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author | cognet <cognet@FreeBSD.org> | 2004-05-14 12:04:31 +0000 |
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committer | cognet <cognet@FreeBSD.org> | 2004-05-14 12:04:31 +0000 |
commit | bb6bbd6342ef3a05d837b89817ec6f058d1497b3 (patch) | |
tree | 6da949d33b96ce7f3985a2cbc32baeccf187c4d6 /lib/libc/arm/gen/setjmp.S | |
parent | 90f48ef1d2da8652d325e845334302aef9b6f5b9 (diff) | |
download | FreeBSD-src-bb6bbd6342ef3a05d837b89817ec6f058d1497b3.zip FreeBSD-src-bb6bbd6342ef3a05d837b89817ec6f058d1497b3.tar.gz |
Import the FreeBSD/arm libc bits.
Obtained from: NetBSD
Diffstat (limited to 'lib/libc/arm/gen/setjmp.S')
-rw-r--r-- | lib/libc/arm/gen/setjmp.S | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/lib/libc/arm/gen/setjmp.S b/lib/libc/arm/gen/setjmp.S new file mode 100644 index 0000000..be12412 --- /dev/null +++ b/lib/libc/arm/gen/setjmp.S @@ -0,0 +1,132 @@ +/* $NetBSD: setjmp.S,v 1.5 2003/04/05 23:08:51 bjh21 Exp $ */ + +/* + * Copyright (c) 1997 Mark Brinicombe + * All rights reserved. + * + * 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 Mark Brinicombe + * 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 AUTHOR 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 AUTHOR 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 <machine/asm.h> +__FBSDID("$FreeBSD$"); +/* + * 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. + * The previous signal state is restored. + */ + +#define SOFTFLOAT /* XXX */ +ENTRY(setjmp) + /* Block all signals and retrieve the old signal mask */ + stmfd sp!, {r0, r14} + mov r0, #0x00000000 + + bl PIC_SYM(_C_LABEL(sigblock), PLT) + mov r1, r0 + + ldmfd sp!, {r0, r14} + + /* Store signal mask */ + str r1, [r0, #(25 * 4)] + + ldr r1, .Lsetjmp_magic + str r1, [r0], #4 + +#ifdef SOFTFLOAT + add r0, r0, #52 +#else + /* Store fp registers */ + sfm f4, 4, [r0], #48 + /* Store fpsr */ + rfs r1 + str r1, [r0], #0x0004 +#endif /*SOFTFLOAT*/ + /* Store integer registers */ + stmia r0, {r4-r14} + mov r0, #0x00000000 + mov r15, r14 + +.Lsetjmp_magic: + .word _JB_MAGIC_SETJMP + + +.weak _C_LABEL(longjmp) +.set _C_LABEL(longjmp), _C_LABEL(__longjmp) +ENTRY(__longjmp) + ldr r2, .Lsetjmp_magic + ldr r3, [r0] + teq r2, r3 + bne botch + + /* Fetch signal mask */ + ldr r2, [r0, #(25 * 4)] + + /* Set signal mask */ + stmfd sp!, {r0, r1, r14} + sub sp, sp, #4 /* align the stack */ + + mov r0, r2 + bl PIC_SYM(_C_LABEL(sigsetmask), PLT) + + add sp, sp, #4 /* unalign the stack */ + ldmfd sp!, {r0, r1, r14} + + add r0, r0, #4 +#ifdef SOFTFLOAT + add r0, r0, #52 +#else + /* Restore fp registers */ + lfm f4, 4, [r0], #48 + /* Restore FPSR */ + ldr r4, [r0], #0x0004 + wfs r4 +#endif /* SOFTFLOAT */ + /* Restore integer registers */ + ldmia r0, {r4-r14} + + /* Validate sp and r14 */ + teq sp, #0 + teqne r14, #0 + beq botch + + /* Set return value */ + + mov r0, r1 + teq r0, #0x00000000 + moveq r0, #0x00000001 + mov r15, r14 + + /* validation failed, die die die. */ +botch: + bl PIC_SYM(_C_LABEL(longjmperror), PLT) + bl PIC_SYM(_C_LABEL(abort), PLT) + b . - 8 /* Cannot get here */ |