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Make truss(8) work for 32-bit CloudABI executables on ARM64.

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This change effectively merges the existing 64-bit support for ARM64
with the 32-on-64-bit support for AMD64.
This commit is contained in:
ed 2017-12-20 13:13:10 +00:00
parent 065607f663
commit 58e7052bab
2 changed files with 113 additions and 0 deletions
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1
usr.bin/truss/Makefile
View File

@ -13,6 +13,7 @@ ABIS+= freebsd
# Each ABI is expected to have an ABI.c, MACHINE_ARCH-ABI.c or
# MACHINE_CPUARCH-ABI.c file that will be used to map the syscall arguments.
.if ${MACHINE_ARCH} == "aarch64"
ABIS+= cloudabi32
ABIS+= cloudabi64
.endif
.if ${MACHINE_CPUARCH} == "i386"

112
usr.bin/truss/aarch64-cloudabi32.c Normal file
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@ -0,0 +1,112 @@
/*-
* Copyright (c) 2015-2017 Nuxi, https://nuxi.nl/
*
* 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("$FreeBSD$");
#include <sys/param.h>
#include <sys/ptrace.h>
#include <machine/armreg.h>
#include <stdbool.h>
#include <stdio.h>
#include <sysdecode.h>
#include "truss.h"
static int
aarch64_cloudabi32_fetch_args(struct trussinfo *trussinfo, unsigned int narg)
{
struct current_syscall *cs;
struct ptrace_io_desc iorequest;
struct reg regs;
lwpid_t tid;
if (narg > 0) {
/* Fetch registers, containing the address of the arguments. */
tid = trussinfo->curthread->tid;
if (ptrace(PT_GETREGS, tid, (caddr_t)&regs, 0) == -1) {
fprintf(trussinfo->outfile,
"-- CANNOT READ REGISTERS --\n");
return (-1);
}
/* Fetch arguments. They are already padded to 64 bits. */
cs = &trussinfo->curthread->cs;
iorequest.piod_op = PIOD_READ_D;
iorequest.piod_offs = (void *)regs.x[2];
iorequest.piod_addr = cs->args;
iorequest.piod_len = sizeof(cs->args[0]) * narg;
if (ptrace(PT_IO, tid, (caddr_t)&iorequest, 0) == -1 ||
iorequest.piod_len == 0)
return (-1);
}
return (0);
}
static int
aarch64_cloudabi32_fetch_retval(struct trussinfo *trussinfo, long *retval,
int *errorp)
{
struct ptrace_io_desc iorequest;
struct reg regs;
lwpid_t tid;
/* Fetch registers, containing the address of the return values. */
tid = trussinfo->curthread->tid;
if (ptrace(PT_GETREGS, tid, (caddr_t)&regs, 0) == -1) {
fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
return (-1);
}
if ((regs.spsr & PSR_C) == 0) {
/* System call succeeded. Fetch return values. */
iorequest.piod_op = PIOD_READ_D;
iorequest.piod_offs = (void *)regs.x[2];
iorequest.piod_addr = retval;
iorequest.piod_len = sizeof(retval[0]) * 2;
if (ptrace(PT_IO, tid, (caddr_t)&iorequest, 0) == -1 ||
iorequest.piod_len == 0)
return (-1);
*errorp = 0;
} else {
/* System call failed. Set error. */
retval[0] = regs.x[0];
*errorp = 1;
}
return (0);
}
static struct procabi aarch64_cloudabi32 = {
"CloudABI ELF32",
SYSDECODE_ABI_CLOUDABI32,
aarch64_cloudabi32_fetch_args,
aarch64_cloudabi32_fetch_retval,
STAILQ_HEAD_INITIALIZER(aarch64_cloudabi32.extra_syscalls),
{ NULL }
};
PROCABI(aarch64_cloudabi32);