HIDDEN int
x86_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
{
struct cursor *c = (struct cursor *) cursor;
ucontext_t *uc = c->uc;
/* Ensure c->pi is up-to-date. On x86, it's relatively common to be
missing DWARF unwind info. We don't want to fail in that case,
because the frame-chain still would let us do a backtrace at
least. */
dwarf_make_proc_info (&c->dwarf);
if (c->sigcontext_format == X86_SCF_NONE) {
Debug (8, "resuming at ip=%x via setcontext()\n", c->dwarf.ip);
setcontext (uc);
abort();
} else if (c->sigcontext_format == X86_SCF_FREEBSD_SIGFRAME) {
struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
Debug (8, "resuming at ip=%x via sigreturn(%p)\n", c->dwarf.ip, sc);
sigreturn((ucontext_t *)((const char *)sc + FREEBSD_SC_UCONTEXT_OFF));
abort();
} else {
Debug (8, "resuming at ip=%x for sigcontext format %d not implemented\n",
c->dwarf.ip, c->sigcontext_format);
abort();
}
return -UNW_EINVAL;
}
//Called after context has been placed on stack
void sigtramp(void (*handler)(void *), void *cntx, void *osp)
{
void (*myHandler)(void *);
myHandler = handler;
(*myHandler)(cntx);
sigreturn(osp);
}
HIDDEN int
x86_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
{
struct cursor *c = (struct cursor *) cursor;
ucontext_t *uc = c->uc;
/* Ensure c->pi is up-to-date. On x86, it's relatively common to be
missing DWARF unwind info. We don't want to fail in that case,
because the frame-chain still would let us do a backtrace at
least. */
dwarf_make_proc_info (&c->dwarf);
if (unlikely (c->sigcontext_format != X86_SCF_NONE))
{
#if (!HAVE_SGX)
struct sigcontext *sc = (struct sigcontext *) c->sigcontext_addr;
Debug (8, "resuming at ip=%x via sigreturn(%p)\n", c->dwarf.ip, sc);
sigreturn (sc);
#endif
}
else
{
Debug (8, "resuming at ip=%x via setcontext()\n", c->dwarf.ip);
setcontext (uc);
}
return -UNW_EINVAL;
}
void sigtramp(void (*handler)(void *), void *cntx, void *osp){
//kprintf("in sigtramp\n");
//while(1);
handler(cntx);
sigreturn(osp);
}
void sigtramp(void (*handler)(void *), void *contextFrame, void *old_sp) {
kprintf("in sigtramp()\n");
kprintf("Handler: %d\n", handler);
kprintf("old_sp: %d\n", old_sp);
context_frame* cFrame = (context_frame*) contextFrame;
kprintf("context frame: %d; ebp: %d, esp: %d, eip: %d\n",
cFrame, cFrame->ebp, cFrame->esp, cFrame->iret_eip);
/*
int i;
for(i = 0; i < 100000000; i++);
*/
handler(cFrame);
sigreturn(old_sp);
/* Control never gets back to here */
}
int sys_sigreturn(void){
return sigreturn();
}