| |
| /*--------------------------------------------------------------------*/ |
| /*--- A minimal setjmp/longjmp implementation. m_libcsetjmp.c ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Valgrind, a dynamic binary instrumentation |
| framework. |
| |
| Copyright (C) 2010-2010 Mozilla Inc |
| |
| 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 (at your option) 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., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| /* Contributed by Julian Seward <jseward@acm.org> */ |
| |
| |
| #include "pub_core_basics.h" |
| #include "pub_core_libcsetjmp.h" /* self */ |
| |
| |
| /* See include/pub_tool_libcsetjmp.h for background and rationale. */ |
| |
| /* The only alternative implementations are for ppc{32,64}-linux. See |
| #259977. */ |
| |
| /* ------------ ppc32-linux ------------ */ |
| |
| #if defined(VGP_ppc32_linux) |
| |
| __asm__( |
| ".text" "\n" |
| "" "\n" |
| ".global VG_MINIMAL_SETJMP" "\n" // r3 = jmp_buf |
| "VG_MINIMAL_SETJMP:" "\n" |
| " stw 0, 0(3)" "\n" |
| " stw 1, 4(3)" "\n" |
| " stw 2, 8(3)" "\n" |
| " stw 3, 12(3)" "\n" |
| " stw 4, 16(3)" "\n" |
| " stw 5, 20(3)" "\n" |
| " stw 6, 24(3)" "\n" |
| " stw 7, 28(3)" "\n" |
| " stw 8, 32(3)" "\n" |
| " stw 9, 36(3)" "\n" |
| " stw 10, 40(3)" "\n" |
| " stw 11, 44(3)" "\n" |
| " stw 12, 48(3)" "\n" |
| " stw 13, 52(3)" "\n" |
| " stw 14, 56(3)" "\n" |
| " stw 15, 60(3)" "\n" |
| " stw 16, 64(3)" "\n" |
| " stw 17, 68(3)" "\n" |
| " stw 18, 72(3)" "\n" |
| " stw 19, 76(3)" "\n" |
| " stw 20, 80(3)" "\n" |
| " stw 21, 84(3)" "\n" |
| " stw 22, 88(3)" "\n" |
| " stw 23, 92(3)" "\n" |
| " stw 24, 96(3)" "\n" |
| " stw 25, 100(3)" "\n" |
| " stw 26, 104(3)" "\n" |
| " stw 27, 108(3)" "\n" |
| " stw 28, 112(3)" "\n" |
| " stw 29, 116(3)" "\n" |
| " stw 30, 120(3)" "\n" |
| " stw 31, 124(3)" "\n" |
| // must use a caller-save register here as scratch, hence r4 |
| " mflr 4" "\n" |
| " stw 4, 128(3)" "\n" |
| " mfcr 4" "\n" |
| " stw 4, 132(3)" "\n" |
| " li 3, 0" "\n" |
| " blr" "\n" |
| "" "\n" |
| |
| |
| ".global VG_MINIMAL_LONGJMP" "\n" |
| "VG_MINIMAL_LONGJMP:" "\n" // r3 = jmp_buf |
| // do r4 = 1 |
| // and park it in the restore slot for r3 (the ret reg) |
| " li 4, 1" "\n" |
| " stw 4, 12(3)" "\n" |
| // restore everything except r3 |
| // then r3 last of all |
| // then blr |
| " lwz 0, 128(3)" "\n" |
| " mtlr 0" "\n" |
| " lwz 0, 132(3)" "\n" |
| " mtcr 0" "\n" |
| " lwz 0, 0(3)" "\n" |
| " lwz 1, 4(3)" "\n" |
| " lwz 2, 8(3)" "\n" |
| // r3 is done at the end |
| " lwz 4, 16(3)" "\n" |
| " lwz 5, 20(3)" "\n" |
| " lwz 6, 24(3)" "\n" |
| " lwz 7, 28(3)" "\n" |
| " lwz 8, 32(3)" "\n" |
| " lwz 9, 36(3)" "\n" |
| " lwz 10, 40(3)" "\n" |
| " lwz 11, 44(3)" "\n" |
| " lwz 12, 48(3)" "\n" |
| " lwz 13, 52(3)" "\n" |
| " lwz 14, 56(3)" "\n" |
| " lwz 15, 60(3)" "\n" |
| " lwz 16, 64(3)" "\n" |
| " lwz 17, 68(3)" "\n" |
| " lwz 18, 72(3)" "\n" |
| " lwz 19, 76(3)" "\n" |
| " lwz 20, 80(3)" "\n" |
| " lwz 21, 84(3)" "\n" |
| " lwz 22, 88(3)" "\n" |
| " lwz 23, 92(3)" "\n" |
| " lwz 24, 96(3)" "\n" |
| " lwz 25, 100(3)" "\n" |
| " lwz 26, 104(3)" "\n" |
| " lwz 27, 108(3)" "\n" |
| " lwz 28, 112(3)" "\n" |
| " lwz 29, 116(3)" "\n" |
| " lwz 30, 120(3)" "\n" |
| " lwz 31, 124(3)" "\n" |
| " lwz 3, 12(3)" "\n" |
| " blr" "\n" |
| "" "\n" |
| |
| ".previous" "\n" |
| ); |
| |
| #endif /* VGP_ppc32_linux */ |
| |
| |
| /* ------------ ppc64-linux ------------ */ |
| |
| #if defined(VGP_ppc64_linux) |
| |
| __asm__( |
| ".section \".toc\",\"aw\"" "\n" |
| |
| ".section \".text\"" "\n" |
| ".align 2" "\n" |
| ".p2align 4,,15" "\n" |
| ".globl VG_MINIMAL_SETJMP" "\n" |
| |
| ".section \".opd\",\"aw\"" "\n" |
| ".align 3" "\n" |
| "VG_MINIMAL_SETJMP:" "\n" |
| ".quad .L.VG_MINIMAL_SETJMP,.TOC.@tocbase,0" "\n" |
| ".previous" "\n" |
| |
| ".type VG_MINIMAL_SETJMP, @function" "\n" |
| ".L.VG_MINIMAL_SETJMP:" "\n" |
| " std 0, 0(3)" "\n" |
| " std 1, 8(3)" "\n" |
| " std 2, 16(3)" "\n" |
| " std 3, 24(3)" "\n" |
| " std 4, 32(3)" "\n" |
| " std 5, 40(3)" "\n" |
| " std 6, 48(3)" "\n" |
| " std 7, 56(3)" "\n" |
| " std 8, 64(3)" "\n" |
| " std 9, 72(3)" "\n" |
| " std 10, 80(3)" "\n" |
| " std 11, 88(3)" "\n" |
| " std 12, 96(3)" "\n" |
| " std 13, 104(3)" "\n" |
| " std 14, 112(3)" "\n" |
| " std 15, 120(3)" "\n" |
| " std 16, 128(3)" "\n" |
| " std 17, 136(3)" "\n" |
| " std 18, 144(3)" "\n" |
| " std 19, 152(3)" "\n" |
| " std 20, 160(3)" "\n" |
| " std 21, 168(3)" "\n" |
| " std 22, 176(3)" "\n" |
| " std 23, 184(3)" "\n" |
| " std 24, 192(3)" "\n" |
| " std 25, 200(3)" "\n" |
| " std 26, 208(3)" "\n" |
| " std 27, 216(3)" "\n" |
| " std 28, 224(3)" "\n" |
| " std 29, 232(3)" "\n" |
| " std 30, 240(3)" "\n" |
| " std 31, 248(3)" "\n" |
| // must use a caller-save register here as scratch, hence r4 |
| " mflr 4" "\n" |
| " std 4, 256(3)" "\n" |
| " mfcr 4" "\n" |
| " std 4, 264(3)" "\n" |
| " li 3, 0" "\n" |
| " blr" "\n" |
| "" "\n" |
| |
| |
| ".globl VG_MINIMAL_LONGJMP" "\n" |
| |
| ".section \".opd\",\"aw\"" "\n" |
| ".align 3" "\n" |
| "VG_MINIMAL_LONGJMP:" "\n" |
| ".quad .L.VG_MINIMAL_LONGJMP,.TOC.@tocbase,0" "\n" |
| ".previous" "\n" |
| |
| ".type VG_MINIMAL_LONGJMP, @function" "\n" |
| ".L.VG_MINIMAL_LONGJMP:" "\n" |
| // do r4 = 1 |
| // and park it in the restore slot for r3 (the ret reg) |
| " li 4, 1" "\n" |
| " std 4, 24(3)" "\n" |
| // restore everything except r3 |
| // then r3 last of all |
| // then blr |
| " ld 0, 256(3)" "\n" |
| " mtlr 0" "\n" |
| " ld 0, 264(3)" "\n" |
| " mtcr 0" "\n" |
| " ld 0, 0(3)" "\n" |
| " ld 1, 8(3)" "\n" |
| " ld 2, 16(3)" "\n" |
| // r3 is done at the end |
| " ld 4, 32(3)" "\n" |
| " ld 5, 40(3)" "\n" |
| " ld 6, 48(3)" "\n" |
| " ld 7, 56(3)" "\n" |
| " ld 8, 64(3)" "\n" |
| " ld 9, 72(3)" "\n" |
| " ld 10, 80(3)" "\n" |
| " ld 11, 88(3)" "\n" |
| " ld 12, 96(3)" "\n" |
| " ld 13, 104(3)" "\n" |
| " ld 14, 112(3)" "\n" |
| " ld 15, 120(3)" "\n" |
| " ld 16, 128(3)" "\n" |
| " ld 17, 136(3)" "\n" |
| " ld 18, 144(3)" "\n" |
| " ld 19, 152(3)" "\n" |
| " ld 20, 160(3)" "\n" |
| " ld 21, 168(3)" "\n" |
| " ld 22, 176(3)" "\n" |
| " ld 23, 184(3)" "\n" |
| " ld 24, 192(3)" "\n" |
| " ld 25, 200(3)" "\n" |
| " ld 26, 208(3)" "\n" |
| " ld 27, 216(3)" "\n" |
| " ld 28, 224(3)" "\n" |
| " ld 29, 232(3)" "\n" |
| " ld 30, 240(3)" "\n" |
| " ld 31, 248(3)" "\n" |
| " ld 3, 24(3)" "\n" |
| " blr" "\n" |
| "" "\n" |
| |
| ".previous" "\n" |
| ".previous" "\n" |
| ); |
| |
| |
| #endif /* VGP_ppc64_linux */ |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end ---*/ |
| /*--------------------------------------------------------------------*/ |
