diff options
| author | Joakim Tjernlund <joakim.tjernlund@transmode.se> | 2004-11-02 08:14:49 +0000 |
|---|---|---|
| committer | Joakim Tjernlund <joakim.tjernlund@transmode.se> | 2004-11-02 08:14:49 +0000 |
| commit | dc0f822bfed430e5b4f87f27c2e63171fa5fba28 (patch) | |
| tree | 01eda5fa3c42d0c8b114f76622b4794a7735aa41 /ldso/libdl/libdl.c | |
| parent | f8f7b102217864ea382a46bb9ad173b3493e5cae (diff) | |
- Remove dynamic_size from struct elf_resolve.
- Replace all open coded dynamic handling with a function. Reduces size.
- Fold special MIPS dynamic code into the dynamic_info item.
- Add RELRO support.
- Support linking with "-z now".
- prepare for DT_RELACOUNT/DT_RELCOUNT optimization.
- Add -z now to ld.so linking, this is what ld.so does anyway so
let the linker know that.
Diffstat (limited to 'ldso/libdl/libdl.c')
| -rw-r--r-- | ldso/libdl/libdl.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/ldso/libdl/libdl.c b/ldso/libdl/libdl.c index 21dbd86ce..1bb68bdc8 100644 --- a/ldso/libdl/libdl.c +++ b/ldso/libdl/libdl.c @@ -47,6 +47,8 @@ extern struct elf_resolve * _dl_check_if_named_library_is_loaded(const char *, i __attribute__ ((__weak__)); extern int _dl_fixup(struct dyn_elf *rpnt, int lazy) __attribute__ ((__weak__)); +extern void _dl_protect_relro(struct elf_resolve * tpnt) + __attribute__ ((__weak__)); extern int _dl_errno __attribute__ ((__weak__)); extern struct dyn_elf *_dl_symbol_tables __attribute__ ((__weak__)); extern struct dyn_elf *_dl_handles __attribute__ ((__weak__)); @@ -128,7 +130,7 @@ void __attribute__ ((destructor)) dl_cleanup(void) void *dlopen(const char *libname, int flag) { struct elf_resolve *tpnt, *tfrom, *tcurr; - struct dyn_elf *dyn_chain, *rpnt = NULL, *dyn_ptr; + struct dyn_elf *dyn_chain, *rpnt = NULL, *dyn_ptr, *relro_ptr; struct dyn_elf *dpnt; ElfW(Addr) from; struct elf_resolve *tpnt1; @@ -168,6 +170,8 @@ void *dlopen(const char *libname, int flag) tfrom = tpnt; } for(rpnt = _dl_symbol_tables; rpnt->next; rpnt=rpnt->next); + + relro_ptr = rpnt; /* Try to load the specified library */ #ifdef __SUPPORT_LD_DEBUG__ if(_dl_debug) @@ -311,6 +315,10 @@ void *dlopen(const char *libname, int flag) if (_dl_fixup(dyn_chain, now_flag)) goto oops; + for (rpnt = relro_ptr->next; rpnt; rpnt = rpnt->next) { + if (rpnt->dyn->relro_size) + _dl_protect_relro(rpnt->dyn); + } /* TODO: Should we set the protections of all pages back to R/O now ? */ |