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/* Common target dependent code for GNU/Linux on ARM systems.
Copyright (C) 1999-2016 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "common-defs.h"
#include "arch/arm.h"
#include "arm-linux.h"
/* Calculate the offset from stack pointer of the pc register on the stack
in the case of a sigreturn or sigreturn_rt syscall. */
int
arm_linux_sigreturn_next_pc_offset (unsigned long sp,
unsigned long sp_data,
unsigned long svc_number,
int is_sigreturn)
{
/* Offset of R0 register. */
int r0_offset = 0;
/* Offset of PC register. */
int pc_offset = 0;
if (is_sigreturn)
{
if (sp_data == ARM_NEW_SIGFRAME_MAGIC)
r0_offset = ARM_UCONTEXT_SIGCONTEXT + ARM_SIGCONTEXT_R0;
else
r0_offset = ARM_SIGCONTEXT_R0;
}
else
{
if (sp_data == sp + ARM_OLD_RT_SIGFRAME_SIGINFO)
r0_offset = ARM_OLD_RT_SIGFRAME_UCONTEXT;
else
r0_offset = ARM_NEW_RT_SIGFRAME_UCONTEXT;
r0_offset += ARM_UCONTEXT_SIGCONTEXT + ARM_SIGCONTEXT_R0;
}
pc_offset = r0_offset + INT_REGISTER_SIZE * ARM_PC_REGNUM;
return pc_offset;
}
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