aarch64-cloudabi64.c revision 311999 
1/*-
2 * Copyright (c) 2015 Nuxi, https://nuxi.nl/
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD: stable/11/usr.bin/truss/aarch64-cloudabi64.c 311999 2017-01-12 22:06:57Z jhb $");
28
29#include <sys/param.h>
30#include <sys/ptrace.h>
31
32#include <machine/armreg.h>
33
34#include <stdbool.h>
35#include <stdio.h>
36#include <sysdecode.h>
37
38#include "truss.h"
39
40static int
41aarch64_cloudabi64_fetch_args(struct trussinfo *trussinfo, unsigned int narg)
42{
43	struct current_syscall *cs;
44	struct reg regs;
45	lwpid_t tid;
46	unsigned int i;
47
48	tid = trussinfo->curthread->tid;
49	if (ptrace(PT_GETREGS, tid, (caddr_t)&regs, 0) == -1) {
50		fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
51		return (-1);
52	}
53
54	cs = &trussinfo->curthread->cs;
55	for (i = 0; i < narg && i < 8; i++)
56		cs->args[i] = regs.x[i];
57	return (0);
58}
59
60static int
61aarch64_cloudabi64_fetch_retval(struct trussinfo *trussinfo, long *retval,
62    int *errorp)
63{
64	struct reg regs;
65	lwpid_t tid;
66
67	tid = trussinfo->curthread->tid;
68	if (ptrace(PT_GETREGS, tid, (caddr_t)&regs, 0) == -1) {
69		fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
70		return (-1);
71	}
72
73	retval[0] = regs.x[0];
74	retval[1] = regs.x[1];
75	*errorp = (regs.spsr & PSR_C) != 0;
76	return (0);
77}
78
79static struct procabi aarch64_cloudabi64 = {
80	"CloudABI ELF64",
81	SYSDECODE_ABI_CLOUDABI64,
82	aarch64_cloudabi64_fetch_args,
83	aarch64_cloudabi64_fetch_retval
84};
85
86PROCABI(aarch64_cloudabi64);
87