1/* Support functions for the unwinder. 2 Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. 3 Contributed by Paul Brook 4 5 This file is free software; you can redistribute it and/or modify it 6 under the terms of the GNU General Public License as published by the 7 Free Software Foundation; either version 2, or (at your option) any 8 later version. 9 10 In addition to the permissions in the GNU General Public License, the 11 Free Software Foundation gives you unlimited permission to link the 12 compiled version of this file into combinations with other programs, 13 and to distribute those combinations without any restriction coming 14 from the use of this file. (The General Public License restrictions 15 do apply in other respects; for example, they cover modification of 16 the file, and distribution when not linked into a combine 17 executable.) 18 19 This file is distributed in the hope that it will be useful, but 20 WITHOUT ANY WARRANTY; without even the implied warranty of 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 22 General Public License for more details. 23 24 You should have received a copy of the GNU General Public License 25 along with this program; see the file COPYING. If not, write to 26 the Free Software Foundation, 51 Franklin Street, Fifth Floor, 27 Boston, MA 02110-1301, USA. */ 28 29#include <machine/acle-compat.h> 30 31/* Allow the use of VFP instructions */ 32#if __ARM_ARCH >= 7 33.fpu vfp 34#endif 35 36#ifndef __symbian__ 37 38#include "lib1funcs.asm" 39 40.macro UNPREFIX name 41 .global SYM (\name) 42 EQUIV SYM (\name), SYM (__\name) 43.endm 44 45/* r0 points to a 16-word block. Upload these values to the actual core 46 state. */ 47ARM_FUNC_START restore_core_regs 48 /* We must use sp as the base register when restoring sp. Push the 49 last 3 registers onto the top of the current stack to achieve 50 this. */ 51 add r1, r0, #52 52 ldmia r1, {r3, r4, r5} /* {sp, lr, pc}. */ 53#ifdef __INTERWORKING__ 54 /* Restore pc into ip. */ 55 mov r2, r5 56 stmfd sp!, {r2, r3, r4} 57#else 58 stmfd sp!, {r3, r4, r5} 59#endif 60 /* Don't bother restoring ip. */ 61 ldmia r0, {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, sl, fp} 62 /* Pop the three registers we pushed earlier. */ 63#ifdef __INTERWORKING__ 64 ldmfd sp, {ip, sp, lr} 65 bx ip 66#else 67 ldmfd sp, {sp, lr, pc} 68#endif 69 FUNC_END restore_core_regs 70 UNPREFIX restore_core_regs 71 72/* Load VFP registers d0-d15 from the address in r0. */ 73ARM_FUNC_START gnu_Unwind_Restore_VFP 74 /* Use the generic coprocessor form so that gas doesn't complain 75 on soft-float targets. */ 76#if __ARM_ARCH >= 7 77 fldmiax r0, {d0-d15} 78#else 79 ldc p11,cr0,[r0],{0x21} /* fldmiax r0, {d0-d15} */ 80#endif 81 RET 82 83/* Store VFR regsters d0-d15 to the address in r0. */ 84ARM_FUNC_START gnu_Unwind_Save_VFP 85 /* Use the generic coprocessor form so that gas doesn't complain 86 on soft-float targets. */ 87#if __ARM_ARCH >= 7 88 fstmiax r0, {d0-d15} 89#else 90 stc p11,cr0,[r0],{0x21} /* fstmiax r0, {d0-d15} */ 91#endif 92 RET 93 94/* Wrappers to save core registers, then call the real routine. */ 95 96.macro UNWIND_WRAPPER name nargs 97 ARM_FUNC_START \name 98 /* Create a phase2_vrs structure. */ 99 /* Split reg push in two to ensure the correct value for sp. */ 100 stmfd sp!, {sp, lr, pc} 101 stmfd sp!, {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, sl, fp, ip} 102 103 /* Demand-save flags, plus an extra word for alignment. */ 104 mov r3, #0 105 stmfd sp!, {r2, r3} 106 107 /* Point r1 at the block. Pass r[0..nargs) unchanged. */ 108 add r\nargs, sp, #4 109#if defined(__thumb__) 110 /* Switch back to thumb mode to avoid interworking hassle. */ 111 adr ip, .L1_\name 112 orr ip, ip, #1 113 bx ip 114 .thumb 115.L1_\name: 116 bl SYM (__gnu\name) __PLT__ 117 ldr r3, [sp, #64] 118 add sp, #72 119 bx r3 120#else 121 bl SYM (__gnu\name) __PLT__ 122 ldr lr, [sp, #64] 123 add sp, sp, #72 124 RET 125#endif 126 FUNC_END \name 127 UNPREFIX \name 128.endm 129 130UNWIND_WRAPPER _Unwind_RaiseException 1 131UNWIND_WRAPPER _Unwind_Resume 1 132UNWIND_WRAPPER _Unwind_Resume_or_Rethrow 1 133UNWIND_WRAPPER _Unwind_ForcedUnwind 3 134UNWIND_WRAPPER _Unwind_Backtrace 2 135 136#endif /* ndef __symbian__ */ 137