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58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* Common target dependent code for GNU/Linux on ARM systems.
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Copyright (C) 1999-2016 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "common-defs.h"
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#include "arch/arm.h"
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#include "arm-linux.h"
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/* Calculate the offset from stack pointer of the pc register on the stack
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in the case of a sigreturn or sigreturn_rt syscall. */
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int
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arm_linux_sigreturn_next_pc_offset (unsigned long sp,
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unsigned long sp_data,
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unsigned long svc_number,
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int is_sigreturn)
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{
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/* Offset of R0 register. */
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int r0_offset = 0;
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/* Offset of PC register. */
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int pc_offset = 0;
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if (is_sigreturn)
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{
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if (sp_data == ARM_NEW_SIGFRAME_MAGIC)
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r0_offset = ARM_UCONTEXT_SIGCONTEXT + ARM_SIGCONTEXT_R0;
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else
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r0_offset = ARM_SIGCONTEXT_R0;
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}
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else
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{
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if (sp_data == sp + ARM_OLD_RT_SIGFRAME_SIGINFO)
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r0_offset = ARM_OLD_RT_SIGFRAME_UCONTEXT;
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else
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r0_offset = ARM_NEW_RT_SIGFRAME_UCONTEXT;
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r0_offset += ARM_UCONTEXT_SIGCONTEXT + ARM_SIGCONTEXT_R0;
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}
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pc_offset = r0_offset + INT_REGISTER_SIZE * ARM_PC_REGNUM;
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return pc_offset;
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}
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