lethliel/glibc
1
0
Fork 0
forked from rpms/glibc
Code Issues Pull Requests Releases Activity
c9-beta
glibc/SOURCES/glibc-upstream-2.34-237.patch
CentOS Sources cd44dc02f2 import glibc-2.34-40.el9
2022-09-28 11:23:43 +00:00

752 lines
23 KiB
Diff
Raw Permalink Blame History

commit b0bd6a1323c3eccd16c45bae359a76877fa75639
Author: Florian Weimer <fweimer@redhat.com>
Date: Thu May 19 11:43:53 2022 +0200
elf: Merge dl-sysdep.c into the Linux version
The generic version is the de-facto Linux implementation. It
requires an auxiliary vector, so Hurd does not use it.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit 91c0a47ffb66e7cd802de870686465db3b3976a0)
Conflicts:
elf/dl-sysdep.c
(missing ld.so dependency sorting optimization upstream)
diff --git a/elf/dl-sysdep.c b/elf/dl-sysdep.c
index 1c78dc89c9cbe54d..7aa90ad6eeb35cad 100644
--- a/elf/dl-sysdep.c
+++ b/elf/dl-sysdep.c
@@ -1,5 +1,5 @@
-/* Operating system support for run-time dynamic linker. Generic Unix version.
- Copyright (C) 1995-2021 Free Software Foundation, Inc.
+/* Operating system support for run-time dynamic linker. Stub version.
+ Copyright (C) 1995-2022 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
@@ -16,352 +16,4 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
-/* We conditionalize the whole of this file rather than simply eliding it
- from the static build, because other sysdeps/ versions of this file
- might define things needed by a static build. */
-
-#ifdef SHARED
-
-#include <assert.h>
-#include <elf.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <libintl.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <ldsodefs.h>
-#include <_itoa.h>
-#include <fpu_control.h>
-
-#include <entry.h>
-#include <dl-machine.h>
-#include <dl-procinfo.h>
-#include <dl-osinfo.h>
-#include <libc-internal.h>
-#include <tls.h>
-
-#include <dl-tunables.h>
-#include <dl-auxv.h>
-#include <dl-hwcap-check.h>
-
-extern char **_environ attribute_hidden;
-extern char _end[] attribute_hidden;
-
-/* Protect SUID program against misuse of file descriptors. */
-extern void __libc_check_standard_fds (void);
-
-int __libc_enable_secure attribute_relro = 0;
-rtld_hidden_data_def (__libc_enable_secure)
-/* This variable contains the lowest stack address ever used. */
-void *__libc_stack_end attribute_relro = NULL;
-rtld_hidden_data_def(__libc_stack_end)
-void *_dl_random attribute_relro = NULL;
-
-#ifndef DL_FIND_ARG_COMPONENTS
-# define DL_FIND_ARG_COMPONENTS(cookie, argc, argv, envp, auxp) \
- do { \
- void **_tmp; \
- (argc) = *(long int *) cookie; \
- (argv) = (char **) ((long int *) cookie + 1); \
- (envp) = (argv) + (argc) + 1; \
- for (_tmp = (void **) (envp); *_tmp; ++_tmp) \
- continue; \
- (auxp) = (void *) ++_tmp; \
- } while (0)
-#endif
-
-#ifndef DL_STACK_END
-# define DL_STACK_END(cookie) ((void *) (cookie))
-#endif
-
-ElfW(Addr)
-_dl_sysdep_start (void **start_argptr,
- void (*dl_main) (const ElfW(Phdr) *phdr, ElfW(Word) phnum,
- ElfW(Addr) *user_entry, ElfW(auxv_t) *auxv))
-{
- const ElfW(Phdr) *phdr = NULL;
- ElfW(Word) phnum = 0;
- ElfW(Addr) user_entry;
- ElfW(auxv_t) *av;
-#ifdef HAVE_AUX_SECURE
-# define set_seen(tag) (tag) /* Evaluate for the side effects. */
-# define set_seen_secure() ((void) 0)
-#else
- uid_t uid = 0;
- gid_t gid = 0;
- unsigned int seen = 0;
-# define set_seen_secure() (seen = -1)
-# ifdef HAVE_AUX_XID
-# define set_seen(tag) (tag) /* Evaluate for the side effects. */
-# else
-# define M(type) (1 << (type))
-# define set_seen(tag) seen |= M ((tag)->a_type)
-# endif
-#endif
-#ifdef NEED_DL_SYSINFO
- uintptr_t new_sysinfo = 0;
-#endif
-
- __libc_stack_end = DL_STACK_END (start_argptr);
- DL_FIND_ARG_COMPONENTS (start_argptr, _dl_argc, _dl_argv, _environ,
- GLRO(dl_auxv));
-
- user_entry = (ElfW(Addr)) ENTRY_POINT;
- GLRO(dl_platform) = NULL; /* Default to nothing known about the platform. */
-
- /* NB: Default to a constant CONSTANT_MINSIGSTKSZ. */
- _Static_assert (__builtin_constant_p (CONSTANT_MINSIGSTKSZ),
- "CONSTANT_MINSIGSTKSZ is constant");
- GLRO(dl_minsigstacksize) = CONSTANT_MINSIGSTKSZ;
-
- for (av = GLRO(dl_auxv); av->a_type != AT_NULL; set_seen (av++))
- switch (av->a_type)
- {
- case AT_PHDR:
- phdr = (void *) av->a_un.a_val;
- break;
- case AT_PHNUM:
- phnum = av->a_un.a_val;
- break;
- case AT_PAGESZ:
- GLRO(dl_pagesize) = av->a_un.a_val;
- break;
- case AT_ENTRY:
- user_entry = av->a_un.a_val;
- break;
-#ifndef HAVE_AUX_SECURE
- case AT_UID:
- case AT_EUID:
- uid ^= av->a_un.a_val;
- break;
- case AT_GID:
- case AT_EGID:
- gid ^= av->a_un.a_val;
- break;
-#endif
- case AT_SECURE:
-#ifndef HAVE_AUX_SECURE
- seen = -1;
-#endif
- __libc_enable_secure = av->a_un.a_val;
- break;
- case AT_PLATFORM:
- GLRO(dl_platform) = (void *) av->a_un.a_val;
- break;
- case AT_HWCAP:
- GLRO(dl_hwcap) = (unsigned long int) av->a_un.a_val;
- break;
- case AT_HWCAP2:
- GLRO(dl_hwcap2) = (unsigned long int) av->a_un.a_val;
- break;
- case AT_CLKTCK:
- GLRO(dl_clktck) = av->a_un.a_val;
- break;
- case AT_FPUCW:
- GLRO(dl_fpu_control) = av->a_un.a_val;
- break;
-#ifdef NEED_DL_SYSINFO
- case AT_SYSINFO:
- new_sysinfo = av->a_un.a_val;
- break;
-#endif
-#ifdef NEED_DL_SYSINFO_DSO
- case AT_SYSINFO_EHDR:
- GLRO(dl_sysinfo_dso) = (void *) av->a_un.a_val;
- break;
-#endif
- case AT_RANDOM:
- _dl_random = (void *) av->a_un.a_val;
- break;
- case AT_MINSIGSTKSZ:
- GLRO(dl_minsigstacksize) = av->a_un.a_val;
- break;
- DL_PLATFORM_AUXV
- }
-
- dl_hwcap_check ();
-
-#ifndef HAVE_AUX_SECURE
- if (seen != -1)
- {
- /* Fill in the values we have not gotten from the kernel through the
- auxiliary vector. */
-# ifndef HAVE_AUX_XID
-# define SEE(UID, var, uid) \
- if ((seen & M (AT_##UID)) == 0) var ^= __get##uid ()
- SEE (UID, uid, uid);
- SEE (EUID, uid, euid);
- SEE (GID, gid, gid);
- SEE (EGID, gid, egid);
-# endif
-
- /* If one of the two pairs of IDs does not match this is a setuid
- or setgid run. */
- __libc_enable_secure = uid | gid;
- }
-#endif
-
-#ifndef HAVE_AUX_PAGESIZE
- if (GLRO(dl_pagesize) == 0)
- GLRO(dl_pagesize) = __getpagesize ();
-#endif
-
-#ifdef NEED_DL_SYSINFO
- if (new_sysinfo != 0)
- {
-# ifdef NEED_DL_SYSINFO_DSO
- /* Only set the sysinfo value if we also have the vsyscall DSO. */
- if (GLRO(dl_sysinfo_dso) != 0)
-# endif
- GLRO(dl_sysinfo) = new_sysinfo;
- }
-#endif
-
- __tunables_init (_environ);
-
- /* Initialize DSO sorting algorithm after tunables. */
- _dl_sort_maps_init ();
-
-#ifdef DL_SYSDEP_INIT
- DL_SYSDEP_INIT;
-#endif
-
-#ifdef DL_PLATFORM_INIT
- DL_PLATFORM_INIT;
-#endif
-
- /* Determine the length of the platform name. */
- if (GLRO(dl_platform) != NULL)
- GLRO(dl_platformlen) = strlen (GLRO(dl_platform));
-
- if (__sbrk (0) == _end)
- /* The dynamic linker was run as a program, and so the initial break
- starts just after our bss, at &_end. The malloc in dl-minimal.c
- will consume the rest of this page, so tell the kernel to move the
- break up that far. When the user program examines its break, it
- will see this new value and not clobber our data. */
- __sbrk (GLRO(dl_pagesize)
- - ((_end - (char *) 0) & (GLRO(dl_pagesize) - 1)));
-
- /* If this is a SUID program we make sure that FDs 0, 1, and 2 are
- allocated. If necessary we are doing it ourself. If it is not
- possible we stop the program. */
- if (__builtin_expect (__libc_enable_secure, 0))
- __libc_check_standard_fds ();
-
- (*dl_main) (phdr, phnum, &user_entry, GLRO(dl_auxv));
- return user_entry;
-}
-
-void
-_dl_sysdep_start_cleanup (void)
-{
-}
-
-void
-_dl_show_auxv (void)
-{
- char buf[64];
- ElfW(auxv_t) *av;
-
- /* Terminate string. */
- buf[63] = '\0';
-
- /* The following code assumes that the AT_* values are encoded
- starting from 0 with AT_NULL, 1 for AT_IGNORE, and all other values
- close by (otherwise the array will be too large). In case we have
- to support a platform where these requirements are not fulfilled
- some alternative implementation has to be used. */
- for (av = GLRO(dl_auxv); av->a_type != AT_NULL; ++av)
- {
- static const struct
- {
- const char label[22];
- enum { unknown = 0, dec, hex, str, ignore } form : 8;
- } auxvars[] =
- {
- [AT_EXECFD - 2] = { "EXECFD: ", dec },
- [AT_EXECFN - 2] = { "EXECFN: ", str },
- [AT_PHDR - 2] = { "PHDR: 0x", hex },
- [AT_PHENT - 2] = { "PHENT: ", dec },
- [AT_PHNUM - 2] = { "PHNUM: ", dec },
- [AT_PAGESZ - 2] = { "PAGESZ: ", dec },
- [AT_BASE - 2] = { "BASE: 0x", hex },
- [AT_FLAGS - 2] = { "FLAGS: 0x", hex },
- [AT_ENTRY - 2] = { "ENTRY: 0x", hex },
- [AT_NOTELF - 2] = { "NOTELF: ", hex },
- [AT_UID - 2] = { "UID: ", dec },
- [AT_EUID - 2] = { "EUID: ", dec },
- [AT_GID - 2] = { "GID: ", dec },
- [AT_EGID - 2] = { "EGID: ", dec },
- [AT_PLATFORM - 2] = { "PLATFORM: ", str },
- [AT_HWCAP - 2] = { "HWCAP: ", hex },
- [AT_CLKTCK - 2] = { "CLKTCK: ", dec },
- [AT_FPUCW - 2] = { "FPUCW: ", hex },
- [AT_DCACHEBSIZE - 2] = { "DCACHEBSIZE: 0x", hex },
- [AT_ICACHEBSIZE - 2] = { "ICACHEBSIZE: 0x", hex },
- [AT_UCACHEBSIZE - 2] = { "UCACHEBSIZE: 0x", hex },
- [AT_IGNOREPPC - 2] = { "IGNOREPPC", ignore },
- [AT_SECURE - 2] = { "SECURE: ", dec },
- [AT_BASE_PLATFORM - 2] = { "BASE_PLATFORM: ", str },
- [AT_SYSINFO - 2] = { "SYSINFO: 0x", hex },
- [AT_SYSINFO_EHDR - 2] = { "SYSINFO_EHDR: 0x", hex },
- [AT_RANDOM - 2] = { "RANDOM: 0x", hex },
- [AT_HWCAP2 - 2] = { "HWCAP2: 0x", hex },
- [AT_MINSIGSTKSZ - 2] = { "MINSIGSTKSZ: ", dec },
- [AT_L1I_CACHESIZE - 2] = { "L1I_CACHESIZE: ", dec },
- [AT_L1I_CACHEGEOMETRY - 2] = { "L1I_CACHEGEOMETRY: 0x", hex },
- [AT_L1D_CACHESIZE - 2] = { "L1D_CACHESIZE: ", dec },
- [AT_L1D_CACHEGEOMETRY - 2] = { "L1D_CACHEGEOMETRY: 0x", hex },
- [AT_L2_CACHESIZE - 2] = { "L2_CACHESIZE: ", dec },
- [AT_L2_CACHEGEOMETRY - 2] = { "L2_CACHEGEOMETRY: 0x", hex },
- [AT_L3_CACHESIZE - 2] = { "L3_CACHESIZE: ", dec },
- [AT_L3_CACHEGEOMETRY - 2] = { "L3_CACHEGEOMETRY: 0x", hex },
- };
- unsigned int idx = (unsigned int) (av->a_type - 2);
-
- if ((unsigned int) av->a_type < 2u
- || (idx < sizeof (auxvars) / sizeof (auxvars[0])
- && auxvars[idx].form == ignore))
- continue;
-
- assert (AT_NULL == 0);
- assert (AT_IGNORE == 1);
-
- /* Some entries are handled in a special way per platform. */
- if (_dl_procinfo (av->a_type, av->a_un.a_val) == 0)
- continue;
-
- if (idx < sizeof (auxvars) / sizeof (auxvars[0])
- && auxvars[idx].form != unknown)
- {
- const char *val = (char *) av->a_un.a_val;
-
- if (__builtin_expect (auxvars[idx].form, dec) == dec)
- val = _itoa ((unsigned long int) av->a_un.a_val,
- buf + sizeof buf - 1, 10, 0);
- else if (__builtin_expect (auxvars[idx].form, hex) == hex)
- val = _itoa ((unsigned long int) av->a_un.a_val,
- buf + sizeof buf - 1, 16, 0);
-
- _dl_printf ("AT_%s%s\n", auxvars[idx].label, val);
-
- continue;
- }
-
- /* Unknown value: print a generic line. */
- char buf2[17];
- buf2[sizeof (buf2) - 1] = '\0';
- const char *val2 = _itoa ((unsigned long int) av->a_un.a_val,
- buf2 + sizeof buf2 - 1, 16, 0);
- const char *val = _itoa ((unsigned long int) av->a_type,
- buf + sizeof buf - 1, 16, 0);
- _dl_printf ("AT_??? (0x%s): 0x%s\n", val, val2);
- }
-}
-
-#endif
+#error dl-sysdep support missing.
diff --git a/sysdeps/unix/sysv/linux/dl-sysdep.c b/sysdeps/unix/sysv/linux/dl-sysdep.c
index 144dc5ce5a1bba17..3e41469bcc395179 100644
--- a/sysdeps/unix/sysv/linux/dl-sysdep.c
+++ b/sysdeps/unix/sysv/linux/dl-sysdep.c
@@ -16,29 +16,352 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
-/* Linux needs some special initialization, but otherwise uses
- the generic dynamic linker system interface code. */
-
-#include <string.h>
+#include <_itoa.h>
+#include <assert.h>
+#include <dl-auxv.h>
+#include <dl-hwcap-check.h>
+#include <dl-osinfo.h>
+#include <dl-procinfo.h>
+#include <dl-tunables.h>
+#include <elf.h>
+#include <entry.h>
+#include <errno.h>
#include <fcntl.h>
-#include <unistd.h>
-#include <sys/param.h>
-#include <sys/utsname.h>
+#include <fpu_control.h>
#include <ldsodefs.h>
+#include <libc-internal.h>
+#include <libintl.h>
#include <not-cancel.h>
+#include <stdlib.h>
+#include <string.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/utsname.h>
+#include <tls.h>
+#include <unistd.h>
+
+#include <dl-machine.h>
#ifdef SHARED
-# define DL_SYSDEP_INIT frob_brk ()
+extern char **_environ attribute_hidden;
+extern char _end[] attribute_hidden;
+
+/* Protect SUID program against misuse of file descriptors. */
+extern void __libc_check_standard_fds (void);
-static inline void
-frob_brk (void)
+int __libc_enable_secure attribute_relro = 0;
+rtld_hidden_data_def (__libc_enable_secure)
+/* This variable contains the lowest stack address ever used. */
+void *__libc_stack_end attribute_relro = NULL;
+rtld_hidden_data_def(__libc_stack_end)
+void *_dl_random attribute_relro = NULL;
+
+#ifndef DL_FIND_ARG_COMPONENTS
+# define DL_FIND_ARG_COMPONENTS(cookie, argc, argv, envp, auxp) \
+ do { \
+ void **_tmp; \
+ (argc) = *(long int *) cookie; \
+ (argv) = (char **) ((long int *) cookie + 1); \
+ (envp) = (argv) + (argc) + 1; \
+ for (_tmp = (void **) (envp); *_tmp; ++_tmp) \
+ continue; \
+ (auxp) = (void *) ++_tmp; \
+ } while (0)
+#endif
+
+#ifndef DL_STACK_END
+# define DL_STACK_END(cookie) ((void *) (cookie))
+#endif
+
+ElfW(Addr)
+_dl_sysdep_start (void **start_argptr,
+ void (*dl_main) (const ElfW(Phdr) *phdr, ElfW(Word) phnum,
+ ElfW(Addr) *user_entry, ElfW(auxv_t) *auxv))
{
+ const ElfW(Phdr) *phdr = NULL;
+ ElfW(Word) phnum = 0;
+ ElfW(Addr) user_entry;
+ ElfW(auxv_t) *av;
+#ifdef HAVE_AUX_SECURE
+# define set_seen(tag) (tag) /* Evaluate for the side effects. */
+# define set_seen_secure() ((void) 0)
+#else
+ uid_t uid = 0;
+ gid_t gid = 0;
+ unsigned int seen = 0;
+# define set_seen_secure() (seen = -1)
+# ifdef HAVE_AUX_XID
+# define set_seen(tag) (tag) /* Evaluate for the side effects. */
+# else
+# define M(type) (1 << (type))
+# define set_seen(tag) seen |= M ((tag)->a_type)
+# endif
+#endif
+#ifdef NEED_DL_SYSINFO
+ uintptr_t new_sysinfo = 0;
+#endif
+
+ __libc_stack_end = DL_STACK_END (start_argptr);
+ DL_FIND_ARG_COMPONENTS (start_argptr, _dl_argc, _dl_argv, _environ,
+ GLRO(dl_auxv));
+
+ user_entry = (ElfW(Addr)) ENTRY_POINT;
+ GLRO(dl_platform) = NULL; /* Default to nothing known about the platform. */
+
+ /* NB: Default to a constant CONSTANT_MINSIGSTKSZ. */
+ _Static_assert (__builtin_constant_p (CONSTANT_MINSIGSTKSZ),
+ "CONSTANT_MINSIGSTKSZ is constant");
+ GLRO(dl_minsigstacksize) = CONSTANT_MINSIGSTKSZ;
+
+ for (av = GLRO(dl_auxv); av->a_type != AT_NULL; set_seen (av++))
+ switch (av->a_type)
+ {
+ case AT_PHDR:
+ phdr = (void *) av->a_un.a_val;
+ break;
+ case AT_PHNUM:
+ phnum = av->a_un.a_val;
+ break;
+ case AT_PAGESZ:
+ GLRO(dl_pagesize) = av->a_un.a_val;
+ break;
+ case AT_ENTRY:
+ user_entry = av->a_un.a_val;
+ break;
+#ifndef HAVE_AUX_SECURE
+ case AT_UID:
+ case AT_EUID:
+ uid ^= av->a_un.a_val;
+ break;
+ case AT_GID:
+ case AT_EGID:
+ gid ^= av->a_un.a_val;
+ break;
+#endif
+ case AT_SECURE:
+#ifndef HAVE_AUX_SECURE
+ seen = -1;
+#endif
+ __libc_enable_secure = av->a_un.a_val;
+ break;
+ case AT_PLATFORM:
+ GLRO(dl_platform) = (void *) av->a_un.a_val;
+ break;
+ case AT_HWCAP:
+ GLRO(dl_hwcap) = (unsigned long int) av->a_un.a_val;
+ break;
+ case AT_HWCAP2:
+ GLRO(dl_hwcap2) = (unsigned long int) av->a_un.a_val;
+ break;
+ case AT_CLKTCK:
+ GLRO(dl_clktck) = av->a_un.a_val;
+ break;
+ case AT_FPUCW:
+ GLRO(dl_fpu_control) = av->a_un.a_val;
+ break;
+#ifdef NEED_DL_SYSINFO
+ case AT_SYSINFO:
+ new_sysinfo = av->a_un.a_val;
+ break;
+#endif
+#ifdef NEED_DL_SYSINFO_DSO
+ case AT_SYSINFO_EHDR:
+ GLRO(dl_sysinfo_dso) = (void *) av->a_un.a_val;
+ break;
+#endif
+ case AT_RANDOM:
+ _dl_random = (void *) av->a_un.a_val;
+ break;
+ case AT_MINSIGSTKSZ:
+ GLRO(dl_minsigstacksize) = av->a_un.a_val;
+ break;
+ DL_PLATFORM_AUXV
+ }
+
+ dl_hwcap_check ();
+
+#ifndef HAVE_AUX_SECURE
+ if (seen != -1)
+ {
+ /* Fill in the values we have not gotten from the kernel through the
+ auxiliary vector. */
+# ifndef HAVE_AUX_XID
+# define SEE(UID, var, uid) \
+ if ((seen & M (AT_##UID)) == 0) var ^= __get##uid ()
+ SEE (UID, uid, uid);
+ SEE (EUID, uid, euid);
+ SEE (GID, gid, gid);
+ SEE (EGID, gid, egid);
+# endif
+
+ /* If one of the two pairs of IDs does not match this is a setuid
+ or setgid run. */
+ __libc_enable_secure = uid | gid;
+ }
+#endif
+
+#ifndef HAVE_AUX_PAGESIZE
+ if (GLRO(dl_pagesize) == 0)
+ GLRO(dl_pagesize) = __getpagesize ();
+#endif
+
+#ifdef NEED_DL_SYSINFO
+ if (new_sysinfo != 0)
+ {
+# ifdef NEED_DL_SYSINFO_DSO
+ /* Only set the sysinfo value if we also have the vsyscall DSO. */
+ if (GLRO(dl_sysinfo_dso) != 0)
+# endif
+ GLRO(dl_sysinfo) = new_sysinfo;
+ }
+#endif
+
+ __tunables_init (_environ);
+
+ /* Initialize DSO sorting algorithm after tunables. */
+ _dl_sort_maps_init ();
+
__brk (0); /* Initialize the break. */
-}
-# include <elf/dl-sysdep.c>
+#ifdef DL_PLATFORM_INIT
+ DL_PLATFORM_INIT;
#endif
+ /* Determine the length of the platform name. */
+ if (GLRO(dl_platform) != NULL)
+ GLRO(dl_platformlen) = strlen (GLRO(dl_platform));
+
+ if (__sbrk (0) == _end)
+ /* The dynamic linker was run as a program, and so the initial break
+ starts just after our bss, at &_end. The malloc in dl-minimal.c
+ will consume the rest of this page, so tell the kernel to move the
+ break up that far. When the user program examines its break, it
+ will see this new value and not clobber our data. */
+ __sbrk (GLRO(dl_pagesize)
+ - ((_end - (char *) 0) & (GLRO(dl_pagesize) - 1)));
+
+ /* If this is a SUID program we make sure that FDs 0, 1, and 2 are
+ allocated. If necessary we are doing it ourself. If it is not
+ possible we stop the program. */
+ if (__builtin_expect (__libc_enable_secure, 0))
+ __libc_check_standard_fds ();
+
+ (*dl_main) (phdr, phnum, &user_entry, GLRO(dl_auxv));
+ return user_entry;
+}
+
+void
+_dl_sysdep_start_cleanup (void)
+{
+}
+
+void
+_dl_show_auxv (void)
+{
+ char buf[64];
+ ElfW(auxv_t) *av;
+
+ /* Terminate string. */
+ buf[63] = '\0';
+
+ /* The following code assumes that the AT_* values are encoded
+ starting from 0 with AT_NULL, 1 for AT_IGNORE, and all other values
+ close by (otherwise the array will be too large). In case we have
+ to support a platform where these requirements are not fulfilled
+ some alternative implementation has to be used. */
+ for (av = GLRO(dl_auxv); av->a_type != AT_NULL; ++av)
+ {
+ static const struct
+ {
+ const char label[22];
+ enum { unknown = 0, dec, hex, str, ignore } form : 8;
+ } auxvars[] =
+ {
+ [AT_EXECFD - 2] = { "EXECFD: ", dec },
+ [AT_EXECFN - 2] = { "EXECFN: ", str },
+ [AT_PHDR - 2] = { "PHDR: 0x", hex },
+ [AT_PHENT - 2] = { "PHENT: ", dec },
+ [AT_PHNUM - 2] = { "PHNUM: ", dec },
+ [AT_PAGESZ - 2] = { "PAGESZ: ", dec },
+ [AT_BASE - 2] = { "BASE: 0x", hex },
+ [AT_FLAGS - 2] = { "FLAGS: 0x", hex },
+ [AT_ENTRY - 2] = { "ENTRY: 0x", hex },
+ [AT_NOTELF - 2] = { "NOTELF: ", hex },
+ [AT_UID - 2] = { "UID: ", dec },
+ [AT_EUID - 2] = { "EUID: ", dec },
+ [AT_GID - 2] = { "GID: ", dec },
+ [AT_EGID - 2] = { "EGID: ", dec },
+ [AT_PLATFORM - 2] = { "PLATFORM: ", str },
+ [AT_HWCAP - 2] = { "HWCAP: ", hex },
+ [AT_CLKTCK - 2] = { "CLKTCK: ", dec },
+ [AT_FPUCW - 2] = { "FPUCW: ", hex },
+ [AT_DCACHEBSIZE - 2] = { "DCACHEBSIZE: 0x", hex },
+ [AT_ICACHEBSIZE - 2] = { "ICACHEBSIZE: 0x", hex },
+ [AT_UCACHEBSIZE - 2] = { "UCACHEBSIZE: 0x", hex },
+ [AT_IGNOREPPC - 2] = { "IGNOREPPC", ignore },
+ [AT_SECURE - 2] = { "SECURE: ", dec },
+ [AT_BASE_PLATFORM - 2] = { "BASE_PLATFORM: ", str },
+ [AT_SYSINFO - 2] = { "SYSINFO: 0x", hex },
+ [AT_SYSINFO_EHDR - 2] = { "SYSINFO_EHDR: 0x", hex },
+ [AT_RANDOM - 2] = { "RANDOM: 0x", hex },
+ [AT_HWCAP2 - 2] = { "HWCAP2: 0x", hex },
+ [AT_MINSIGSTKSZ - 2] = { "MINSIGSTKSZ: ", dec },
+ [AT_L1I_CACHESIZE - 2] = { "L1I_CACHESIZE: ", dec },
+ [AT_L1I_CACHEGEOMETRY - 2] = { "L1I_CACHEGEOMETRY: 0x", hex },
+ [AT_L1D_CACHESIZE - 2] = { "L1D_CACHESIZE: ", dec },
+ [AT_L1D_CACHEGEOMETRY - 2] = { "L1D_CACHEGEOMETRY: 0x", hex },
+ [AT_L2_CACHESIZE - 2] = { "L2_CACHESIZE: ", dec },
+ [AT_L2_CACHEGEOMETRY - 2] = { "L2_CACHEGEOMETRY: 0x", hex },
+ [AT_L3_CACHESIZE - 2] = { "L3_CACHESIZE: ", dec },
+ [AT_L3_CACHEGEOMETRY - 2] = { "L3_CACHEGEOMETRY: 0x", hex },
+ };
+ unsigned int idx = (unsigned int) (av->a_type - 2);
+
+ if ((unsigned int) av->a_type < 2u
+ || (idx < sizeof (auxvars) / sizeof (auxvars[0])
+ && auxvars[idx].form == ignore))
+ continue;
+
+ assert (AT_NULL == 0);
+ assert (AT_IGNORE == 1);
+
+ /* Some entries are handled in a special way per platform. */
+ if (_dl_procinfo (av->a_type, av->a_un.a_val) == 0)
+ continue;
+
+ if (idx < sizeof (auxvars) / sizeof (auxvars[0])
+ && auxvars[idx].form != unknown)
+ {
+ const char *val = (char *) av->a_un.a_val;
+
+ if (__builtin_expect (auxvars[idx].form, dec) == dec)
+ val = _itoa ((unsigned long int) av->a_un.a_val,
+ buf + sizeof buf - 1, 10, 0);
+ else if (__builtin_expect (auxvars[idx].form, hex) == hex)
+ val = _itoa ((unsigned long int) av->a_un.a_val,
+ buf + sizeof buf - 1, 16, 0);
+
+ _dl_printf ("AT_%s%s\n", auxvars[idx].label, val);
+
+ continue;
+ }
+
+ /* Unknown value: print a generic line. */
+ char buf2[17];
+ buf2[sizeof (buf2) - 1] = '\0';
+ const char *val2 = _itoa ((unsigned long int) av->a_un.a_val,
+ buf2 + sizeof buf2 - 1, 16, 0);
+ const char *val = _itoa ((unsigned long int) av->a_type,
+ buf + sizeof buf - 1, 16, 0);
+ _dl_printf ("AT_??? (0x%s): 0x%s\n", val, val2);
+ }
+}
+
+#endif /* SHARED */
+
int
attribute_hidden
Reference in New Issue View Git Blame Copy Permalink