| /* |
| * Copyright (C) 2026 Michael Brown <mbrown@fensystems.co.uk>. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of the |
| * License, or any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| * 02110-1301, USA. |
| * |
| * You can also choose to distribute this program under the terms of |
| * the Unmodified Binary Distribution Licence (as given in the file |
| * COPYING.UBDL), provided that you have satisfied its requirements. |
| */ |
| |
| FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ) |
| |
| /** @file |
| * |
| * Long jumps |
| * |
| */ |
| |
| .section ".note.GNU-stack", "", @progbits |
| .text |
| |
| /* |
| * Save stack context for non-local goto |
| */ |
| .section ".text.setjmp", "ax", @progbits |
| .globl setjmp |
| setjmp: |
| /* Save registers */ |
| stmg %r6, %r15, 0(%r2) |
| /* Return zero when returning as setjmp() */ |
| lghi %r2, 0 |
| br %r14 |
| .size setjmp, . - setjmp |
| |
| /* |
| * Non-local jump to a saved stack context |
| */ |
| .section ".text.longjmp", "ax", @progbits |
| .globl longjmp |
| longjmp: |
| /* Restore registers */ |
| lmg %r6, %r15, 0(%r2) |
| /* Force result to non-zero */ |
| ltgr %r2, %r3 |
| lochiz %r2, 1 |
| /* Return to setjmp() caller */ |
| br %r14 |
| .size longjmp, . - longjmp |
