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fork: fpregs: return error code.

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Change-Id: I6ff150a39cd8952adad9b21d0c9f8514126ef957
This commit is contained in:
TOIDA,Suguru
2019-08-20 12:15:45 +09:00
committed by Masamichi Takagi
parent de0e07f29e
commit 58f4593478
5 changed files with 56 additions and 30 deletions
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30
arch/x86_64/kernel/cpu.c
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@@ -1,4 +1,4 @@
/* cpu.c COPYRIGHT FUJITSU LIMITED 2018 */
/* cpu.c COPYRIGHT FUJITSU LIMITED 2018-2019 */
/**
* \file cpu.c
* License details are found in the file LICENSE.
@@ -1709,7 +1709,7 @@ check_and_allocate_fp_regs(struct thread *thread)
if (!thread->fp_regs) {
kprintf("error: allocating fp_regs pages\n");
result = 1;
result = -ENOMEM;
goto out;
}
@@ -1722,12 +1722,14 @@ out:
/*@
@ requires \valid(thread);
@*/
void
int
save_fp_regs(struct thread *thread)
{
if (check_and_allocate_fp_regs(thread) != 0) {
// alloc error
return;
int ret = 0;
ret = check_and_allocate_fp_regs(thread);
if (ret) {
goto out;
}
if (xsave_available) {
@@ -1742,13 +1744,23 @@ save_fp_regs(struct thread *thread)
dkprintf("fp_regs for TID %d saved\n", thread->tid);
}
out:
return ret;
}
void copy_fp_regs(struct thread *from, struct thread *to)
int copy_fp_regs(struct thread *from, struct thread *to)
{
if ((from->fp_regs != NULL) && (check_and_allocate_fp_regs(to) == 0)) {
memcpy(to->fp_regs, from->fp_regs, sizeof(fp_regs_struct));
int ret = 0;
if (from->fp_regs != NULL) {
ret = check_and_allocate_fp_regs(to);
if (!ret) {
memcpy(to->fp_regs,
from->fp_regs,
sizeof(fp_regs_struct));
}
}
return ret;
}
/*@