1178580Simp/* $NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui Exp $ */ 2178580Simp 3178580Simp/*- 4178580Simp * Copyright (c) 1991, 1993 5178580Simp * The Regents of the University of California. All rights reserved. 6178580Simp * 7178580Simp * This code is derived from software contributed to Berkeley by 8178580Simp * Ralph Campbell. 9178580Simp * 10178580Simp * Redistribution and use in source and binary forms, with or without 11178580Simp * modification, are permitted provided that the following conditions 12178580Simp * are met: 13178580Simp * 1. Redistributions of source code must retain the above copyright 14178580Simp * notice, this list of conditions and the following disclaimer. 15178580Simp * 2. Redistributions in binary form must reproduce the above copyright 16178580Simp * notice, this list of conditions and the following disclaimer in the 17178580Simp * documentation and/or other materials provided with the distribution. 18178580Simp * 3. Neither the name of the University nor the names of its contributors 19178580Simp * may be used to endorse or promote products derived from this software 20178580Simp * without specific prior written permission. 21178580Simp * 22178580Simp * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23178580Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24178580Simp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25178580Simp * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26178580Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27178580Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28178580Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29178580Simp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30178580Simp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31178580Simp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32178580Simp * SUCH DAMAGE. 33178580Simp */ 34178580Simp 35178580Simp#include <machine/asm.h> 36178580Simp__FBSDID("$FreeBSD: stable/11/lib/libc/mips/gen/setjmp.S 351792 2019-09-03 20:19:43Z kevans $"); 37178580Simp 38178580Simp#if defined(LIBC_SCCS) && !defined(lint) 39178580Simp ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93") 40178580Simp ASMSTR("$NetBSD: setjmp.S,v 1.17 2005/09/17 11:49:39 tsutsui Exp $") 41178580Simp#endif /* LIBC_SCCS and not lint */ 42178580Simp 43209231Sjchandra#include "SYS.h" 44209231Sjchandra 45178580Simp#ifdef __ABICALLS__ 46178580Simp .abicalls 47178580Simp#endif 48178580Simp 49178580Simp/* 50178580Simp * C library -- setjmp, longjmp 51178580Simp * 52178580Simp * longjmp(a,v) 53178580Simp * will generate a "return(v)" from 54178580Simp * the last call to 55178580Simp * setjmp(a) 56178580Simp * by restoring registers from the stack, 57178580Simp * and a struct sigcontext, see <signal.h> 58178580Simp */ 59178580Simp 60178580Simp#define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2)) 61178580Simp 62178580Simp 63178580SimpNESTED(setjmp, SETJMP_FRAME_SIZE, ra) 64178580Simp .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) 65209231Sjchandra SETUP_GP 66209231Sjchandra PTR_SUBU sp, sp, SETJMP_FRAME_SIZE # allocate stack frame 67209231Sjchandra SAVE_GP(CALLFRAME_GP) 68209231Sjchandra SETUP_GP64(CALLFRAME_GP, setjmp) 69178580Simp 70209231Sjchandra REG_S ra, CALLFRAME_RA(sp) # save RA 71209231Sjchandra REG_S a0, CALLFRAME_SIZ(sp) # store env 72209231Sjchandra 73178580Simp /* Get the signal mask. */ 74209231Sjchandra PTR_ADDU a2, a0, _JB_SIGMASK * SZREG # &oenv 75178580Simp li a0, 1 # SIG_SETBLOCK 76178580Simp move a1, zero # &env == 0 77209231Sjchandra PTR_LA t9, _C_LABEL(sigprocmask) # get current signal mask 78209231Sjchandra jalr t9 79178580Simp 80209231Sjchandra RESTORE_GP64 81209231Sjchandra REG_L a0, CALLFRAME_SIZ(sp) # restore env pointer 82209231Sjchandra REG_L ra, CALLFRAME_RA(sp) # restore RA 83209231Sjchandra PTR_ADDU sp, sp, SETJMP_FRAME_SIZE # pop stack frame 84178580Simp 85209231Sjchandra REG_LI v0, _JB_MAGIC_SETJMP 86209231Sjchandra REG_S v0, (_JB_MAGIC * SZREG)(a0) 87209231Sjchandra REG_S ra, (_JB_REG_RA * SZREG)(a0) 88274816Sbrooks /* 89274816Sbrooks * From "MIPSpro N32 ABI Handbook", Table 2-1: 90274816Sbrooks * Registers s0..s7 are callee-saved. 91274816Sbrooks * The sp register is callee-saved. 92274816Sbrooks * The fp (or s8) register is callee-saved. 93274816Sbrooks * The gp register is callee-saved (for n32/n64). 94274816Sbrooks */ 95209231Sjchandra REG_S s0, (_JB_REG_S0 * SZREG)(a0) 96209231Sjchandra REG_S s1, (_JB_REG_S1 * SZREG)(a0) 97209231Sjchandra REG_S s2, (_JB_REG_S2 * SZREG)(a0) 98209231Sjchandra REG_S s3, (_JB_REG_S3 * SZREG)(a0) 99209231Sjchandra REG_S s4, (_JB_REG_S4 * SZREG)(a0) 100209231Sjchandra REG_S s5, (_JB_REG_S5 * SZREG)(a0) 101209231Sjchandra REG_S s6, (_JB_REG_S6 * SZREG)(a0) 102209231Sjchandra REG_S s7, (_JB_REG_S7 * SZREG)(a0) 103209231Sjchandra REG_S sp, (_JB_REG_SP * SZREG)(a0) 104209231Sjchandra REG_S s8, (_JB_REG_S8 * SZREG)(a0) 105209231Sjchandra#if defined(__mips_n32) || defined(__mips_n64) 106209231Sjchandra REG_S gp, (_JB_REG_GP * SZREG)(a0) 107209231Sjchandra#endif 108274816Sbrooks#ifndef SOFTFLOAT 109274816Sbrooks /* 110274816Sbrooks * From "MIPSpro N32 ABI Handbook", Table 2-1: 111274816Sbrooks * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. 112274816Sbrooks * In N64, FP registers F24 .. F31 are callee-saved. 113274816Sbrooks * In O32, FP registers F20 .. F23 are callee-saved. 114274816Sbrooks */ 115274816Sbrooks cfc1 v0, $31 116274816Sbrooks INT_S v0, (_JB_FPREG_FCSR * SZREG)(a0) 117274816Sbrooks#if defined(__mips_o32) || defined(__mips_o64) || defined(__mips_n32) 118274816Sbrooks FP_S $f20, (_JB_FPREG_F20 * SZREG)(a0) 119274816Sbrooks FP_S $f22, (_JB_FPREG_F22 * SZREG)(a0) 120274816Sbrooks#endif 121274816Sbrooks#if defined(__mips_o32) || defined(__mips_o64) 122274816Sbrooks FP_S $f21, (_JB_FPREG_F21 * SZREG)(a0) 123274816Sbrooks FP_S $f23, (_JB_FPREG_F23 * SZREG)(a0) 124274816Sbrooks#endif 125274816Sbrooks#if defined(__mips_n32) || defined(__mips_n64) 126274816Sbrooks FP_S $f24, (_JB_FPREG_F24 * SZREG)(a0) 127274816Sbrooks FP_S $f26, (_JB_FPREG_F26 * SZREG)(a0) 128274816Sbrooks FP_S $f28, (_JB_FPREG_F28 * SZREG)(a0) 129274816Sbrooks FP_S $f30, (_JB_FPREG_F30 * SZREG)(a0) 130274816Sbrooks#endif 131274816Sbrooks#if defined(__mips_n64) 132274816Sbrooks FP_S $f25, (_JB_FPREG_F25 * SZREG)(a0) 133274816Sbrooks FP_S $f27, (_JB_FPREG_F27 * SZREG)(a0) 134274816Sbrooks FP_S $f29, (_JB_FPREG_F29 * SZREG)(a0) 135274816Sbrooks FP_S $f31, (_JB_FPREG_F31 * SZREG)(a0) 136274816Sbrooks#endif 137274816Sbrooks#endif /* ! SOFTFLOAT */ 138178580Simp 139178580Simp move v0, zero 140209231Sjchandra jr ra 141178580SimpEND(setjmp) 142178580Simp 143178580Simp#define LONGJMP_FRAME_SIZE (CALLFRAME_SIZ + (SZREG * 2)) 144178580Simp 145178580SimpNESTED(longjmp, LONGJMP_FRAME_SIZE, ra) 146178580Simp .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) 147209231Sjchandra PIC_PROLOGUE(longjmp) 148209231Sjchandra PTR_SUBU sp, sp, LONGJMP_FRAME_SIZE # allocate stack frame 149209231Sjchandra SAVE_GP(CALLFRAME_GP) 150209231Sjchandra 151209231Sjchandra REG_S ra, CALLFRAME_RA(sp) # save RA 152209231Sjchandra REG_L v0, (_JB_MAGIC * SZREG)(a0) 153209231Sjchandra REG_LI t0, _JB_MAGIC_SETJMP 154178580Simp bne v0, t0, botch # jump if error 155178580Simp nop 156178580Simp 157209231Sjchandra REG_S a0, CALLFRAME_SIZ(sp) # save env 158209231Sjchandra REG_S a1, (CALLFRAME_SIZ + SZREG)(sp) # save return value 159178580Simp 160178580Simp # set sigmask 161209231Sjchandra PTR_ADDU a1, a0, _JB_SIGMASK * SZREG # &set 162178580Simp move a2, zero # &oset == NULL 163178580Simp li a0, 3 # SIG_SETMASK 164209231Sjchandra PTR_LA t9,_C_LABEL(sigprocmask) # set current signal mask 165178580Simp jal t9 166178580Simp nop 167178580Simp 168209231Sjchandra REG_L a0, CALLFRAME_SIZ(sp) # restore env 169209231Sjchandra REG_L a1, (CALLFRAME_SIZ + SZREG)(sp) # restore return value 170178580Simp 171209231Sjchandra REG_L ra, (_JB_REG_RA * SZREG)(a0) 172274816Sbrooks /* 173274816Sbrooks * From "MIPSpro N32 ABI Handbook", Table 2-1: 174274816Sbrooks * Registers s0..s7 are callee-saved. 175274816Sbrooks * The sp register is callee-saved. 176274816Sbrooks * The fp (or s8) register is callee-saved. 177274816Sbrooks * The gp register is callee-saved (for n32/n64). 178274816Sbrooks */ 179209231Sjchandra REG_L s0, (_JB_REG_S0 * SZREG)(a0) 180209231Sjchandra REG_L s1, (_JB_REG_S1 * SZREG)(a0) 181209231Sjchandra REG_L s2, (_JB_REG_S2 * SZREG)(a0) 182209231Sjchandra REG_L s3, (_JB_REG_S3 * SZREG)(a0) 183209231Sjchandra REG_L s4, (_JB_REG_S4 * SZREG)(a0) 184209231Sjchandra REG_L s5, (_JB_REG_S5 * SZREG)(a0) 185209231Sjchandra REG_L s6, (_JB_REG_S6 * SZREG)(a0) 186209231Sjchandra REG_L s7, (_JB_REG_S7 * SZREG)(a0) 187209231Sjchandra REG_L sp, (_JB_REG_SP * SZREG)(a0) 188209231Sjchandra REG_L s8, (_JB_REG_S8 * SZREG)(a0) 189209231Sjchandra#if defined(__mips_n32) || defined(__mips_n64) 190209231Sjchandra REG_L gp, (_JB_REG_GP * SZREG)(a0) 191209231Sjchandra#endif 192274816Sbrooks#ifndef SOFTFLOAT 193274816Sbrooks /* 194274816Sbrooks * From "MIPSpro N32 ABI Handbook", Table 2-1: 195274816Sbrooks * In N32, FP registers F20, F22, F24, F26, F28, F30 are callee-saved. 196274816Sbrooks * In N64, FP registers F23 .. F31 are callee-saved. 197274816Sbrooks * In O32, FP registers F20 .. F23 are callee-saved. 198274816Sbrooks */ 199274816Sbrooks INT_L v0, (_JB_FPREG_FCSR * SZREG)(a0) 200274816Sbrooks ctc1 v0, $31 201274816Sbrooks#if defined(__mips_n64) || defined(__mips_n32) 202274816Sbrooks FP_L $f30, (_JB_FPREG_F30 * SZREG)(a0) 203274816Sbrooks FP_L $f28, (_JB_FPREG_F28 * SZREG)(a0) 204274816Sbrooks FP_L $f26, (_JB_FPREG_F26 * SZREG)(a0) 205274816Sbrooks FP_L $f24, (_JB_FPREG_F24 * SZREG)(a0) 206274816Sbrooks#endif 207274816Sbrooks#if defined(__mips_n32) || defined(__mips_o32) || defined(__mips_o64) 208274816Sbrooks FP_L $f22, (_JB_FPREG_F22 * SZREG)(a0) 209274816Sbrooks FP_L $f20, (_JB_FPREG_F20 * SZREG)(a0) 210274816Sbrooks#endif 211274816Sbrooks#if defined(__mips_o32) || defined(__mips_o64) 212274816Sbrooks FP_L $f21, (_JB_FPREG_F21 * SZREG)(a0) 213274816Sbrooks FP_L $f23, (_JB_FPREG_F23 * SZREG)(a0) 214274816Sbrooks#endif 215274816Sbrooks#if defined(__mips_n64) 216274816Sbrooks FP_L $f25, (_JB_FPREG_F25 * SZREG)(a0) 217274816Sbrooks FP_L $f27, (_JB_FPREG_F27 * SZREG)(a0) 218274816Sbrooks FP_L $f29, (_JB_FPREG_F29 * SZREG)(a0) 219274816Sbrooks FP_L $f31, (_JB_FPREG_F31 * SZREG)(a0) 220274816Sbrooks#endif 221274816Sbrooks#endif /* ! SOFTFLOAT */ 222209231Sjchandra 223178580Simp move v0, a1 224178580Simp j ra 225178580Simp nop 226178580Simp 227178580Simpbotch: 228209231Sjchandra /* 229209231Sjchandra * We know we aren't returning so we don't care about restoring 230209231Sjchandra * our caller's GP. 231209231Sjchandra */ 232209231Sjchandra PTR_LA t9, _C_LABEL(longjmperror) 233209231Sjchandra jalr t9 234178580Simp nop 235178580Simp 236209231Sjchandra PIC_TAILCALL(abort) 237178580SimpEND(longjmp) 238