diff options
| author | Filippo Arcidiacono <filippo.arcidiacono@st.com> | 2010-08-02 17:23:35 +0200 |
|---|---|---|
| committer | Carmelo Amoroso <carmelo.amoroso@st.com> | 2010-09-17 16:13:17 +0200 |
| commit | a33796043bdef5345bc00a528c942f91a87af8e9 (patch) | |
| tree | d69b340439feac78601648c29efb34d9b889e5e8 /ldso/include/dl-elf.h | |
| parent | 02f56b3ae9f620528c3c1bb42662b4499d19f383 (diff) | |
ldso: Add runtime prelink support
Added runtime prelink support to be able to run a prelinked
application; at process startup only the conflicts will be relocated.
This speed up the startup time.
Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
Diffstat (limited to 'ldso/include/dl-elf.h')
| -rw-r--r-- | ldso/include/dl-elf.h | 43 |
1 files changed, 40 insertions, 3 deletions
diff --git a/ldso/include/dl-elf.h b/ldso/include/dl-elf.h index 3e8586444..40c88b9da 100644 --- a/ldso/include/dl-elf.h +++ b/ldso/include/dl-elf.h @@ -85,24 +85,47 @@ extern void _dl_protect_relro (struct elf_resolve *l); #endif /* OS and/or GNU dynamic extensions */ + +#define OS_NUM_BASE 1 /* for DT_RELOCCOUNT */ + #ifdef __LDSO_GNU_HASH_SUPPORT__ -# define OS_NUM 2 /* for DT_RELOCCOUNT and DT_GNU_HASH entries */ +# define OS_NUM_GNU_HASH 1 /* for DT_GNU_HASH entry */ +#else +# define OS_NUM_GNU_HASH 0 +#endif + +#ifdef __LDSO_PRELINK_SUPPORT__ +# define OS_NUM_PRELINK 6 /* for DT_GNU_PRELINKED entry */ #else -# define OS_NUM 1 /* for DT_RELOCCOUNT entry */ +# define OS_NUM_PRELINK 0 #endif +#define OS_NUM (OS_NUM_BASE + OS_NUM_GNU_HASH + OS_NUM_PRELINK) + #ifndef ARCH_DYNAMIC_INFO /* define in arch specific code, if needed */ # define ARCH_NUM 0 #endif -#define DYNAMIC_SIZE (DT_NUM+OS_NUM+ARCH_NUM) +#define DYNAMIC_SIZE (DT_NUM + OS_NUM + ARCH_NUM) /* Keep ARCH specific entries into dynamic section at the end of the array */ #define DT_RELCONT_IDX (DYNAMIC_SIZE - OS_NUM - ARCH_NUM) #ifdef __LDSO_GNU_HASH_SUPPORT__ /* GNU hash comes just after the relocation count */ # define DT_GNU_HASH_IDX (DT_RELCONT_IDX + 1) +#else +# define DT_GNU_HASH_IDX DT_RELCONT_IDX +#endif + +#ifdef __LDSO_PRELINK_SUPPORT__ +/* GNU prelink comes just after the GNU hash if present */ +#define DT_GNU_PRELINKED_IDX (DT_GNU_HASH_IDX + 1) +#define DT_GNU_CONFLICT_IDX (DT_GNU_HASH_IDX + 2) +#define DT_GNU_CONFLICTSZ_IDX (DT_GNU_HASH_IDX + 3) +#define DT_GNU_LIBLIST_IDX (DT_GNU_HASH_IDX + 4) +#define DT_GNU_LIBLISTSZ_IDX (DT_GNU_HASH_IDX + 5) +#define DT_CHECKSUM_IDX (DT_GNU_HASH_IDX + 6) #endif extern unsigned int _dl_parse_dynamic_info(ElfW(Dyn) *dpnt, unsigned long dynamic_info[], @@ -151,6 +174,20 @@ unsigned int __dl_parse_dynamic_info(ElfW(Dyn) *dpnt, unsigned long dynamic_info if (dpnt->d_tag == DT_GNU_HASH) dynamic_info[DT_GNU_HASH_IDX] = dpnt->d_un.d_ptr; #endif +#ifdef __LDSO_PRELINK_SUPPORT__ + if (dpnt->d_tag == DT_GNU_PRELINKED) + dynamic_info[DT_GNU_PRELINKED_IDX] = dpnt->d_un.d_val; + if (dpnt->d_tag == DT_GNU_CONFLICT) + dynamic_info[DT_GNU_CONFLICT_IDX] = dpnt->d_un.d_ptr; + if (dpnt->d_tag == DT_GNU_CONFLICTSZ) + dynamic_info[DT_GNU_CONFLICTSZ_IDX] = dpnt->d_un.d_val; + if (dpnt->d_tag == DT_GNU_LIBLIST) + dynamic_info[DT_GNU_LIBLIST_IDX] = dpnt->d_un.d_ptr; + if (dpnt->d_tag == DT_GNU_LIBLISTSZ) + dynamic_info[DT_GNU_LIBLISTSZ_IDX] = dpnt->d_un.d_val; + if (dpnt->d_tag == DT_CHECKSUM) + dynamic_info[DT_CHECKSUM_IDX] = dpnt->d_un.d_val; +#endif } #ifdef ARCH_DYNAMIC_INFO else { |