diff options
| author | Dmitry Chestnykh <dm.chestnykh@gmail.com> | 2024-02-06 09:13:41 +0300 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2024-02-07 13:47:28 +0100 |
| commit | 395f920c0a29dd565a66b268ea00fc444ae64086 (patch) | |
| tree | 78e0c6905d3f98b1e53c5c562dea9f99c4e69983 /include/elf.h | |
| parent | 0fef8e7e0661daa17a9ca17b087f55dcb752b378 (diff) | |
ld.so: Add support of DT_RELR relocation format.
Nowadays modern libcs like Glibc and musl currently
support processing of RELATIVE relocations compressed
with DT_RELR format. However I have noticed that uClibc-ng
doesn't support this feature and if the source will be linked with
`-Wl,-z,pack-relative-relos` (bfd) or `-Wl,--pack-dyn-relocs=relr`
(lld) then ld.so cannot properly load the produced DSO.
This patch is intended to fix this issue and adds applying
of DT_RELR relative relocation.
Signed-off-by: Dmitry Chestnykh <dm.chestnykh@gmail.com>
Diffstat (limited to 'include/elf.h')
| -rw-r--r-- | include/elf.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/elf.h b/include/elf.h index b7edbade2..c2efa9978 100644 --- a/include/elf.h +++ b/include/elf.h @@ -60,6 +60,9 @@ typedef uint16_t Elf64_Section; typedef Elf32_Half Elf32_Versym; typedef Elf64_Half Elf64_Versym; +/* Type for relative relocations in DT_RELR format */ +typedef Elf32_Word Elf32_Relr; +typedef Elf64_Xword Elf64_Relr; /* The ELF file header. This appears at the start of every ELF file. */ @@ -818,7 +821,10 @@ typedef struct #define DT_ENCODING 32 /* Start of encoded range */ #define DT_PREINIT_ARRAY 32 /* Array with addresses of preinit fct*/ #define DT_PREINIT_ARRAYSZ 33 /* size in bytes of DT_PREINIT_ARRAY */ -#define DT_NUM 34 /* Number used */ +#define DT_RELRSZ 35 /* Size in bytes, of DT_RELR table */ +#define DT_RELR 36 /* Address of Relr relocs */ +#define DT_RELRENT 37 /* Size in bytes of one DT_RELR entry */ +#define DT_NUM 38 /* Number used */ #define DT_LOOS 0x6000000d /* Start of OS-specific */ #define DT_HIOS 0x6ffff000 /* End of OS-specific */ #define DT_LOPROC 0x70000000 /* Start of processor-specific */ |