[Midnightbsd-cvs] src [11272] trunk/usr.bin/truss/arm-fbsd.c: add arm

[laffer1 at midnightbsd.org]

Revision: 11272
          http://svnweb.midnightbsd.org/src/?rev=11272
Author:   laffer1
Date:     2018-07-03 20:01:45 -0400 (Tue, 03 Jul 2018)
Log Message:
-----------
add arm

Added Paths:
-----------
    trunk/usr.bin/truss/arm-fbsd.c

Added: trunk/usr.bin/truss/arm-fbsd.c
===================================================================
--- trunk/usr.bin/truss/arm-fbsd.c	                        (rev 0)
+++ trunk/usr.bin/truss/arm-fbsd.c	2018-07-04 00:01:45 UTC (rev 11272)
@@ -0,0 +1,139 @@
+/* $MidnightBSD$ */
+/*
+ * Copyright 1997 Sean Eric Fagan
+ *
+ * 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 Sean Eric Fagan
+ * 4. Neither the name of the author 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 <sys/cdefs.h>
+__FBSDID("$FreeBSD: stable/10/usr.bin/truss/arm-fbsd.c 290052 2015-10-27 17:00:04Z jhb $");
+
+/* FreeBSD/arm-specific system call handling. */
+
+#include <sys/ptrace.h>
+#include <sys/syscall.h>
+
+#include <machine/reg.h>
+#include <machine/armreg.h>
+#include <machine/ucontext.h>
+
+#include <stdio.h>
+
+#include "truss.h"
+
+#include "syscalls.h"
+
+static int
+arm_fetch_args(struct trussinfo *trussinfo, u_int narg)
+{
+	struct ptrace_io_desc iorequest;
+	struct reg regs;
+	struct current_syscall *cs;
+	lwpid_t tid;
+	u_int i, reg, syscall_num;
+
+	tid = trussinfo->curthread->tid;
+	cs = &trussinfo->curthread->cs;
+	if (ptrace(PT_GETREGS, tid, (caddr_t)&regs, 0) < 0) {
+		fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
+		return (-1);
+	}
+
+	/*
+	 * FreeBSD has two special kinds of system call redirections --
+	 * SYS_syscall, and SYS___syscall.  The former is the old syscall()
+	 * routine, basically; the latter is for quad-aligned arguments.
+	 *
+	 * The system call argument count and code from ptrace() already
+	 * account for these, but we need to skip over the first argument.
+	 */
+#ifdef __ARM_EABI__
+	syscall_num = regs.r[7];
+#else
+	if ((syscall_num = ptrace(PT_READ_I, tid,
+	    (caddr_t)(regs.r[_REG_PC] - INSN_SIZE), 0)) == -1) {
+		fprintf(trussinfo->outfile, "-- CANNOT READ PC --\n");
+		return (-1);
+	}
+	syscall_num = syscall_num & 0x000fffff;
+#endif
+
+	reg = 0;
+	switch (syscall_num) {
+	case SYS_syscall:
+		reg = 1;
+		break;
+	case SYS___syscall:
+		reg = 2;
+		break;
+	}
+
+	for (i = 0; i < narg && reg < 4; i++, reg++)
+		cs->args[i] = regs.r[reg];
+	if (narg > i) {
+		iorequest.piod_op = PIOD_READ_D;
+		iorequest.piod_offs = (void *)(regs.r_sp +
+		    4 * sizeof(uint32_t));
+		iorequest.piod_addr = &cs->args[i];
+		iorequest.piod_len = (narg - i) * sizeof(cs->args[0]);
+		ptrace(PT_IO, tid, (caddr_t)&iorequest, 0);
+		if (iorequest.piod_len == 0)
+			return (-1);
+	}
+
+	return (0);
+}
+
+static int
+arm_fetch_retval(struct trussinfo *trussinfo, long *retval, int *errorp)
+{
+	struct reg regs;
+	lwpid_t tid;
+
+	tid = trussinfo->curthread->tid;
+	if (ptrace(PT_GETREGS, tid, (caddr_t)&regs, 0) < 0) {
+		fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
+		return (-1);
+	}
+
+	/* XXX: Does not have the __ARMEB__ handling for __syscall(). */
+	retval[0] = regs.r[0];
+	retval[1] = regs.r[1];
+	*errorp = !!(regs.r_cpsr & PSR_C);
+	return (0);
+}
+
+static struct procabi arm_fbsd = {
+	"FreeBSD ELF32",
+	syscallnames,
+	nitems(syscallnames),
+	arm_fetch_args,
+	arm_fetch_retval
+};
+
+PROCABI(arm_fbsd);


Property changes on: trunk/usr.bin/truss/arm-fbsd.c
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