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-rw-r--r--libc/misc/internals/Makefile.in2
-rw-r--r--libc/misc/internals/reloc_static_pie.c93
-rw-r--r--libc/sysdeps/linux/mips/crt1.S23
3 files changed, 102 insertions, 16 deletions
diff --git a/libc/misc/internals/Makefile.in b/libc/misc/internals/Makefile.in
index 69af8b76e..908b18321 100644
--- a/libc/misc/internals/Makefile.in
+++ b/libc/misc/internals/Makefile.in
@@ -17,7 +17,7 @@ MISC_INTERNALS_SRC := $(patsubst %.c,$(MISC_INTERNALS_DIR)/%.c,$(CSRC-y))
MISC_INTERNALS_OBJ := $(patsubst %.c,$(MISC_INTERNALS_OUT)/%.o,$(CSRC-y))
CFLAGS-__uClibc_main.c := $(SSP_DISABLE_FLAGS)
-CFLAGS-reloc_static_pie.c := $(SSP_DISABLE_FLAGS)
+CFLAGS-reloc_static_pie.c := $(SSP_DISABLE_FLAGS) -DL_rcrt1
libc-y += $(MISC_INTERNALS_OBJ)
ifneq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
diff --git a/libc/misc/internals/reloc_static_pie.c b/libc/misc/internals/reloc_static_pie.c
index 578202d23..c0027de6f 100644
--- a/libc/misc/internals/reloc_static_pie.c
+++ b/libc/misc/internals/reloc_static_pie.c
@@ -15,33 +15,96 @@
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
-
+#define IS_IN_rtld // force inline function calls
#include <link.h>
#include <elf.h>
#include <dl-elf.h>
+#include <ldso.h>
+#ifdef __mips__
+#include <dl-startup.h>
+#endif
+
ElfW(Addr) _dl_load_base = NULL;
void
reloc_static_pie (ElfW(Addr) load_addr);
void
-reloc_static_pie (ElfW(Addr) load_addr)
+reloc_static_pie(ElfW(Addr) load_addr)
{
- ElfW(Word) relative_count = 0;
- ElfW(Addr) rel_addr = 0;
- ElfW(Dyn) * dyn_addr = NULL;
- unsigned long dynamic_info[DYNAMIC_SIZE] = {0};
+ int indx;
+ ElfW(Addr) got;
+ ElfW(Dyn) *dpnt;
+ struct elf_resolve tpnt_tmp;
+ struct elf_resolve *tpnt = &tpnt_tmp;
+
+ DL_BOOT_COMPUTE_GOT(got);
+ DL_BOOT_COMPUTE_DYN(dpnt, got, (DL_LOADADDR_TYPE)load_addr);
+
+ _dl_memset(tpnt, 0, sizeof(struct elf_resolve));
+ tpnt->loadaddr = load_addr;
+ tpnt->dynamic_addr = dpnt;
+
+ __dl_parse_dynamic_info(dpnt, tpnt->dynamic_info, NULL, load_addr);
+
+#if defined(PERFORM_BOOTSTRAP_GOT)
+ /* some arches (like MIPS) we have to tweak the GOT before relocations */
+ PERFORM_BOOTSTRAP_GOT(tpnt);
+#endif
+
+
+#if defined(ELF_MACHINE_PLTREL_OVERLAP)
+# define INDX_MAX 1
+#else
+# define INDX_MAX 2
+#endif
+
+ for (indx = 0; indx < INDX_MAX; indx++) {
+ unsigned long rel_addr, rel_size;
+ ElfW(Word) relative_count = tpnt->dynamic_info[DT_RELCONT_IDX];
+
+ rel_addr = (indx ? tpnt->dynamic_info[DT_JMPREL] :
+ tpnt->dynamic_info[DT_RELOC_TABLE_ADDR]);
+ rel_size = (indx ? tpnt->dynamic_info[DT_PLTRELSZ] :
+ tpnt->dynamic_info[DT_RELOC_TABLE_SIZE]);
+
+ if (!rel_addr)
+ continue;
- /* Read our own dynamic section and fill in the info array. */
- dyn_addr = ((void *) load_addr + elf_machine_dynamic ());
+ if((0 == indx) && relative_count) {
+ rel_size -= relative_count * sizeof(ELF_RELOC);
+ elf_machine_relative(load_addr, rel_addr, relative_count);
+ rel_addr += relative_count * sizeof(ELF_RELOC);
+ }
- /* Use the underlying function to avoid TLS access before initialization */
- __dl_parse_dynamic_info(dyn_addr, dynamic_info, NULL, load_addr);
+#ifdef ARCH_NEEDS_BOOTSTRAP_RELOCS
+ {
+ ELF_RELOC *rpnt;
+ unsigned int i;
+ ElfW(Sym) *sym;
+ unsigned long symbol_addr;
+ int symtab_index;
+ unsigned long *reloc_addr;
- /* Perform relocations */
- relative_count = dynamic_info[DT_RELCONT_IDX];
- rel_addr = dynamic_info[DT_RELOC_TABLE_ADDR];
- elf_machine_relative(load_addr, rel_addr, relative_count);
+ /* Now parse the relocation information */
+ rpnt = (ELF_RELOC *) rel_addr;
+ for (i = 0; i < rel_size; i += sizeof(ELF_RELOC), rpnt++) {
+ reloc_addr = (unsigned long *) DL_RELOC_ADDR(load_addr, (unsigned long)rpnt->r_offset);
+ symtab_index = ELF_R_SYM(rpnt->r_info);
+ symbol_addr = 0;
+ sym = NULL;
+ if (symtab_index) {
+ ElfW(Sym) *symtab;
+ symtab = (ElfW(Sym) *) tpnt->dynamic_info[DT_SYMTAB];
+ sym = &symtab[symtab_index];
+ symbol_addr = (unsigned long) DL_RELOC_ADDR(load_addr, sym->st_value);
+ }
+ /* Use this machine-specific macro to perform the actual relocation. */
+ PERFORM_BOOTSTRAP_RELOC(rpnt, reloc_addr, symbol_addr, load_addr, sym);
+ }
+ }
+#endif
+ }
_dl_load_base = load_addr;
-}
+} \ No newline at end of file
diff --git a/libc/sysdeps/linux/mips/crt1.S b/libc/sysdeps/linux/mips/crt1.S
index 083615515..7c4db447c 100644
--- a/libc/sysdeps/linux/mips/crt1.S
+++ b/libc/sysdeps/linux/mips/crt1.S
@@ -78,6 +78,10 @@
.weak _init
.weak _fini
#endif
+#ifdef L_rcrt1
+ .type reloc_static_pie,@function
+ .hidden .L0
+#endif
.type main,@function
.type __uClibc_main,@function
.ent __start
@@ -90,6 +94,25 @@ __start:
PTR_LA $28, _gp /* Setup GP correctly if we're non-PIC. */
move $31, $0
#endif
+#ifdef L_rcrt1
+ PTR_LA $4, _DYNAMIC /* Place _DYNAMIC into the GOT */
+ REG_S $4, -0x7ff0($28) /* offset to GOT stolen from dl-startup */
+ jal .L0 /* Get the current $pc address */
+.L0:
+ PTR_SUBU $4, $31, $25 /* Calculate load addr */
+ move $31, $0 /* Clear ra */
+ and $29, -2 * SZREG /* Ensure stack is aligned */
+ PTR_ADDIU $29, (-2 * SZREG) /* Allocate 2 register spaces on stack */
+ REG_S $2, SZREG($29) /* Store atexit in case it exists */
+ PTR_LA $5, reloc_static_pie /* function calls before relocation
+ don't work unless we set $t9 manually */
+ PTR_ADDU $25, $4, $5 /* store reloc_static_pie in $t9 */
+ jalr $25 /* call reloc_static_pie */
+ nop /* delay slot, just in case */
+ REG_L $2, SZREG($29) /* cleanup stack */
+ PTR_ADDIU $29, $29, (2 * SZREG)
+
+#endif
PTR_LA $4, main /* main */
PTR_L $5, 0($29) /* argc */