99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
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/*-
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* Copyright (c) 2015-2017 Nuxi, https://nuxi.nl/
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/ptrace.h>
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#include <machine/psl.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <sysdecode.h>
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#include "truss.h"
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static int
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i386_cloudabi32_fetch_args(struct trussinfo *trussinfo, unsigned int narg)
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{
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struct current_syscall *cs;
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struct ptrace_io_desc iorequest;
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struct reg regs;
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lwpid_t tid;
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if (narg > 0) {
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/* Fetch registers, containing the stack pointer. */
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tid = trussinfo->curthread->tid;
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if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) == -1) {
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fprintf(trussinfo->outfile,
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"-- CANNOT READ REGISTERS --\n");
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return (-1);
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}
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/* Fetch arguments. */
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cs = &trussinfo->curthread->cs;
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iorequest.piod_op = PIOD_READ_D;
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iorequest.piod_offs = (void **)regs.r_esp + 1;
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iorequest.piod_addr = cs->args;
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iorequest.piod_len = sizeof(cs->args[0]) * narg;
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if (ptrace(PT_IO, tid, (caddr_t)&iorequest, 0) == -1 ||
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iorequest.piod_len == 0)
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return (-1);
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}
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return (0);
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}
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static int
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i386_cloudabi32_fetch_retval(struct trussinfo *trussinfo, long *retval,
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int *errorp)
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{
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struct reg regs;
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lwpid_t tid;
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tid = trussinfo->curthread->tid;
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if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) == -1) {
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fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
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return (-1);
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}
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retval[0] = regs.r_eax;
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retval[1] = regs.r_edx;
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*errorp = (regs.r_eflags & PSL_C) != 0;
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return (0);
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}
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static struct procabi i386_cloudabi32 = {
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"CloudABI ELF32",
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SYSDECODE_ABI_CLOUDABI32,
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i386_cloudabi32_fetch_args,
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i386_cloudabi32_fetch_retval,
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STAILQ_HEAD_INITIALIZER(i386_cloudabi32.extra_syscalls),
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{ NULL }
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};
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PROCABI(i386_cloudabi32);
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