/* $NetBSD: ptrace.S,v 1.2 2015/03/27 06:44:28 matt 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 "SYS.h" #if defined(LIBC_SCCS) && !defined(lint) RCSID("$NetBSD: ptrace.S,v 1.2 2015/03/27 06:44:28 matt Exp $") #endif /* LIBC_SCCS and not lint */ #define XCALLFRAME_SIZ (8*SZREG) #define XCALLFRAME_RA (0*SZREG) #define XCALLFRAME_A0 (1*SZREG) #define XCALLFRAME_A1 (2*SZREG) #define XCALLFRAME_A2 (3*SZREG) #define XCALLFRAME_A3 (4*SZREG) ENTRY(ptrace) #ifdef _REENTRANT addi sp, sp, -XCALLFRAME_SIZ REG_S ra, XCALLFRAME_RA(sp) REG_S a0, XCALLFRAME_A0(sp) REG_S a1, XCALLFRAME_A1(sp) REG_S a2, XCALLFRAME_A2(sp) REG_S a3, XCALLFRAME_A3(sp) call PLT(_C_LABEL(__errno)) INT_S zero, 0(a0) REG_L a3, XCALLFRAME_A3(sp) REG_L a2, XCALLFRAME_A2(sp) REG_L a1, XCALLFRAME_A1(sp) REG_L a0, XCALLFRAME_A0(sp) REG_L ra, XCALLFRAME_RA(sp) addi sp, sp, XCALLFRAME_SIZ #else auipc t0, %hi(_C_LABEL(errno)) INT_S zero, %lo(_C_LABEL(errno))(t0) #endif SYSTRAP(ptrace) JUMP_TO_CERROR() /* error */ ret /* success */ END(ptrace) |