mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-26 11:47:31 +00:00
8ff21c23a5
While here, extract NARGREG as a definition. Reviewed by: br Differential Revision: https://reviews.freebsd.org/D9249
107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
/*-
|
|
* Copyright 2017 Li-Wen Hsu <lwhsu@FreeBSD.org>
|
|
*
|
|
* 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 <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/* FreeBSD/riscv64-specific system call handling. */
|
|
|
|
#include <sys/ptrace.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#include <machine/frame.h>
|
|
#include <machine/reg.h>
|
|
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
#include <sysdecode.h>
|
|
|
|
#include "truss.h"
|
|
|
|
static int
|
|
riscv64_fetch_args(struct trussinfo *trussinfo, u_int narg)
|
|
{
|
|
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)®s, 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.
|
|
*/
|
|
syscall_num = regs.t[0];
|
|
if (syscall_num == SYS_syscall || syscall_num == SYS___syscall) {
|
|
reg = 1;
|
|
syscall_num = regs.a[0];
|
|
} else {
|
|
reg = 0;
|
|
}
|
|
|
|
for (i = 0; i < narg && reg < NARGREG; i++, reg++)
|
|
cs->args[i] = regs.a[reg];
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
riscv64_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)®s, 0) < 0) {
|
|
fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
|
|
return (-1);
|
|
}
|
|
|
|
retval[0] = regs.a[0];
|
|
retval[1] = regs.a[1];
|
|
*errorp = !!(regs.t[0]);
|
|
return (0);
|
|
}
|
|
|
|
static struct procabi riscv64_freebsd = {
|
|
"FreeBSD ELF64",
|
|
SYSDECODE_ABI_FREEBSD,
|
|
riscv64_fetch_args,
|
|
riscv64_fetch_retval,
|
|
STAILQ_HEAD_INITIALIZER(riscv64_freebsd.extra_syscalls),
|
|
{ NULL }
|
|
};
|
|
|
|
PROCABI(riscv64_freebsd);
|