/* Forward declarations for stuff defined in ld_hash.h */
struct dyn_elf;
struct elf_resolve;
+struct r_scope_elem;
#include <dl-defs.h>
#ifdef __LDSO_CACHE_SUPPORT__
extern int _dl_map_cache(void);
extern int _dl_unmap_cache(void);
#else
-static inline void _dl_map_cache(void) { }
-static inline void _dl_unmap_cache(void) { }
+static __inline__ void _dl_map_cache(void) { }
+static __inline__ void _dl_unmap_cache(void) { }
#endif
+#define DL_RESOLVE_SECURE 0x0001
+#define DL_RESOLVE_NOLOAD 0x0002
/* Function prototypes for non-static stuff in readelflib1.c */
extern void _dl_parse_lazy_relocation_information(struct dyn_elf *rpnt,
unsigned long rel_addr, unsigned long rel_size);
extern int _dl_parse_relocation_information(struct dyn_elf *rpnt,
- unsigned long rel_addr, unsigned long rel_size);
-extern struct elf_resolve * _dl_load_shared_library(int secure,
+ struct r_scope_elem *scope, unsigned long rel_addr, unsigned long rel_size);
+extern struct elf_resolve * _dl_load_shared_library(unsigned rflags,
struct dyn_elf **rpnt, struct elf_resolve *tpnt, char *full_libname,
int trace_loaded_objects);
-extern struct elf_resolve * _dl_load_elf_shared_library(int secure,
- struct dyn_elf **rpnt, char *libname);
+extern struct elf_resolve * _dl_load_elf_shared_library(unsigned rflags,
+ struct dyn_elf **rpnt, const char *libname);
extern struct elf_resolve *_dl_check_if_named_library_is_loaded(const char *full_libname,
int trace_loaded_objects);
extern int _dl_linux_resolve(void);
-extern int _dl_fixup(struct dyn_elf *rpnt, int flag);
+extern int _dl_fixup(struct dyn_elf *rpnt, struct r_scope_elem *scope, int flag);
extern void _dl_protect_relro (struct elf_resolve *l);
/*
#endif
/* OS and/or GNU dynamic extensions */
-#define OS_NUM 1
-#define DT_RELCONT_IDX DT_NUM
+
+#define OS_NUM_BASE 1 /* for DT_RELOCCOUNT */
+
+#ifdef __LDSO_GNU_HASH_SUPPORT__
+# 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_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 void _dl_parse_dynamic_info(ElfW(Dyn) *dpnt, unsigned long dynamic_info[], void *debug_addr, ElfW(Addr) load_off);
+extern unsigned int _dl_parse_dynamic_info(ElfW(Dyn) *dpnt, unsigned long dynamic_info[],
+ void *debug_addr, DL_LOADADDR_TYPE load_off);
static __always_inline
-void __dl_parse_dynamic_info(ElfW(Dyn) *dpnt, unsigned long dynamic_info[], void *debug_addr, ElfW(Addr) load_off)
+unsigned int __dl_parse_dynamic_info(ElfW(Dyn) *dpnt, unsigned long dynamic_info[],
+ void *debug_addr, DL_LOADADDR_TYPE load_off)
{
+ unsigned int rtld_flags = 0;
+
for (; dpnt->d_tag; dpnt++) {
if (dpnt->d_tag < DT_NUM) {
dynamic_info[dpnt->d_tag] = dpnt->d_un.d_val;
} else if (dpnt->d_tag < DT_LOPROC) {
if (dpnt->d_tag == DT_RELOCCOUNT)
dynamic_info[DT_RELCONT_IDX] = dpnt->d_un.d_val;
- if (dpnt->d_tag == DT_FLAGS_1 &&
- (dpnt->d_un.d_val & DF_1_NOW))
- dynamic_info[DT_BIND_NOW] = 1;
+ if (dpnt->d_tag == DT_FLAGS_1) {
+ if (dpnt->d_un.d_val & DF_1_NOW)
+ dynamic_info[DT_BIND_NOW] = 1;
+ if (dpnt->d_un.d_val & DF_1_NODELETE)
+ rtld_flags |= RTLD_NODELETE;
+ }
+#ifdef __LDSO_GNU_HASH_SUPPORT__
+ 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 {
#define ADJUST_DYN_INFO(tag, load_off) \
do { \
if (dynamic_info[tag]) \
- dynamic_info[tag] += load_off; \
- } while(0)
- ADJUST_DYN_INFO(DT_HASH, load_off);
- ADJUST_DYN_INFO(DT_PLTGOT, load_off);
- ADJUST_DYN_INFO(DT_STRTAB, load_off);
- ADJUST_DYN_INFO(DT_SYMTAB, load_off);
- ADJUST_DYN_INFO(DT_RELOC_TABLE_ADDR, load_off);
- ADJUST_DYN_INFO(DT_JMPREL, load_off);
+ dynamic_info[tag] = (unsigned long) DL_RELOC_ADDR(load_off, dynamic_info[tag]); \
+ } while (0)
+ /* Don't adjust .dynamic unnecessarily. For FDPIC targets,
+ we'd have to walk all the loadsegs to find out if it was
+ actually unnecessary, so skip this optimization. */
+#if !defined __FDPIC__ && !defined __DSBT__
+ if (load_off != 0)
+#endif
+ {
+ ADJUST_DYN_INFO(DT_HASH, load_off);
+ ADJUST_DYN_INFO(DT_PLTGOT, load_off);
+ ADJUST_DYN_INFO(DT_STRTAB, load_off);
+ ADJUST_DYN_INFO(DT_SYMTAB, load_off);
+ ADJUST_DYN_INFO(DT_RELOC_TABLE_ADDR, load_off);
+ ADJUST_DYN_INFO(DT_JMPREL, load_off);
+#ifdef __LDSO_GNU_HASH_SUPPORT__
+ ADJUST_DYN_INFO(DT_GNU_HASH_IDX, load_off);
+#endif
+ }
+#ifdef __DSBT__
+ /* Get the mapped address of the DSBT base. */
+ ADJUST_DYN_INFO(DT_DSBT_BASE_IDX, load_off);
+
+ /* Initialize loadmap dsbt info. */
+ load_off.map->dsbt_table = (void *)dynamic_info[DT_DSBT_BASE_IDX];
+ load_off.map->dsbt_size = dynamic_info[DT_DSBT_SIZE_IDX];
+ load_off.map->dsbt_index = dynamic_info[DT_DSBT_INDEX_IDX];
+#endif
#undef ADJUST_DYN_INFO
+ return rtld_flags;
}
/* Reloc type classes as returned by elf_machine_type_class().
#endif
#define ELF_RTYPE_CLASS_PLT (0x1)
+/* dlsym() calls _dl_find_hash with this value, that enables
+ DL_FIND_HASH_VALUE to return something different than the symbol
+ itself, e.g., a function descriptor. */
+#define ELF_RTYPE_CLASS_DLSYM 0x80000000
+
/* Convert between the Linux flags for page protections and the
ones specified in the ELF standard. */
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