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OS: Linux p3plzcpnl507578.prod.phx3.secureserver.net 4.18.0-553.141.2.lve.el8.x86_64 #1 SMP Wed Jul 8 16:10:02 UTC 2026 x86_64

Directory: /proc/self/root/usr/include/asm/

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File: debugreg.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _ASM_X86_DEBUGREG_H
#define _ASM_X86_DEBUGREG_H

/* 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 reserved bits in DR6 which are always set to 1 */
#define DR6_RESERVED	(0xFFFF0FF0)

#define DR_TRAP0	(0x1)		/* db0 */
#define DR_TRAP1	(0x2)		/* db1 */
#define DR_TRAP2	(0x4)		/* db2 */
#define DR_TRAP3	(0x8)		/* db3 */
#define DR_TRAP_BITS	(DR_TRAP0|DR_TRAP1|DR_TRAP2|DR_TRAP3)

#define DR_BUS_LOCK	(0x800)		/* bus_lock */
#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)
#define DR_LEN_8 (0x8)

/* 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_LOCAL_ENABLE (0x1)      /* Local enable for reg 0 */
#define DR_GLOBAL_ENABLE (0x2)     /* Global enable for reg 0 */
#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 */

#ifdef __i386__
#define DR_CONTROL_RESERVED (0xFC00) /* Reserved by Intel */
#else
#define DR_CONTROL_RESERVED (0xFFFFFFFF0000FC00UL) /* Reserved */
#endif

#define DR_LOCAL_SLOWDOWN (0x100)   /* Local slow the pipeline */
#define DR_GLOBAL_SLOWDOWN (0x200)  /* Global slow the pipeline */

/*
 * HW breakpoint additions
 */

#endif /* _ASM_X86_DEBUGREG_H */

Name	Size	Permissions	Options
a.out.h	756 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
amd_hsmp.h	8892 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
auxvec.h	618 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
bitsperlong.h	321 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
boot.h	323 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
bootparam.h	7759 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
bpf_perf_event.h	40 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
byteorder.h	176 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
debugreg.h	3329 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
e820.h	2579 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
errno.h	31 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
fcntl.h	31 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
hwcap2.h	270 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
hw_breakpoint.h	69 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
ioctl.h	31 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
ioctls.h	32 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
ipcbuf.h	32 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
ist.h	854 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
kvm.h	11719 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
kvm_para.h	4340 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
kvm_perf.h	388 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
ldt.h	1306 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
mce.h	1688 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
mman.h	1002 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
msgbuf.h	1053 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
msr.h	346 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
mtrr.h	4225 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
param.h	31 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
perf_regs.h	1403 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
poll.h	30 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
posix_types.h	224 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
posix_types_32.h	765 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
posix_types_64.h	609 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
posix_types_x32.h	581 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
prctl.h	618 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
processor-flags.h	6623 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
ptrace-abi.h	2037 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
ptrace.h	1495 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
resource.h	34 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
sembuf.h	1045 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
setup.h	6 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
sgx.h	8342 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
shmbuf.h	1258 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
sigcontext.h	9724 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
sigcontext32.h	247 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
siginfo.h	422 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
signal.h	2901 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
socket.h	32 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
sockios.h	33 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
stat.h	3131 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
statfs.h	416 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
svm.h	9773 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
swab.h	724 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
termbits.h	34 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
termios.h	33 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
types.h	152 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
ucontext.h	2117 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
unistd.h	359 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
unistd_32.h	11131 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
unistd_64.h	9316 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
unistd_x32.h	16419 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
vm86.h	3118 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
vmx.h	7368 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete
vsyscall.h	263 bytes	rw-r--r--	Edit \| Rename \| Chmod \| Delete