mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 15:30:07 +00:00
58 lines
1.7 KiB
ArmAsm
58 lines
1.7 KiB
ArmAsm
/* Copyright (C) 2011 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include <jmpbuf-offsets.h>
|
|
#include <asm-syntax.h>
|
|
#include <arch/spr_def.h>
|
|
|
|
/* PL to return to via iret in longjmp */
|
|
#define RETURN_PL 0
|
|
|
|
.text
|
|
ENTRY (__longjmp)
|
|
FEEDBACK_ENTER(__longjmp)
|
|
|
|
#define RESTORE(r) { LD r, r0 ; ADDI_PTR r0, r0, REGSIZE }
|
|
FOR_EACH_CALLEE_SAVED_REG(RESTORE)
|
|
|
|
/* Make longjmp(buf, 0) return "1" instead.
|
|
At the same time, construct our iret context; we set ICS so
|
|
we can validly load EX_CONTEXT for iret without being
|
|
interrupted halfway through. */
|
|
{
|
|
LD r2, r0 /* retrieve ICS bit from jmp_buf */
|
|
movei r3, 1
|
|
CMPEQI r0, r1, 0
|
|
}
|
|
{
|
|
mtspr INTERRUPT_CRITICAL_SECTION, r3
|
|
shli r2, r2, SPR_EX_CONTEXT_0_1__ICS_SHIFT
|
|
}
|
|
{
|
|
mtspr EX_CONTEXT_0_0, lr
|
|
ori r2, r2, RETURN_PL
|
|
}
|
|
{
|
|
or r0, r1, r0
|
|
mtspr EX_CONTEXT_0_1, r2
|
|
}
|
|
iret
|
|
jrp lr /* Keep the backtracer happy. */
|
|
END (__longjmp)
|