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/* vacall function for arm CPU */
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* Copyright 1995-2004 Bruno Haible, <bruno@clisp.org>
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* This is free software distributed under the GNU General Public Licence
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* described in the file COPYING. Contact the author if you don't have this
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* or can't live with it. There is ABSOLUTELY NO WARRANTY, explicit or implied,
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#include "vacall.h.in"
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#include "vacall_r.h.in"
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#define __vacall __vacall_r
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register struct { void (*vacall_function) (void*,va_alist); void* arg; }
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register __vaword iret __asm__("r0");
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register __vaword iret2 __asm__("r1");
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register float fret __asm__("f0");
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register double dret __asm__("f0");
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void /* the return type is variable, not void! */
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__vacall (__vaword word1, __vaword word2, __vaword word3, __vaword word4,
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struct { long retaddr, arg1, arg2, arg3, arg4; } args;
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* This is the last struct on the stack, so that
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* &args + 1 == &return_address == &firstword - 1.
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* Look at the assembly code to convince yourself.
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/* Move the arguments passed in registers to their stack locations. */
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args.retaddr = (&firstword)[-1]; /* save the return address */
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(&firstword)[-4] = word1;
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(&firstword)[-3] = word2;
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(&firstword)[-2] = word3;
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(&firstword)[-1] = word4;
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/* Prepare the va_alist. */
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list.aptr = (long)(&firstword - 4);
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list.raddr = (void*)0;
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list.rtype = __VAvoid;
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/* Call vacall_function. The macros do all the rest. */
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(*vacall_function) (&list);
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(*env->vacall_function) (env->arg,&list);
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/* Put return value into proper register. */
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if (list.rtype == __VAvoid) {
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if (list.rtype == __VAchar) {
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iret = list.tmp._char;
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if (list.rtype == __VAschar) {
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iret = list.tmp._schar;
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if (list.rtype == __VAuchar) {
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iret = list.tmp._uchar;
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if (list.rtype == __VAshort) {
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iret = list.tmp._short;
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if (list.rtype == __VAushort) {
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iret = list.tmp._ushort;
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if (list.rtype == __VAint) {
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if (list.rtype == __VAuint) {
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iret = list.tmp._uint;
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if (list.rtype == __VAlong) {
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iret = list.tmp._long;
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if (list.rtype == __VAulong) {
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iret = list.tmp._ulong;
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if (list.rtype == __VAlonglong || list.rtype == __VAulonglong) {
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iret = ((__vaword *) &list.tmp._longlong)[0];
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iret2 = ((__vaword *) &list.tmp._longlong)[1];
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if (list.rtype == __VAfloat) {
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fret = list.tmp._float;
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if (list.rtype == __VAdouble) {
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dret = list.tmp._double;
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if (list.rtype == __VAvoidp) {
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iret = (long)list.tmp._ptr;
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if (list.rtype == __VAstruct) {
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/* NB: On arm, all structure sizes are divisible by 4. */
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if (list.flags & __VA_PCC_STRUCT_RETURN) {
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/* pcc struct return convention */
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iret = (long) list.raddr;
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/* normal struct return convention */
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if (list.flags & __VA_REGISTER_STRUCT_RETURN) {
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if (list.rsize == sizeof(char)) { /* can't occur */
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iret = *(unsigned char *) list.raddr;
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if (list.rsize == sizeof(short)) { /* can't occur */
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iret = *(unsigned short *) list.raddr;
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if (list.rsize == sizeof(int)) {
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iret = *(unsigned int *) list.raddr;
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if (list.rsize == 2*sizeof(__vaword)) {
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iret = ((__vaword *) list.raddr)[0];
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iret2 = ((__vaword *) list.raddr)[1];
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(&firstword)[-1] = args.retaddr; /* restore the return address */
added
removed
ffcall/callback/vacall_r/vacall-arm.c
