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Diffstat (limited to 'ldso/ldso/ldso.c')
-rw-r--r--ldso/ldso/ldso.c98
1 files changed, 50 insertions, 48 deletions
diff --git a/ldso/ldso/ldso.c b/ldso/ldso/ldso.c
index 2c1d3e33c..7bfe24947 100644
--- a/ldso/ldso/ldso.c
+++ b/ldso/ldso/ldso.c
@@ -105,12 +105,8 @@
* application.
*/
-#include "ld_syscall.h"
-#include "linuxelf.h"
-#include "ld_hash.h"
-#include "ld_string.h"
-#include "dlfcn.h"
-#include "../config.h"
+#include "ldso.h"
+
#define ALLOW_ZERO_PLTGOT
@@ -129,7 +125,7 @@
char *_dl_library_path = 0; /* Where we look for libraries */
char *_dl_preload = 0; /* Things to be loaded before the libs. */
char *_dl_ldsopath = 0;
-static char *_dl_not_lazy = 0;
+static int _dl_be_lazy = 1;
#ifdef __SUPPORT_LD_DEBUG__
static char *_dl_debug = 0;
static char *_dl_debug_symbols = 0;
@@ -150,15 +146,15 @@ static int (*_dl_elf_init) (void);
struct r_debug *_dl_debug_addr = NULL;
unsigned long *_dl_brkp;
unsigned long *_dl_envp;
-int _dl_fixup(struct elf_resolve *tpnt);
+int _dl_fixup(struct elf_resolve *tpnt, int lazy);
void _dl_debug_state(void);
char *_dl_get_last_path_component(char *path);
static void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *app_tpnt,
unsigned long load_addr, unsigned long *hash_addr, Elf32_auxv_t auxvt[AT_EGID + 1],
char **envp, struct r_debug *debug_addr);
-#include "boot1_arch.h"
-#include "ldso.h" /* Pull in the name of ld.so */
+#include "boot1_arch.h"
+#include "_dl_progname.h" /* Pull in the value of _dl_progname */
/* When we enter this piece of code, the program stack looks like this:
argc argument counter (integer)
@@ -202,7 +198,7 @@ LD_BOOT(unsigned long args)
unsigned long *got;
unsigned long *aux_dat;
int goof = 0;
- elfhdr *header;
+ ElfW(Ehdr) *header;
struct elf_resolve *tpnt;
struct elf_resolve *app_tpnt;
Elf32_auxv_t auxvt[AT_EGID + 1];
@@ -253,7 +249,7 @@ LD_BOOT(unsigned long args)
/* locate the ELF header. We need this done as soon as possible
* (esp since SEND_STDERR() needs this on some platforms... */
load_addr = auxvt[AT_BASE].a_un.a_val;
- header = (elfhdr *) auxvt[AT_BASE].a_un.a_ptr;
+ header = (ElfW(Ehdr) *) auxvt[AT_BASE].a_un.a_ptr;
/* Check the ELF header to make sure everything looks ok. */
if (!header || header->e_ident[EI_CLASS] != ELFCLASS32 ||
@@ -406,10 +402,10 @@ LD_BOOT(unsigned long args)
}
{
- elf_phdr *ppnt;
+ ElfW(Phdr) *ppnt;
int i;
- ppnt = (elf_phdr *) auxvt[AT_PHDR].a_un.a_ptr;
+ ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_ptr;
for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++)
if (ppnt->p_type == PT_DYNAMIC) {
dpnt = (Elf32_Dyn *) ppnt->p_vaddr;
@@ -467,7 +463,7 @@ LD_BOOT(unsigned long args)
protection back again once we are done */
{
- elf_phdr *ppnt;
+ ElfW(Phdr) *ppnt;
int i;
#ifdef __SUPPORT_LD_DEBUG_EARLY__
@@ -476,8 +472,8 @@ LD_BOOT(unsigned long args)
/* First cover the shared library/dynamic linker. */
if (tpnt->dynamic_info[DT_TEXTREL]) {
- header = (elfhdr *) auxvt[AT_BASE].a_un.a_ptr;
- ppnt = (elf_phdr *) ((int)auxvt[AT_BASE].a_un.a_ptr +
+ header = (ElfW(Ehdr) *) auxvt[AT_BASE].a_un.a_ptr;
+ ppnt = (ElfW(Phdr) *) ((int)auxvt[AT_BASE].a_un.a_ptr +
header->e_phoff);
for (i = 0; i < header->e_phnum; i++, ppnt++) {
if (ppnt->p_type == PT_LOAD && !(ppnt->p_flags & PF_W)) {
@@ -493,7 +489,7 @@ LD_BOOT(unsigned long args)
#endif
/* Now cover the application program. */
if (app_tpnt->dynamic_info[DT_TEXTREL]) {
- ppnt = (elf_phdr *) auxvt[AT_PHDR].a_un.a_ptr;
+ ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_ptr;
for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++) {
if (ppnt->p_type == PT_LOAD && !(ppnt->p_flags & PF_W))
_dl_mprotect((void *) (ppnt->p_vaddr & PAGE_ALIGN),
@@ -647,7 +643,7 @@ static void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *a
unsigned long load_addr, unsigned long *hash_addr, Elf32_auxv_t auxvt[AT_EGID + 1],
char **envp, struct r_debug *debug_addr)
{
- elf_phdr *ppnt;
+ ElfW(Phdr) *ppnt;
char *lpntstr;
int i, _dl_secure, goof = 0;
struct dyn_elf *rpnt;
@@ -685,13 +681,13 @@ static void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *a
and load them properly. */
{
- elfhdr *epnt;
- elf_phdr *myppnt;
+ ElfW(Ehdr) *epnt;
+ ElfW(Phdr) *myppnt;
int j;
- epnt = (elfhdr *) auxvt[AT_BASE].a_un.a_ptr;
+ epnt = (ElfW(Ehdr) *) auxvt[AT_BASE].a_un.a_ptr;
tpnt->n_phent = epnt->e_phnum;
- tpnt->ppnt = myppnt = (elf_phdr *) (load_addr + epnt->e_phoff);
+ tpnt->ppnt = myppnt = (ElfW(Phdr) *) (load_addr + epnt->e_phoff);
for (j = 0; j < epnt->e_phnum; j++, myppnt++) {
if (myppnt->p_type == PT_DYNAMIC) {
tpnt->dynamic_addr = myppnt->p_vaddr + load_addr;
@@ -720,7 +716,7 @@ static void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *a
and figure out which libraries are supposed to be called. Until
we have this list, we will not be completely ready for dynamic linking */
- ppnt = (elf_phdr *) auxvt[AT_PHDR].a_un.a_ptr;
+ ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_ptr;
for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++) {
if (ppnt->p_type == PT_LOAD) {
if (ppnt->p_vaddr + ppnt->p_memsz > brk_addr)
@@ -751,7 +747,7 @@ static void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *a
app_tpnt->dynamic_info, ppnt->p_vaddr, ppnt->p_filesz);
#endif
_dl_loaded_modules->libtype = elf_executable;
- _dl_loaded_modules->ppnt = (elf_phdr *) auxvt[AT_PHDR].a_un.a_ptr;
+ _dl_loaded_modules->ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_ptr;
_dl_loaded_modules->n_phent = auxvt[AT_PHNUM].a_un.a_val;
_dl_symbol_tables = rpnt = (struct dyn_elf *) _dl_malloc(sizeof(struct dyn_elf));
_dl_memset(rpnt, 0, sizeof(struct dyn_elf));
@@ -805,7 +801,8 @@ static void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *a
/* Now we need to figure out what kind of options are selected.
Note that for SUID programs we ignore the settings in LD_LIBRARY_PATH */
{
- _dl_not_lazy = _dl_getenv("LD_BIND_NOW", envp);
+ if (_dl_getenv("LD_BIND_NOW", envp))
+ _dl_be_lazy = 0;
if ((auxvt[AT_UID].a_un.a_val == -1 && _dl_suid_ok()) ||
(auxvt[AT_UID].a_un.a_val != -1 &&
@@ -905,9 +902,7 @@ static void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *a
libraries that should be loaded, and insert them on the list in the
correct order. */
-#ifdef USE_CACHE
_dl_map_cache();
-#endif
if (_dl_preload)
@@ -1124,9 +1119,7 @@ static void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *a
}
-#ifdef USE_CACHE
_dl_unmap_cache();
-#endif
/*
* If the program interpreter is not in the module chain, add it. This will
@@ -1187,7 +1180,7 @@ static void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *a
* Now we go through and look for REL and RELA records that indicate fixups
* to the GOT tables. We need to do this in reverse order so that COPY
* directives work correctly */
- goof = _dl_loaded_modules ? _dl_fixup(_dl_loaded_modules) : 0;
+ goof = _dl_loaded_modules ? _dl_fixup(_dl_loaded_modules, _dl_be_lazy) : 0;
/* Some flavors of SVr4 do not generate the R_*_COPY directive,
@@ -1222,7 +1215,7 @@ static void _dl_get_ready_to_run(struct elf_resolve *tpnt, struct elf_resolve *a
#ifndef FORCE_SHAREABLE_TEXT_SEGMENTS
{
unsigned int j;
- elf_phdr *myppnt;
+ ElfW(Phdr) *myppnt;
/* We had to set the protections of all pages to R/W for dynamic linking.
Set text pages back to R/O */
@@ -1306,52 +1299,61 @@ void _dl_debug_state(void)
{
}
-int _dl_fixup(struct elf_resolve *tpnt)
+int _dl_fixup(struct elf_resolve *tpnt, int flag)
{
int goof = 0;
if (tpnt->next)
- goof += _dl_fixup(tpnt->next);
+ goof += _dl_fixup(tpnt->next, flag);
#if defined (__SUPPORT_LD_DEBUG__)
if(_dl_debug) _dl_dprintf(_dl_debug_file,"\nrelocation processing: %s", tpnt->libname);
#endif
if (tpnt->dynamic_info[DT_REL]) {
#ifdef ELF_USES_RELOCA
- _dl_dprintf(2, "%s: can't handle REL relocation records\n",
- _dl_progname);
- _dl_exit(17);
+#if defined (__SUPPORT_LD_DEBUG__)
+ if(_dl_debug) _dl_dprintf(2, "%s: can't handle REL relocation records\n", _dl_progname);
+#endif
+ goof++;
+ return goof;
#else
if (tpnt->init_flag & RELOCS_DONE)
return goof;
tpnt->init_flag |= RELOCS_DONE;
- goof += _dl_parse_relocation_information(tpnt, tpnt->dynamic_info[DT_REL],
+ goof += _dl_parse_relocation_information(tpnt,
+ tpnt->dynamic_info[DT_REL],
tpnt->dynamic_info[DT_RELSZ], 0);
#endif
}
if (tpnt->dynamic_info[DT_RELA]) {
-#ifdef ELF_USES_RELOCA
+#ifndef ELF_USES_RELOCA
+#if defined (__SUPPORT_LD_DEBUG__)
+ if(_dl_debug) _dl_dprintf(2, "%s: can't handle RELA relocation records\n", _dl_progname);
+#endif
+ goof++;
+ return goof;
+#else
if (tpnt->init_flag & RELOCS_DONE)
return goof;
tpnt->init_flag |= RELOCS_DONE;
- goof += _dl_parse_relocation_information(tpnt, tpnt->dynamic_info[DT_RELA],
+ goof += _dl_parse_relocation_information(tpnt,
+ tpnt->dynamic_info[DT_RELA],
tpnt->dynamic_info[DT_RELASZ], 0);
-#else
- _dl_dprintf(2, "%s: can't handle RELA relocation records\n",
- _dl_progname);
- _dl_exit(18);
#endif
}
if (tpnt->dynamic_info[DT_JMPREL]) {
if (tpnt->init_flag & JMP_RELOCS_DONE)
return goof;
tpnt->init_flag |= JMP_RELOCS_DONE;
- if (!_dl_not_lazy || *_dl_not_lazy == 0)
- _dl_parse_lazy_relocation_information(tpnt, tpnt->dynamic_info[DT_JMPREL],
+ if (flag & RTLD_LAZY) {
+ _dl_parse_lazy_relocation_information(tpnt,
+ tpnt->dynamic_info[DT_JMPREL],
tpnt->dynamic_info [DT_PLTRELSZ], 0);
- else
- goof += _dl_parse_relocation_information(tpnt, tpnt->dynamic_info[DT_JMPREL],
+ } else {
+ goof += _dl_parse_relocation_information(tpnt,
+ tpnt->dynamic_info[DT_JMPREL],
tpnt->dynamic_info[DT_PLTRELSZ], 0);
+ }
}
#if defined (__SUPPORT_LD_DEBUG__)
if(_dl_debug) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-25 05:49:57 +0000