diff options
Diffstat (limited to 'libffi/src/arm/sysv.S')
| -rw-r--r-- | libffi/src/arm/sysv.S | 704 |
1 files changed, 267 insertions, 437 deletions
diff --git a/libffi/src/arm/sysv.S b/libffi/src/arm/sysv.S index fb38cd6..fd16589 100644 --- a/libffi/src/arm/sysv.S +++ b/libffi/src/arm/sysv.S @@ -1,8 +1,8 @@ /* ----------------------------------------------------------------------- sysv.S - Copyright (c) 1998, 2008, 2011 Red Hat, Inc. Copyright (c) 2011 Plausible Labs Cooperative, Inc. - - ARM Foreign Function Interface + + ARM Foreign Function Interface Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the @@ -28,477 +28,307 @@ #define LIBFFI_ASM #include <fficonfig.h> #include <ffi.h> -#ifdef HAVE_MACHINE_ASM_H -#include <machine/asm.h> -#else -#ifdef __USER_LABEL_PREFIX__ -#define CONCAT1(a, b) CONCAT2(a, b) -#define CONCAT2(a, b) a ## b - -/* Use the right prefix for global labels. */ -#define CNAME(x) CONCAT1 (__USER_LABEL_PREFIX__, x) -#else -#define CNAME(x) x -#endif -#ifdef __APPLE__ -#define ENTRY(x) .globl _##x; _##x: -#else -#define ENTRY(x) .globl CNAME(x); .type CNAME(x),%function; CNAME(x): -#endif /* __APPLE__ */ -#endif - -#ifdef __ELF__ -#define LSYM(x) .x -#else -#define LSYM(x) x -#endif - -/* Use the SOFTFP return value ABI on Mac OS X, as per the iOS ABI - Function Call Guide */ -#ifdef __APPLE__ -#define __SOFTFP__ -#endif - -/* We need a better way of testing for this, but for now, this is all - we can do. */ -@ This selects the minimum architecture level required. -#define __ARM_ARCH__ 3 - -#if defined(__ARM_ARCH_4__) || defined(__ARM_ARCH_4T__) -# undef __ARM_ARCH__ -# define __ARM_ARCH__ 4 -#endif - -#if defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) \ - || defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) \ - || defined(__ARM_ARCH_5TEJ__) -# undef __ARM_ARCH__ -# define __ARM_ARCH__ 5 -#endif - -#if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \ +#include <ffi_cfi.h> +#include "internal.h" + +/* GCC 4.8 provides __ARM_ARCH; construct it otherwise. */ +#ifndef __ARM_ARCH +# if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \ + || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \ + || defined(__ARM_ARCH_7EM__) +# define __ARM_ARCH 7 +# elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \ || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) \ || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) \ || defined(__ARM_ARCH_6M__) -# undef __ARM_ARCH__ -# define __ARM_ARCH__ 6 -#endif - -#if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \ - || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \ - || defined(__ARM_ARCH_7EM__) -# undef __ARM_ARCH__ -# define __ARM_ARCH__ 7 -#endif - -#if __ARM_ARCH__ >= 5 -# define call_reg(x) blx x -#elif defined (__ARM_ARCH_4T__) -# define call_reg(x) mov lr, pc ; bx x -# if defined(__thumb__) || defined(__THUMB_INTERWORK__) -# define __INTERWORKING__ +# define __ARM_ARCH 6 +# elif defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) \ + || defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) \ + || defined(__ARM_ARCH_5TEJ__) +# define __ARM_ARCH 5 +# else +# define __ARM_ARCH 4 # endif -#else -# define call_reg(x) mov lr, pc ; mov pc, x #endif /* Conditionally compile unwinder directives. */ +.macro UNWIND text:vararg #ifdef __ARM_EABI__ -#define UNWIND -#else -#define UNWIND @ + \text #endif - - -#if defined(__thumb__) && !defined(__THUMB_INTERWORK__) -.macro ARM_FUNC_START name - .text - .align 0 - .thumb - .thumb_func -#ifdef __APPLE__ - ENTRY($0) -#else - ENTRY(\name) -#endif - bx pc - nop - .arm - UNWIND .fnstart -/* A hook to tell gdb that we've switched to ARM mode. Also used to call - directly from other local arm routines. */ -#ifdef __APPLE__ -_L__$0: -#else -_L__\name: -#endif -.endm -#else -.macro ARM_FUNC_START name - .text - .align 0 - .arm -#ifdef __APPLE__ - ENTRY($0) -#else - ENTRY(\name) -#endif - UNWIND .fnstart .endm +#if defined(HAVE_AS_CFI_PSEUDO_OP) && defined(__ARM_EABI__) + .cfi_sections .debug_frame #endif -.macro RETLDM regs=, cond=, dirn=ia -#if defined (__INTERWORKING__) - .ifc "\regs","" - ldr\cond lr, [sp], #4 - .else - ldm\cond\dirn sp!, {\regs, lr} - .endif - bx\cond lr +#define CONCAT(a, b) CONCAT2(a, b) +#define CONCAT2(a, b) a ## b + +#ifdef __USER_LABEL_PREFIX__ +# define CNAME(X) CONCAT (__USER_LABEL_PREFIX__, X) #else - .ifc "\regs","" - ldr\cond pc, [sp], #4 - .else - ldm\cond\dirn sp!, {\regs, pc} - .endif +# define CNAME(X) X +#endif +#ifdef __ELF__ +# define SIZE(X) .size CNAME(X), . - CNAME(X) +# define TYPE(X, Y) .type CNAME(X), Y +#else +# define SIZE(X) +# define TYPE(X, Y) #endif -.endm - - @ r0: ffi_prep_args - @ r1: &ecif - @ r2: cif->bytes - @ r3: fig->flags - @ sp+0: ecif.rvalue - - @ This assumes we are using gas. -ARM_FUNC_START ffi_call_SYSV - @ Save registers - stmfd sp!, {r0-r3, fp, lr} - UNWIND .save {r0-r3, fp, lr} - mov fp, sp - - UNWIND .setfp fp, sp - - @ Make room for all of the new args. - sub sp, fp, r2 - - @ Place all of the ffi_prep_args in position - mov r0, sp - @ r1 already set - - @ Call ffi_prep_args(stack, &ecif) - bl CNAME(ffi_prep_args) - - @ move first 4 parameters in registers - ldmia sp, {r0-r3} - - @ and adjust stack - sub lr, fp, sp @ cif->bytes == fp - sp - ldr ip, [fp] @ load fn() in advance - cmp lr, #16 - movhs lr, #16 - add sp, sp, lr - - @ call (fn) (...) - call_reg(ip) - - @ Remove the space we pushed for the args - mov sp, fp - - @ Load r2 with the pointer to storage for the return value - ldr r2, [sp, #24] - @ Load r3 with the return type code - ldr r3, [sp, #12] +#define ARM_FUNC_START(name, gl) \ + .align 3; \ + .ifne gl; .globl CNAME(name); FFI_HIDDEN(CNAME(name)); .endif; \ + TYPE(name, %function); \ + CNAME(name): - @ If the return value pointer is NULL, assume no return value. - cmp r2, #0 - beq LSYM(Lepilogue) +#define ARM_FUNC_END(name) \ + SIZE(name) -@ return INT - cmp r3, #FFI_TYPE_INT -#if defined(__SOFTFP__) || defined(__ARM_EABI__) - cmpne r3, #FFI_TYPE_FLOAT -#endif - streq r0, [r2] - beq LSYM(Lepilogue) +/* Aid in defining a jump table with 8 bytes between entries. */ +.macro E index + .if . - 0b - 8*\index + .error "type table out of sync" + .endif +.endm - @ return INT64 - cmp r3, #FFI_TYPE_SINT64 -#if defined(__SOFTFP__) || defined(__ARM_EABI__) - cmpne r3, #FFI_TYPE_DOUBLE -#endif - stmeqia r2, {r0, r1} + .text + .syntax unified + .arm -#if !defined(__SOFTFP__) && !defined(__ARM_EABI__) - beq LSYM(Lepilogue) + /* We require interworking on LDM, which implies ARMv5T, + which implies the existance of BLX. */ + .arch armv5t + + /* Note that we use STC and LDC to encode VFP instructions, + so that we do not need ".fpu vfp", nor get that added to + the object file attributes. These will not be executed + unless the FFI_VFP abi is used. */ + + @ r0: stack + @ r1: frame + @ r2: fn + @ r3: vfp_used + +ARM_FUNC_START(ffi_call_VFP, 1) + UNWIND .fnstart + cfi_startproc + + cmp r3, #3 @ load only d0 if possible + ldcle p11, cr0, [r0] @ vldrle d0, [sp] + ldcgt p11, cr0, [r0], {16} @ vldmgt sp, {d0-d7} + add r0, r0, #64 @ discard the vfp register args + /* FALLTHRU */ +ARM_FUNC_END(ffi_call_VFP) + +ARM_FUNC_START(ffi_call_SYSV, 1) + stm r1, {fp, lr} + mov fp, r1 + + @ This is a bit of a lie wrt the origin of the unwind info, but + @ now we've got the usual frame pointer and two saved registers. + UNWIND .save {fp,lr} + UNWIND .setfp fp, sp + cfi_def_cfa(fp, 8) + cfi_rel_offset(fp, 0) + cfi_rel_offset(lr, 4) + + mov sp, r0 @ install the stack pointer + mov lr, r2 @ move the fn pointer out of the way + ldr ip, [fp, #16] @ install the static chain + ldmia sp!, {r0-r3} @ move first 4 parameters in registers. + blx lr @ call fn -@ return FLOAT - cmp r3, #FFI_TYPE_FLOAT - stfeqs f0, [r2] - beq LSYM(Lepilogue) + @ Load r2 with the pointer to storage for the return value + @ Load r3 with the return type code + ldr r2, [fp, #8] + ldr r3, [fp, #12] -@ return DOUBLE or LONGDOUBLE - cmp r3, #FFI_TYPE_DOUBLE - stfeqd f0, [r2] -#endif + @ Deallocate the stack with the arguments. + mov sp, fp + cfi_def_cfa_register(sp) -LSYM(Lepilogue): -#if defined (__INTERWORKING__) - ldmia sp!, {r0-r3,fp, lr} - bx lr -#else - ldmia sp!, {r0-r3,fp, pc} -#endif + @ Store values stored in registers. + .align 3 + add pc, pc, r3, lsl #3 + nop +0: +E ARM_TYPE_VFP_S + stc p10, cr0, [r2] @ vstr s0, [r2] + pop {fp,pc} +E ARM_TYPE_VFP_D + stc p11, cr0, [r2] @ vstr d0, [r2] + pop {fp,pc} +E ARM_TYPE_VFP_N + stc p11, cr0, [r2], {8} @ vstm r2, {d0-d3} + pop {fp,pc} +E ARM_TYPE_INT64 + str r1, [r2, #4] + nop +E ARM_TYPE_INT + str r0, [r2] + pop {fp,pc} +E ARM_TYPE_VOID + pop {fp,pc} + nop +E ARM_TYPE_STRUCT + pop {fp,pc} -.ffi_call_SYSV_end: - UNWIND .fnend -#ifdef __ELF__ - .size CNAME(ffi_call_SYSV),.ffi_call_SYSV_end-CNAME(ffi_call_SYSV) -#endif + cfi_endproc + UNWIND .fnend +ARM_FUNC_END(ffi_call_SYSV) /* - unsigned int FFI_HIDDEN - ffi_closure_SYSV_inner (closure, respp, args) - ffi_closure *closure; - void **respp; - void *args; + int ffi_closure_inner_* (cif, fun, user_data, frame) */ -ARM_FUNC_START ffi_closure_SYSV - UNWIND .pad #16 +ARM_FUNC_START(ffi_go_closure_SYSV, 1) + cfi_startproc + stmdb sp!, {r0-r3} @ save argument regs + cfi_adjust_cfa_offset(16) + ldr r0, [ip, #4] @ load cif + ldr r1, [ip, #8] @ load fun + mov r2, ip @ load user_data + b 0f + cfi_endproc +ARM_FUNC_END(ffi_go_closure_SYSV) + +ARM_FUNC_START(ffi_closure_SYSV, 1) + UNWIND .fnstart + cfi_startproc + stmdb sp!, {r0-r3} @ save argument regs + cfi_adjust_cfa_offset(16) + ldr r0, [ip, #FFI_TRAMPOLINE_SIZE] @ load cif + ldr r1, [ip, #FFI_TRAMPOLINE_SIZE+4] @ load fun + ldr r2, [ip, #FFI_TRAMPOLINE_SIZE+8] @ load user_data +0: + add ip, sp, #16 @ compute entry sp + sub sp, sp, #64+32 @ allocate frame + cfi_adjust_cfa_offset(64+32) + stmdb sp!, {ip,lr} + + /* Remember that EABI unwind info only applies at call sites. + We need do nothing except note the save of the stack pointer + and the link registers. */ + UNWIND .save {sp,lr} + cfi_adjust_cfa_offset(8) + cfi_rel_offset(lr, 4) + + add r3, sp, #8 @ load frame + bl CNAME(ffi_closure_inner_SYSV) + + @ Load values returned in registers. + add r2, sp, #8+64 @ load result + adr r3, CNAME(ffi_closure_ret) + add pc, r3, r0, lsl #3 + cfi_endproc + UNWIND .fnend +ARM_FUNC_END(ffi_closure_SYSV) + +ARM_FUNC_START(ffi_go_closure_VFP, 1) + cfi_startproc + stmdb sp!, {r0-r3} @ save argument regs + cfi_adjust_cfa_offset(16) + ldr r0, [ip, #4] @ load cif + ldr r1, [ip, #8] @ load fun + mov r2, ip @ load user_data + b 0f + cfi_endproc +ARM_FUNC_END(ffi_go_closure_VFP) + +ARM_FUNC_START(ffi_closure_VFP, 1) + UNWIND .fnstart + cfi_startproc + stmdb sp!, {r0-r3} @ save argument regs + cfi_adjust_cfa_offset(16) + ldr r0, [ip, #FFI_TRAMPOLINE_SIZE] @ load cif + ldr r1, [ip, #FFI_TRAMPOLINE_SIZE+4] @ load fun + ldr r2, [ip, #FFI_TRAMPOLINE_SIZE+8] @ load user_data +0: add ip, sp, #16 - stmfd sp!, {ip, lr} - UNWIND .save {r0, lr} - add r2, sp, #8 - UNWIND .pad #16 - sub sp, sp, #16 - str sp, [sp, #8] - add r1, sp, #8 - bl CNAME(ffi_closure_SYSV_inner) - cmp r0, #FFI_TYPE_INT - beq .Lretint - - cmp r0, #FFI_TYPE_FLOAT -#if defined(__SOFTFP__) || defined(__ARM_EABI__) - beq .Lretint -#else - beq .Lretfloat -#endif - - cmp r0, #FFI_TYPE_DOUBLE -#if defined(__SOFTFP__) || defined(__ARM_EABI__) - beq .Lretlonglong -#else - beq .Lretdouble -#endif + sub sp, sp, #64+32 @ allocate frame + cfi_adjust_cfa_offset(64+32) + stc p11, cr0, [sp], {16} @ vstm sp, {d0-d7} + stmdb sp!, {ip,lr} + + /* See above. */ + UNWIND .save {sp,lr} + cfi_adjust_cfa_offset(8) + cfi_rel_offset(lr, 4) + + add r3, sp, #8 @ load frame + bl CNAME(ffi_closure_inner_VFP) + + @ Load values returned in registers. + add r2, sp, #8+64 @ load result + adr r3, CNAME(ffi_closure_ret) + add pc, r3, r0, lsl #3 + cfi_endproc + UNWIND .fnend +ARM_FUNC_END(ffi_closure_VFP) + +/* Load values returned in registers for both closure entry points. + Note that we use LDM with SP in the register set. This is deprecated + by ARM, but not yet unpredictable. */ + +ARM_FUNC_START(ffi_closure_ret, 0) + cfi_startproc + cfi_rel_offset(sp, 0) + cfi_rel_offset(lr, 4) +0: +E ARM_TYPE_VFP_S + ldc p10, cr0, [r2] @ vldr s0, [r2] + ldm sp, {sp,pc} +E ARM_TYPE_VFP_D + ldc p11, cr0, [r2] @ vldr d0, [r2] + ldm sp, {sp,pc} +E ARM_TYPE_VFP_N + ldc p11, cr0, [r2], {8} @ vldm r2, {d0-d3} + ldm sp, {sp,pc} +E ARM_TYPE_INT64 + ldr r1, [r2, #4] + nop +E ARM_TYPE_INT + ldr r0, [r2] + ldm sp, {sp,pc} +E ARM_TYPE_VOID + ldm sp, {sp,pc} + nop +E ARM_TYPE_STRUCT + ldm sp, {sp,pc} + cfi_endproc +ARM_FUNC_END(ffi_closure_ret) - cmp r0, #FFI_TYPE_LONGDOUBLE -#if defined(__SOFTFP__) || defined(__ARM_EABI__) - beq .Lretlonglong -#else - beq .Lretlongdouble -#endif +#if FFI_EXEC_TRAMPOLINE_TABLE - cmp r0, #FFI_TYPE_SINT64 - beq .Lretlonglong -.Lclosure_epilogue: - add sp, sp, #16 - ldmfd sp, {sp, pc} -.Lretint: - ldr r0, [sp] - b .Lclosure_epilogue -.Lretlonglong: - ldr r0, [sp] - ldr r1, [sp, #4] - b .Lclosure_epilogue - -#if !defined(__SOFTFP__) && !defined(__ARM_EABI__) -.Lretfloat: - ldfs f0, [sp] - b .Lclosure_epilogue -.Lretdouble: - ldfd f0, [sp] - b .Lclosure_epilogue -.Lretlongdouble: - ldfd f0, [sp] - b .Lclosure_epilogue -#endif +/* ??? The iOS support should be updated. The first insn used to + be STMFD, but that's been moved into ffi_closure_SYSV. If the + writable page is put after this one we can make use of the + pc+8 feature of the architecture. We can also reduce the size + of the thunk to 8 and pack more of these into the page. -.ffi_closure_SYSV_end: - UNWIND .fnend -#ifdef __ELF__ - .size CNAME(ffi_closure_SYSV),.ffi_closure_SYSV_end-CNAME(ffi_closure_SYSV) -#endif + In the meantime, simply replace the STMFD with a NOP so as to + keep all the magic numbers the same within ffi.c. */ + .align 12 +ARM_FUNC_START(ffi_closure_trampoline_table_page) +.rept 4096 / 12 + nop + ldr ip, [pc, #-4092] + ldr pc, [pc, #-4092] +.endr -/* Below are VFP hard-float ABI call and closure implementations. - Add VFP FPU directive here. This is only compiled into the library - under EABI. */ -#ifdef __ARM_EABI__ - .fpu vfp - - @ r0: fn - @ r1: &ecif - @ r2: cif->bytes - @ r3: fig->flags - @ sp+0: ecif.rvalue - -ARM_FUNC_START ffi_call_VFP - @ Save registers - stmfd sp!, {r0-r3, fp, lr} - UNWIND .save {r0-r3, fp, lr} - mov fp, sp - UNWIND .setfp fp, sp - - @ Make room for all of the new args. - sub sp, sp, r2 - - @ Make room for loading VFP args - sub sp, sp, #64 - - @ Place all of the ffi_prep_args in position - mov r0, sp - @ r1 already set - sub r2, fp, #64 @ VFP scratch space - - @ Call ffi_prep_args(stack, &ecif, vfp_space) - bl CNAME(ffi_prep_args) - - @ Load VFP register args if needed - cmp r0, #0 - beq LSYM(Lbase_args) - - @ Load only d0 if possible - cmp r0, #3 - sub ip, fp, #64 - flddle d0, [ip] - fldmiadgt ip, {d0-d7} - -LSYM(Lbase_args): - @ move first 4 parameters in registers - ldmia sp, {r0-r3} - - @ and adjust stack - sub lr, ip, sp @ cif->bytes == (fp - 64) - sp - ldr ip, [fp] @ load fn() in advance - cmp lr, #16 - movhs lr, #16 - add sp, sp, lr - - @ call (fn) (...) - call_reg(ip) - - @ Remove the space we pushed for the args - mov sp, fp +#else - @ Load r2 with the pointer to storage for - @ the return value - ldr r2, [sp, #24] - - @ Load r3 with the return type code - ldr r3, [sp, #12] - - @ If the return value pointer is NULL, - @ assume no return value. - cmp r2, #0 - beq LSYM(Lepilogue_vfp) - - cmp r3, #FFI_TYPE_INT - streq r0, [r2] - beq LSYM(Lepilogue_vfp) - - cmp r3, #FFI_TYPE_SINT64 - stmeqia r2, {r0, r1} - beq LSYM(Lepilogue_vfp) - - cmp r3, #FFI_TYPE_FLOAT - fstseq s0, [r2] - beq LSYM(Lepilogue_vfp) - - cmp r3, #FFI_TYPE_DOUBLE - fstdeq d0, [r2] - beq LSYM(Lepilogue_vfp) - - cmp r3, #FFI_TYPE_STRUCT_VFP_FLOAT - cmpne r3, #FFI_TYPE_STRUCT_VFP_DOUBLE - fstmiadeq r2, {d0-d3} - -LSYM(Lepilogue_vfp): - RETLDM "r0-r3,fp" - -.ffi_call_VFP_end: - UNWIND .fnend - .size CNAME(ffi_call_VFP),.ffi_call_VFP_end-CNAME(ffi_call_VFP) - - -ARM_FUNC_START ffi_closure_VFP - fstmfdd sp!, {d0-d7} - @ r0-r3, then d0-d7 - UNWIND .pad #80 - add ip, sp, #80 - stmfd sp!, {ip, lr} - UNWIND .save {r0, lr} - add r2, sp, #72 - add r3, sp, #8 - UNWIND .pad #72 - sub sp, sp, #72 - str sp, [sp, #64] - add r1, sp, #64 - bl CNAME(ffi_closure_SYSV_inner) - - cmp r0, #FFI_TYPE_INT - beq .Lretint_vfp - - cmp r0, #FFI_TYPE_FLOAT - beq .Lretfloat_vfp - - cmp r0, #FFI_TYPE_DOUBLE - cmpne r0, #FFI_TYPE_LONGDOUBLE - beq .Lretdouble_vfp - - cmp r0, #FFI_TYPE_SINT64 - beq .Lretlonglong_vfp - - cmp r0, #FFI_TYPE_STRUCT_VFP_FLOAT - beq .Lretfloat_struct_vfp - - cmp r0, #FFI_TYPE_STRUCT_VFP_DOUBLE - beq .Lretdouble_struct_vfp - -.Lclosure_epilogue_vfp: - add sp, sp, #72 - ldmfd sp, {sp, pc} - -.Lretfloat_vfp: - flds s0, [sp] - b .Lclosure_epilogue_vfp -.Lretdouble_vfp: - fldd d0, [sp] - b .Lclosure_epilogue_vfp -.Lretint_vfp: - ldr r0, [sp] - b .Lclosure_epilogue_vfp -.Lretlonglong_vfp: - ldmia sp, {r0, r1} - b .Lclosure_epilogue_vfp -.Lretfloat_struct_vfp: - fldmiad sp, {d0-d1} - b .Lclosure_epilogue_vfp -.Lretdouble_struct_vfp: - fldmiad sp, {d0-d3} - b .Lclosure_epilogue_vfp - -.ffi_closure_VFP_end: - UNWIND .fnend - .size CNAME(ffi_closure_VFP),.ffi_closure_VFP_end-CNAME(ffi_closure_VFP) -#endif +ARM_FUNC_START(ffi_arm_trampoline, 1) +0: adr ip, 0b + ldr pc, 1f +1: .long 0 +ARM_FUNC_END(ffi_arm_trampoline) -ENTRY(ffi_arm_trampoline) - stmfd sp!, {r0-r3} - ldr r0, [pc] - ldr pc, [pc] +#endif /* FFI_EXEC_TRAMPOLINE_TABLE */ #if defined __ELF__ && defined __linux__ .section .note.GNU-stack,"",%progbits |