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* fork.cc (vfork): Store complete stack frame in vfork_save structure for later

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recovery.
* spawn.cc (spawn_guts): Reorganize slightly to consolidate handling when there
is a CreateProcess error.
(_spawnve): Only longjmp back to vfork handling when a process has been
successfuly started.
* winsup.h (vfork_save): Extend to include frame info.  Remove obsolete cpplus
conditionals.
This commit is contained in:
Christopher Faylor
2000-08-03 03:02:41 +00:00
parent 6a2ef32105
commit 47026c0785
4 changed files with 33 additions and 22 deletions
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14
winsup/cygwin/fork.cc
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@ -639,6 +639,7 @@ vfork ()
return fork ();
#else
vfork_save *vf = get_vfork_val ();
char **esp, **pp;
if (vf == NULL)
vf = vfork_storage.create ();
@ -646,9 +647,11 @@ vfork ()
if (!setjmp (vf->j))
{
vf->pid = -1;
__asm__ volatile ("movl %%esp,%0": "=r" (vf->vfork_esp):);
__asm__ volatile ("movl %%ebp,%0": "=r" (vf->vfork_ebp):);
__asm__ volatile ("movl (%%ebp),%0": "=r" (vf->caller_ebp):);
__asm__ volatile ("movl 4(%%ebp),%0": "=r" (vf->retaddr):);
for (pp = (char **)vf->frame, esp = vf->vfork_esp;
esp <= vf->vfork_ebp + 1; pp++, esp++)
*pp = *esp;
return dtable.vfork_child_dup () ? 0 : -1;
}
@ -662,8 +665,11 @@ vfork ()
exit (exitval);
}
vf->vfork_ebp[0] = vf->caller_ebp;
vf->vfork_ebp[1] = vf->retaddr;
__asm__ volatile ("movl %%esp,%0": "=r" (esp):);
for (pp = (char **)vf->frame, esp = vf->vfork_esp;
esp <= vf->vfork_ebp + 1; pp++, esp++)
*esp = *pp;
return vf->pid;
#endif
}