diff options
Diffstat (limited to '8/platforms/android-8/arch-arm/usr/include/machine/setjmp.h')
| -rw-r--r-- | 8/platforms/android-8/arch-arm/usr/include/machine/setjmp.h | 139 |
1 files changed, 67 insertions, 72 deletions
diff --git a/8/platforms/android-8/arch-arm/usr/include/machine/setjmp.h b/8/platforms/android-8/arch-arm/usr/include/machine/setjmp.h index f20cab2..0941202 100644 --- a/8/platforms/android-8/arch-arm/usr/include/machine/setjmp.h +++ b/8/platforms/android-8/arch-arm/usr/include/machine/setjmp.h @@ -1,87 +1,82 @@ -/* $OpenBSD: setjmp.h,v 1.1 2004/02/01 05:09:49 drahn Exp $ */ -/* $NetBSD: setjmp.h,v 1.2 2001/08/25 14:45:59 bjh21 Exp $ */ +/* + * Copyright (C) 2010 The Android Open Source Project + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ /* * machine/setjmp.h: machine dependent setjmp-related information. */ -#ifdef __ELF__ -#define _JBLEN 64 /* size, in longs, of a jmp_buf */ -#else -#define _JBLEN 29 /* size, in longs, of a jmp_buf */ -#endif +/* _JBLEN is the size of a jmp_buf in longs. + * Do not modify this value or you will break the ABI ! + * + * This value comes from the original OpenBSD ARM-specific header + * that was replaced by this one. + */ +#define _JBLEN 64 -/* - * NOTE: The internal structure of a jmp_buf is *PRIVATE* - * This information is provided as there is software - * that fiddles with this with obtain the stack pointer - * (yes really ! and its commercial !). +/* According to the ARM AAPCS document, we only need to save + * the following registers: * - * Description of the setjmp buffer + * Core r4-r14 * - * word 0 magic number (dependant on creator) - * 1 - 3 f4 fp register 4 - * 4 - 6 f5 fp register 5 - * 7 - 9 f6 fp register 6 - * 10 - 12 f7 fp register 7 - * 13 fpsr fp status register - * 14 r4 register 4 - * 15 r5 register 5 - * 16 r6 register 6 - * 17 r7 register 7 - * 18 r8 register 8 - * 19 r9 register 9 - * 20 r10 register 10 (sl) - * 21 r11 register 11 (fp) - * 22 r12 register 12 (ip) - * 23 r13 register 13 (sp) - * 24 r14 register 14 (lr) - * 25 signal mask (dependant on magic) - * 26 (con't) - * 27 (con't) - * 28 (con't) + * VFP d8-d15 (see section 5.1.2.1) * - * The magic number number identifies the jmp_buf and - * how the buffer was created as well as providing - * a sanity check + * Registers s16-s31 (d8-d15, q4-q7) must be preserved across subroutine + * calls; registers s0-s15 (d0-d7, q0-q3) do not need to be preserved + * (and can be used for passing arguments or returning results in standard + * procedure-call variants). Registers d16-d31 (q8-q15), if present, do + * not need to be preserved. * - * A side note I should mention - Please do not tamper - * with the floating point fields. While they are - * always saved and restored at the moment this cannot - * be garenteed especially if the compiler happens - * to be generating soft-float code so no fp - * registers will be used. + * FPSCR saved because GLibc does saves it too. * - * Whilst this can be seen an encouraging people to - * use the setjmp buffer in this way I think that it - * is for the best then if changes occur compiles will - * break rather than just having new builds falling over - * mysteriously. */ -#define _JB_MAGIC__SETJMP 0x4278f500 -#define _JB_MAGIC_SETJMP 0x4278f501 - -/* Valid for all jmp_buf's */ - -#define _JB_MAGIC 0 -#define _JB_REG_F4 1 -#define _JB_REG_F5 4 -#define _JB_REG_F6 7 -#define _JB_REG_F7 10 -#define _JB_REG_FPSR 13 -#define _JB_REG_R4 14 -#define _JB_REG_R5 15 -#define _JB_REG_R6 16 -#define _JB_REG_R7 17 -#define _JB_REG_R8 18 -#define _JB_REG_R9 19 -#define _JB_REG_R10 20 -#define _JB_REG_R11 21 -#define _JB_REG_R12 22 -#define _JB_REG_R13 23 -#define _JB_REG_R14 24 +/* The internal structure of a jmp_buf is totally private. + * Current layout (may change in the future): + * + * word name description + * 0 magic magic number + * 1 sigmask signal mask (not used with _setjmp / _longjmp) + * 2 float_base base of float registers (d8 to d15) + * 18 float_state floating-point status and control register + * 19 core_base base of core registers (r4 to r14) + * 30 reserved reserved entries (room to grow) + * 64 + * + * NOTE: float_base must be at an even word index, since the + * FP registers will be loaded/stored with instructions + * that expect 8-byte alignment. + */ -/* Only valid with the _JB_MAGIC_SETJMP magic */ +#define _JB_MAGIC 0 +#define _JB_SIGMASK (_JB_MAGIC+1) +#define _JB_FLOAT_BASE (_JB_SIGMASK+1) +#define _JB_FLOAT_STATE (_JB_FLOAT_BASE + (15-8+1)*2) +#define _JB_CORE_BASE (_JB_FLOAT_STATE+1) -#define _JB_SIGMASK 25 +#define _JB_MAGIC__SETJMP 0x4278f500 +#define _JB_MAGIC_SETJMP 0x4278f501 |