diff options
Diffstat (limited to 'sysdeps/arm')
| -rw-r--r-- | sysdeps/arm/dl-machine.h | 72 | ||||
| -rw-r--r-- | sysdeps/arm/sysdep.h | 9 |
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. */ |