diff options
Diffstat (limited to 'libc/sysdeps/linux/i960/setjmp.S')
| -rw-r--r-- | libc/sysdeps/linux/i960/setjmp.S | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/i960/setjmp.S b/libc/sysdeps/linux/i960/setjmp.S new file mode 100644 index 000000000..2133ef557 --- /dev/null +++ b/libc/sysdeps/linux/i960/setjmp.S @@ -0,0 +1,124 @@ +/******************************************************************************* + * + * Copyright (c) 1993 Intel Corporation + * + * Intel hereby grants you permission to copy, modify, and distribute this + * software and its documentation. Intel grants this permission provided + * that the above copyright notice appears in all copies and that both the + * copyright notice and this permission notice appear in supporting + * documentation. In addition, Intel grants this permission provided that + * you prominently mark as "not part of the original" any modifications + * made to this software or documentation, and that the name of Intel + * Corporation not be used in advertising or publicity pertaining to + * distribution of the software or the documentation without specific, + * written prior permission. + * + * Intel Corporation provides this AS IS, WITHOUT ANY WARRANTY, EXPRESS OR + * IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY + * OR FITNESS FOR A PARTICULAR PURPOSE. Intel makes no guarantee or + * representations regarding the use of, or the results of the use of, + * the software and documentation in terms of correctness, accuracy, + * reliability, currentness, or otherwise; and you rely on the software, + * documentation and results solely at your own risk. + * + * IN NO EVENT SHALL INTEL BE LIABLE FOR ANY LOSS OF USE, LOSS OF BUSINESS, + * LOSS OF PROFITS, INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES + * OF ANY KIND. IN NO EVENT SHALL INTEL'S TOTAL LIABILITY EXCEED THE SUM + * PAID TO INTEL FOR THE PRODUCT LICENSED HEREUNDER. + * + ******************************************************************************/ + +/*************************************************************************** + * + * Modified from the original in order to fit with + * uClibc's setjmp, _setjmp, __sigsetjmp and ___sigjmp_save. + * + * + * int setjmp (jmp_buf __env) is the BSD style setjmp function. + * It simply calls __sigsetjmp(env, 1) + * + * int _setjmp (jmp_buf __env) is the posix style setjmp function. + * It simply calls __sigsetjmp(env, 0) + * This is the one normally used. + * + ***************************************************************************/ + + .text + .align 4 + .globl _setjmp + .globl __setjmp + +_setjmp: + mov 1, g1 /* __sigsetjmp(env, 1) */ + bx __sigsetjmp + +__setjmp: + mov 0, g1 /* __sigsetjmp(env, 0) */ + bx __sigsetjmp + + +/******************************************************************************/ +/* */ +/* setjmp(), longjmp() */ +/* */ +/******************************************************************************/ + .file "setjmp.S" + .text + /* .link_pix */ + + .align 4 + .globl __sigsetjmp +__sigsetjmp: + flushreg + andnot 0xf,pfp,g2 /* get pfp, mask out return status bits */ + st g2, 0x58(g0) /* save fp of caller*/ + /* save globals not killed by the calling convention */ + stq g8, 0x40(g0) /* save g8-g11*/ + st g12, 0x50(g0) /* save g12*/ + st g14, 0x54(g0) /* save g14*/ + /* save previous frame local registers */ + ldq (g2), g4 /* get previous frame pfp, sp, rip, r3 */ + stq g4, (g0) /* save pfp, sp, rip, r3 */ + ldq 0x10(g2), g4 /* get previous frame r4-r7 */ + stq g4, 0x10(g0) /* save r4-r7 */ + ldq 0x20(g2), g4 /* get previous frame r8-r11 */ + stq g4, 0x20(g0) /* save r8-r11 */ + ldq 0x30(g2), g4 /* get previous frame r12-r15 */ + stq g4, 0x30(g0) /* save r12-r15 */ + + bx ___sigjmp_save + + /* + * fake a return to the place that called the corresponding __sigsetjmp + */ + .align 4 + .globl ___longjmp +___longjmp: + call 0f /* ensure there is at least one stack frame */ + +0: + flushreg /* do this before swapping stack */ + ld 0x58(g0), pfp /* get fp of caller of setjmp */ + /* restore local registers + * the following code modifies the frame of the function which originally + * called setjmp. + */ + ldq (g0), g4 /* get pfp, sp, rip, r3 */ + stq g4, (pfp) /* restore pfp, sp, rip, r3 */ + ldq 0x10(g0), g4 /* get r4-r7 */ + stq g4, 0x10(pfp) /* restore r4-r7 */ + ldq 0x20(g0), g4 /* get r8-r11 */ + stq g4, 0x20(pfp) /* restore r8-r11 */ + ldq 0x30(g0), g4 /* get r12-r15 */ + stq g4, 0x30(pfp) /* restore r12-r15 */ + /* restore global registers */ + ldq 0x40(g0), g8 /* get old g8-g11 values */ + ld 0x50(g0), g12 /* get old g12 value */ + ld 0x54(g0), g14 /* get old g14 value */ + + mov g1, g0 /* get return value */ + cmpo g0, 0 /* make sure it is not zero */ + bne 0f + mov 1, g0 /* return 1 by default */ +0: + ret /* return to caller of __sigsetjmp */ |