120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
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#include <stdio.h>
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#include "sys/mt.h"
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struct frame {
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unsigned long flags;
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unsigned long ebp;
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unsigned long edi;
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unsigned long esi;
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unsigned long edx;
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unsigned long ecx;
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unsigned long ebx;
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unsigned long eax;
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unsigned long retaddr;
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unsigned long retaddr2;
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unsigned long data;
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};
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/*--------------------------------------------------------------------------*/
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void
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mtarch_init(void)
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{
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}
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/*--------------------------------------------------------------------------*/
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void
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mtarch_start(struct mtarch_thread *t,
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void (*function)(void *), void *data)
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{
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struct frame *f = (struct frame *)&t->stack[MTARCH_STACKSIZE - sizeof(struct frame)/4];
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int i;
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for(i = 0; i < MTARCH_STACKSIZE; ++i) {
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t->stack[i] = i;
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}
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memset(f, 0, sizeof(struct frame));
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f->retaddr = (unsigned long)function;
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f->data = (unsigned long)data;
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t->sp = (unsigned long)&f->flags;
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f->ebp = (unsigned long)&f->eax;
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}
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/*--------------------------------------------------------------------------*/
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static unsigned long spsave, sptmp;
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static struct mtarch_thread *running_thread;
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static void
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sw(void)
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{
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asm("pushl %eax");
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asm("pushl %ebx");
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asm("pushl %ecx");
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asm("pushl %edx");
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asm("pushl %esi");
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asm("pushl %edi");
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asm("pushl %ebp");
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asm("pushl %ebp"); /* XXX: should push FPU flags here. */
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asm("movl %esp, spsave");
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sptmp = running_thread->sp;
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running_thread->sp = spsave;
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asm("movl sptmp, %esp");
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asm("popl %ebp"); /* XXX: should pop FPU flags here. */
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asm("popl %ebp");
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asm("popl %edi");
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asm("popl %esi");
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asm("popl %edx");
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asm("popl %ecx");
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asm("popl %ebx");
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asm("popl %eax");
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}
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/*--------------------------------------------------------------------------*/
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void
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mtarch_exec(struct mtarch_thread *t)
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{
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running_thread = t;
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sw();
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running_thread = NULL;
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}
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/*--------------------------------------------------------------------------*/
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void
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mtarch_remove(void)
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{
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}
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/*--------------------------------------------------------------------------*/
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void
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mtarch_yield(void)
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{
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sw();
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}
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/*--------------------------------------------------------------------------*/
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void
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mtarch_pstop(void)
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{
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}
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/*--------------------------------------------------------------------------*/
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void
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mtarch_pstart(void)
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{
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}
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/*--------------------------------------------------------------------------*/
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int
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mtarch_stack_usage(struct mt_thread *t)
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{
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int i;
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for(i = 0; i < MTARCH_STACKSIZE; ++i) {
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if(t->thread.stack[i] != i) {
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return MTARCH_STACKSIZE - i;
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}
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}
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}
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/*--------------------------------------------------------------------------*/
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