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/* Support functions for the unwinder.

   Copyright (C) 2003, 2004, 2005  Free Software Foundation, Inc.

   Contributed by Paul Brook

   This file 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 2, or (at your option) any

   later version.

   In addition to the permissions in the GNU General Public License, the

   Free Software Foundation gives you unlimited permission to link the

   compiled version of this file into combinations with other programs,

   and to distribute those combinations without any restriction coming

   from the use of this file.  (The General Public License restrictions

   do apply in other respects; for example, they cover modification of

   the file, and distribution when not linked into a combine

   executable.)

   This file 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; see the file COPYING.  If not, write to

   the Free Software Foundation, 51 Franklin Street, Fifth Floor,

   Boston, MA 02110-1301, USA.  */

#ifndef __symbian__

#include "lib1funcs.asm"

.macro UNPREFIX name

        .global SYM (\name)

        EQUIV SYM (\name), SYM (__\name)

.endm

/* r0 points to a 16-word block.  Upload these values to the actual core

   state.  */

ARM_FUNC_START restore_core_regs

        /* We must use sp as the base register when restoring sp.  Push the

           last 3 registers onto the top of the current stack to achieve

           this.  */

        add r1, r0, #52

        ldmia r1, {r3, r4, r5}  /* {sp, lr, pc}.  */

#ifdef __INTERWORKING__

        /* Restore pc into ip.  */

        mov r2, r5

        stmfd sp!, {r2, r3, r4}

#else

        stmfd sp!, {r3, r4, r5}

#endif

        /* Don't bother restoring ip.  */

        ldmia r0, {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, sl, fp}

        /* Pop the three registers we pushed earlier.  */

#ifdef __INTERWORKING__

        ldmfd sp, {ip, sp, lr}

        bx ip

#else

        ldmfd sp, {sp, lr, pc}

#endif

        FUNC_END restore_core_regs

        UNPREFIX restore_core_regs

/* Load VFP registers d0-d15 from the address in r0.  */

ARM_FUNC_START gnu_Unwind_Restore_VFP

        /* Use the generic coprocessor form so that gas doesn't complain

           on soft-float targets.  */

        ldc   p11,cr0,[r0],{0x21} /* fldmiax r0, {d0-d15} */

        RET

/* Store VFR regsters d0-d15 to the address in r0.  */

ARM_FUNC_START gnu_Unwind_Save_VFP

        /* Use the generic coprocessor form so that gas doesn't complain

           on soft-float targets.  */

        stc   p11,cr0,[r0],{0x21} /* fstmiax r0, {d0-d15} */

        RET

/* Wrappers to save core registers, then call the real routine.   */

.macro  UNWIND_WRAPPER name nargs

        ARM_FUNC_START \name

        /* Create a phase2_vrs structure.  */

        /* Split reg push in two to ensure the correct value for sp.  */

        stmfd sp!, {sp, lr, pc}

        stmfd sp!, {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, sl, fp, ip}

        /* Demand-save flags, plus an extra word for alignment.  */

        mov r3, #0

        stmfd sp!, {r2, r3}

        /* Point r1 at the block.  Pass r[0..nargs) unchanged.  */

        add r\nargs, sp, #4

#if defined(__thumb__)

        /* Switch back to thumb mode to avoid interworking hassle.  */

        adr ip, .L1_\name

        orr ip, ip, #1

        bx ip

        .thumb

.L1_\name:

        bl SYM (__gnu\name) __PLT__

        ldr r3, [sp, #64]

        add sp, #72

        bx r3

#else

        bl SYM (__gnu\name) __PLT__

        ldr lr, [sp, #64]

        add sp, sp, #72

        RET

#endif

        FUNC_END \name

        UNPREFIX \name

.endm

UNWIND_WRAPPER _Unwind_RaiseException 1

UNWIND_WRAPPER _Unwind_Resume 1

UNWIND_WRAPPER _Unwind_Resume_or_Rethrow 1

UNWIND_WRAPPER _Unwind_ForcedUnwind 3

#endif  /* __symbian__ */