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authorAndreas Jaeger <aj@suse.de>2001-11-21 12:22:05 +0000
committerAndreas Jaeger <aj@suse.de>2001-11-21 12:22:05 +0000
commitd987f926bb6b4a09daacc0fec023cddbf980a754 (patch)
tree53e82fa98201c2d1744ae36291aa66333e767bdb
parentdf0a1a7fabade3899faab634c3ad9aa69cb60675 (diff)
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Update.
2001-11-21 Andreas Jaeger <aj@suse.de> * sysdeps/unix/sysv/linux/x86_64/sys/debugreg.h: New file. * sysdeps/unix/sysv/linux/x86_64/Makefile (sysdep_headers): Add sys/debugreg.h
-rw-r--r--ChangeLog7
-rw-r--r--sysdeps/unix/sysv/linux/x86_64/sys/debugreg.h80
2 files changed, 87 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index b6cc46c..ac593a1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2001-11-21 Andreas Jaeger <aj@suse.de>
+
+ * sysdeps/unix/sysv/linux/x86_64/sys/debugreg.h: New file.
+
+ * sysdeps/unix/sysv/linux/x86_64/Makefile (sysdep_headers): Add
+ sys/debugreg.h
+
2001-11-15 Andreas Jaeger <aj@suse.de>
* include/features.h (__GLIBC_HAVE_LONG_LONG): Define for
diff --git a/sysdeps/unix/sysv/linux/x86_64/sys/debugreg.h b/sysdeps/unix/sysv/linux/x86_64/sys/debugreg.h
new file mode 100644
index 0000000..f40d437
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86_64/sys/debugreg.h
@@ -0,0 +1,80 @@
+/* Copyright (C) 2001 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; 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)
+#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_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. */
+#define DR_CONTROL_RESERVED (0xFC00) /* Reserved */
+#define DR_LOCAL_SLOWDOWN (0x100) /* Local slow the pipeline */
+#define DR_GLOBAL_SLOWDOWN (0x200) /* Global slow the pipeline */
+
+#endif /* sys/debugreg.h */