8c444cbc45
This is to make the Makefile more easily extendable for new ABIs.
This also makes several other subtle changes:
- The build now is given a list of ABIs to use based on the MACHINE_ARCH or
MACHINE_CPUARCH. These ABIs have a related path in sys/ that is used
to generate their syscalls. For each ABI to build check for a
ABI.c, MACHINE_ARCH-ABI.c, or a MACHINE_CPUARCH-ABI.c. This matches
the old behavior needed for archs such as powerpc* and mips*.
- The ABI source file selection allows for simpler assignment of common
ABIs such as "fbsd32" from sys/compat/freebsd32, or cloudabi64.
- Expand 'fbsd' to 'freebsd' everywhere for consistency.
- Split out the powerpc-fbsd.c file into a powerpc64-freebsd32.c to be more
like the amd64-freebsd32.c file and to more easily allow the auto-generation
of ABI handling to work.
- Rename 'syscalls.h' to 'fbsd_syscalls.h' to lessen the ambiguity and
avoid confusion with syscall.h (such as in r288997).
- For non-native syscall header files, they are now renamed to be
ABI_syscalls.h, where ABI is what ABI the Makefile is building.
- Remove all of the makesyscalls config files. The "native" one being
name i386.conf was a long outstanding bug. They were all the same
except for the data they generated, so now it is just auto-generated
as a build artifact.
- The syscalls array is now fixed to be static in the syscalls header to
remove the compiler warning about non-extern. This was worked around
in the aarch64-fbsd.c file but not the others.
- All syscall table names are now just 'syscallnames' since they don't
need to be different as they are all static in their own ABI files. The
alternative is to name them ABI_syscallnames which does not seem
necessary.
Reviewed by: ed, jhb
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D3851
132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
/*
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* Copyright 1997 Sean Eric Fagan
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Sean Eric Fagan
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* 4. Neither the name of the author may be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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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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/* FreeBSD/amd64-specific system call handling. */
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#include <sys/ptrace.h>
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#include <sys/syscall.h>
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#include <machine/reg.h>
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#include <machine/psl.h>
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#include <stdio.h>
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#include "truss.h"
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#include "freebsd_syscalls.h"
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static int
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amd64_fetch_args(struct trussinfo *trussinfo, u_int narg)
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{
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struct ptrace_io_desc iorequest;
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struct reg regs;
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struct current_syscall *cs;
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lwpid_t tid;
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u_int i, reg;
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tid = trussinfo->curthread->tid;
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cs = &trussinfo->curthread->cs;
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if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
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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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/*
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* FreeBSD has two special kinds of system call redirections --
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* SYS_syscall, and SYS___syscall. The former is the old syscall()
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* routine, basically; the latter is for quad-aligned arguments.
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*
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* The system call argument count and code from ptrace() already
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* account for these, but we need to skip over %rax if it contains
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* either of these values.
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*/
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reg = 0;
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switch (regs.r_rax) {
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case SYS_syscall:
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case SYS___syscall:
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reg++;
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break;
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}
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for (i = 0; i < narg && reg < 6; i++, reg++) {
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switch (reg) {
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case 0: cs->args[i] = regs.r_rdi; break;
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case 1: cs->args[i] = regs.r_rsi; break;
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case 2: cs->args[i] = regs.r_rdx; break;
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case 3: cs->args[i] = regs.r_rcx; break;
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case 4: cs->args[i] = regs.r_r8; break;
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case 5: cs->args[i] = regs.r_r9; break;
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}
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}
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if (narg > i) {
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iorequest.piod_op = PIOD_READ_D;
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iorequest.piod_offs = (void *)(regs.r_rsp + sizeof(register_t));
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iorequest.piod_addr = &cs->args[i];
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iorequest.piod_len = (narg - i) * sizeof(register_t);
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ptrace(PT_IO, tid, (caddr_t)&iorequest, 0);
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if (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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amd64_fetch_retval(struct trussinfo *trussinfo, long *retval, 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) < 0) {
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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_rax;
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retval[1] = regs.r_rdx;
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*errorp = !!(regs.r_rflags & PSL_C);
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return (0);
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}
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static struct procabi amd64_freebsd = {
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"FreeBSD ELF64",
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syscallnames,
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nitems(syscallnames),
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amd64_fetch_args,
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amd64_fetch_retval
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};
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PROCABI(amd64_freebsd);
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