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Index: sys/i386/linux/linux_ptrace.c
===================================================================
--- /dev/null
+++ sys/i386/linux/linux_ptrace.c
@@ -1,473 +0,0 @@
-/*-
- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
- *
- * Copyright (c) 2001 Alexander Kabaev
- * All rights reserved.
- *
- * 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 "opt_cpu.h"
-
-#include <sys/param.h>
-#include <sys/lock.h>
-#include <sys/mutex.h>
-#include <sys/proc.h>
-#include <sys/ptrace.h>
-#include <sys/syscallsubr.h>
-#include <sys/systm.h>
-
-#include <machine/md_var.h>
-#include <machine/pcb.h>
-
-#include <i386/linux/linux.h>
-#include <i386/linux/linux_proto.h>
-#include <compat/linux/linux_signal.h>
-
-/*
- * Linux ptrace requests numbers. Mostly identical to FreeBSD,
- * except for MD ones and PT_ATTACH/PT_DETACH.
- */
-#define PTRACE_TRACEME 0
-#define PTRACE_PEEKTEXT 1
-#define PTRACE_PEEKDATA 2
-#define PTRACE_PEEKUSR 3
-#define PTRACE_POKETEXT 4
-#define PTRACE_POKEDATA 5
-#define PTRACE_POKEUSR 6
-#define PTRACE_CONT 7
-#define PTRACE_KILL 8
-#define PTRACE_SINGLESTEP 9
-
-#define PTRACE_ATTACH 16
-#define PTRACE_DETACH 17
-
-#define LINUX_PTRACE_SYSCALL 24
-
-#define PTRACE_GETREGS 12
-#define PTRACE_SETREGS 13
-#define PTRACE_GETFPREGS 14
-#define PTRACE_SETFPREGS 15
-#define PTRACE_GETFPXREGS 18
-#define PTRACE_SETFPXREGS 19
-
-#define PTRACE_SETOPTIONS 21
-
-/*
- * Linux keeps debug registers at the following
- * offset in the user struct
- */
-#define LINUX_DBREG_OFFSET 252
-#define LINUX_DBREG_SIZE (8*sizeof(l_int))
-
-static __inline int
-map_signum(int signum)
-{
-
- signum = linux_to_bsd_signal(signum);
- return ((signum == SIGSTOP)? 0 : signum);
-}
-
-struct linux_pt_reg {
- l_long ebx;
- l_long ecx;
- l_long edx;
- l_long esi;
- l_long edi;
- l_long ebp;
- l_long eax;
- l_int xds;
- l_int xes;
- l_int xfs;
- l_int xgs;
- l_long orig_eax;
- l_long eip;
- l_int xcs;
- l_long eflags;
- l_long esp;
- l_int xss;
-};
-
-/*
- * Translate i386 ptrace registers between Linux and FreeBSD formats.
- * The translation is pretty straighforward, for all registers, but
- * orig_eax on Linux side and r_trapno and r_err in FreeBSD
- */
-static void
-map_regs_to_linux(struct reg *bsd_r, struct linux_pt_reg *linux_r)
-{
- linux_r->ebx = bsd_r->r_ebx;
- linux_r->ecx = bsd_r->r_ecx;
- linux_r->edx = bsd_r->r_edx;
- linux_r->esi = bsd_r->r_esi;
- linux_r->edi = bsd_r->r_edi;
- linux_r->ebp = bsd_r->r_ebp;
- linux_r->eax = bsd_r->r_eax;
- linux_r->xds = bsd_r->r_ds;
- linux_r->xes = bsd_r->r_es;
- linux_r->xfs = bsd_r->r_fs;
- linux_r->xgs = bsd_r->r_gs;
- linux_r->orig_eax = bsd_r->r_eax;
- linux_r->eip = bsd_r->r_eip;
- linux_r->xcs = bsd_r->r_cs;
- linux_r->eflags = bsd_r->r_eflags;
- linux_r->esp = bsd_r->r_esp;
- linux_r->xss = bsd_r->r_ss;
-}
-
-static void
-map_regs_from_linux(struct reg *bsd_r, struct linux_pt_reg *linux_r)
-{
- bsd_r->r_ebx = linux_r->ebx;
- bsd_r->r_ecx = linux_r->ecx;
- bsd_r->r_edx = linux_r->edx;
- bsd_r->r_esi = linux_r->esi;
- bsd_r->r_edi = linux_r->edi;
- bsd_r->r_ebp = linux_r->ebp;
- bsd_r->r_eax = linux_r->eax;
- bsd_r->r_ds = linux_r->xds;
- bsd_r->r_es = linux_r->xes;
- bsd_r->r_fs = linux_r->xfs;
- bsd_r->r_gs = linux_r->xgs;
- bsd_r->r_eip = linux_r->eip;
- bsd_r->r_cs = linux_r->xcs;
- bsd_r->r_eflags = linux_r->eflags;
- bsd_r->r_esp = linux_r->esp;
- bsd_r->r_ss = linux_r->xss;
-}
-
-struct linux_pt_fpreg {
- l_long cwd;
- l_long swd;
- l_long twd;
- l_long fip;
- l_long fcs;
- l_long foo;
- l_long fos;
- l_long st_space[2*10];
-};
-
-static void
-map_fpregs_to_linux(struct fpreg *bsd_r, struct linux_pt_fpreg *linux_r)
-{
- linux_r->cwd = bsd_r->fpr_env[0];
- linux_r->swd = bsd_r->fpr_env[1];
- linux_r->twd = bsd_r->fpr_env[2];
- linux_r->fip = bsd_r->fpr_env[3];
- linux_r->fcs = bsd_r->fpr_env[4];
- linux_r->foo = bsd_r->fpr_env[5];
- linux_r->fos = bsd_r->fpr_env[6];
- bcopy(bsd_r->fpr_acc, linux_r->st_space, sizeof(linux_r->st_space));
-}
-
-static void
-map_fpregs_from_linux(struct fpreg *bsd_r, struct linux_pt_fpreg *linux_r)
-{
- bsd_r->fpr_env[0] = linux_r->cwd;
- bsd_r->fpr_env[1] = linux_r->swd;
- bsd_r->fpr_env[2] = linux_r->twd;
- bsd_r->fpr_env[3] = linux_r->fip;
- bsd_r->fpr_env[4] = linux_r->fcs;
- bsd_r->fpr_env[5] = linux_r->foo;
- bsd_r->fpr_env[6] = linux_r->fos;
- bcopy(bsd_r->fpr_acc, linux_r->st_space, sizeof(bsd_r->fpr_acc));
-}
-
-struct linux_pt_fpxreg {
- l_ushort cwd;
- l_ushort swd;
- l_ushort twd;
- l_ushort fop;
- l_long fip;
- l_long fcs;
- l_long foo;
- l_long fos;
- l_long mxcsr;
- l_long reserved;
- l_long st_space[32];
- l_long xmm_space[32];
- l_long padding[56];
-};
-
-static int
-linux_proc_read_fpxregs(struct thread *td, struct linux_pt_fpxreg *fpxregs)
-{
-
- PROC_LOCK_ASSERT(td->td_proc, MA_OWNED);
- if (cpu_fxsr == 0 || (td->td_proc->p_flag & P_INMEM) == 0)
- return (EIO);
- bcopy(&get_pcb_user_save_td(td)->sv_xmm, fpxregs, sizeof(*fpxregs));
- return (0);
-}
-
-static int
-linux_proc_write_fpxregs(struct thread *td, struct linux_pt_fpxreg *fpxregs)
-{
-
- PROC_LOCK_ASSERT(td->td_proc, MA_OWNED);
- if (cpu_fxsr == 0 || (td->td_proc->p_flag & P_INMEM) == 0)
- return (EIO);
- bcopy(fpxregs, &get_pcb_user_save_td(td)->sv_xmm, sizeof(*fpxregs));
- return (0);
-}
-
-int
-linux_ptrace(struct thread *td, struct linux_ptrace_args *uap)
-{
- union {
- struct linux_pt_reg reg;
- struct linux_pt_fpreg fpreg;
- struct linux_pt_fpxreg fpxreg;
- } r;
- union {
- struct reg bsd_reg;
- struct fpreg bsd_fpreg;
- struct dbreg bsd_dbreg;
- } u;
- void *addr;
- pid_t pid;
- int error, req;
-
- error = 0;
-
- /* by default, just copy data intact */
- req = uap->req;
- pid = (pid_t)uap->pid;
- addr = (void *)uap->addr;
-
- switch (req) {
- case PTRACE_TRACEME:
- case PTRACE_POKETEXT:
- case PTRACE_POKEDATA:
- case PTRACE_KILL:
- error = kern_ptrace(td, req, pid, addr, uap->data);
- break;
- case PTRACE_PEEKTEXT:
- case PTRACE_PEEKDATA: {
- /* need to preserve return value */
- int rval = td->td_retval[0];
- error = kern_ptrace(td, req, pid, addr, 0);
- if (error == 0)
- error = copyout(td->td_retval, (void *)uap->data,
- sizeof(l_int));
- td->td_retval[0] = rval;
- break;
- }
- case PTRACE_DETACH:
- error = kern_ptrace(td, PT_DETACH, pid, (void *)1,
- map_signum(uap->data));
- break;
- case PTRACE_SINGLESTEP:
- case PTRACE_CONT:
- error = kern_ptrace(td, req, pid, (void *)1,
- map_signum(uap->data));
- break;
- case PTRACE_ATTACH:
- error = kern_ptrace(td, PT_ATTACH, pid, addr, uap->data);
- break;
- case PTRACE_GETREGS:
- /* Linux is using data where FreeBSD is using addr */
- error = kern_ptrace(td, PT_GETREGS, pid, &u.bsd_reg, 0);
- if (error == 0) {
- map_regs_to_linux(&u.bsd_reg, &r.reg);
- error = copyout(&r.reg, (void *)uap->data,
- sizeof(r.reg));
- }
- break;
- case PTRACE_SETREGS:
- /* Linux is using data where FreeBSD is using addr */
- error = copyin((void *)uap->data, &r.reg, sizeof(r.reg));
- if (error == 0) {
- map_regs_from_linux(&u.bsd_reg, &r.reg);
- error = kern_ptrace(td, PT_SETREGS, pid, &u.bsd_reg, 0);
- }
- break;
- case PTRACE_GETFPREGS:
- /* Linux is using data where FreeBSD is using addr */
- error = kern_ptrace(td, PT_GETFPREGS, pid, &u.bsd_fpreg, 0);
- if (error == 0) {
- map_fpregs_to_linux(&u.bsd_fpreg, &r.fpreg);
- error = copyout(&r.fpreg, (void *)uap->data,
- sizeof(r.fpreg));
- }
- break;
- case PTRACE_SETFPREGS:
- /* Linux is using data where FreeBSD is using addr */
- error = copyin((void *)uap->data, &r.fpreg, sizeof(r.fpreg));
- if (error == 0) {
- map_fpregs_from_linux(&u.bsd_fpreg, &r.fpreg);
- error = kern_ptrace(td, PT_SETFPREGS, pid,
- &u.bsd_fpreg, 0);
- }
- break;
- case PTRACE_SETFPXREGS:
- error = copyin((void *)uap->data, &r.fpxreg, sizeof(r.fpxreg));
- if (error)
- break;
- /* FALL THROUGH */
- case PTRACE_GETFPXREGS: {
- struct proc *p;
- struct thread *td2;
-
- if (sizeof(struct linux_pt_fpxreg) != sizeof(struct savexmm)) {
- static int once = 0;
- if (!once) {
- printf("linux: savexmm != linux_pt_fpxreg\n");
- once = 1;
- }
- error = EIO;
- break;
- }
-
- if ((p = pfind(uap->pid)) == NULL) {
- error = ESRCH;
- break;
- }
-
- /* Exiting processes can't be debugged. */
- if ((p->p_flag & P_WEXIT) != 0) {
- error = ESRCH;
- goto fail;
- }
-
- if ((error = p_candebug(td, p)) != 0)
- goto fail;
-
- /* System processes can't be debugged. */
- if ((p->p_flag & P_SYSTEM) != 0) {
- error = EINVAL;
- goto fail;
- }
-
- /* not being traced... */
- if ((p->p_flag & P_TRACED) == 0) {
- error = EPERM;
- goto fail;
- }
-
- /* not being traced by YOU */
- if (p->p_pptr != td->td_proc) {
- error = EBUSY;
- goto fail;
- }
-
- /* not currently stopped */
- if (!P_SHOULDSTOP(p) || (p->p_flag & P_WAITED) == 0) {
- error = EBUSY;
- goto fail;
- }
-
- if (req == PTRACE_GETFPXREGS) {
- _PHOLD(p); /* may block */
- td2 = FIRST_THREAD_IN_PROC(p);
- error = linux_proc_read_fpxregs(td2, &r.fpxreg);
- _PRELE(p);
- PROC_UNLOCK(p);
- if (error == 0)
- error = copyout(&r.fpxreg, (void *)uap->data,
- sizeof(r.fpxreg));
- } else {
- /* clear dangerous bits exactly as Linux does*/
- r.fpxreg.mxcsr &= 0xffbf;
- _PHOLD(p); /* may block */
- td2 = FIRST_THREAD_IN_PROC(p);
- error = linux_proc_write_fpxregs(td2, &r.fpxreg);
- _PRELE(p);
- PROC_UNLOCK(p);
- }
- break;
-
- fail:
- PROC_UNLOCK(p);
- break;
- }
- case PTRACE_PEEKUSR:
- case PTRACE_POKEUSR: {
- error = EIO;
-
- /* check addr for alignment */
- if (uap->addr < 0 || uap->addr & (sizeof(l_int) - 1))
- break;
- /*
- * Allow Linux programs to access register values in
- * user struct. We simulate this through PT_GET/SETREGS
- * as necessary.
- */
- if (uap->addr < sizeof(struct linux_pt_reg)) {
- error = kern_ptrace(td, PT_GETREGS, pid, &u.bsd_reg, 0);
- if (error != 0)
- break;
-
- map_regs_to_linux(&u.bsd_reg, &r.reg);
- if (req == PTRACE_PEEKUSR) {
- error = copyout((char *)&r.reg + uap->addr,
- (void *)uap->data, sizeof(l_int));
- break;
- }
-
- *(l_int *)((char *)&r.reg + uap->addr) =
- (l_int)uap->data;
-
- map_regs_from_linux(&u.bsd_reg, &r.reg);
- error = kern_ptrace(td, PT_SETREGS, pid, &u.bsd_reg, 0);
- }
-
- /*
- * Simulate debug registers access
- */
- if (uap->addr >= LINUX_DBREG_OFFSET &&
- uap->addr <= LINUX_DBREG_OFFSET + LINUX_DBREG_SIZE) {
- error = kern_ptrace(td, PT_GETDBREGS, pid, &u.bsd_dbreg,
- 0);
- if (error != 0)
- break;
-
- uap->addr -= LINUX_DBREG_OFFSET;
- if (req == PTRACE_PEEKUSR) {
- error = copyout((char *)&u.bsd_dbreg +
- uap->addr, (void *)uap->data,
- sizeof(l_int));
- break;
- }
-
- *(l_int *)((char *)&u.bsd_dbreg + uap->addr) =
- uap->data;
- error = kern_ptrace(td, PT_SETDBREGS, pid,
- &u.bsd_dbreg, 0);
- }
-
- break;
- }
- case LINUX_PTRACE_SYSCALL:
- /* fall through */
- default:
- printf("linux: ptrace(%u, ...) not implemented\n",
- (unsigned int)uap->req);
- error = EINVAL;
- break;
- }
-
- return (error);
-}
Index: sys/modules/linux/Makefile
===================================================================
--- sys/modules/linux/Makefile
+++ sys/modules/linux/Makefile
@@ -40,8 +40,8 @@
OBJS= linux${SFX}_vdso.so
.if ${MACHINE_CPUARCH} == "i386"
-SRCS+= linux_ptrace.c imgact_linux.c linux_util.c linux_mib.c linux_mmap.c \
- linux_dummy.c linux_emul.c linux_errno.c opt_cpu.h linux.c
+SRCS+= linux_ptrace_machdep.c imgact_linux.c linux_util.c linux_mib.c \
+ linux_mmap.c linux_dummy.c linux_emul.c linux_errno.c opt_cpu.h linux.c
.endif
.if ${MACHINE_CPUARCH} == "i386"

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