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Diffstat (limited to 'lib/libc/powerpc/gen/_ctx_start.S')
-rw-r--r-- | lib/libc/powerpc/gen/_ctx_start.S | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/libc/powerpc/gen/_ctx_start.S b/lib/libc/powerpc/gen/_ctx_start.S new file mode 100644 index 0000000..2d3cfcf --- /dev/null +++ b/lib/libc/powerpc/gen/_ctx_start.S @@ -0,0 +1,45 @@ +/* + * Copyright (c) 2004 Suleiman Souhlal + * 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. + * + * 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("$FreeBSD$"); + + .globl CNAME(_ctx_done) + .globl CNAME(abort) + + ENTRY(_ctx_start) + mtlr %r14 + blrl /* branch to start function */ + mr %r3,%r15 /* pass pointer to ucontext as argument */ + bl PIC_PLT(CNAME(_ctx_done)) /* branch to ctxt completion func */ + /* + * we should never return from the + * above branch. + */ + bl PIC_PLT(CNAME(abort)) /* abort */ + + .section .note.GNU-stack,"",%progbits |