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* sysdeps/generic/ldsodefs.h (struct rtld_global_ro): Define

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_dl_sysinfo_dso under [NEED_DL_SYSINFO_DSO] as well.
	* elf/rtld.c (dl_main): Set up GLRO(dl_sysinfo_dso) under
	[NEED_DL_SYSINFO_DSO] as well.
	* sysdeps/generic/dl-sysdep.c (_dl_show_auxv): Always include
	AT_SYSINFO and AT_SYSINFO_EHDR in name table.
	(_dl_sysdep_start) [NEED_DL_SYSINFO_DSO]: Match AT_SYSINFO_EHDR.
	* elf/dl-support.c (_dl_sysinfo_dso): Define also under
	[NEED_DL_SYSINFO_DSO].
	(_dl_aux_init) [NEED_DL_SYSINFO || NEED_DL_SYSINFO_DSO]:
	Match AT_SYSINFO_EHDR and set GL(dl_sysinfo_dso).

2004-11-05  Roland McGrath  <roland@redhat.com>
This commit is contained in:
Roland McGrath 2004-11-06 00:24:55 +00:00
parent c3047bca73
commit 30e32d23eb
5 changed files with 30 additions and 5 deletions
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14
ChangeLog
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@ -1,3 +1,17 @@
2004-11-05 Roland McGrath <roland@redhat.com>
* sysdeps/generic/ldsodefs.h (struct rtld_global_ro): Define
_dl_sysinfo_dso under [NEED_DL_SYSINFO_DSO] as well.
* elf/rtld.c (dl_main): Set up GLRO(dl_sysinfo_dso) under
[NEED_DL_SYSINFO_DSO] as well.
* sysdeps/generic/dl-sysdep.c (_dl_show_auxv): Always include
AT_SYSINFO and AT_SYSINFO_EHDR in name table.
(_dl_sysdep_start) [NEED_DL_SYSINFO_DSO]: Match AT_SYSINFO_EHDR.
* elf/dl-support.c (_dl_sysinfo_dso): Define also under
[NEED_DL_SYSINFO_DSO].
(_dl_aux_init) [NEED_DL_SYSINFO || NEED_DL_SYSINFO_DSO]:
Match AT_SYSINFO_EHDR and set GL(dl_sysinfo_dso).
2004-11-05 Roland McGrath <roland@redhat.com>
* manual/errno.texi (Error Codes): Revert last change for now.

7
elf/dl-support.c
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@ -136,6 +136,8 @@ int (*_dl_make_stack_executable_hook) (void **) internal_function
#ifdef NEED_DL_SYSINFO
/* Needed for improved syscall handling on at least x86/Linux. */
uintptr_t _dl_sysinfo = DL_SYSINFO_DEFAULT;
#endif
#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
/* Address of the ELF headers in the vsyscall page. */
const ElfW(Ehdr) *_dl_sysinfo_dso;
#endif
@ -183,6 +185,11 @@ _dl_aux_init (ElfW(auxv_t) *av)
case AT_SYSINFO:
GL(dl_sysinfo) = av->a_un.a_val;
break;
#endif
#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
case AT_SYSINFO_EHDR:
GL(dl_sysinfo_dso) = av->a_un.a_ptr;
break;
#endif
case AT_UID:
uid ^= av->a_un.a_val;

8
elf/rtld.c
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@ -1274,7 +1274,7 @@ ERROR: ld.so: object '%s' from %s cannot be preloaded: ignored.\n",
assert (i == npreloads);
}
#ifdef NEED_DL_SYSINFO
#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
struct link_map *sysinfo_map = NULL;
if (GLRO(dl_sysinfo_dso) != NULL)
{
@ -1338,9 +1338,11 @@ ERROR: ld.so: object '%s' from %s cannot be preloaded: ignored.\n",
}
/* We have a prelinked DSO preloaded by the system. */
sysinfo_map = l;
# ifdef NEED_DL_SYSINFO
if (GLRO(dl_sysinfo) == DL_SYSINFO_DEFAULT)
GLRO(dl_sysinfo) = GLRO(dl_sysinfo_dso)->e_entry + l->l_addr;
sysinfo_map = l;
# endif
}
}
#endif
@ -1389,7 +1391,7 @@ ERROR: ld.so: object '%s' from %s cannot be preloaded: ignored.\n",
GL(dl_rtld_map).l_next = (i + 1 < main_map->l_searchlist.r_nlist
? main_map->l_searchlist.r_list[i + 1]
: NULL);
#ifdef NEED_DL_SYSINFO
#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
if (sysinfo_map != NULL
&& GL(dl_rtld_map).l_prev->l_next == sysinfo_map
&& GL(dl_rtld_map).l_next != sysinfo_map)

4
sysdeps/generic/dl-sysdep.c
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@ -161,6 +161,8 @@ _dl_sysdep_start (void **start_argptr,
case AT_SYSINFO:
new_sysinfo = av->a_un.a_val;
break;
#endif
#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
case AT_SYSINFO_EHDR:
GLRO(dl_sysinfo_dso) = av->a_un.a_ptr;
break;
@ -287,10 +289,8 @@ _dl_show_auxv (void)
[AT_UCACHEBSIZE - 2] = { "AT_UCACHEBSIZE: 0x", hex },
[AT_IGNOREPPC - 2] = { "AT_IGNOREPPC", ignore },
[AT_SECURE - 2] = { "AT_SECURE: ", dec },
#ifdef NEED_DL_SYSINFO
[AT_SYSINFO - 2] = { "AT_SYSINFO: 0x", hex },
[AT_SYSINFO_EHDR - 2] = { "AT_SYSINFO_EHDR: 0x", hex },
#endif
};
unsigned int idx = (unsigned int) (av->a_type - 2);

2
sysdeps/generic/ldsodefs.h
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@ -470,7 +470,9 @@ struct rtld_global_ro
#ifdef NEED_DL_SYSINFO
/* Syscall handling improvements. This is very specific to x86. */
EXTERN uintptr_t _dl_sysinfo;
#endif
#if defined NEED_DL_SYSINFO || defined NEED_DL_SYSINFO_DSO
/* The vsyscall page is a virtual DSO pre-mapped by the kernel.
This points to its ELF header. */
EXTERN const ElfW(Ehdr) *_dl_sysinfo_dso;