diff -r 000000000000 -r e4d67989cc36 genericopenlibs/cstdlib/LSIGNAL/JMP_MARM.CPP --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/genericopenlibs/cstdlib/LSIGNAL/JMP_MARM.CPP Tue Feb 02 02:01:42 2010 +0200 @@ -0,0 +1,71 @@ +// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). +// All rights reserved. +// This component and the accompanying materials are made available +// under the terms of "Eclipse Public License v1.0" +// which accompanies this distribution, and is available +// at the URL "http://www.eclipse.org/legal/epl-v10.html". +// +// Initial Contributors: +// Nokia Corporation - initial contribution. +// +// Contributors: +// +// Description: +// + +#include + +extern "C" { + +EXPORT_C int setjmp(jmp_buf __jmpb) + { +#ifdef __MARM_THUMB__ + //the function destroys the contents of {r0,r1,r2,r3} registers + //r0 is used to hold the retrun value + //r1,r2,r3 - they are used usually to hold functions arguments/temp data and are + //not expected to preserve their values between functions calls. + asm("stmia r0!, {r4-r7}");//bytes {0..15} are occupied by {r4,r5,r6,r7} registers + asm("mov r2, r8"); + asm("mov r3, r9"); + asm("mov r4, r10"); + asm("mov r5, r11"); + asm("mov r6, sp"); + asm("mov r7, lr"); + asm("stmia r0!, {r2-r7}");//bytes {16..39} are occupied by {r8,r9,r10,r11,sp,lr} registers + asm("sub r0, #40");//r0 points now to the beginning of __jmpb + asm("ldmia r0!, {r4-r7}");//restore the contents of {r4,r5,r6,r7} registers +#else + asm("stmia r0, {r4-r11, sp, lr} "); // Save the context +#endif + return(0); + } + +EXPORT_C void longjmp(jmp_buf __jmpb, int __retval) + { +#ifdef __MARM_THUMB__ + asm("mov r3, r0"); // save the jmp_buf pointer + asm("add r3, #16"); //add on 16 to get to high registers + asm("ldmia r3!, {r4-r7}"); + asm("mov r8,r4"); + asm("mov r9,r5"); + asm("mov r10,r6"); + asm("mov r11,r7"); + asm("ldmia r3!, {r4-r5}"); //get sp and lr + asm("mov sp, r4"); + asm("mov lr, r5"); + asm("mov r3, r0"); //get the jmp_buf ptr again + asm("ldmia r3!, {r4-r7}"); //and restore the lo regs + asm("mov r0, r1"); // return(__retval) + asm("cmp r0, #0"); + asm("bne 1f"); + asm("mov r0, #1"); + asm("1:"); +#else + asm("ldmia r0, {r4-r11, sp, lr} "); // Restore the context + asm("movs r0, r1"); // return(__retval == 0 ? 1 : retval) + asm("moveq r0, #1"); +#endif + return; + } + +} // extern "C"