31489a9a26
For setjmp() and longjmp(), put the signal mask where it's supposed to be, instead of in the space reserved for fp regs.
130 lines
3.5 KiB
ArmAsm
130 lines
3.5 KiB
ArmAsm
/* $NetBSD: setjmp.S,v 1.5 2003/04/05 23:08:51 bjh21 Exp $ */
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/*
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* Copyright (c) 1997 Mark Brinicombe
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Mark Brinicombe
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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/*
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* C library -- setjmp, longjmp
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*
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* longjmp(a,v)
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* will generate a "return(v)" from the last call to
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* setjmp(a)
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* by restoring registers from the stack.
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* The previous signal state is restored.
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*/
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ENTRY(setjmp)
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/* Block all signals and retrieve the old signal mask */
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stmfd sp!, {r0, r14}
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add r2, r0, #(25 * 4) /* oset */
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mov r0, #0x00000001 /* SIG_BLOCK */
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mov r1, #0 /* set */
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bl PIC_SYM(_C_LABEL(sigprocmask), PLT)
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ldmfd sp!, {r0, r14}
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ldr r1, .Lsetjmp_magic
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str r1, [r0], #4
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#ifdef SOFTFLOAT
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add r0, r0, #52
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#else
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/* Store fp registers */
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sfm f4, 4, [r0], #48
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/* Store fpsr */
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rfs r1
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str r1, [r0], #0x0004
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#endif /*SOFTFLOAT*/
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/* Store integer registers */
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stmia r0, {r4-r14}
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mov r0, #0x00000000
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RET
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.Lsetjmp_magic:
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.word _JB_MAGIC_SETJMP
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.weak _C_LABEL(longjmp)
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.set _C_LABEL(longjmp), _C_LABEL(__longjmp)
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ENTRY(__longjmp)
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ldr r2, .Lsetjmp_magic
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ldr r3, [r0]
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teq r2, r3
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bne botch
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/* Set signal mask */
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stmfd sp!, {r0, r1, r14}
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sub sp, sp, #4 /* align the stack */
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add r1, r0, #(25 * 4) /* Signal mask */
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mov r0, #3 /* SIG_SETMASK */
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mov r2, #0
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bl PIC_SYM(_C_LABEL(sigprocmask), PLT)
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add sp, sp, #4 /* unalign the stack */
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ldmfd sp!, {r0, r1, r14}
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add r0, r0, #4
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#ifdef SOFTFLOAT
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add r0, r0, #52
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#else
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/* Restore fp registers */
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lfm f4, 4, [r0], #48
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/* Restore FPSR */
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ldr r4, [r0], #0x0004
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wfs r4
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#endif /* SOFTFLOAT */
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/* Restore integer registers */
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ldmia r0, {r4-r14}
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/* Validate sp and r14 */
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teq sp, #0
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teqne r14, #0
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beq botch
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/* Set return value */
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mov r0, r1
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teq r0, #0x00000000
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moveq r0, #0x00000001
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RET
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/* validation failed, die die die. */
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botch:
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bl PIC_SYM(_C_LABEL(longjmperror), PLT)
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bl PIC_SYM(_C_LABEL(abort), PLT)
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b . - 8 /* Cannot get here */
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