/* $NetBSD: setjmp.S,v 1.13 2000/03/05 05:41:53 shin Exp $ */ /*- * Copyright (c) 1991, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. */ #include #include #include #include #include #include #if defined(LIBC_SCCS) && !defined(lint) ASMSTR("from: @(#)setjmp.s 8.1 (Berkeley) 6/4/93") ASMSTR("$NetBSD: setjmp.S,v 1.13 2000/03/05 05:41:53 shin Exp $") #endif /* LIBC_SCCS and not lint */ #ifdef ABICALLS .abicalls #endif /* * C library -- setjmp, longjmp * * longjmp(a,v) * will generate a "return(v)" from * the last call to * setjmp(a) * by restoring registers from the stack, * and a struct sigcontext, see */ #define SETJMP_FRAME_SIZE (CALLFRAME_SIZ + 12) NON_LEAF(setjmp, SETJMP_FRAME_SIZE, ra) .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) #ifdef ABICALLS .set noreorder .cpload t9 .set reorder #endif subu sp, sp, SETJMP_FRAME_SIZE # allocate stack frame #ifdef ABICALLS .cprestore 16 #endif sw ra, CALLFRAME_RA(sp) # save state sw a0, SETJMP_FRAME_SIZE(sp) move a0, zero # get current signal mask jal _C_LABEL(sigblock) lw v1, SETJMP_FRAME_SIZE(sp) # v1 = jmpbuf sw v0, (1 * 4)(v1) # save sc_mask = sigblock(0) move a0, zero addu a1, sp, CALLFRAME_SIZ # pointer to struct sigaltstack jal _C_LABEL(__sigaltstack14) lw a0, SETJMP_FRAME_SIZE(sp) # restore jmpbuf lw v1, CALLFRAME_SIZ+8(sp) # get old ss_onstack and v1, v1, 1 # extract onstack flag sw v1, 0(a0) # save it in sc_onstack lw ra, CALLFRAME_RA(sp) addu sp, sp, SETJMP_FRAME_SIZE blt v0, zero, botch # check for sigstack() error REG_PROLOGUE REG_S ra, (2 * 4)(a0) # sc_pc = return address REG_LI v0, 0xACEDBADE # sigcontext magic number REG_S v0, (_OFFSETOF_SC_REGS + SZREG * ZERO)(a0) # saved in sc_regs[0] REG_S s0, (_OFFSETOF_SC_REGS + SZREG * S0)(a0) REG_S s1, (_OFFSETOF_SC_REGS + SZREG * S1)(a0) REG_S s2, (_OFFSETOF_SC_REGS + SZREG * S2)(a0) REG_S s3, (_OFFSETOF_SC_REGS + SZREG * S3)(a0) REG_S s4, (_OFFSETOF_SC_REGS + SZREG * S4)(a0) REG_S s5, (_OFFSETOF_SC_REGS + SZREG * S5)(a0) REG_S s6, (_OFFSETOF_SC_REGS + SZREG * S6)(a0) REG_S s7, (_OFFSETOF_SC_REGS + SZREG * S7)(a0) REG_S gp, (_OFFSETOF_SC_REGS + SZREG * GP)(a0) REG_S sp, (_OFFSETOF_SC_REGS + SZREG * SP)(a0) REG_S s8, (_OFFSETOF_SC_REGS + SZREG * S8)(a0) li v0, 1 # be nice if we could tell sw v0, (_OFFSETOF_SC_REGS + 34 * SZREG)(a0) # sc_fpused = 1 cfc1 v0, $31 swc1 $f20, (20 * 4 + _OFFSETOF_SC_FPREGS)(a0) swc1 $f21, (21 * 4 + _OFFSETOF_SC_FPREGS)(a0) swc1 $f22, (22 * 4 + _OFFSETOF_SC_FPREGS)(a0) swc1 $f23, (23 * 4 + _OFFSETOF_SC_FPREGS)(a0) swc1 $f24, (24 * 4 + _OFFSETOF_SC_FPREGS)(a0) swc1 $f25, (25 * 4 + _OFFSETOF_SC_FPREGS)(a0) swc1 $f26, (26 * 4 + _OFFSETOF_SC_FPREGS)(a0) swc1 $f27, (27 * 4 + _OFFSETOF_SC_FPREGS)(a0) swc1 $f28, (28 * 4 + _OFFSETOF_SC_FPREGS)(a0) swc1 $f29, (29 * 4 + _OFFSETOF_SC_FPREGS)(a0) swc1 $f30, (30 * 4 + _OFFSETOF_SC_FPREGS)(a0) swc1 $f31, (31 * 4 + _OFFSETOF_SC_FPREGS)(a0) sw v0, ((32 * 4) + _OFFSETOF_SC_FPREGS)(a0) REG_EPILOGUE move v0, zero j ra END(setjmp) LEAF(longjmp) #ifdef ABICALLS .set noreorder .cpload t9 .set reorder subu sp, sp, 32 .cprestore 16 #endif REG_PROLOGUE /* save return value in sc_regs[V0] */ REG_S a1, (_OFFSETOF_SC_REGS + V0 * SZREG)(a0) REG_EPILOGUE li v0, SYS_compat_13_sigreturn13 syscall botch: jal _C_LABEL(longjmperror) jal _C_LABEL(abort) END(longjmp)