644 --- a/dlfcn/Makefile +++ b/dlfcn/Makefile @@ -21,9 +21,11 @@ headers := bits/dlfcn.h dlfcn.h extra-libs := libdl libdl-routines := dlopen dlclose dlsym dlvsym dlerror dladdr dladdr1 dlinfo \ dlmopen +routines := $(patsubst %,s%,$(libdl-routines)) +elide-routines.os := $(routines) distribute := dlopenold.c glreflib1.c glreflib2.c failtestmod.c \ defaultmod1.c defaultmod2.c errmsg1mod.c modatexit.c \ - modcxaatexit.c modstatic.c \ + modcxaatexit.c modstatic.c modstatic2.c \ bug-dlsym1-lib1.c bug-dlsym1-lib2.c extra-libs-others := libdl @@ -51,10 +53,11 @@ glreflib2.so-no-z-defs = yes errmsg1mod.so-no-z-defs = yes ifeq (yesyesyes,$(build-static)$(build-shared)$(elf)) -tests += tststatic -tests-static += tststatic -modules-names += modstatic +tests += tststatic tststatic2 +tests-static += tststatic tststatic2 +modules-names += modstatic modstatic2 tststatic-ENV = LD_LIBRARY_PATH=$(objpfx):$(common-objpfx):$(common-objpfx)elf +tststatic2-ENV = LD_LIBRARY_PATH=$(objpfx):$(common-objpfx):$(common-objpfx)elf endif extra-objs += $(modules-names:=.os) @@ -106,7 +109,12 @@ $(objpfx)modatexit.so: $(common-objpfx)libc.so $(common-objpfx)libc_nonshared.a $(objpfx)tststatic: $(objpfx)libdl.a $(objpfx)tststatic.out: $(objpfx)tststatic $(objpfx)modstatic.so -$(objpfx)modstatic.so: $(common-objpfx)libc.so $(common-objpfx)libc_nonshared.a +$(objpfx)tststatic2: $(objpfx)libdl.a +$(objpfx)tststatic2.out: $(objpfx)tststatic2 $(objpfx)modstatic.so \ + $(objpfx)modstatic2.so + +$(objpfx)modstatic2.so: $(libdl) $(common-objpfx)libc.so \ + $(common-objpfx)libc_nonshared.a $(objpfx)bug-dlopen1: $(libdl) diff --git a/dlfcn/Versions b/dlfcn/Versions index 6a41c23..97902f0 100644 --- a/dlfcn/Versions +++ b/dlfcn/Versions @@ -11,4 +11,7 @@ libdl { GLIBC_2.3.4 { dlmopen; } + GLIBC_PRIVATE { + _dlfcn_hook; + } } diff --git a/dlfcn/dladdr.c b/dlfcn/dladdr.c index b5490e5..d0462b9 100644 --- a/dlfcn/dladdr.c +++ b/dlfcn/dladdr.c @@ -1,5 +1,6 @@ /* Locate the shared object symbol nearest a given address. - Copyright (C) 1996, 1997, 1998, 1999, 2003 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998, 1999, 2003, 2004 + 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 @@ -19,8 +20,26 @@ #include <dlfcn.h> +#if !defined SHARED && defined IS_IN_libdl + int dladdr (const void *address, Dl_info *info) { + return __dladdr (address, info); +} + +#else + +int +__dladdr (const void *address, Dl_info *info) +{ +# ifdef SHARED + if (__builtin_expect (_dlfcn_hook != NULL, 0)) + return _dlfcn_hook->dladdr (address, info); +# endif return _dl_addr (address, info, NULL, NULL); } +# ifdef SHARED +strong_alias (__dladdr, dladdr) +# endif +#endif diff --git a/dlfcn/dladdr1.c b/dlfcn/dladdr1.c index 51b53b5..0f2b603 100644 --- a/dlfcn/dladdr1.c +++ b/dlfcn/dladdr1.c @@ -1,5 +1,5 @@ /* Locate the shared object symbol nearest a given address. - Copyright (C) 2003 Free Software Foundation, Inc. + Copyright (C) 2003, 2004 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 @@ -19,9 +19,24 @@ #include <dlfcn.h> +#if !defined SHARED && defined IS_IN_libdl + int dladdr1 (const void *address, Dl_info *info, void **extra, int flags) { + return __dladdr1 (address, info, extra, flags); +} + +#else + +int +__dladdr1 (const void *address, Dl_info *info, void **extra, int flags) +{ +# ifdef SHARED + if (__builtin_expect (_dlfcn_hook != NULL, 0)) + return _dlfcn_hook->dladdr1 (address, info, extra, flags); +# endif + switch (flags) { default: /* Make this an error? */ @@ -33,3 +48,7 @@ dladdr1 (const void *address, Dl_info *info, void **extra, int flags) return _dl_addr (address, info, (struct link_map **) extra, NULL); } } +# ifdef SHARED +strong_alias (__dladdr1, dladdr1) +# endif +#endif diff --git a/dlfcn/dlclose.c b/dlfcn/dlclose.c index 046e6d4..3ddedcf 100644 --- a/dlfcn/dlclose.c +++ b/dlfcn/dlclose.c @@ -1,5 +1,6 @@ /* Close a handle opened by `dlopen'. - Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc. + Copyright (C) 1995, 1996, 1997, 1998, 1999, 2004 + 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 +20,16 @@ #include <dlfcn.h> +#if !defined SHARED && defined IS_IN_libdl + +int +dlclose (void *handle) +{ + return __dlclose (handle); +} + +#else + static void dlclose_doit (void *handle) { @@ -26,7 +37,16 @@ dlclose_doit (void *handle) } int -dlclose (void *handle) +__dlclose (void *handle) { +# ifdef SHARED + if (__builtin_expect (_dlfcn_hook != NULL, 0)) + return _dlfcn_hook->dlclose (handle); +# endif + return _dlerror_run (dlclose_doit, handle) ? -1 : 0; } +# ifdef SHARED +strong_alias (__dlclose, dlclose) +# endif +#endif diff --git a/dlfcn/dlerror.c b/dlfcn/dlerror.c index 1cde04b..8789f4f 100644 --- a/dlfcn/dlerror.c +++ b/dlfcn/dlerror.c @@ -25,6 +25,16 @@ #include <bits/libc-lock.h> #include <ldsodefs.h> +#if !defined SHARED && defined IS_IN_libdl + +char * +dlerror (void) +{ + return __dlerror (); +} + +#else + /* Type for storing results of dynamic loading actions. */ struct dl_action_result { @@ -46,11 +56,16 @@ static void free_key_mem (void *mem); char * -dlerror (void) +__dlerror (void) { char *buf = NULL; struct dl_action_result *result; +# ifdef SHARED + if (__builtin_expect (_dlfcn_hook != NULL, 0)) + return _dlfcn_hook->dlerror (); +# endif + /* If we have not yet initialized the buffer do it now. */ __libc_once (once, init); @@ -99,6 +114,9 @@ dlerror (void) return buf; } +# ifdef SHARED +strong_alias (__dlerror, dlerror) +# endif int internal_function @@ -185,3 +203,35 @@ free_key_mem (void *mem) free (mem); __libc_setspecific (key, NULL); } + +# ifdef SHARED + +struct dlfcn_hook *_dlfcn_hook __attribute__((nocommon)); +libdl_hidden_data_def (_dlfcn_hook) + +# else + +static struct dlfcn_hook _dlfcn_hooks = + { + .dlopen = __dlopen, + .dlclose = __dlclose, + .dlsym = __dlsym, + .dlvsym = __dlvsym, + .dlerror = __dlerror, + .dladdr = __dladdr, + .dladdr1 = __dladdr1, + .dlinfo = __dlinfo, + .dlmopen = __dlmopen + }; + +void +__libc_register_dlfcn_hook (struct link_map *map) +{ + struct dlfcn_hook **hook; + + hook = (struct dlfcn_hook **) __libc_dlsym_private (map, "_dlfcn_hook"); + if (hook != NULL) + *hook = &_dlfcn_hooks; +} +# endif +#endif diff --git a/dlfcn/dlinfo.c b/dlfcn/dlinfo.c index d54a132..44af55a 100644 --- a/dlfcn/dlinfo.c +++ b/dlfcn/dlinfo.c @@ -22,6 +22,16 @@ #include <ldsodefs.h> #include <libintl.h> +#if !defined SHARED && defined IS_IN_libdl + +int +dlinfo (void *handle, int request, void *arg) +{ + return __dlinfo (handle, request, arg, RETURN_ADDRESS (0)); +} + +#else + struct dlinfo_args { ElfW(Addr) caller; @@ -36,7 +46,7 @@ dlinfo_doit (void *argsblock) struct dlinfo_args *const args = argsblock; struct link_map *l = args->handle; -#if 0 +# if 0 if (args->handle == RTLD_SELF) { Lmid_t nsid; @@ -53,7 +63,7 @@ dlinfo_doit (void *argsblock) GLRO(dl_signal_error) (0, NULL, NULL, N_("\ RTLD_SELF used in code not dynamically loaded")); } -#endif +# endif switch (args->request) { @@ -84,9 +94,19 @@ RTLD_SELF used in code not dynamically loaded")); } int -dlinfo (void *handle, int request, void *arg) +__dlinfo (void *handle, int request, void *arg DL_CALLER_DECL) { - struct dlinfo_args args = { (ElfW(Addr)) RETURN_ADDRESS (0), +# ifdef SHARED + if (__builtin_expect (_dlfcn_hook != NULL, 0)) + return _dlfcn_hook->dlinfo (handle, request, arg, + DL_CALLER); +# endif + + struct dlinfo_args args = { (ElfW(Addr)) DL_CALLER, handle, request, arg }; return _dlerror_run (&dlinfo_doit, &args) ? -1 : 0; } +# ifdef SHARED +strong_alias (__dlinfo, dlinfo) +# endif +#endif diff --git a/dlfcn/dlmopen.c b/dlfcn/dlmopen.c index fb2a50b..5fd6543 100644 --- a/dlfcn/dlmopen.c +++ b/dlfcn/dlmopen.c @@ -23,6 +23,17 @@ #include <stddef.h> #include <ldsodefs.h> +#if !defined SHARED && defined IS_IN_libdl + +void * +dlmopen (Lmid_t nsid, const char *file, int mode) +{ + return __dlmopen (nsid, file, mode, RETURN_ADDRESS (0)); +} +static_link_warning (dlmopen) + +#else + struct dlmopen_args { /* Namespace ID. */ @@ -43,11 +54,11 @@ dlmopen_doit (void *a) /* Non-shared code has no support for multiple namespaces. */ if (args->nsid != LM_ID_BASE) -#ifdef SHARED +# ifdef SHARED /* If trying to open the link map for the main executable the namespace must be the main one. */ if (args->file == NULL) -#endif +# endif GLRO(dl_signal_error) (EINVAL, NULL, NULL, N_("invalid namespace")); args->new = _dl_open (args->file ?: "", args->mode | __RTLD_DLOPEN, @@ -56,14 +67,32 @@ dlmopen_doit (void *a) void * -dlmopen (Lmid_t nsid, const char *file, int mode) +__dlmopen (Lmid_t nsid, const char *file, int mode DL_CALLER_DECL) { +# ifdef SHARED + if (__builtin_expect (_dlfcn_hook != NULL, 0)) + return _dlfcn_hook->dlmopen (nsid, file, mode, RETURN_ADDRESS (0)); +# endif + struct dlmopen_args args; args.nsid = nsid; args.file = file; args.mode = mode; - args.caller = RETURN_ADDRESS (0); + args.caller = DL_CALLER; +# ifdef SHARED return _dlerror_run (dlmopen_doit, &args) ? NULL : args.new; +# else + if (_dlerror_run (dlmopen_doit, &args)) + return NULL; + + __libc_register_dl_open_hook ((struct link_map *) args.new); + __libc_register_dlfcn_hook ((struct link_map *) args.new); + + return args.new; +# endif } -static_link_warning (dlmopen) +# ifdef SHARED +strong_alias (__dlmopen, dlmopen) +# endif +#endif diff --git a/dlfcn/dlopen.c b/dlfcn/dlopen.c index cfd7963..6381ffc 100644 --- a/dlfcn/dlopen.c +++ b/dlfcn/dlopen.c @@ -20,6 +20,17 @@ #include <dlfcn.h> #include <stddef.h> +#if !defined SHARED && defined IS_IN_libdl + +void * +dlopen (const char *file, int mode) +{ + return __dlopen (file, mode, RETURN_ADDRESS (0)); +} +static_link_warning (dlopen) + +#else + struct dlopen_args { /* The arguments for dlopen_doit. */ @@ -33,11 +44,11 @@ struct dlopen_args /* Non-shared code has no support for multiple namespaces. */ -#ifdef SHARED -# define NS __LM_ID_CALLER -#else -# define NS LM_ID_BASE -#endif +# ifdef SHARED +# define NS __LM_ID_CALLER +# else +# define NS LM_ID_BASE +# endif static void @@ -50,17 +61,34 @@ dlopen_doit (void *a) } -extern void *__dlopen_check (const char *file, int mode); void * -__dlopen_check (const char *file, int mode) +__dlopen (const char *file, int mode DL_CALLER_DECL) { +# ifdef SHARED + if (__builtin_expect (_dlfcn_hook != NULL, 0)) + return _dlfcn_hook->dlopen (file, mode, DL_CALLER); +# endif + struct dlopen_args args; args.file = file; args.mode = mode; - args.caller = RETURN_ADDRESS (0); + args.caller = DL_CALLER; +# ifdef SHARED return _dlerror_run (dlopen_doit, &args) ? NULL : args.new; +# else + if (_dlerror_run (dlopen_doit, &args)) + return NULL; + + __libc_register_dl_open_hook ((struct link_map *) args.new); + __libc_register_dlfcn_hook ((struct link_map *) args.new); + + return args.new; +# endif } -#include <shlib-compat.h> +# ifdef SHARED +# include <shlib-compat.h> +strong_alias (__dlopen, __dlopen_check) versioned_symbol (libdl, __dlopen_check, dlopen, GLIBC_2_1); -static_link_warning (dlopen) +# endif +#endif diff --git a/dlfcn/dlopenold.c b/dlfcn/dlopenold.c index f10674a..148716c 100644 --- a/dlfcn/dlopenold.c +++ b/dlfcn/dlopenold.c @@ -67,6 +67,9 @@ __dlopen_nocheck (const char *file, int mode) mode |= RTLD_LAZY; args.mode = mode; + if (__builtin_expect (_dlfcn_hook != NULL, 0)) + return _dlfcn_hook->dlopen (file, mode, RETURN_ADDRESS (0)); + return _dlerror_run (dlopen_doit, &args) ? NULL : args.new; } compat_symbol (libdl, __dlopen_nocheck, dlopen, GLIBC_2_0); diff --git a/dlfcn/dlsym.c b/dlfcn/dlsym.c index 76dda59..a656ca6 100644 --- a/dlfcn/dlsym.c +++ b/dlfcn/dlsym.c @@ -22,6 +22,16 @@ #include <ldsodefs.h> +#if !defined SHARED && defined IS_IN_libdl + +void * +dlsym (void *handle, const char *name) +{ + return __dlsym (handle, name, RETURN_ADDRESS (0)); +} + +#else + struct dlsym_args { /* The arguments to dlsym_doit. */ @@ -43,10 +53,15 @@ dlsym_doit (void *a) void * -dlsym (void *handle, const char *name) +__dlsym (void *handle, const char *name DL_CALLER_DECL) { +# ifdef SHARED + if (__builtin_expect (_dlfcn_hook != NULL, 0)) + return _dlfcn_hook->dlsym (handle, name, DL_CALLER); +# endif + struct dlsym_args args; - args.who = RETURN_ADDRESS (0); + args.who = DL_CALLER; args.handle = handle; args.name = name; @@ -59,3 +74,7 @@ dlsym (void *handle, const char *name) return result; } +# ifdef SHARED +strong_alias (__dlsym, dlsym) +# endif +#endif diff --git a/dlfcn/dlvsym.c b/dlfcn/dlvsym.c index 2486845..9f12764 100644 --- a/dlfcn/dlvsym.c +++ b/dlfcn/dlvsym.c @@ -22,6 +22,17 @@ #include <ldsodefs.h> +#if !defined SHARED && defined IS_IN_libdl + +void * +weak_function +dlvsym (void *handle, const char *name, const char *version_str) +{ + return __dlvsym (handle, name, version_str, RETURN_ADDRESS (0)); +} + +#else + struct dlvsym_args { /* The arguments to dlvsym_doit. */ @@ -44,13 +55,18 @@ dlvsym_doit (void *a) } void * -__dlvsym (void *handle, const char *name, const char *version_str) +__dlvsym (void *handle, const char *name, const char *version_str + DL_CALLER_DECL) { - struct dlvsym_args args; +# ifdef SHARED + if (__builtin_expect (_dlfcn_hook != NULL, 0)) + return _dlfcn_hook->dlvsym (handle, name, version_str, DL_CALLER); +# endif + struct dlvsym_args args; args.handle = handle; args.name = name; - args.who = RETURN_ADDRESS (0); + args.who = DL_CALLER; args.version = version_str; /* Protect against concurrent loads and unloads. */ @@ -62,4 +78,7 @@ __dlvsym (void *handle, const char *name, const char *version_str) return result; } +# ifdef SHARED weak_alias (__dlvsym, dlvsym) +# endif +#endif diff --git a/dlfcn/modstatic2.c b/dlfcn/modstatic2.c new file mode 100644 index 0000000..0703de8 --- /dev/null +++ b/dlfcn/modstatic2.c @@ -0,0 +1,228 @@ +#include <dlfcn.h> +#include <link.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <gnu/lib-names.h> + +int test (FILE *out, int a); + +int +test (FILE *out, int a) +{ + fputs ("in modstatic2.c (test)\n", out); + + void *handle = dlopen ("modstatic2-nonexistent.so", RTLD_LAZY); + if (handle == NULL) + fprintf (out, "nonexistent: %s\n", dlerror ()); + else + exit (1); + + handle = dlopen ("modstatic2.so", RTLD_LAZY); + if (handle == NULL) + { + fprintf (out, "%s\n", dlerror ()); + exit (1); + } + + int (*test2) (FILE *, int); + test2 = dlsym (handle, "test"); + if (test2 == NULL) + { + fprintf (out, "%s\n", dlerror ()); + exit (1); + } + if (test2 != test) + { + fprintf (out, "test %p != test2 %p\n", test, test2); + exit (1); + } + + Dl_info info; + int res = dladdr (test2, &info); + if (res == 0) + { + fputs ("dladdr returned 0\n", out); + exit (1); + } + else + { + if (strstr (info.dli_fname, "modstatic2.so") == NULL + || strcmp (info.dli_sname, "test") != 0) + { + fprintf (out, "fname %s sname %s\n", info.dli_fname, info.dli_sname); + exit (1); + } + if (info.dli_saddr != (void *) test2) + { + fprintf (out, "saddr %p != test %p\n", info.dli_saddr, test2); + exit (1); + } + } + + ElfW(Sym) *sym; + void *symp; + res = dladdr1 (test2, &info, &symp, RTLD_DL_SYMENT); + if (res == 0) + { + fputs ("dladdr1 returned 0\n", out); + exit (1); + } + else + { + if (strstr (info.dli_fname, "modstatic2.so") == NULL + || strcmp (info.dli_sname, "test") != 0) + { + fprintf (out, "fname %s sname %s\n", info.dli_fname, info.dli_sname); + exit (1); + } + if (info.dli_saddr != (void *) test2) + { + fprintf (out, "saddr %p != test %p\n", info.dli_saddr, test2); + exit (1); + } + sym = symp; + if (sym == NULL) + { + fputs ("sym == NULL\n", out); + exit (1); + } + if (ELF32_ST_BIND (sym->st_info) != STB_GLOBAL + || ELF32_ST_VISIBILITY (sym->st_other) != STV_DEFAULT) + { + fprintf (out, "bind %d visibility %d\n", + (int) ELF32_ST_BIND (sym->st_info), + (int) ELF32_ST_VISIBILITY (sym->st_other)); + exit (1); + } + } + + Lmid_t lmid; + res = dlinfo (handle, RTLD_DI_LMID, &lmid); + if (res != 0) + { + fprintf (out, "dlinfo returned %d %s\n", res, dlerror ()); + exit (1); + } + else if (lmid != LM_ID_BASE) + { + fprintf (out, "lmid %d != %d\n", (int) lmid, (int) LM_ID_BASE); + exit (1); + } + + void *handle2 = dlopen (LIBDL_SO, RTLD_LAZY); + if (handle2 == NULL) + { + fprintf (out, "libdl.so: %s\n", dlerror ()); + exit (1); + } + +#ifdef DO_VERSIONING + if (dlvsym (handle2, "_dlfcn_hook", "GLIBC_PRIVATE") == NULL) + { + fprintf (out, "dlvsym: %s\n", dlerror ()); + exit (1); + } +#endif + + void *(*dlsymfn) (void *, const char *); + dlsymfn = dlsym (handle2, "dlsym"); + if (dlsymfn == NULL) + { + fprintf (out, "dlsym \"dlsym\": %s\n", dlerror ()); + exit (1); + } + void *test3 = dlsymfn (handle, "test"); + if (test3 == NULL) + { + fprintf (out, "%s\n", dlerror ()); + exit (1); + } + else if (test3 != (void *) test2) + { + fprintf (out, "test2 %p != test3 %p\n", test2, test3); + exit (1); + } + + dlclose (handle2); + dlclose (handle); + + handle = dlmopen (LM_ID_BASE, "modstatic2.so", RTLD_LAZY); + if (handle == NULL) + { + fprintf (out, "%s\n", dlerror ()); + exit (1); + } + dlclose (handle); + + handle = dlmopen (LM_ID_NEWLM, "modstatic2.so", RTLD_LAZY); + if (handle == NULL) + fprintf (out, "LM_ID_NEWLM: %s\n", dlerror ()); + else + { + fputs ("LM_ID_NEWLM unexpectedly succeeded\n", out); + exit (1); + } + + handle = dlopen ("modstatic.so", RTLD_LAZY); + if (handle == NULL) + { + fprintf (out, "%s\n", dlerror ()); + exit (1); + } + + int (*test4) (int); + test4 = dlsym (handle, "test"); + if (test4 == NULL) + { + fprintf (out, "%s\n", dlerror ()); + exit (1); + } + + res = test4 (16); + if (res != 16 + 16) + { + fprintf (out, "modstatic.so (test) returned %d\n", res); + exit (1); + } + + res = dladdr1 (test4, &info, &symp, RTLD_DL_SYMENT); + if (res == 0) + { + fputs ("dladdr1 returned 0\n", out); + exit (1); + } + else + { + if (strstr (info.dli_fname, "modstatic.so") == NULL + || strcmp (info.dli_sname, "test") != 0) + { + fprintf (out, "fname %s sname %s\n", info.dli_fname, info.dli_sname); + exit (1); + } + if (info.dli_saddr != (void *) test4) + { + fprintf (out, "saddr %p != test %p\n", info.dli_saddr, test4); + exit (1); + } + sym = symp; + if (sym == NULL) + { + fputs ("sym == NULL\n", out); + exit (1); + } + if (ELF32_ST_BIND (sym->st_info) != STB_GLOBAL + || ELF32_ST_VISIBILITY (sym->st_other) != STV_DEFAULT) + { + fprintf (out, "bind %d visibility %d\n", + (int) ELF32_ST_BIND (sym->st_info), + (int) ELF32_ST_VISIBILITY (sym->st_other)); + exit (1); + } + } + + dlclose (handle); + + fputs ("leaving modstatic2.c (test)\n", out); + return a + a; +} diff --git a/dlfcn/sdladdr.c b/dlfcn/sdladdr.c new file mode 100644 index 0000000..c484d63 --- /dev/null +++ b/dlfcn/sdladdr.c @@ -0,0 +1 @@ +#include "dladdr.c" diff --git a/dlfcn/sdladdr1.c b/dlfcn/sdladdr1.c new file mode 100644 index 0000000..a655979 --- /dev/null +++ b/dlfcn/sdladdr1.c @@ -0,0 +1 @@ +#include "dladdr1.c" diff --git a/dlfcn/sdlclose.c b/dlfcn/sdlclose.c new file mode 100644 index 0000000..dc89b98 --- /dev/null +++ b/dlfcn/sdlclose.c @@ -0,0 +1 @@ +#include "dlclose.c" diff --git a/dlfcn/sdlerror.c b/dlfcn/sdlerror.c new file mode 100644 index 0000000..f1226a4 --- /dev/null +++ b/dlfcn/sdlerror.c @@ -0,0 +1 @@ +#include "dlerror.c" diff --git a/dlfcn/sdlinfo.c b/dlfcn/sdlinfo.c new file mode 100644 index 0000000..dcc257d --- /dev/null +++ b/dlfcn/sdlinfo.c @@ -0,0 +1 @@ +#include "dlinfo.c" diff --git a/dlfcn/sdlmopen.c b/dlfcn/sdlmopen.c new file mode 100644 index 0000000..9630c89 --- /dev/null +++ b/dlfcn/sdlmopen.c @@ -0,0 +1 @@ +#include "dlmopen.c" diff --git a/dlfcn/sdlopen.c b/dlfcn/sdlopen.c new file mode 100644 index 0000000..1ff2eb2 --- /dev/null +++ b/dlfcn/sdlopen.c @@ -0,0 +1 @@ +#include "dlopen.c" diff --git a/dlfcn/sdlsym.c b/dlfcn/sdlsym.c new file mode 100644 index 0000000..0234f23 --- /dev/null +++ b/dlfcn/sdlsym.c @@ -0,0 +1 @@ +#include "dlsym.c" diff --git a/dlfcn/sdlvsym.c b/dlfcn/sdlvsym.c new file mode 100644 index 0000000..ec42860 --- /dev/null +++ b/dlfcn/sdlvsym.c @@ -0,0 +1 @@ +#include "dlvsym.c" diff --git a/dlfcn/tststatic2.c b/dlfcn/tststatic2.c new file mode 100644 index 0000000..85c0fb2 --- /dev/null +++ b/dlfcn/tststatic2.c @@ -0,0 +1,166 @@ +#include <dlfcn.h> +#include <link.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <gnu/lib-names.h> + +int +main (void) +{ + void *handle = dlopen ("modstatic2-nonexistent.so", RTLD_LAZY); + if (handle == NULL) + printf ("nonexistent: %s\n", dlerror ()); + else + exit (1); + + handle = dlopen ("modstatic2.so", RTLD_LAZY); + if (handle == NULL) + { + printf ("%s\n", dlerror ()); + exit (1); + } + + int (*test) (FILE *, int); + test = dlsym (handle, "test"); + if (test == NULL) + { + printf ("%s\n", dlerror ()); + exit (1); + } + + Dl_info info; + int res = dladdr (test, &info); + if (res == 0) + { + puts ("dladdr returned 0"); + exit (1); + } + else + { + if (strstr (info.dli_fname, "modstatic2.so") == NULL + || strcmp (info.dli_sname, "test") != 0) + { + printf ("fname %s sname %s\n", info.dli_fname, info.dli_sname); + exit (1); + } + if (info.dli_saddr != (void *) test) + { + printf ("saddr %p != test %p\n", info.dli_saddr, test); + exit (1); + } + } + + ElfW(Sym) *sym; + void *symp; + res = dladdr1 (test, &info, &symp, RTLD_DL_SYMENT); + if (res == 0) + { + puts ("dladdr1 returned 0"); + exit (1); + } + else + { + if (strstr (info.dli_fname, "modstatic2.so") == NULL + || strcmp (info.dli_sname, "test") != 0) + { + printf ("fname %s sname %s\n", info.dli_fname, info.dli_sname); + exit (1); + } + if (info.dli_saddr != (void *) test) + { + printf ("saddr %p != test %p\n", info.dli_saddr, test); + exit (1); + } + sym = symp; + if (sym == NULL) + { + puts ("sym == NULL\n"); + exit (1); + } + if (ELF32_ST_BIND (sym->st_info) != STB_GLOBAL + || ELF32_ST_VISIBILITY (sym->st_other) != STV_DEFAULT) + { + printf ("bind %d visibility %d\n", + (int) ELF32_ST_BIND (sym->st_info), + (int) ELF32_ST_VISIBILITY (sym->st_other)); + exit (1); + } + } + + Lmid_t lmid; + res = dlinfo (handle, RTLD_DI_LMID, &lmid); + if (res != 0) + { + printf ("dlinfo returned %d %s\n", res, dlerror ()); + exit (1); + } + else if (lmid != LM_ID_BASE) + { + printf ("lmid %d != %d\n", (int) lmid, (int) LM_ID_BASE); + exit (1); + } + + res = test (stdout, 2); + if (res != 4) + { + printf ("Got %i, expected 4\n", res); + exit (1); + } + + void *handle2 = dlopen (LIBDL_SO, RTLD_LAZY); + if (handle2 == NULL) + { + printf ("libdl.so: %s\n", dlerror ()); + exit (1); + } + +#ifdef DO_VERSIONING + if (dlvsym (handle2, "_dlfcn_hook", "GLIBC_PRIVATE") == NULL) + { + printf ("dlvsym: %s\n", dlerror ()); + exit (1); + } +#endif + + void *(*dlsymfn) (void *, const char *); + dlsymfn = dlsym (handle2, "dlsym"); + if (dlsymfn == NULL) + { + printf ("dlsym \"dlsym\": %s\n", dlerror ()); + exit (1); + } + void *test2 = dlsymfn (handle, "test"); + if (test2 == NULL) + { + printf ("%s\n", dlerror ()); + exit (1); + } + else if (test2 != (void *) test) + { + printf ("test %p != test2 %p\n", test, test2); + exit (1); + } + + dlclose (handle2); + dlclose (handle); + + handle = dlmopen (LM_ID_BASE, "modstatic2.so", RTLD_LAZY); + if (handle == NULL) + { + printf ("%s\n", dlerror ()); + exit (1); + } + dlclose (handle); + + handle = dlmopen (LM_ID_NEWLM, "modstatic2.so", RTLD_LAZY); + if (handle == NULL) + printf ("LM_ID_NEWLM: %s\n", dlerror ()); + else + { + puts ("LM_ID_NEWLM unexpectedly succeeded"); + exit (1); + } + + return 0; +} diff --git a/include/dlfcn.h b/include/dlfcn.h index d6111c0..3ff855a 100644 --- a/include/dlfcn.h +++ b/include/dlfcn.h @@ -11,8 +11,6 @@ #define __LM_ID_CALLER -2 /* Now define the internal interfaces. */ -extern void *__dlvsym (void *__handle, __const char *__name, - __const char *__version); #define __libc_dlopen(name) __libc_dlopen_mode (name, RTLD_LAZY) extern void *__libc_dlopen_mode (__const char *__name, int __mode); @@ -76,4 +74,62 @@ extern int _dl_catch_error (const char **objname, const char **errstring, extern int _dlerror_run (void (*operate) (void *), void *args) internal_function; +#ifdef SHARED +# define DL_CALLER_DECL /* Nothing */ +# define DL_CALLER RETURN_ADDRESS (0) +#else +# define DL_CALLER_DECL , void *dl_caller +# define DL_CALLER dl_caller +#endif + +struct dlfcn_hook +{ + void *(*dlopen) (const char *file, int mode, void *dl_caller); + int (*dlclose) (void *handle); + void *(*dlsym) (void *handle, const char *name, void *dl_caller); + void *(*dlvsym) (void *handle, const char *name, const char *version, + void *dl_caller); + char *(*dlerror) (void); + int (*dladdr) (const void *address, Dl_info *info); + int (*dladdr1) (const void *address, Dl_info *info, + void **extra_info, int flags); + int (*dlinfo) (void *handle, int request, void *arg, void *dl_caller); + void *(*dlmopen) (Lmid_t nsid, const char *file, int mode, void *dl_caller); + void *pad[4]; +}; + +extern struct dlfcn_hook *_dlfcn_hook; +libdl_hidden_proto (_dlfcn_hook) + +extern void *__dlopen (const char *file, int mode DL_CALLER_DECL) + attribute_hidden; +extern void *__dlmopen (Lmid_t nsid, const char *file, int mode DL_CALLER_DECL) + attribute_hidden; +extern int __dlclose (void *handle) + attribute_hidden; +extern void *__dlsym (void *handle, const char *name DL_CALLER_DECL) + attribute_hidden; +extern void *__dlvsym (void *handle, const char *name, const char *version + DL_CALLER_DECL) + attribute_hidden; +extern char *__dlerror (void) + attribute_hidden; +extern int __dladdr (const void *address, Dl_info *info) + attribute_hidden; +extern int __dladdr1 (const void *address, Dl_info *info, + void **extra_info, int flags) + attribute_hidden; +extern int __dlinfo (void *handle, int request, void *arg DL_CALLER_DECL) + attribute_hidden; + +#ifndef SHARED +struct link_map; +extern void * __libc_dlsym_private (struct link_map *map, const char *name) + attribute_hidden; +extern void __libc_register_dl_open_hook (struct link_map *map) + attribute_hidden; +extern void __libc_register_dlfcn_hook (struct link_map *map) + attribute_hidden; +#endif + #endif diff --git a/include/libc-symbols.h b/include/libc-symbols.h index e7880b6..7dd0d29 100644 --- a/include/libc-symbols.h +++ b/include/libc-symbols.h @@ -762,6 +762,24 @@ for linking") # define libresolv_hidden_data_ver(local, name) #endif +#if defined NOT_IN_libc && defined IS_IN_libdl +# define libdl_hidden_proto(name, attrs...) hidden_proto (name, ##attrs) +# define libdl_hidden_def(name) hidden_def (name) +# define libdl_hidden_weak(name) hidden_weak (name) +# define libdl_hidden_ver(local, name) hidden_ver (local, name) +# define libdl_hidden_data_def(name) hidden_data_def (name) +# define libdl_hidden_data_weak(name) hidden_data_weak (name) +# define libdl_hidden_data_ver(local, name) hidden_data_ver (local, name) +#else +# define libdl_hidden_proto(name, attrs...) +# define libdl_hidden_def(name) +# define libdl_hidden_weak(name) +# define libdl_hidden_ver(local, name) +# define libdl_hidden_data_def(name) +# define libdl_hidden_data_weak(name) +# define libdl_hidden_data_ver(local, name) +#endif + #ifdef HAVE_BUILTIN_REDIRECTION # define libc_hidden_builtin_proto(name, attrs...) libc_hidden_proto (name, ##attrs) # define libc_hidden_builtin_def(name) libc_hidden_def (name) diff --git a/malloc/arena.c b/malloc/arena.c index 9018a4f..024e191 100644 --- a/malloc/arena.c +++ b/malloc/arena.c @@ -347,6 +347,9 @@ __failing_morecore (ptrdiff_t d) { return (void *) MORECORE_FAILURE; } + +extern struct dl_open_hook *_dl_open_hook; +libc_hidden_proto (_dl_open_hook); # endif # if defined SHARED && defined USE_TLS && !USE___THREAD @@ -429,10 +432,14 @@ ptmalloc_init (void) main_arena.next = &main_arena; #if defined _LIBC && defined SHARED - /* In case this libc copy is in a non-default namespace, never use brk. */ + /* In case this libc copy is in a non-default namespace, never use brk. + Likewise if dlopened from statically linked program. */ Dl_info di; struct link_map *l; - if (_dl_addr (ptmalloc_init, &di, &l, NULL) != 0 && l->l_ns != LM_ID_BASE) + + if (_dl_open_hook != NULL + || (_dl_addr (ptmalloc_init, &di, &l, NULL) != 0 + && l->l_ns != LM_ID_BASE)) __morecore = __failing_morecore; #endif |