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* elf/rtld.c (_dl_start_final): Move _begin, _end decls outside the fn.

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(_dl_start) [DONT_USE_BOOTSTRAP_MAP]: Use &_begin instead of l_addr to
	find the ELF header.
This commit is contained in:
Roland McGrath 2002-09-12 10:12:33 +00:00
parent 75aafc716b
commit 65da9563c7
2 changed files with 19 additions and 4 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2002-09-12 Roland McGrath <roland@redhat.com> 2002-09-12 Roland McGrath <roland@redhat.com>
* elf/rtld.c (_dl_start_final): Move _begin, _end decls outside the fn.
(_dl_start) [DONT_USE_BOOTSTRAP_MAP]: Use &_begin instead of l_addr to
find the ELF header.
* elf/rtld.c (dl_main) [USE_TLS]: Adjust l_tls_initimage of main * elf/rtld.c (dl_main) [USE_TLS]: Adjust l_tls_initimage of main
executable if needed, in case it's actually a shared object. executable if needed, in case it's actually a shared object.

19
elf/rtld.c
View File

@ -150,6 +150,11 @@ static ElfW(Addr) _dl_start_final (void *arg,
struct link_map *bootstrap_map_p); struct link_map *bootstrap_map_p);
#endif #endif
/* These defined magically in the linker script. */
extern char _begin[] attribute_hidden;
extern char _end[] attribute_hidden;
#ifdef RTLD_START #ifdef RTLD_START
RTLD_START RTLD_START
#else #else
@ -180,8 +185,6 @@ _dl_start_final (void *arg, struct link_map *bootstrap_map_p)
#endif #endif
{ {
ElfW(Addr) start_addr; ElfW(Addr) start_addr;
extern char _begin[] attribute_hidden;
extern char _end[] attribute_hidden;
if (HP_TIMING_AVAIL) if (HP_TIMING_AVAIL)
{ {
@ -313,9 +316,17 @@ _dl_start (void *arg)
bootstrap_map.l_tls_modid = 0; bootstrap_map.l_tls_modid = 0;
# endif # endif
/* Get the dynamic linkers program header. */ /* Get the dynamic linker's own program header. First we need the ELF
file header. The `_begin' symbol created by the linker script points
to it. When we have something like GOTOFF relocs, we can use a plain
reference to find the runtime address. Without that, we have to rely
on the `l_addr' value, which is not the value we want when prelinked. */
#ifdef DONT_USE_BOOTSTRAP_MAP
ehdr = (ElfW(Ehdr) *) &_begin;
#else
ehdr = (ElfW(Ehdr) *) bootstrap_map.l_addr; ehdr = (ElfW(Ehdr) *) bootstrap_map.l_addr;
phdr = (ElfW(Phdr) *) (bootstrap_map.l_addr + ehdr->e_phoff); #endif
phdr = (ElfW(Phdr) *) ((ElfW(Addr)) ehdr + ehdr->e_phoff);
for (cnt = 0; cnt < ehdr->e_phnum; ++cnt) for (cnt = 0; cnt < ehdr->e_phnum; ++cnt)
if (phdr[cnt].p_type == PT_TLS) if (phdr[cnt].p_type == PT_TLS)
{ {