diff options
28 files changed, 958 insertions, 284 deletions
@@ -294,6 +294,15 @@ endef cmd_hcompile.u = $(HOSTCC) $(filter-out $(PHONY),$^) $(DEPS-$(notdir $@)) -o $@ $(BUILD_LDFLAGS) $(BUILD_LDFLAGS-$(notdir $(^D))) $(BUILD_LDFLAGS-$(notdir $@)) $(BUILD_CFLAGS) $(BUILD_CFLAGS-$(notdir $(^D))) $(BUILD_CFLAGS-$(notdir $@)) cmd_hcompile.o = $(HOSTCC) $(filter-out $(PHONY),$<) $(DEPS-$(notdir $@)) -c -o $@ $(BUILD_CFLAGS) $(BUILD_CFLAGS-$(notdir $(^D))) $(BUILD_CFLAGS-$(notdir $@)) +define create-lds + $(Q)$(RM) $@.lds + $(Q)$(CC) -nostdlib -nostartfiles -shared -Wl,-z,combreloc \ + -Wl,-z,relro -Wl,--hash-style=gnu -Wl,-z,defs \ + -Wl,--verbose 2>&1 | LC_ALL=C \ + sed -e '/^=========/,/^=========/!d;/^=========/d' \ + -e 's/\. = .* + SIZEOF_HEADERS;/& _begin = . - SIZEOF_HEADERS;/' > $@.lds +endef + define link.so $(Q)$(RM) $@ $@.$(2) $(dir $@)$(1) @$(disp_ld) diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in index aa459e06a..35ce854dd 100644 --- a/extra/Configs/Config.in +++ b/extra/Configs/Config.in @@ -342,6 +342,34 @@ config LDSO_BASE_FILENAME WARNING: Changing the default prefix could cause problems with binutils' ld ! +config LDSO_STANDALONE_SUPPORT + bool "Dynamic linker stand-alone mode support" + depends on HAVE_SHARED + default n + help + The dynamic linker can be run either indirectly through running some + dynamically linked program or library (in which case no command line + options to the dynamic linker can be passed and, in the ELF case, the + dynamic linker which is stored in the .interp section of the program + is executed) or directly by running: + + /lib/ld-uClibc.so.* [OPTIONS] [PROGRAM [ARGUMENTS]] + + Stand-alone execution is a prerequisite for adding prelink + capabilities to uClibc dynamic linker, as well useful for testing an + updated version of the dynamic linker without breaking the system. + +config LDSO_PRELINK_SUPPORT + bool "Dynamic linker prelink support" + depends on HAVE_SHARED + default n + select LDSO_STANDALONE_SUPPORT + help + The dynamic linker can be used in stand-alone mode by the prelink tool + for prelinking ELF shared libraries and binaries to speed up startup + time. It also is able to load and handle prelinked libraries and + binaries at runtime. + config UCLIBC_STATIC_LDCONFIG bool "Link ldconfig statically" depends on HAVE_SHARED 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 34bed1b4b..b1927e49a 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, tpntp) _dl_lookup_hash(n, r, m, c) -# define _dl_find_hash(n, r, m, t, tpntp) _dl_find_hash(n, r, m, t) +# define _dl_lookup_hash(n, r, m, s, c, tpnt) _dl_lookup_hash(n, r, m, s, c) +# define _dl_find_hash(n, r, m, s, t, tpntp) _dl_find_hash(n, r, m, s, t) #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); diff --git a/ldso/ldso/Makefile.in b/ldso/ldso/Makefile.in index e71ae1563..c9dcebd60 100644 --- a/ldso/ldso/Makefile.in +++ b/ldso/ldso/Makefile.in @@ -62,8 +62,16 @@ ldso-y := $($(UCLIBC_LDSO_NAME)_OBJS:.o=.oS) lib-so-y += $(ldso) objclean-y += CLEAN_ldso/ldso +ifeq ($(LDSO_PRELINK_SUPPORT),y) +# Use a specific linker script for ld.so +LDFLAGS-$(UCLIBC_LDSO_NAME).so += -T $(ldso:.$(ABI_VERSION)=).lds +endif + $(ldso): $(ldso:.$(ABI_VERSION)=) $(ldso:.$(ABI_VERSION)=): $($(UCLIBC_LDSO_NAME)_OUT)/$(UCLIBC_LDSO_NAME)_so.a +ifeq ($(LDSO_PRELINK_SUPPORT),y) + $(call create-lds) +endif $(call link.so,$(ldso_FULL_NAME),$(ABI_VERSION)) $($(UCLIBC_LDSO_NAME)_OUT)/$(UCLIBC_LDSO_NAME)_so.a: $(ldso-y) diff --git a/ldso/ldso/arm/elfinterp.c b/ldso/ldso/arm/elfinterp.c index adc282a57..ee2d1e559 100644 --- a/ldso/ldso/arm/elfinterp.c +++ b/ldso/ldso/arm/elfinterp.c @@ -69,8 +69,8 @@ unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry) got_addr = (char **) instr_addr; /* Get the address of the GOT entry */ - new_addr = _dl_find_hash(symname, tpnt->symbol_scope, - tpnt, ELF_RTYPE_CLASS_PLT, NULL); + new_addr = _dl_find_hash(symname, &_dl_loaded_modules->symbol_scope, + tpnt, NULL, ELF_RTYPE_CLASS_PLT, NULL); if (unlikely(!new_addr)) { _dl_dprintf(2, "%s: can't resolve symbol '%s'\n", _dl_progname, symname); @@ -99,9 +99,9 @@ unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry) } static int -_dl_parse(struct elf_resolve *tpnt, struct dyn_elf *scope, +_dl_parse(struct elf_resolve *tpnt, struct r_scope_elem *scope, unsigned long rel_addr, unsigned long rel_size, - int (*reloc_fnc) (struct elf_resolve *tpnt, struct dyn_elf *scope, + int (*reloc_fnc) (struct elf_resolve *tpnt, struct r_scope_elem *scope, ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)) { int i; @@ -181,7 +181,7 @@ fix_bad_pc24 (unsigned long *const reloc_addr, unsigned long value) #endif static int -_dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, +_dl_do_reloc (struct elf_resolve *tpnt,struct r_scope_elem *scope, ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab) { int reloc_type; @@ -192,6 +192,8 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, struct elf_resolve *def_mod = 0; int goof = 0; + struct sym_val current_value = { NULL, NULL }; + reloc_addr = (unsigned long *) (tpnt->loadaddr + (unsigned long) rpnt->r_offset); reloc_type = ELF32_R_TYPE(rpnt->r_info); @@ -202,7 +204,7 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, (ELF32_ST_VISIBILITY(symtab[symtab_index].st_other) != STV_PROTECTED)) { symbol_addr = _dl_find_hash(strtab + symtab[symtab_index].st_name, - scope, tpnt, elf_machine_type_class(reloc_type), &def_mod); + scope, tpnt, ¤t_value, elf_machine_type_class(reloc_type), &def_mod); /* * We want to allow undefined references to weak symbols - this might @@ -215,6 +217,9 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, return 1; } + if (_dl_trace_prelink) + _dl_debug_lookup (symname, tpnt, &symtab[symtab_index], + ¤t_value, elf_machine_type_class(reloc_type)); } else { /* * Relocs against STN_UNDEF are usually treated as using a @@ -311,7 +316,7 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, } static int -_dl_do_lazy_reloc (struct elf_resolve *tpnt, struct dyn_elf *scope, +_dl_do_lazy_reloc (struct elf_resolve *tpnt, struct r_scope_elem *scope, ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab) { int reloc_type; @@ -350,8 +355,8 @@ void _dl_parse_lazy_relocation_information(struct dyn_elf *rpnt, } 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) { - return _dl_parse(rpnt->dyn, rpnt->dyn->symbol_scope, rel_addr, rel_size, _dl_do_reloc); + return _dl_parse(rpnt->dyn, scope, rel_addr, rel_size, _dl_do_reloc); } diff --git a/ldso/ldso/avr32/elfinterp.c b/ldso/ldso/avr32/elfinterp.c index 797f8513e..e741fd60e 100644 --- a/ldso/ldso/avr32/elfinterp.c +++ b/ldso/ldso/avr32/elfinterp.c @@ -51,8 +51,8 @@ unsigned long _dl_linux_resolver(unsigned long got_offset, unsigned long *got) symname = strtab + sym->st_name; new_addr = (unsigned long) _dl_find_hash(strtab + sym->st_name, - tpnt->symbol_scope, tpnt, - resolver); + &_dl_loaded_modules->symbol_scope, tpnt, + NULL, 0, resolver); entry = (unsigned long *)(got + local_gotno + sym_index - gotsym); *entry = new_addr; @@ -63,9 +63,9 @@ unsigned long _dl_linux_resolver(unsigned long got_offset, unsigned long *got) } static int -_dl_parse(struct elf_resolve *tpnt, struct dyn_elf *scope, +_dl_parse(struct elf_resolve *tpnt, struct r_scope_elem *scope, unsigned long rel_addr, unsigned long rel_size, - int (*reloc_func)(struct elf_resolve *tpnt, struct dyn_elf *scope, + int (*reloc_func)(struct elf_resolve *tpnt, struct r_scope_elem *scope, Elf32_Rela *rpnt, Elf32_Sym *symtab, char *strtab)) { Elf32_Sym *symtab; @@ -116,7 +116,7 @@ _dl_parse(struct elf_resolve *tpnt, struct dyn_elf *scope, return 0; } -static int _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, +static int _dl_do_reloc(struct elf_resolve *tpnt, struct r_scope_elem *scope, Elf32_Rela *rpnt, Elf32_Sym *symtab, char *strtab) { int reloc_type; @@ -128,6 +128,8 @@ static int _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, unsigned long old_val; #endif + struct sym_val current_value = { NULL, NULL }; + reloc_addr = (unsigned long *)(tpnt->loadaddr + rpnt->r_offset); reloc_type = ELF32_R_TYPE(rpnt->r_info); symtab_index = ELF32_R_SYM(rpnt->r_info); @@ -137,7 +139,7 @@ static int _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, if (symtab_index) { symbol_addr = (unsigned long) _dl_find_hash(strtab + symtab[symtab_index].st_name, - tpnt->symbol_scope, tpnt, + scope, tpnt, ¤t_value, elf_machine_type_class(reloc_type), NULL); /* Allow undefined references to weak symbols */ @@ -147,6 +149,9 @@ static int _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, _dl_progname, symname); return 0; } + if (_dl_trace_prelink) + _dl_debug_lookup (symname, tpnt, &symtab[symtab_index], + ¤t_value, elf_machine_type_class(reloc_type)); } #if defined(__SUPPORT_LD_DEBUG__) @@ -185,9 +190,10 @@ void _dl_parse_lazy_relocation_information(struct dyn_elf *rpnt, } int _dl_parse_relocation_information(struct dyn_elf *rpnt, + struct r_scope_elem *scope, unsigned long rel_addr, unsigned long rel_size) { - return _dl_parse(rpnt->dyn, rpnt->dyn->symbol_scope, rel_addr, rel_size, + return _dl_parse(rpnt->dyn, scope, rel_addr, rel_size, _dl_do_reloc); } diff --git a/ldso/ldso/bfin/elfinterp.c b/ldso/ldso/bfin/elfinterp.c index e8d88bd5a..466a3b4c1 100644 --- a/ldso/ldso/bfin/elfinterp.c +++ b/ldso/ldso/bfin/elfinterp.c @@ -65,9 +65,9 @@ _dl_linux_resolver (struct elf_resolve *tpnt, int reloc_entry) got_entry = (struct funcdesc_value *) DL_RELOC_ADDR(tpnt->loadaddr, this_reloc->r_offset); /* Get the address to be used to fill in the GOT entry. */ - new_addr = _dl_lookup_hash(symname, tpnt->symbol_scope, NULL, 0, &new_tpnt); + new_addr = _dl_lookup_hash(symname, &_dl_loaded_modules->symbol_scope, NULL, NULL, 0, &new_tpnt); if (!new_addr) { - new_addr = _dl_lookup_hash(symname, NULL, NULL, 0, &new_tpnt); + new_addr = _dl_lookup_hash(symname, NULL, NULL, NULL, 0, &new_tpnt); if (!new_addr) { _dl_dprintf(2, "%s: can't resolve symbol '%s'\n", _dl_progname, symname); @@ -99,9 +99,9 @@ _dl_linux_resolver (struct elf_resolve *tpnt, int reloc_entry) } static int -_dl_parse(struct elf_resolve *tpnt, struct dyn_elf *scope, +_dl_parse(struct elf_resolve *tpnt, struct r_scope_elem *scope, unsigned long rel_addr, unsigned long rel_size, - int (*reloc_fnc) (struct elf_resolve *tpnt, struct dyn_elf *scope, + int (*reloc_fnc) (struct elf_resolve *tpnt, struct r_scope_elem *scope, ELF_RELOC *rpnt, ElfW(Sym) *symtab, char *strtab)) { unsigned int i; @@ -150,7 +150,7 @@ _dl_parse(struct elf_resolve *tpnt, struct dyn_elf *scope, } static int -_dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, +_dl_do_reloc (struct elf_resolve *tpnt,struct r_scope_elem *scope, ELF_RELOC *rpnt, ElfW(Sym) *symtab, char *strtab) { int reloc_type; @@ -166,6 +166,8 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, unsigned long old_val; #endif + struct sym_val current_value = { NULL, NULL }; + reloc_addr = (unsigned long *) DL_RELOC_ADDR(tpnt->loadaddr, rpnt->r_offset); __asm__ ("" : "=r" (reloc_addr_packed) : "0" (reloc_addr)); reloc_type = ELF_R_TYPE(rpnt->r_info); @@ -179,7 +181,7 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, } else { symbol_addr = (unsigned long) - _dl_lookup_hash(symname, scope, NULL, 0, &symbol_tpnt); + _dl_lookup_hash(symname, scope, NULL, ¤t_value, 0, &symbol_tpnt); /* * We want to allow undefined references to weak symbols - this might @@ -192,6 +194,9 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, _dl_progname, strtab + symtab[symtab_index].st_name); _dl_exit (1); } + if (_dl_trace_prelink) + _dl_debug_lookup (symname, tpnt, &symtab[symtab_index], + ¤t_value, elf_machine_type_class(reloc_type)); } #if defined (__SUPPORT_LD_DEBUG__) @@ -275,7 +280,7 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope, static int _dl_do_lazy_reloc (struct elf_resolve *tpnt, - struct dyn_elf *scope __attribute__((unused)), + struct r_scope_elem *scope __attribute__((unused)), ELF_RELOC *rpnt, ElfW(Sym) *symtab __attribute__((unused)), char *strtab __attribute__((unused))) { @@ -321,9 +326,9 @@ _dl_parse_lazy_relocation_information int _dl_parse_relocation_information -(struct dyn_elf *rpnt, unsigned long rel_addr, unsigned long rel_size) +(struct dyn_elf *rpnt, struct r_scope_elem *scope, unsigned long rel_addr, unsigned long rel_size) { - return _dl_parse(rpnt->dyn, rpnt->dyn->symbol_scope, rel_addr, rel_size, _dl_do_reloc); + return _dl_parse(rpnt->dyn, scope, rel_addr, rel_size, _dl_do_reloc); } /* We don't have copy relocs. */ diff --git a/ldso/ldso/cris/elfinterp.c b/ldso/ldso/cris/elfinterp.c index 32ea2da9e..48802aa7c 100644 --- a/ldso/ldso/cris/elfinterp.c +++ b/ldso/ldso/cris/elfinterp.c @@ -66,7 +66,7 @@ _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry) got_addr = (char **)instr_addr; /* Get the address of the GOT entry. */ - new_addr = _dl_find_hash(symname, tpnt->symbol_scope, tpnt, ELF_RTYPE_CLASS_PLT, NULL); + new_addr = _dl_find_hash(symname, &_dl_loaded_modules->symbol_scope, tpnt, NULL, ELF_RTYPE_CLASS_PLT, NULL); if (unlikely(!new_addr)) { _dl_dprintf(2, "%s: Can't resolve symbol '%s'\n", _dl_progname, symname); _dl_exit(1); @@ -91,9 +91,9 @@ _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry) } static int -_dl_parse(struct elf_resolve *tpnt, struct dyn_elf *scope, +_dl_parse(struct elf_resolve *tpnt, struct r_scope_elem *scope, unsigned long rel_addr, unsigned long rel_size, - int (*reloc_fnc)(struct elf_resolve *tpnt, struct dyn_elf *scope, + int (*reloc_fnc)(struct elf_resolve *tpnt, struct r_scope_elem *scope, ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)) { int symtab_index; @@ -150,7 +150,7 @@ _dl_parse(struct elf_resolve *tpnt, struct dyn_elf *scope, } static int -_dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, +_dl_do_reloc(struct elf_resolve *tpnt, struct r_scope_elem *scope, ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab) { int reloc_type; @@ -162,6 +162,8 @@ _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, unsigned long old_val; #endif + struct sym_val current_value = { NULL, NULL }; + reloc_addr = (unsigned long *)(intptr_t)(tpnt->loadaddr + (unsigned long)rpnt->r_offset); reloc_type = ELF32_R_TYPE(rpnt->r_info); symtab_index = ELF32_R_SYM(rpnt->r_info); @@ -174,15 +176,17 @@ _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, symbol_addr = (unsigned long)tpnt->loadaddr; } else { symbol_addr = (unsigned long)_dl_find_hash(symname, scope, tpnt, - elf_machine_type_class(reloc_type), NULL); + ¤t_value, elf_machine_type_class(reloc_type), NULL); } if (unlikely(!symbol_addr && ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK)) { _dl_dprintf(2, "%s: can't resolve symbol '%s'\n", _dl_progname, symname); _dl_exit(1); } - symbol_addr += rpnt->r_addend; + if (_dl_trace_prelink) + _dl_debug_lookup (symname, tpnt, &symtab[symtab_index], + ¤t_value, elf_machine_type_class(reloc_type)); } #if defined (__SUPPORT_LD_DEBUG__) @@ -227,7 +231,7 @@ _dl_do_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, } static int -_dl_do_lazy_reloc(struct elf_resolve *tpnt, struct dyn_elf *scope, +_dl_do_lazy_reloc(struct elf_resolve *tpnt, struct r_scope_elem *scope, ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab) { int reloc_type; @@ -279,8 +283,9 @@ _dl_parse_lazy_relocation_information(struct dyn_elf *rpnt, int _dl_parse_relocation_information(struct dyn_elf *rpnt, + struct r_scope_elem *scope, unsigned long rel_addr, unsigned long rel_size) { - return _dl_parse(rpnt->dyn, rpnt->dyn->symbol_scope, rel_addr, rel_size, _dl_do_reloc); + return _dl_parse(rpnt->dyn, scope, rel_addr, rel_size, _dl_do_reloc); } diff --git a/ldso/ldso/dl-debug.c b/ldso/ldso/dl-debug.c index 7ce8bfbce..47b32316e 100644 --- a/ldso/ldso/dl-debug.c +++ b/ldso/ldso/dl-debug.c @@ -104,3 +104,60 @@ static void debug_reloc(ElfW(Sym) *symtab, char *strtab, ELF_RELOC *rpnt) #define debug_reloc(symtab, strtab, rpnt) #endif /* __SUPPORT_LD_DEBUG__ */ + +#ifdef __LDSO_PRELINK_SUPPORT__ +static void +internal_function +_dl_debug_lookup (const char *undef_name, struct elf_resolve *undef_map, + const ElfW(Sym) *ref, struct sym_val *value, int type_class) +{ +#ifdef SHARED + unsigned long symbol_addr; + + if (_dl_trace_prelink) + { + int conflict = 0; + struct elf_resolve *tls_tpnt = NULL; + struct sym_val val = { NULL, NULL }; + + if ((_dl_trace_prelink_map == NULL + || _dl_trace_prelink_map == _dl_loaded_modules) + && undef_map != _dl_loaded_modules) + { + symbol_addr = (unsigned long) + _dl_find_hash(undef_name, &undef_map->symbol_scope, + undef_map, &val, type_class, &tls_tpnt); + + if (val.s != value->s || val.m != value->m) + conflict = 1; + } + + if (value->s + && (__builtin_expect (ELF_ST_TYPE(value->s->st_info) + == STT_TLS, 0))) + type_class = 4; + + if (conflict + || _dl_trace_prelink_map == undef_map + || _dl_trace_prelink_map == NULL + || type_class == 4) + { + _dl_dprintf (1, "%s %x %x -> %x %x ", + conflict ? "conflict" : "lookup", + (size_t) undef_map->mapaddr, + (size_t) (((ElfW(Addr)) ref) - undef_map->mapaddr), + (size_t) (value->m ? value->m->mapaddr : 0), + (size_t) (value->s ? value->s->st_value : 0)); + if (conflict) + _dl_dprintf (1, "x %x %x ", + (size_t) (val.m ? val.m->mapaddr : 0), + (size_t) (val.s ? val.s->st_value : 0)); + _dl_dprintf (1, "/%x %s\n", type_class, undef_name); + } +} +#endif +} + +#else +#define _dl_debug_lookup(undef_name, undef_map, ref, value, type_class) +#endif diff --git a/ldso/ldso/dl-elf.c b/ldso/ldso/dl-elf.c index 5562e0784..d72dd5ae2 100644 --- a/ldso/ldso/dl-elf.c +++ b/ldso/ldso/dl-elf.c @@ -322,7 +322,7 @@ goof: */ struct elf_resolve *_dl_load_elf_shared_library(int secure, - struct dyn_elf **rpnt, char *libname) + struct dyn_elf **rpnt, const char *libname) { ElfW(Ehdr) *epnt; unsigned long dynamic_addr = 0; @@ -343,7 +343,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, size_t relro_size = 0; struct stat st; uint32_t *p32; - DL_LOADADDR_TYPE lib_loadaddr; + DL_LOADADDR_TYPE lib_loadaddr = 0; DL_INIT_LOADADDR_EXTRA_DECLS libaddr = 0; @@ -397,11 +397,15 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, return NULL; } - if ((epnt->e_type != ET_DYN) || (epnt->e_machine != MAGIC1 + if ((epnt->e_type != ET_DYN +#ifdef __LDSO_STANDALONE_SUPPORT__ + && epnt->e_type != ET_EXEC +#endif + ) || (epnt->e_machine != MAGIC1 #ifdef MAGIC2 && epnt->e_machine != MAGIC2 #endif - )) + )) { _dl_internal_error_number = (epnt->e_type != ET_DYN ? LD_ERROR_NOTDYN : LD_ERROR_NOTMAGIC); @@ -426,7 +430,7 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, if (ppnt->p_type == PT_LOAD) { /* See if this is a PIC library. */ - if (i == 0 && ppnt->p_vaddr > 0x1000000) { + if (minvma == 0xffffffff && ppnt->p_vaddr > 0x1000000) { piclib = 0; minvma = ppnt->p_vaddr; } @@ -462,14 +466,17 @@ struct elf_resolve *_dl_load_elf_shared_library(int secure, ppnt++; } +#ifdef __LDSO_STANDALONE_SUPPORT__ |