mirror of
https://github.com/autc04/Retro68.git
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97 lines
3.8 KiB
ArmAsm
97 lines
3.8 KiB
ArmAsm
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/*******************************************************************************
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*
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* Copyright (c) 1993 Intel Corporation
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*
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* Intel hereby grants you permission to copy, modify, and distribute this
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* software and its documentation. Intel grants this permission provided
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* that the above copyright notice appears in all copies and that both the
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* copyright notice and this permission notice appear in supporting
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* documentation. In addition, Intel grants this permission provided that
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* you prominently mark as "not part of the original" any modifications
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* made to this software or documentation, and that the name of Intel
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* Corporation not be used in advertising or publicity pertaining to
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* distribution of the software or the documentation without specific,
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* written prior permission.
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*
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* Intel Corporation provides this AS IS, WITHOUT ANY WARRANTY, EXPRESS OR
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* IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY
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* OR FITNESS FOR A PARTICULAR PURPOSE. Intel makes no guarantee or
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* representations regarding the use of, or the results of the use of,
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* the software and documentation in terms of correctness, accuracy,
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* reliability, currentness, or otherwise; and you rely on the software,
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* documentation and results solely at your own risk.
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*
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* IN NO EVENT SHALL INTEL BE LIABLE FOR ANY LOSS OF USE, LOSS OF BUSINESS,
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* LOSS OF PROFITS, INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES
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* OF ANY KIND. IN NO EVENT SHALL INTEL'S TOTAL LIABILITY EXCEED THE SUM
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* PAID TO INTEL FOR THE PRODUCT LICENSED HEREUNDER.
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*
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******************************************************************************/
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/******************************************************************************/
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/* */
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/* setjmp(), longjmp() */
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/* */
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/******************************************************************************/
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.file "setjmp.as"
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.text
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/* .link_pix */
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.align 4
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.globl _setjmp
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_setjmp:
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flushreg
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andnot 0xf,pfp,g1 /* get pfp, mask out return status bits */
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st g1, 0x58(g0) /* save fp of caller*/
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/* save globals not killed by the calling convention */
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stq g8, 0x40(g0) /* save g8-g11*/
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st g12, 0x50(g0) /* save g12*/
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st g14, 0x54(g0) /* save g14*/
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/* save previous frame local registers */
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ldq (g1), g4 /* get previous frame pfp, sp, rip, r3 */
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stq g4, (g0) /* save pfp, sp, rip, r3 */
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ldq 0x10(g1), g4 /* get previous frame r4-r7 */
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stq g4, 0x10(g0) /* save r4-r7 */
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ldq 0x20(g1), g4 /* get previous frame r8-r11 */
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stq g4, 0x20(g0) /* save r8-r11 */
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ldq 0x30(g1), g4 /* get previous frame r12-r15 */
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stq g4, 0x30(g0) /* save r12-r15 */
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mov 0, g0 /* return 0 */
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ret
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/*
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* fake a return to the place that called the corresponding _setjmp
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*/
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.align 4
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.globl _longjmp
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_longjmp:
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call 0f /* ensure there is at least one stack frame */
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0:
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flushreg /* do this before swapping stack */
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ld 0x58(g0), pfp /* get fp of caller of setjmp */
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/* restore local registers
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* the following code modifies the frame of the function which originally
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* called setjmp.
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*/
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ldq (g0), g4 /* get pfp, sp, rip, r3 */
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stq g4, (pfp) /* restore pfp, sp, rip, r3 */
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ldq 0x10(g0), g4 /* get r4-r7 */
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stq g4, 0x10(pfp) /* restore r4-r7 */
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ldq 0x20(g0), g4 /* get r8-r11 */
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stq g4, 0x20(pfp) /* restore r8-r11 */
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ldq 0x30(g0), g4 /* get r12-r15 */
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stq g4, 0x30(pfp) /* restore r12-r15 */
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/* restore global registers */
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ldq 0x40(g0), g8 /* get old g8-g11 values */
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ld 0x50(g0), g12 /* get old g12 value */
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ld 0x54(g0), g14 /* get old g14 value */
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mov g1, g0 /* get return value */
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cmpo g0, 0 /* make sure it is not zero */
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bne 0f
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mov 1, g0 /* return 1 by default */
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0:
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ret /* return to caller of _setjmp */
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