110 lines
3.8 KiB
C
110 lines
3.8 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2017,2018,2019,2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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* Copyright © 2019,2020 Danny Milosavljevic <dannym@scratchpost.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* 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 (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* 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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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <setjmp.h>
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#include <stdlib.h>
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#if !__TINYC__
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void
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__attribute__ ((noinline))
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longjmp (jmp_buf env, int val)
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{
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// *INDENT-OFF*
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asm (
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"mov r0, %0\n\t"
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"mov r1, %1\n\t"
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"cmp r1, #0\n\t"
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"moveq r1, #1\n\t" /* returning 0 is not allowed, even when the user wanted to. */
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"ldr r13, [r0], #4\n\t" /* stack pointer (sp) */
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"ldr r14, [r0], #4\n\t" /* link register (lr) */
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"ldmia r0!, {r4, r5, r6, r7, r8, r9, r10, r11}\n\t"
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// TODO: If using VFP, vldmia r0!, {d8-d15}
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"mov r0, r1\n\t"
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:
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: "r" (env), "r" (val));
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// *INDENT-ON*
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// not reached
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}
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#else //__TINYC__
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__asm__ (".global longjmp\n");
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__asm__ ("longjmp:\n");
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__asm__ (".int 0xe52db004\n"); //push {fp} ; (str fp, [sp, #-4]!)
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__asm__ (".int 0xe28db000\n"); //add fp, sp, #0
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__asm__ (".int 0xe24dd00c\n"); //sub sp, sp, #12
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__asm__ (".int 0xe50b0008\n"); //str r0, [fp, #-8]
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__asm__ (".int 0xe50b100c\n"); //str r1, [fp, #-12]
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__asm__ (".int 0xe51b3008\n"); //ldr r3, [fp, #-8]
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__asm__ (".int 0xe51b200c\n"); //ldr r2, [fp, #-12]
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__asm__ (".int 0xe1a00003\n"); //mov r0, r3
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__asm__ (".int 0xe1a01002\n"); //mov r1, r2
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__asm__ (".int 0xe3510000\n"); //cmp r1, #0
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__asm__ (".int 0x03a01001\n"); //moveq r1, #1
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__asm__ (".int 0xe490d004\n"); //ldr sp, [r0], #4
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__asm__ (".int 0xe490e004\n"); //ldr lr, [r0], #4
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__asm__ (".int 0xe8b00ff0\n"); //ldm r0!, {r4, r5, r6, r7, r8, r9, sl, fp}
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#if HAVE_FLOAT
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// TODO: If using VFP, vldmia r0!, {d8-d15}
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#endif
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__asm__ (".int 0xe1a00001\n"); //mov r0, r1
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__asm__ (".int 0xe12fff1e\n"); //bx lr
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#endif //__TINYC__
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#if !__TINYC__
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int
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__attribute__ ((noinline))
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setjmp (jmp_buf env)
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{
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// *INDENT-OFF*
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asm (
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"mov r0, %0\n\t"
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"str r13, [r0], #4\n\t" /* stack pointer (sp) */
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"str r14, [r0], #4\n\t" /* link register (lr) */
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"stmia r0!, {r4, r5, r6, r7, r8, r9, r10, r11}\n\t"
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// TODO: If using VFP, vstmia r0!, {d8-d15}
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:
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: "r" (env)
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: "r0");
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// *INDENT-ON*
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return 0;
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}
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#else //__TINYC__
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__asm__ (".global setjmp\n");
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__asm__ ("setjmp:\n");
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__asm__ (".int 0xe52db004\n"); //push {fp} ; (str fp, [sp, #-4]!)
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__asm__ (".int 0xe28db000\n"); //add fp, sp, #0
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__asm__ (".int 0xe24dd00c\n"); //sub sp, sp, #12
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__asm__ (".int 0xe50b0008\n"); //str r0, [fp, #-8]
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__asm__ (".int 0xe51b3008\n"); //ldr r3, [fp, #-8]
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__asm__ (".int 0xe1a00003\n"); //mov r0, r3
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__asm__ (".int 0xe480d004\n"); //str sp, [r0], #4
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__asm__ (".int 0xe480e004\n"); //str lr, [r0], #4
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__asm__ (".int 0xe28bd000\n"); //add sp, fp, #0
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__asm__ (".int 0xe49db004\n"); //pop {fp} ; (ldr fp, [sp], #4)
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__asm__ (".int 0xe8a00ff0\n"); //stmia r0!, {r4, r5, r6, r7, r8, r9, sl, fp}
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#if HAVE_FLOAT
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// TODO: If using VFP, vstmia r0!, {d8-d15}
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#endif
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__asm__ (".int 0xe1a0b00d\n"); //mov fp, sp
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__asm__ (".int 0xe3a03000\n"); //mov r3, #0
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__asm__ (".int 0xe1a00003\n"); //mov r0, r3
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__asm__ (".int 0xe12fff1e\n"); //bx lr
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#endif //__TINYC__
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