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| author | H.J. Lu <hjl.tools@gmail.com> | 2021-09-16 08:15:29 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-09-22 11:12:43 -0700 |
| commit | b413280cfb16834450f66f554bc0d618bb513851 (patch) | |
| tree | fda69976f225c3085c1da42c9b9ab191fae6f61f /sysdeps/mips | |
| parent | 4eff749e8f06d8f6c5fc8b37299e9e0409ed80ec (diff) | |
| download | glibc-b413280cfb16834450f66f554bc0d618bb513851.tar glibc-b413280cfb16834450f66f554bc0d618bb513851.tar.gz glibc-b413280cfb16834450f66f554bc0d618bb513851.tar.bz2 glibc-b413280cfb16834450f66f554bc0d618bb513851.zip | |
ld.so: Replace DL_RO_DYN_SECTION with dl_relocate_ld [BZ #28340]
We can't relocate entries in dynamic section if it is readonly:
1. Add a l_ld_readonly field to struct link_map to indicate if dynamic
section is readonly and set it based on p_flags of PT_DYNAMIC segment.
2. Replace DL_RO_DYN_SECTION with dl_relocate_ld to decide if dynamic
section should be relocated.
3. Remove DL_RO_DYN_TEMP_CNT.
4. Don't use a static dynamic section to make readonly dynamic section
in vDSO writable.
5. Remove the temp argument from elf_get_dynamic_info.
This fixes BZ #28340.
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Diffstat (limited to 'sysdeps/mips')
| -rw-r--r-- | sysdeps/mips/dl-relocate-ld.h | 32 | ||||
| -rw-r--r-- | sysdeps/mips/ldsodefs.h | 4 |
2 files changed, 32 insertions, 4 deletions
diff --git a/sysdeps/mips/dl-relocate-ld.h b/sysdeps/mips/dl-relocate-ld.h new file mode 100644 index 0000000000..0c18d9a567 --- /dev/null +++ b/sysdeps/mips/dl-relocate-ld.h @@ -0,0 +1,32 @@ +/* Check if dynamic section should be relocated. MIPS version. + Copyright (C) 2021 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef _DL_RELOCATE_LD_H +#define _DL_RELOCATE_LD_H + +/* Return true if dynamic section in the shared library L should be + relocated. */ + +static inline bool +dl_relocate_ld (const struct link_map *l) +{ + /* Never relocate dynamic section. */ + return false; +} + +#endif /* _DL_RELOCATE_LD_H */ diff --git a/sysdeps/mips/ldsodefs.h b/sysdeps/mips/ldsodefs.h index 4db7c60e38..36fd09a8bd 100644 --- a/sysdeps/mips/ldsodefs.h +++ b/sysdeps/mips/ldsodefs.h @@ -75,10 +75,6 @@ struct La_mips_64_retval; struct La_mips_64_retval *, \ const char *); -/* The MIPS ABI specifies that the dynamic section has to be read-only. */ - -#define DL_RO_DYN_SECTION 1 - #include_next <ldsodefs.h> /* The 64-bit MIPS ELF ABI uses an unusual reloc format. Each |