diff options
Diffstat (limited to 'lib/libc/mips/sys/ptrace.S')
| -rw-r--r-- | lib/libc/mips/sys/ptrace.S | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/lib/libc/mips/sys/ptrace.S b/lib/libc/mips/sys/ptrace.S new file mode 100644 index 000000000000..8cf984a9c727 --- /dev/null +++ b/lib/libc/mips/sys/ptrace.S @@ -0,0 +1,71 @@ +/* $NetBSD: ptrace.S,v 1.9 2003/08/07 16:42:17 agc 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. 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 <machine/asm.h> +__FBSDID("$FreeBSD$"); +#include "SYS.h" + +#if defined(LIBC_SCCS) && !defined(lint) + ASMSTR("from: @(#)ptrace.s 8.1 (Berkeley) 6/4/93") + ASMSTR("$NetBSD: ptrace.S,v 1.9 2003/08/07 16:42:17 agc Exp $") +#endif /* LIBC_SCCS and not lint */ + +NESTED_NOPROFILE(ptrace, CALLFRAME_SIZ, ra) + .mask 0x80000000, (CALLFRAME_RA - CALLFRAME_SIZ) + SETUP_GP + PTR_SUBU sp, sp, CALLFRAME_SIZ + SETUP_GP64(CALLFRAME_GP, ptrace) + SAVE_GP(CALLFRAME_GP) + + PTR_S ra, CALLFRAME_RA(sp) + + PTR_LA t9, _C_LABEL(__error) # locate address of errno + jalr t9 + + PTR_L ra, CALLFRAME_RA(sp) + INT_S zero, 0(v0) # update errno value + + li v0, SYS_ptrace + syscall + + # Load __cerror's address using our gp, then restore it. + PTR_LA t9, __cerror + RESTORE_GP64 + PTR_ADDU sp, sp, CALLFRAME_SIZ + + bne a3, zero, 1f + + j ra +1: j t9 +END(ptrace) |