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| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2020-06-22 10:56:38 +0100 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2020-07-08 14:28:53 +0100 |
| commit | c7aa8596de86fb667914ccb95c10495ad056ff96 (patch) | |
| tree | 1d49bc2092f2cbb06b761f7f047626e45195082d /sysdeps/generic/ldsodefs.h | |
| parent | c1e63c7214aaef99039068da384a0ab3abc176f2 (diff) | |
| download | glibc-c7aa8596de86fb667914ccb95c10495ad056ff96.tar.gz glibc-c7aa8596de86fb667914ccb95c10495ad056ff96.tar.xz glibc-c7aa8596de86fb667914ccb95c10495ad056ff96.zip | |
rtld: Clean up PT_NOTE and add PT_GNU_PROPERTY handling
Add generic code to handle PT_GNU_PROPERTY notes. Invalid content is ignored, _dl_process_pt_gnu_property is always called after PT_LOAD segments are mapped and it has no failure modes. Currently only one NT_GNU_PROPERTY_TYPE_0 note is handled, which contains target specific properties: the _dl_process_gnu_property hook is called for each property. The old _dl_process_pt_note and _rtld_process_pt_note differ in how the program header is read. The old _dl_process_pt_note is called before PT_LOAD segments are mapped and _rtld_process_pt_note is called after PT_LOAD segments are mapped. The old _rtld_process_pt_note is removed and _dl_process_pt_note is always called after PT_LOAD segments are mapped and now it has no failure modes. The program headers are scanned backwards so that PT_NOTE can be skipped if PT_GNU_PROPERTY exists. Co-Authored-By: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/generic/ldsodefs.h')
| -rw-r--r-- | sysdeps/generic/ldsodefs.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index d08b97a5ef..c525ffa12c 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -910,6 +910,10 @@ extern void _dl_setup_hash (struct link_map *map) attribute_hidden; extern void _dl_rtld_di_serinfo (struct link_map *loader, Dl_serinfo *si, bool counting); +/* Process PT_GNU_PROPERTY program header PH in module L after + PT_LOAD segments are mapped. */ +void _dl_process_pt_gnu_property (struct link_map *l, const ElfW(Phdr) *ph); + /* Search loaded objects' symbol tables for a definition of the symbol referred to by UNDEF. *SYM is the symbol table entry containing the |