factor/vm/cpu-x86.32.S

47 lines
1.4 KiB
ArmAsm

#include "asm.h"
/* Note that primitive word definitions are compiled with
__attribute__((regparm 2), so the pointer to the word object is passed in EAX,
and the callstack top is passed in EDX */
#define ARG0 %eax
#define ARG1 %edx
#define XT_REG %ecx
#define STACK_REG %esp
#define DS_REG %esi
#define RETURN_REG %eax
#define CELL_SIZE 4
#define PUSH_NONVOLATILE \
push %ebx ; \
push %ebp
#define POP_NONVOLATILE \
pop %ebp ; \
pop %ebx
#define QUOT_XT_OFFSET 9
#define PROFILING_OFFSET 25
#define WORD_DEF_OFFSET 13
#define WORD_XT_OFFSET 29
/* We pass a function pointer to memcpy to work around a Mac OS X
ABI limitation which would otherwise require us to do a bizzaro PC-relative
trampoline to retrieve the function address */
DEF(void,set_callstack,(F_STACK_FRAME *to, F_STACK_FRAME *from, CELL length, void *memcpy)):
mov 4(%esp),%ebp /* to */
mov 8(%esp),%edx /* from */
mov 12(%esp),%ecx /* length */
mov 16(%esp),%eax /* memcpy */
sub %ecx,%ebp /* compute new stack pointer */
mov %ebp,%esp
push %ecx /* pass length */
push %edx /* pass src */
push %ebp /* pass dst */
call *%eax /* call memcpy */
add $12,%esp /* pop args from the stack */
ret /* return _with new stack_ */
#include "cpu-x86.S"