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ld.so: Don't fill the DT_DEBUG entry in ld.so [BZ #28129]

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Linker creates the DT_DEBUG entry only in executables.  Don't fill the
non-existent DT_DEBUG entry in ld.so with the run-time address of the
r_debug structure.  This fixes BZ #28129.
This commit is contained in:
H.J. Lu 2021-08-02 13:52:36 -07:00
parent 47252e4336
commit 3234a31b48
1 changed files with 0 additions and 6 deletions
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6
elf/rtld.c
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@ -1761,17 +1761,11 @@ dl_main (const ElfW(Phdr) *phdr,
#ifdef ELF_MACHINE_DEBUG_SETUP
/* Some machines (e.g. MIPS) don't use DT_DEBUG in this way. */
ELF_MACHINE_DEBUG_SETUP (main_map, r);
ELF_MACHINE_DEBUG_SETUP (&GL(dl_rtld_map), r);
#else
if (main_map->l_info[DT_DEBUG] != NULL)
/* There is a DT_DEBUG entry in the dynamic section. Fill it in
with the run-time address of the r_debug structure */
main_map->l_info[DT_DEBUG]->d_un.d_ptr = (ElfW(Addr)) r;
/* Fill in the pointer in the dynamic linker's own dynamic section, in
case you run gdb on the dynamic linker directly. */
if (GL(dl_rtld_map).l_info[DT_DEBUG] != NULL)
GL(dl_rtld_map).l_info[DT_DEBUG]->d_un.d_ptr = (ElfW(Addr)) r;
#endif
/* We start adding objects. */