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Diffstat (limited to 'gcc-4.4.3/libffi/src/arm/sysv.S')
| -rw-r--r-- | gcc-4.4.3/libffi/src/arm/sysv.S | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/gcc-4.4.3/libffi/src/arm/sysv.S b/gcc-4.4.3/libffi/src/arm/sysv.S new file mode 100644 index 000000000..b68027836 --- /dev/null +++ b/gcc-4.4.3/libffi/src/arm/sysv.S @@ -0,0 +1,305 @@ +/* ----------------------------------------------------------------------- + sysv.S - Copyright (c) 1998 Red Hat, Inc. + + 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 + ``Software''), to deal in the Software without restriction, including + without limitation the rights to use, copy, modify, merge, publish, + distribute, sublicense, and/or sell copies of the Software, and to + permit persons to whom the Software is furnished to do so, subject to + the following conditions: + + The above copyright notice and this permission notice shall be included + in all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS + OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + IN NO EVENT SHALL CYGNUS SOLUTIONS BE LIABLE FOR ANY CLAIM, DAMAGES OR + OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + OTHER DEALINGS IN THE SOFTWARE. + ----------------------------------------------------------------------- */ + +#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 +#define ENTRY(x) .globl CNAME(x); .type CNAME(x),%function; CNAME(x): +#endif + +#ifdef __ELF__ +#define LSYM(x) .x +#else +#define LSYM(x) x +#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__) \ + || 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__) +# 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__ +# endif +#else +# define call_reg(x) mov lr, pc ; mov pc, x +#endif + +/* Conditionally compile unwinder directives. */ +#ifdef __ARM_EABI__ +#define UNWIND +#else +#define UNWIND @ +#endif + + +#if defined(__thumb__) && !defined(__THUMB_INTERWORK__) +.macro ARM_FUNC_START name + .text + .align 0 + .thumb + .thumb_func + ENTRY(\name) + 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. */ +_L__\name: +.endm +#else +.macro ARM_FUNC_START name + .text + .align 0 + .arm + ENTRY(\name) + UNWIND .fnstart +.endm +#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 +#else + .ifc "\regs","" + ldr\cond pc, [sp], #4 + .else + ldm\cond\dirn sp!, {\regs, pc} + .endif +#endif +.endm + + + @ r0: ffi_prep_args + @ r1: &ecif + @ r2: cif->bytes + @ r3: fig->flags + @ sp+0: ecif.rvalue + @ sp+4: fn + + @ 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 ip, r0 + mov r0, sp + @ r1 already set + + @ Call ffi_prep_args(stack, &ecif) + call_reg(ip) + + @ move first 4 parameters in registers + ldmia sp, {r0-r3} + + @ and adjust stack + ldr ip, [fp, #8] + cmp ip, #16 + movhs ip, #16 + add sp, sp, ip + + @ call (fn) (...) + ldr ip, [fp, #28] + 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] + + @ If the return value pointer is NULL, assume no return value. + cmp r2, #0 + beq LSYM(Lepilogue) + +@ 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) + + @ return INT64 + cmp r3, #FFI_TYPE_SINT64 +#if defined(__SOFTFP__) || defined(__ARM_EABI__) + cmpne r3, #FFI_TYPE_DOUBLE +#endif + stmeqia r2, {r0, r1} + +#if !defined(__SOFTFP__) && !defined(__ARM_EABI__) + beq LSYM(Lepilogue) + +@ return FLOAT + cmp r3, #FFI_TYPE_FLOAT + stfeqs f0, [r2] + beq LSYM(Lepilogue) + +@ return DOUBLE or LONGDOUBLE + cmp r3, #FFI_TYPE_DOUBLE + stfeqd f0, [r2] +#endif + +LSYM(Lepilogue): + RETLDM "r0-r3,fp" + +.ffi_call_SYSV_end: + UNWIND .fnend + .size CNAME(ffi_call_SYSV),.ffi_call_SYSV_end-CNAME(ffi_call_SYSV) + +/* + unsigned int FFI_HIDDEN + ffi_closure_SYSV_inner (closure, respp, args) + ffi_closure *closure; + void **respp; + void *args; +*/ + +ARM_FUNC_START ffi_closure_SYSV + UNWIND .pad #16 + add ip, sp, #16 + stmfd sp!, {ip, lr} + UNWIND .save {r0, lr} + add r2, sp, #8 + .pad #16 + sub sp, sp, #16 + str sp, [sp, #8] + add r1, sp, #8 + bl 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 + + cmp r0, #FFI_TYPE_LONGDOUBLE +#if defined(__SOFTFP__) || defined(__ARM_EABI__) + beq .Lretlonglong +#else + beq .Lretlongdouble +#endif + + 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 + +.ffi_closure_SYSV_end: + UNWIND .fnend + .size CNAME(ffi_closure_SYSV),.ffi_closure_SYSV_end-CNAME(ffi_closure_SYSV) + +#if defined __ELF__ && defined __linux__ + .section .note.GNU-stack,"",%progbits +#endif |