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-rw-r--r--ldso/include/dl-defs.h2
-rw-r--r--ldso/include/dl-elf.h50
-rw-r--r--ldso/include/dl-hash.h33
-rw-r--r--ldso/include/ldso.h9
4 files changed, 79 insertions, 15 deletions
diff --git a/ldso/include/dl-defs.h b/ldso/include/dl-defs.h
index 2d6303cfe..cbbaa3cea 100644
--- a/ldso/include/dl-defs.h
+++ b/ldso/include/dl-defs.h
@@ -225,7 +225,7 @@ typedef struct {
/* Similar to DL_LOADADDR_UNMAP, but used for libraries that have been
dlopen()ed successfully, when they're dlclose()d. */
#ifndef DL_LIB_UNMAP
-# define DL_LIB_UNMAP(LIB, LEN) (DL_LOADADDR_UNMAP ((LIB)->loadaddr, (LEN)))
+# define DL_LIB_UNMAP(LIB, LEN) (DL_LOADADDR_UNMAP ((LIB)->mapaddr, (LEN)))
#endif
/* Define this to verify that a library named LIBNAME, whose ELF
diff --git a/ldso/include/dl-elf.h b/ldso/include/dl-elf.h
index cbb2100b1..40c88b9da 100644
--- a/ldso/include/dl-elf.h
+++ b/ldso/include/dl-elf.h
@@ -15,6 +15,7 @@
/* 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__
@@ -30,16 +31,16 @@ static __inline__ void _dl_unmap_cache(void) { }
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);
+ struct r_scope_elem *scope, unsigned long rel_addr, unsigned long rel_size);
extern struct elf_resolve * _dl_load_shared_library(int secure,
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);
+ 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);
/*
@@ -84,24 +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[],
@@ -150,6 +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 {
diff --git a/ldso/include/dl-hash.h b/ldso/include/dl-hash.h
index 34333f40f..e138e1d4b 100644
--- a/ldso/include/dl-hash.h
+++ b/ldso/include/dl-hash.h
@@ -25,6 +25,19 @@ struct dyn_elf {
struct dyn_elf * prev;
};
+struct sym_val {
+ const ElfW(Sym) *s;
+ struct elf_resolve *m;
+};
+
+/* Structure to describe a single list of scope elements. The lookup
+ functions get passed an array of pointers to such structures. */
+struct r_scope_elem {
+ struct elf_resolve **r_list; /* Array of maps for the scope. */
+ unsigned int r_nlist; /* Number of entries in the scope. */
+ struct r_scope_elem *next;
+};
+
struct elf_resolve {
/* These entries must be in this order to be compatible with the interface used
by gdb to obtain the list of symbols. */
@@ -60,8 +73,13 @@ struct elf_resolve {
#endif
ElfW(Addr) mapaddr;
+#ifdef __LDSO_STANDALONE_SUPPORT__
+ /* Store the entry point from the ELF header (e_entry) */
+ ElfW(Addr) l_entry;
+#endif
enum {elf_lib, elf_executable,program_interpreter, loaded_file} libtype;
- struct dyn_elf * symbol_scope;
+ /* This is the local scope of the shared object */
+ struct r_scope_elem symbol_scope;
unsigned short usage_count;
unsigned short int init_flag;
unsigned long rtld_flags; /* RTLD_GLOBAL, RTLD_NOW etc. */
@@ -128,6 +146,7 @@ struct elf_resolve {
#define INIT_FUNCS_CALLED 0x000004
#define FINI_FUNCS_CALLED 0x000008
#define DL_OPENED 0x000010
+#define DL_RESERVED 0x000020
extern struct dyn_elf * _dl_symbol_tables;
extern struct elf_resolve * _dl_loaded_modules;
@@ -139,17 +158,17 @@ extern struct elf_resolve * _dl_add_elf_hash_table(const char * libname,
/* Only need extra arg with some configurations */
#if !((defined(USE_TLS) && USE_TLS) || defined __FDPIC__)
-# define _dl_lookup_hash(n, r, m, c, t) _dl_lookup_hash(n, r, m, c)
+# define _dl_lookup_hash(n, r, m, s, c, t) _dl_lookup_hash(n, r, m, s, c)
#endif
-extern char *_dl_lookup_hash(const char *name, struct dyn_elf *rpnt,
- struct elf_resolve *mytpnt, int type_class,
+extern char *_dl_lookup_hash(const char *name, struct r_scope_elem *scope,
+ struct elf_resolve *mytpnt, struct sym_val *symbol, int type_class,
struct elf_resolve **tpntp);
-static __always_inline char *_dl_find_hash(const char *name, struct dyn_elf *rpnt,
- struct elf_resolve *mytpnt, int type_class,
+static __always_inline char *_dl_find_hash(const char *name, struct r_scope_elem *scope,
+ struct elf_resolve *mytpnt, struct sym_val *symbol, int type_class,
struct elf_resolve **tpntp)
{
- return _dl_lookup_hash(name, rpnt, mytpnt, type_class, tpntp);
+ return _dl_lookup_hash(name, scope, mytpnt, symbol, type_class, tpntp);
}
extern int _dl_linux_dynamic_link(void);
diff --git a/ldso/include/ldso.h b/ldso/include/ldso.h
index 69b5dd75a..9aa610e7b 100644
--- a/ldso/include/ldso.h
+++ b/ldso/include/ldso.h
@@ -27,6 +27,7 @@
/* Pull in compiler and arch stuff */
#include <stdlib.h>
#include <stdarg.h>
+#include <stddef.h> /* for ptrdiff_t */
#define _FCNTL_H
#include <bits/fcntl.h>
#include <bits/wordsize.h>
@@ -72,6 +73,12 @@ extern char *_dl_preload; /* Things to be loaded before the libs */
extern char *_dl_ldsopath; /* Where the shared lib loader was found */
extern const char *_dl_progname; /* The name of the executable being run */
extern size_t _dl_pagesize; /* Store the page size for use later */
+#ifdef __LDSO_PRELINK_SUPPORT__
+extern char *_dl_trace_prelink; /* Library for prelinking trace */
+extern struct elf_resolve *_dl_trace_prelink_map; /* Library map for prelinking trace */
+#else
+#define _dl_trace_prelink 0
+#endif
#if defined(USE_TLS) && USE_TLS
extern void _dl_add_to_slotinfo (struct link_map *l);
@@ -144,7 +151,7 @@ extern void _dl_dprintf(int, const char *, ...);
# define DL_GET_READY_TO_RUN_EXTRA_ARGS
#endif
-extern void _dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
+extern void *_dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
ElfW(auxv_t) auxvt[AT_EGID + 1], char **envp, char **argv
DL_GET_READY_TO_RUN_EXTRA_PARMS);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 01:19:58 +0000