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authorUlrich Drepper <drepper@redhat.com>2003-09-17 18:23:49 +0000
committerUlrich Drepper <drepper@redhat.com>2003-09-17 18:23:49 +0000
commit06f6ca9019897f5d1799c0ae8d7293ed249c0f97 (patch)
tree9a04e5058de47ce0898cf279205c8e58735efb96 /sysdeps/arm
parent65af7e61427ce9bbbc0e43b2ad44e5b4678a37fc (diff)
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Update.
2003-09-17 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/arm/vfork.S: Branch to fork if libpthread is loaded. Elide backwards compatibility code when not required.
Diffstat (limited to 'sysdeps/arm')
-rw-r--r--sysdeps/arm/dl-machine.h72
-rw-r--r--sysdeps/arm/sysdep.h9
2 files changed, 39 insertions, 42 deletions
diff --git a/sysdeps/arm/dl-machine.h b/sysdeps/arm/dl-machine.h
index 9c11f0b28c..15de939a3c 100644
--- a/sysdeps/arm/dl-machine.h
+++ b/sysdeps/arm/dl-machine.h
@@ -123,22 +123,10 @@ elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
return lazy;
}
-/* This code is used in dl-runtime.c to call the `fixup' function
- and then redirect to the address it returns. */
- // macro for handling PIC situation....
-#ifdef PIC
-#define CALL_ROUTINE(x) "\
- ldr sl,0f\n\
- add sl, pc, sl\n\
-1: ldr r2, 2f\n\
- mov lr, pc\n\
- add pc, sl, r2\n\
- b 3f\n\
-0: .word _GLOBAL_OFFSET_TABLE_ - 1b - 4\n\
-2: .word " #x "(GOTOFF)\n\
-3: "
+#if defined(__THUMB_INTERWORK__)
+#define BX(x) "bx\t" #x
#else
-#define CALL_ROUTINE(x) " bl " #x
+#define BX(x) "mov\tpc, " #x
#endif
#ifndef PROF
@@ -153,8 +141,11 @@ _dl_runtime_resolve:\n\
@ ip contains &GOT[n+3] (pointer to function)\n\
@ lr points to &GOT[2]\n\
\n\
- @ save almost everything; lr is already on the stack\n\
- stmdb sp!,{r0-r3,sl,fp}\n\
+ @ stack arguments\n\
+ stmdb sp!,{r0-r3}\n\
+\n\
+ @ get pointer to linker struct\n\
+ ldr r0, [lr, #-4]\n\
\n\
@ prepare to call fixup()\n\
@ change &GOT[n+3] into 8*n NOTE: reloc are 8 bytes each\n\
@@ -162,20 +153,17 @@ _dl_runtime_resolve:\n\
sub r1, r1, #4\n\
add r1, r1, r1\n\
\n\
- @ get pointer to linker struct\n\
- ldr r0, [lr, #-4]\n\
-\n\
@ call fixup routine\n\
- " CALL_ROUTINE(fixup) "\n\
+ bl fixup\n\
\n\
@ save the return\n\
mov ip, r0\n\
\n\
- @ restore the stack\n\
- ldmia sp!,{r0-r3,sl,fp,lr}\n\
+ @ get arguments and return address back\n\
+ ldmia sp!, {r0-r3,lr}\n\
\n\
@ jump to the newly found address\n\
- mov pc, ip\n\
+ " BX(ip) "\n\
\n\
.size _dl_runtime_resolve, .-_dl_runtime_resolve\n\
\n\
@@ -183,8 +171,11 @@ _dl_runtime_resolve:\n\
.type _dl_runtime_profile, #function\n\
.align 2\n\
_dl_runtime_profile:\n\
- @ save almost everything; lr is already on the stack\n\
- stmdb sp!,{r0-r3,sl,fp}\n\
+ @ stack arguments\n\
+ stmdb sp!, {r0-r3}\n\
+\n\
+ @ get pointer to linker struct\n\
+ ldr r0, [lr, #-4]\n\
\n\
@ prepare to call fixup()\n\
@ change &GOT[n+3] into 8*n NOTE: reloc are 8 bytes each\n\
@@ -192,20 +183,17 @@ _dl_runtime_profile:\n\
sub r1, r1, #4\n\
add r1, r1, r1\n\
\n\
- @ get pointer to linker struct\n\
- ldr r0, [lr, #-4]\n\
-\n\
@ call profiling fixup routine\n\
- " CALL_ROUTINE(profile_fixup) "\n\
+ bl profile_fixup\n\
\n\
@ save the return\n\
mov ip, r0\n\
\n\
- @ restore the stack\n\
- ldmia sp!,{r0-r3,sl,fp,lr}\n\
+ @ get arguments and return address back\n\
+ ldmia sp!, {r0-r3,lr}\n\
\n\
@ jump to the newly found address\n\
- mov pc, ip\n\
+ " BX(ip) "\n\
\n\
.size _dl_runtime_resolve, .-_dl_runtime_resolve\n\
.previous\n\
@@ -225,8 +213,11 @@ _dl_runtime_profile:\n\
@ ip contains &GOT[n+3] (pointer to function)\n\
@ lr points to &GOT[2]\n\
\n\
- @ save almost everything; return add is already on the stack\n\
- stmdb sp!,{r0-r3,sl,fp}\n\
+ @ stack arguments\n\
+ stmdb sp!, {r0-r3}\n\
+\n\
+ @ get pointer to linker struct\n\
+ ldr r0, [lr, #-4]\n\
\n\
@ prepare to call fixup()\n\
@ change &GOT[n+3] into 8*n NOTE: reloc are 8 bytes each\n\
@@ -234,20 +225,17 @@ _dl_runtime_profile:\n\
sub r1, r1, #4\n\
add r1, r1, r1\n\
\n\
- @ get pointer to linker struct\n\
- ldr r0, [lr, #-4]\n\
-\n\
@ call profiling fixup routine\n\
- " CALL_ROUTINE(fixup) "\n\
+ bl fixup\n\
\n\
@ save the return\n\
mov ip, r0\n\
\n\
- @ restore the stack\n\
- ldmia sp!,{r0-r3,sl,fp,lr}\n\
+ @ get arguments and return address back\n\
+ ldmia sp!, {r0-r3,lr}\n\
\n\
@ jump to the newly found address\n\
- mov pc, ip\n\
+ " BX(ip) "\n\
\n\
.size _dl_runtime_profile, .-_dl_runtime_profile\n\
.previous\n\
diff --git a/sysdeps/arm/sysdep.h b/sysdeps/arm/sysdep.h
index 4bc7d827b8..cb3f105afe 100644
--- a/sysdeps/arm/sysdep.h
+++ b/sysdeps/arm/sysdep.h
@@ -52,11 +52,20 @@
ldm##cond base,reglist
#define RETINSTR(instr, regs...)\
instr regs
+#ifdef __THUMB_INTERWORK__
+#define DO_RET(_reg) \
+ bx _reg
+#else
+#define DO_RET(_reg) \
+ mov pc, _reg
+#endif
#else /* APCS-26 */
#define LOADREGS(cond, base, reglist...)\
ldm##cond base,reglist^
#define RETINSTR(instr, regs...)\
instr##s regs
+#define DO_RET(_reg) \
+ movs pc, _reg
#endif
/* Define an entry point visible from C. */