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-rw-r--r--include/sys/auxv.h30
-rwxr-xr-x[-rw-r--r--]ldso/include/ldso.h8
-rw-r--r--ldso/ldso/dl-startup.c32
-rwxr-xr-x[-rw-r--r--]ldso/ldso/ldso.c47
-rw-r--r--libc/misc/Makefile.in2
-rw-r--r--libc/misc/auxvt/Makefile.in23
-rwxr-xr-xlibc/misc/auxvt/getauxval.c40
7 files changed, 146 insertions, 36 deletions
diff --git a/include/sys/auxv.h b/include/sys/auxv.h
new file mode 100644
index 000000000..71860b794
--- /dev/null
+++ b/include/sys/auxv.h
@@ -0,0 +1,30 @@
+/* Copyright (C) 2022 uClibc-ng
+ This file is part of the uClibc-ng Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_AUXV_H
+#define _SYS_AUXV_H 1
+
+__BEGIN_DECLS
+
+/* Return the value associated with an Elf*_auxv_t type from the auxv list
+ passed to the program on startup. If TYPE was not present in the auxv
+ list, returns zero and sets errno to ENOENT. */
+extern unsigned long int getauxval (unsigned long int __type) __THROW;
+
+__END_DECLS
+
+#endif /* sys/auxv.h */
diff --git a/ldso/include/ldso.h b/ldso/include/ldso.h
index f19957d1d..c035b3b52 100644..100755
--- a/ldso/include/ldso.h
+++ b/ldso/include/ldso.h
@@ -148,6 +148,7 @@ extern int _dl_debug_file;
#define NULL ((void *) 0)
#endif
+
extern void *_dl_malloc(size_t size);
extern void *_dl_calloc(size_t __nmemb, size_t __size);
extern void *_dl_realloc(void *__ptr, size_t __size);
@@ -176,7 +177,7 @@ extern void _dl_dprintf(int, const char *, ...);
#endif
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
+ char **envp, char **argv
DL_GET_READY_TO_RUN_EXTRA_PARMS);
#ifdef HAVE_DL_INLINES_H
@@ -185,6 +186,11 @@ extern void *_dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE loa
#else /* __ARCH_HAS_NO_SHARED__ */
#include <dl-defs.h>
+#include <dl-elf.h>
+
#endif
+#define AUX_MAX_AT_ID 40
+extern ElfW(auxv_t) _dl_auxvt[AUX_MAX_AT_ID];
+
#endif /* _LDSO_H */
diff --git a/ldso/ldso/dl-startup.c b/ldso/ldso/dl-startup.c
index a1b3d49fd..e36d688b4 100644
--- a/ldso/ldso/dl-startup.c
+++ b/ldso/ldso/dl-startup.c
@@ -98,6 +98,9 @@
extern ElfW(Addr) _begin[] attribute_hidden;
#endif
+
+ElfW(auxv_t) _dl_auxvt[AUX_MAX_AT_ID];
+
#ifdef LDSO_NEED_DPNT
ElfW(Dyn) *_dl_saved_dpnt = 0;
#endif
@@ -127,7 +130,7 @@ DL_START(unsigned long args)
ElfW(Ehdr) *header;
struct elf_resolve tpnt_tmp;
struct elf_resolve *tpnt = &tpnt_tmp;
- ElfW(auxv_t) auxvt[AT_EGID + 1];
+ ElfW(auxv_t) _dl_auxvt_tmp[AUX_MAX_AT_ID];
ElfW(Dyn) *dpnt;
uint32_t *p32;
@@ -158,7 +161,7 @@ DL_START(unsigned long args)
/* Place -1 here as a checkpoint. We later check if it was changed
* when we read in the auxvt */
- auxvt[AT_UID].a_type = -1;
+ _dl_auxvt_tmp[AT_UID].a_type = -1;
/* The junk on the stack immediately following the environment is
* the Auxiliary Vector Table. Read out the elements of the auxvt,
@@ -166,9 +169,11 @@ DL_START(unsigned long args)
while (*aux_dat) {
ElfW(auxv_t) *auxv_entry = (ElfW(auxv_t) *) aux_dat;
- if (auxv_entry->a_type <= AT_EGID) {
- _dl_memcpy(&(auxvt[auxv_entry->a_type]), auxv_entry, sizeof(ElfW(auxv_t)));
+ if (auxv_entry->a_type < AUX_MAX_AT_ID) {
+ _dl_memcpy(&(_dl_auxvt_tmp[auxv_entry->a_type]), auxv_entry, sizeof(ElfW(auxv_t)));
}
+
+
aux_dat += 2;
}
@@ -183,16 +188,16 @@ DL_START(unsigned long args)
* We use it if the kernel is not passing a valid address through the auxvt.
*/
- if (!auxvt[AT_BASE].a_un.a_val)
- auxvt[AT_BASE].a_un.a_val = (ElfW(Addr)) &_begin;
+ if (!_dl_auxvt_tmp[AT_BASE].a_un.a_val)
+ _dl_auxvt_tmp[AT_BASE].a_un.a_val = (ElfW(Addr)) &_begin;
/* Note: if the dynamic linker itself is prelinked, the load_addr is 0 */
DL_INIT_LOADADDR_BOOT(load_addr, elf_machine_load_address());
#else
- if (!auxvt[AT_BASE].a_un.a_val)
- auxvt[AT_BASE].a_un.a_val = elf_machine_load_address();
- DL_INIT_LOADADDR_BOOT(load_addr, auxvt[AT_BASE].a_un.a_val);
+ if (!_dl_auxvt_tmp[AT_BASE].a_un.a_val)
+ _dl_auxvt_tmp[AT_BASE].a_un.a_val = elf_machine_load_address();
+ DL_INIT_LOADADDR_BOOT(load_addr, _dl_auxvt_tmp[AT_BASE].a_un.a_val);
#endif
- header = (ElfW(Ehdr) *) auxvt[AT_BASE].a_un.a_val;
+ header = (ElfW(Ehdr) *) _dl_auxvt_tmp[AT_BASE].a_un.a_val;
/* Check the ELF header to make sure everything looks ok. */
if (!header || header->e_ident[EI_CLASS] != ELF_CLASS ||
@@ -353,8 +358,13 @@ DL_START(unsigned long args)
#endif
__rtld_stack_end = (void *)(argv - 1);
+ /*
+ * now the globals work. so copy the aux vector
+ */
+ _dl_memcpy( _dl_auxvt, _dl_auxvt_tmp, sizeof( ElfW(auxv_t) ) * AUX_MAX_AT_ID );
+
_dl_elf_main = (int (*)(int, char **, char **))
- _dl_get_ready_to_run(tpnt, load_addr, auxvt, envp, argv
+ _dl_get_ready_to_run(tpnt, load_addr, envp, argv
DL_GET_READY_TO_RUN_EXTRA_ARGS);
/* Transfer control to the application. */
diff --git a/ldso/ldso/ldso.c b/ldso/ldso/ldso.c
index b33547670..8e4914df5 100644..100755
--- a/ldso/ldso/ldso.c
+++ b/ldso/ldso/ldso.c
@@ -350,10 +350,9 @@ static void trace_objects(struct elf_resolve *tpnt, char *str_name)
static struct elf_resolve * add_ldso(struct elf_resolve *tpnt,
DL_LOADADDR_TYPE load_addr,
ElfW(Addr) ldso_mapaddr,
- ElfW(auxv_t) auxvt[AT_EGID + 1],
struct dyn_elf *rpnt)
{
- ElfW(Ehdr) *epnt = (ElfW(Ehdr) *) auxvt[AT_BASE].a_un.a_val;
+ ElfW(Ehdr) *epnt = (ElfW(Ehdr) *) _dl_auxvt[AT_BASE].a_un.a_val;
ElfW(Phdr) *myppnt = (ElfW(Phdr) *)
DL_RELOC_ADDR(DL_GET_RUN_ADDR(load_addr, ldso_mapaddr),
epnt->e_phoff);
@@ -422,7 +421,7 @@ static void _dl_setup_progname(const char *argv0)
}
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
+ char **envp, char **argv
DL_GET_READY_TO_RUN_EXTRA_PARMS)
{
ElfW(Addr) app_mapaddr = 0, ldso_mapaddr = 0;
@@ -461,7 +460,7 @@ void *_dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
_dl_memset(app_tpnt, 0, sizeof(*app_tpnt));
/* Store the page size for later use */
- _dl_pagesize = (auxvt[AT_PAGESZ].a_un.a_val) ? (size_t) auxvt[AT_PAGESZ].a_un.a_val : PAGE_SIZE;
+ _dl_pagesize = (_dl_auxvt[AT_PAGESZ].a_un.a_val) ? (size_t) _dl_auxvt[AT_PAGESZ].a_un.a_val : PAGE_SIZE;
/* Make it so _dl_malloc can use the page of memory we have already
* allocated. We shouldn't need to grab any more memory. This must
* be first since things like _dl_dprintf() use _dl_malloc()...
@@ -485,7 +484,7 @@ void *_dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
#endif
#ifndef __LDSO_STANDALONE_SUPPORT__
- if (_start == (void *) auxvt[AT_ENTRY].a_un.a_val) {
+ if (_start == (void *) _dl_auxvt[AT_ENTRY].a_un.a_val) {
_dl_dprintf(2, "Standalone execution is not enabled\n");
_dl_exit(1);
}
@@ -504,10 +503,10 @@ void *_dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
* Note that for SUID programs we ignore the settings in
* LD_LIBRARY_PATH.
*/
- if ((auxvt[AT_UID].a_un.a_val == (size_t)-1 && _dl_suid_ok()) ||
- (auxvt[AT_UID].a_un.a_val != (size_t)-1 &&
- auxvt[AT_UID].a_un.a_val == auxvt[AT_EUID].a_un.a_val &&
- auxvt[AT_GID].a_un.a_val == auxvt[AT_EGID].a_un.a_val)) {
+ if ((_dl_auxvt[AT_UID].a_un.a_val == (size_t)-1 && _dl_suid_ok()) ||
+ (_dl_auxvt[AT_UID].a_un.a_val != (size_t)-1 &&
+ _dl_auxvt[AT_UID].a_un.a_val == _dl_auxvt[AT_EUID].a_un.a_val &&
+ _dl_auxvt[AT_GID].a_un.a_val == _dl_auxvt[AT_EGID].a_un.a_val)) {
_dl_secure = 0;
#ifdef __LDSO_PRELOAD_ENV_SUPPORT__
_dl_preload = _dl_getenv("LD_PRELOAD", envp);
@@ -546,7 +545,7 @@ void *_dl_get_ready_to_run(struct elf_resolve *tpnt, DL_LOADADDR_TYPE load_addr,
#endif
#ifdef __LDSO_STANDALONE_SUPPORT__
- if (_start == (void *) auxvt[AT_ENTRY].a_un.a_val) {
+ if (_start == (void *) _dl_auxvt[AT_ENTRY].a_un.a_val) {
ElfW(Addr) *aux_dat = (ElfW(Addr) *) argv;
int argc = (int) aux_dat[-1];
@@ -643,11 +642,11 @@ of this helper program; chances are you did not intend to run this program.\n\
*/
{
unsigned int idx;
- ElfW(Phdr) *phdr = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
+ ElfW(Phdr) *phdr = (ElfW(Phdr) *) _dl_auxvt[AT_PHDR].a_un.a_val;
- for (idx = 0; idx < auxvt[AT_PHNUM].a_un.a_val; idx++, phdr++)
+ for (idx = 0; idx < _dl_auxvt[AT_PHNUM].a_un.a_val; idx++, phdr++)
if (phdr->p_type == PT_PHDR) {
- DL_INIT_LOADADDR_PROG(app_tpnt->loadaddr, auxvt[AT_PHDR].a_un.a_val - phdr->p_vaddr);
+ DL_INIT_LOADADDR_PROG(app_tpnt->loadaddr, _dl_auxvt[AT_PHDR].a_un.a_val - phdr->p_vaddr);
break;
}
@@ -662,8 +661,8 @@ of this helper program; chances are you did not intend to run this program.\n\
*/
debug_addr = _dl_zalloc(sizeof(struct r_debug));
- ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
- for (i = 0; i < auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++) {
+ ppnt = (ElfW(Phdr) *) _dl_auxvt[AT_PHDR].a_un.a_val;
+ for (i = 0; i < _dl_auxvt[AT_PHNUM].a_un.a_val; i++, ppnt++) {
if (ppnt->p_type == PT_GNU_RELRO) {
relro_addr = ppnt->p_vaddr;
relro_size = ppnt->p_memsz;
@@ -685,8 +684,8 @@ of this helper program; chances are you did not intend to run this program.\n\
int j;
ElfW(Phdr) *ppnt_outer = ppnt;
_dl_debug_early("calling mprotect on the application program\n");
- ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
- for (j = 0; j < auxvt[AT_PHNUM].a_un.a_val; j++, ppnt++) {
+ ppnt = (ElfW(Phdr) *) _dl_auxvt[AT_PHDR].a_un.a_val;
+ for (j = 0; j < _dl_auxvt[AT_PHNUM].a_un.a_val; j++, ppnt++) {
if (ppnt->p_type == PT_LOAD && !(ppnt->p_flags & PF_W))
_dl_mprotect((void *) (DL_RELOC_ADDR(app_tpnt->loadaddr, ppnt->p_vaddr) & PAGE_ALIGN),
(DL_RELOC_ADDR(app_tpnt->loadaddr, ppnt->p_vaddr) & ADDR_ALIGN) +
@@ -713,8 +712,8 @@ of this helper program; chances are you did not intend to run this program.\n\
(unsigned long) DL_RELOC_ADDR(app_tpnt->loadaddr, ppnt->p_vaddr),
ppnt->p_filesz);
_dl_loaded_modules->libtype = elf_executable;
- _dl_loaded_modules->ppnt = (ElfW(Phdr) *) auxvt[AT_PHDR].a_un.a_val;
- _dl_loaded_modules->n_phent = auxvt[AT_PHNUM].a_un.a_val;
+ _dl_loaded_modules->ppnt = (ElfW(Phdr) *) _dl_auxvt[AT_PHDR].a_un.a_val;
+ _dl_loaded_modules->n_phent = _dl_auxvt[AT_PHNUM].a_un.a_val;
_dl_symbol_tables = rpnt = _dl_zalloc(sizeof(struct dyn_elf));
rpnt->dyn = _dl_loaded_modules;
app_tpnt->mapaddr = app_mapaddr;
@@ -856,7 +855,7 @@ of this helper program; chances are you did not intend to run this program.\n\
}
#endif
- ldso_mapaddr = (ElfW(Addr)) auxvt[AT_BASE].a_un.a_val;
+ ldso_mapaddr = (ElfW(Addr)) _dl_auxvt[AT_BASE].a_un.a_val;
/*
* OK, fix one more thing - set up debug_addr so it will point
* to our chain. Later we may need to fill in more fields, but this
@@ -1046,7 +1045,7 @@ of this helper program; chances are you did not intend to run this program.\n\
if (!ldso_tpnt) {
/* Insert the ld.so only once */
ldso_tpnt = add_ldso(tpnt, load_addr,
- ldso_mapaddr, auxvt, rpnt);
+ ldso_mapaddr, rpnt);
} else {
ldso_tpnt->init_flag |= DL_OPENED2;
}
@@ -1148,7 +1147,7 @@ of this helper program; chances are you did not intend to run this program.\n\
* again once all libs are loaded.
*/
if (!ldso_tpnt) {
- tpnt = add_ldso(tpnt, load_addr, ldso_mapaddr, auxvt, rpnt);
+ tpnt = add_ldso(tpnt, load_addr, ldso_mapaddr, rpnt);
tpnt->usage_count++;
nscope_elem++;
} else
@@ -1450,11 +1449,11 @@ of this helper program; chances are you did not intend to run this program.\n\
_dl_debug_state();
#ifdef __LDSO_STANDALONE_SUPPORT__
- if (_start == (void *) auxvt[AT_ENTRY].a_un.a_val)
+ if (_start == (void *) _dl_auxvt[AT_ENTRY].a_un.a_val)
return (void *) app_tpnt->l_entry;
else
#endif
- return (void *) auxvt[AT_ENTRY].a_un.a_val;
+ return (void *) _dl_auxvt[AT_ENTRY].a_un.a_val;
}
#include "dl-hash.c"
diff --git a/libc/misc/Makefile.in b/libc/misc/Makefile.in
index 53bb6d6c8..caf7f1391 100644
--- a/libc/misc/Makefile.in
+++ b/libc/misc/Makefile.in
@@ -5,7 +5,9 @@
# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
#
+
include $(top_srcdir)libc/misc/assert/Makefile.in
+include $(top_srcdir)libc/misc/auxvt/Makefile.in
include $(top_srcdir)libc/misc/ctype/Makefile.in
include $(top_srcdir)libc/misc/dirent/Makefile.in
include $(top_srcdir)libc/misc/error/Makefile.in
diff --git a/libc/misc/auxvt/Makefile.in b/libc/misc/auxvt/Makefile.in
new file mode 100644
index 000000000..142ade10c
--- /dev/null
+++ b/libc/misc/auxvt/Makefile.in
@@ -0,0 +1,23 @@
+# Makefile for uClibc
+#
+# Copyright (C) 2000-2008 Erik Andersen <andersen@uclibc.org>
+#
+# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+#
+
+subdirs += libc/misc/auxvt
+
+CSRC-y := getauxval.c
+
+MISC_AUXVT_DIR := $(top_srcdir)libc/misc/auxvt
+MISC_AUXVT_OUT := $(top_builddir)libc/misc/auxvt
+
+MISC_AUXVT_SRC := $(patsubst %.c,$(MISC_AUXVT_DIR)/%.c,$(CSRC-y))
+MISC_AUXVT_OBJ := $(patsubst %.c,$(MISC_AUXVT_OUT)/%.o,$(CSRC-y))
+
+libc-y += $(MISC_AUXVT_OBJ)
+
+objclean-y += CLEAN_libc/misc/auxvt
+
+CLEAN_libc/misc/auxvt:
+ $(do_rm) $(addprefix $(MISC_AUXVT_OUT)/*., o os)
diff --git a/libc/misc/auxvt/getauxval.c b/libc/misc/auxvt/getauxval.c
new file mode 100755
index 000000000..b4e621301
--- /dev/null
+++ b/libc/misc/auxvt/getauxval.c
@@ -0,0 +1,40 @@
+/* Copyright (C) 2022 Ramin Seyed Moussavi
+ * An getauxval() function compatible with the glibc auxv.h
+ * that is used by uClibc-ng.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#include "errno.h"
+#include "ldso.h"
+#include "sys/auxv.h"
+
+
+unsigned long int getauxval (unsigned long int __type)
+{
+ if ( __type >= AUX_MAX_AT_ID ){
+ __set_errno (ENOENT);
+ return 0;
+ }
+
+ if ( _dl_auxvt[__type].a_type == __type){
+ return _dl_auxvt[__type].a_un.a_val;
+ }
+
+ __set_errno (ENOENT);
+ return 0;
+}
+
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 07:39:27 +0000