47 lines
1.4 KiB
ArmAsm
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"
|