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Setup the child's return values correctly when forking an IA-32 process.

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This commit is contained in:
Doug Rabson 2002-04-21 12:34:58 +00:00
parent bd41864183
commit fb767b2d4e
1 changed files with 11 additions and 3 deletions
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14
sys/ia64/ia64/vm_machdep.c
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@ -94,6 +94,8 @@
#include <sys/user.h>
#include <i386/include/psl.h>
/*
* quick version of vm_fault
*/
@ -198,9 +200,15 @@ cpu_fork(td1, p2, td2, flags)
* Set up return-value registers as fork() libc stub expects.
*/
p2tf = td2->td_frame;
p2tf->tf_r[FRAME_R8] = 0; /* child's pid (linux) */
p2tf->tf_r[FRAME_R9] = 1; /* is child (FreeBSD) */
p2tf->tf_r[FRAME_R10] = 0; /* no error */
if (p2tf->tf_cr_ipsr & IA64_PSR_IS) {
p2tf->tf_r[FRAME_R8] = 0; /* child returns zero (eax) */
p2tf->tf_r[FRAME_R10] = 1; /* is child (edx) */
td2->td_pcb->pcb_eflag &= ~PSL_C; /* no error */
} else {
p2tf->tf_r[FRAME_R8] = 0; /* child's pid (linux) */
p2tf->tf_r[FRAME_R9] = 1; /* is child (FreeBSD) */
p2tf->tf_r[FRAME_R10] = 0; /* no error */
}
/*
* Turn off RSE for a moment and work out our current