From 39382b8ba41a02240424309a1b37a88488c58be3 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Thu, 10 Sep 1998 14:09:11 +0000 Subject: Update. * sysdeps/unix/sysv/linux/Makefile (subdirs==misc) [sysdep_headers]: Remove sys/debugreg.h. * sysdeps/unix/sysv/linux/i386/Makefile (subdirs==misc) [sysdep_headers]: Add sys/debugreg.h. * sysdeps/unix/sysv/linux/sys/debugreg.h: Removed. * sysdeps/unix/sysv/linux/i386/sys/debugreg.h: New file. --- sysdeps/unix/sysv/linux/Makefile | 2 +- sysdeps/unix/sysv/linux/i386/Makefile | 2 +- sysdeps/unix/sysv/linux/i386/sys/debugreg.h | 81 +++++++++++++++++++++++++++++ sysdeps/unix/sysv/linux/sys/debugreg.h | 1 - 4 files changed, 83 insertions(+), 3 deletions(-) create mode 100644 sysdeps/unix/sysv/linux/i386/sys/debugreg.h delete mode 100644 sysdeps/unix/sysv/linux/sys/debugreg.h (limited to 'sysdeps') diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile index 13b1c1f251..6d6276a463 100644 --- a/sysdeps/unix/sysv/linux/Makefile +++ b/sysdeps/unix/sysv/linux/Makefile @@ -14,7 +14,7 @@ sysdep_routines += sysctl clone llseek getresuid getresgid umount umount2 sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h sys/mtio.h \ sys/io.h sys/klog.h sys/kdaemon.h \ sys/user.h sys/sysmacros.h sys/procfs.h sys/prctl.h \ - sys/debugreg.h sys/kd.h sys/soundcard.h sys/vt.h \ + sys/kd.h sys/soundcard.h sys/vt.h \ sys/quota.h sys/fsuid.h bits/mman.h \ scsi/sg.h scsi/scsi.h sys/pci.h sys/ultrasound.h \ sys/sendfile.h diff --git a/sysdeps/unix/sysv/linux/i386/Makefile b/sysdeps/unix/sysv/linux/i386/Makefile index 7943bb67ff..c27f390b59 100644 --- a/sysdeps/unix/sysv/linux/i386/Makefile +++ b/sysdeps/unix/sysv/linux/i386/Makefile @@ -1,6 +1,6 @@ ifeq ($(subdir),misc) sysdep_routines += ioperm iopl vm86 s_pread64 s_pwrite64 -sysdep_headers += sys/elf.h sys/perm.h sys/reg.h sys/vm86.h +sysdep_headers += sys/elf.h sys/perm.h sys/reg.h sys/vm86.h sys/debugreg.h endif ifeq ($(subdir),elf) diff --git a/sysdeps/unix/sysv/linux/i386/sys/debugreg.h b/sysdeps/unix/sysv/linux/i386/sys/debugreg.h new file mode 100644 index 0000000000..8aafd670b4 --- /dev/null +++ b/sysdeps/unix/sysv/linux/i386/sys/debugreg.h @@ -0,0 +1,81 @@ +/* Copyright (C) 1998 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _SYS_DEBUGREG_H +#define _SYS_DEBUGREG_H 1 + +/* Indicate the register numbers for a number of the specific + debug registers. Registers 0-3 contain the addresses we wish to trap on */ +#define DR_FIRSTADDR 0 /* u_debugreg[DR_FIRSTADDR] */ +#define DR_LASTADDR 3 /* u_debugreg[DR_LASTADDR] */ + +#define DR_STATUS 6 /* u_debugreg[DR_STATUS] */ +#define DR_CONTROL 7 /* u_debugreg[DR_CONTROL] */ + +/* Define a few things for the status register. We can use this to determine + which debugging register was responsible for the trap. The other bits + are either reserved or not of interest to us. */ + +#define DR_TRAP0 (0x1) /* db0 */ +#define DR_TRAP1 (0x2) /* db1 */ +#define DR_TRAP2 (0x4) /* db2 */ +#define DR_TRAP3 (0x8) /* db3 */ + +#define DR_STEP (0x4000) /* single-step */ +#define DR_SWITCH (0x8000) /* task switch */ + +/* Now define a bunch of things for manipulating the control register. + The top two bytes of the control register consist of 4 fields of 4 + bits - each field corresponds to one of the four debug registers, + and indicates what types of access we trap on, and how large the data + field is that we are looking at */ + +#define DR_CONTROL_SHIFT 16 /* Skip this many bits in ctl register */ +#define DR_CONTROL_SIZE 4 /* 4 control bits per register */ + +#define DR_RW_EXECUTE (0x0) /* Settings for the access types to trap on */ +#define DR_RW_WRITE (0x1) +#define DR_RW_READ (0x3) + +#define DR_LEN_1 (0x0) /* Settings for data length to trap on */ +#define DR_LEN_2 (0x4) +#define DR_LEN_4 (0xC) + +/* The low byte to the control register determine which registers are + enabled. There are 4 fields of two bits. One bit is "local", meaning + that the processor will reset the bit after a task switch and the other + is global meaning that we have to explicitly reset the bit. With linux, + you can use either one, since we explicitly zero the register when we enter + kernel mode. */ + +#define DR_LOCAL_ENABLE_SHIFT 0 /* Extra shift to the local enable bit */ +#define DR_GLOBAL_ENABLE_SHIFT 1 /* Extra shift to the global enable bit */ +#define DR_ENABLE_SIZE 2 /* 2 enable bits per register */ + +#define DR_LOCAL_ENABLE_MASK (0x55) /* Set local bits for all 4 regs */ +#define DR_GLOBAL_ENABLE_MASK (0xAA) /* Set global bits for all 4 regs */ + +/* The second byte to the control register has a few special things. + We can slow the instruction pipeline for instructions coming via the + gdt or the ldt if we want to. I am not sure why this is an advantage */ + +#define DR_CONTROL_RESERVED (0xFC00) /* Reserved by Intel */ +#define DR_LOCAL_SLOWDOWN (0x100) /* Local slow the pipeline */ +#define DR_GLOBAL_SLOWDOWN (0x200) /* Global slow the pipeline */ + +#endif /* sys/debugreg.h */ diff --git a/sysdeps/unix/sysv/linux/sys/debugreg.h b/sysdeps/unix/sysv/linux/sys/debugreg.h deleted file mode 100644 index 43006438e3..0000000000 --- a/sysdeps/unix/sysv/linux/sys/debugreg.h +++ /dev/null @@ -1 +0,0 @@ -#include -- cgit v1.2.3