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/* setjmp for arm, ELF version.
Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <sysdep.h>
#define _ASM
#define _SETJMP_H
#include <bits/setjmp.h>
/* We include the BSD entry points here as well but we make
them weak. */
ENTRY (setjmp)
.weak C_SYMBOL_NAME (setjmp)
@ call comes here with
@ lr = return pc
@ r0 = &jump_buf
@ add a second argument into the fray
mov r1, #1
@ call the common code
b __sigsetjmp(PLT)
END (setjmp)
/* Binary compatibility entry point. */
ENTRY (_setjmp)
.weak C_SYMBOL_NAME (_setjmp)
ENTRY (__setjmp)
@ call comes here with
@ lr = return pc
@ r0 = &jump_buf
@ add a second argument into the fray
mov r1, #1
@ fall through to the common code....
ENTRY (__sigsetjmp)
@ save the registers into the jmp_buf....
stmia r0, {r1-r6, sl, fp, sp, lr}
/* Make a tail call to __sigjmp_save; it takes the same args. */
#ifdef PIC
/* We cannot use the PLT, because it requires that sl==r10 be set, but
we can't save and restore our caller's value. Instead, we do an
indirect jump through the GOT, using for the temporary register
ip, which is call-clobbered. */
ldr ip, 1f
add ip, ip, pc
2: @ get the address of __sigjmp_save
ldr r1, 3f
ldr ip, [ip, r1]
@ restore r1
ldr r1, [r0]
@ jump to *__sigjmp_save
mov pc, ip
1: .word _GLOBAL_OFFSET_TABLE_ - 2b - 4
3: .word __sigjmp_save(GOT)
#else
b __sigjmp_save
#endif
END (__sigsetjmp)
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