[PATCH,RFC 2.6.14 13/15] KGDB: CFI annotations for better unwinding

Tom Rini
2005-11-10T16:45:09Z

There are some parts of the kernel where you simply cannot unwind past. This
does not, however, stop GDB from trying, and getting stuck in an infinite loop
(it will get garbage back, try and unwind that, repeat). The way to fix this
is to manually insert some DWARF2 information into the kernel so that GDB will
cleanly (or almost cleanly, it will get the same frame twice, and stop) stop.
George wrote much of the IMHO hard part here (i386 & the macros) and I
expanded this to all of the other arches. This adds a small amount to the
DEBUG_INFO=y kernel size, but that's not unexpected.

Makefile | 6
arch/arm/kernel/entry-armv.S | 2
arch/i386/kernel/entry.S | 111 +++++-
arch/i386/kernel/head.S | 5
arch/i386/kernel/process.c | 20 +
arch/i386/kernel/smpboot.c | 3
arch/x86_64/kernel/entry.S | 2
include/asm-arm/kgdb.h | 7
include/asm-generic/kgdb.h | 34 +
include/asm-i386/kgdb.h | 59 +--
include/asm-mips/kgdb.h | 4
include/asm-ppc/kgdb.h | 1
include/asm-sh/kgdb.h | 1
include/asm-x86_64/kgdb.h | 4
include/linux/dwarf2-lang.h | 300 ++++++++++++++++
include/linux/dwarf2.h | 775 +++++++++++++++++++++++++++++++++++++++++++
scripts/dwarfh.awk | 19 +
17 files changed, 1322 insertions(+), 31 deletions(-)

Index: linux-2.6.14/arch/arm/kernel/entry-armv.S
===================================================================
--- linux-2.6.14.orig/arch/arm/kernel/entry-armv.S
+++ linux-2.6.14/arch/arm/kernel/entry-armv.S
@@ -15,6 +15,7 @@
*/
#include <linux/config.h>

+#include <asm/kgdb.h>
#include <asm/glue.h>
#include <asm/vfpmacros.h>
#include <asm/hardware.h> /* should be moved into entry-macro.S */
@@ -215,6 +216,7 @@ svc_preempt:
beq preempt_return @ go again
b 1b
#endif
+ CFI_END_FRAME(__irq_svc)

.align 5
__und_svc:
Index: linux-2.6.14/arch/i386/kernel/entry.S
===================================================================
--- linux-2.6.14.orig/arch/i386/kernel/entry.S
+++ linux-2.6.14/arch/i386/kernel/entry.S
@@ -123,7 +123,7 @@ VM_MASK = 0x00020000
.previous

-ENTRY(ret_from_fork)
+KPROBE_ENTRY(ret_from_fork)
pushl %eax
call schedule_tail
GET_THREAD_INFO(%ebp)
@@ -470,7 +470,7 @@ ENTRY(simd_coprocessor_error)
pushl $do_simd_coprocessor_error
jmp error_code

-ENTRY(device_not_available)
+KPROBE_ENTRY(device_not_available)
pushl $-1 # mark this as an int
SAVE_ALL
movl %cr0, %eax
@@ -653,7 +653,7 @@ ENTRY(machine_check)
jmp error_code
#endif

-ENTRY(spurious_interrupt_bug)
+KPROBE_ENTRY(spurious_interrupt_bug)
pushl $0
pushl $do_spurious_interrupt_bug
jmp error_code
@@ -661,3 +661,108 @@ ENTRY(spurious_interrupt_bug)
#include "syscall_table.S"

syscall_table_size=(.-sys_call_table)
+
+# Here we do call frames. We cheat a bit as we only really need
+# correct frames at locations we can actually look at from a
+# debugger. Since the break instruction trap actually goes thru
+# some of this code, we don't really need info on those areas, but
+# only after the fact. I.e. if we can not step or break in a
+# location or end up with a return address pointing at the
+# location, we don't need a correct call frame for it.
+
+#ifdef CONFIG_KGDB
+
+#include <linux/dwarf2-lang.h>
+/*
+ * The register numbers as known by gdb
+ */
+
+#define _EAX 0
+#define _ECX 1
+#define _EDX 2
+#define _EBX 3
+#define _ESP 4
+#define _EBP 5
+#define _ESI 6
+#define _EDI 7
+#define _PC 8
+#define _EIP 8
+#define _PS 9
+#define _EFLAGS 9
+#define _CS 10
+#define _SS 11
+#define _DS 12
+#define _ES 13
+#define _FS 14
+#define _GS 15
+ /*
+ * This code uses macros defined in linux/dwarf2-lang.h
+ * They attempt to follow the dwarf2 naming conventions... sort of..
+ */
+ENTRY(end_of_stack_stop_unwind_function)
+ .long end_of_stack_stop_unwind_function+1
+
+ .text
+
+ CFI_preamble(c1,_PC,1,1)
+ CFA_define_reference(_ESP,OLDESP) /* Stack pointer */
+ CFA_expression(_EIP)
+ CFA_exp_OP_dup /* copy old esp */
+ CFA_exp_OP_consts(CS-OLDESP) /* offset to CS address */
+ CFA_exp_OP_plus /* should be CS address */
+ CFA_exp_OP_deref /* get the CS */
+ CFA_exp_OP_const4s(VM_MASK|3) /* prepare to mask it */
+ CFA_exp_OP_and /* mask it, zero means kernel */
+ CFA_exp_OP_bra(eip_user_rtn) /* branch if user */
+ CFA_exp_OP_const4s(EIP-OLDESP) /* offset to return address */
+ CFA_exp_OP_plus /* add that in */
+ CFA_exp_OP_skip(eip_end) /* done if kernel, skip out */
+eip_user_rtn:
+ CFA_exp_OP_addr(end_of_stack_stop_unwind_function)/*dummy function */
+eip_end:
+ CFA_expression_end
+ CFA_define_offset(_EBX,EBX-OLDESP)
+ CFA_define_offset(_ECX,ECX-OLDESP)
+ CFA_define_offset(_EDX,EDX-OLDESP)
+ CFA_define_offset(_ESI,ESI-OLDESP)
+ CFA_define_offset(_EDI,EDI-OLDESP)
+ CFA_define_offset(_EBP,EBP-OLDESP)
+ CFA_define_offset(_EAX,EAX-OLDESP)
+ CFA_define_offset(_EFLAGS,EFLAGS-OLDESP)
+ CFI_postamble()
+
+/*
+ * This provides an uwind for our dummy end of unwind function.
+ * Current convention is to provied an undefined return address.
+ */
+ CFI_preamble(c2,_PC,1,1)
+ CFA_define_reference(_ESP,0) /* Stack pointer */
+ CFA_undefine_reg(_EIP)
+ CFI_postamble()
+
+ FDE_preamble(c2,end_of_stack_stop_unwind_function, \
+ end_of_stack_stop_unwind_function+5)
+ FDE_postamble()
+ /*
+ * This is VERY sloppy. At this point all we want to do is get
+ * the frame right for back tracing. It will not be good if
+ * you try to single step. We use already defined labels.
+ * We want to cover all call outs.
+ * We could also recode this as just one FDE, but this works and
+ * I want to get it out.
+ */
+ FDE_preamble(c1,ret_from_fork,ret_from_exception)
+ CFA_define_cfa_offset(4) /* one extra word on stack */
+ FDE_postamble()
+
+ FDE_preamble(c1,ret_from_exception,device_not_available_emulate)
+ FDE_postamble()
+
+ FDE_preamble(c1,device_not_available_emulate,debug)
+ CFA_define_cfa_offset(4) /* one extra word on stack */
+ FDE_postamble()
+
+ FDE_preamble(c1, debug,spurious_interrupt_bug)
+ FDE_postamble()
+
+#endif
Index: linux-2.6.14/arch/i386/kernel/head.S
===================================================================
--- linux-2.6.14.orig/arch/i386/kernel/head.S
+++ linux-2.6.14/arch/i386/kernel/head.S
@@ -11,6 +11,7 @@
#include <linux/config.h>
#include <linux/threads.h>
#include <linux/linkage.h>
+#include <asm/kgdb.h>
#include <asm/segment.h>
#include <asm/page.h>
#include <asm/pgtable.h>
@@ -332,7 +333,9 @@ is386: movl $2,%ecx # set MP
L6:
jmp L6 # main should never return here, but
# just in case, we know what happens.
-
+ /* This dwarf code tells gdb that this is the end of the unwind */
+ /* This uses the CFA set up for pc=1 located in entry.S */
+ CFI_END_FRAME(is386)
/*
* We depend on ET to be correct. This checks for 287/387.
*/
Index: linux-2.6.14/arch/i386/kernel/process.c
===================================================================
--- linux-2.6.14.orig/arch/i386/kernel/process.c
+++ linux-2.6.14/arch/i386/kernel/process.c
@@ -335,7 +335,27 @@ __asm__(".section .text\n"
"call *%ebx\n\t"
"pushl %eax\n\t"
"call do_exit\n"
+ "kernel_thread_helper_end:\n\t"
".previous");
+#ifdef CONFIG_KGDB
+#include <linux/dwarf2-lang.h>
+
+ /* This dwarf code tells gdb that this is the end of the unwind */
+ /* This uses the CFA set up for pc=1 located in entry.S */
+#define _ESP 4
+#define _PC 8
+#define _EIP 8
+__asm__(
+ QUOTE_THIS(
+ CFI_preamble(dwarf_4,_PC,1,1)
+ CFA_define_reference(_ESP,0) /* Stack pointer */
+ CFA_undefine_reg(_EIP)
+ CFI_postamble()
+
+ FDE_preamble(dwarf_4,kernel_thread_helper,kernel_thread_helper_end)
+ FDE_postamble()
+ ));
+#endif

/*
* Create a kernel thread
Index: linux-2.6.14/arch/i386/kernel/smpboot.c
===================================================================
--- linux-2.6.14.orig/arch/i386/kernel/smpboot.c
+++ linux-2.6.14/arch/i386/kernel/smpboot.c
@@ -538,6 +538,9 @@ void __devinit initialize_secondary(void

asm volatile(
"movl %0,%%esp\n\t"
+#ifdef CONFIG_KGDB
+ "pushl end_of_stack_stop_unwind_function\n\t"
+#endif
"jmp *%1"
:
:"r" (current->thread.esp),"r" (current->thread.eip));
Index: linux-2.6.14/arch/x86_64/kernel/entry.S
===================================================================
--- linux-2.6.14.orig/arch/x86_64/kernel/entry.S
+++ linux-2.6.14/arch/x86_64/kernel/entry.S
@@ -41,6 +41,7 @@
#include <asm/unistd.h>
#include <asm/thread_info.h>
#include <asm/hw_irq.h>
+#include <asm/kgdb.h>

.code64

@@ -840,6 +841,7 @@ ENTRY(kernel_thread)
UNFAKE_STACK_FRAME
ret
CFI_ENDPROC
+ CFI_END_FRAME(kernel_thread)

child_rip:
Index: linux-2.6.14/include/asm-arm/kgdb.h
===================================================================
--- linux-2.6.14.orig/include/asm-arm/kgdb.h
+++ linux-2.6.14/include/asm-arm/kgdb.h
@@ -14,6 +14,7 @@

#include <linux/config.h>
#include <asm/ptrace.h>
+#include <asm-generic/kgdb.h>

/*
@@ -48,6 +49,7 @@

extern void kgdb_handle_bus_error(void);
extern int kgdb_fault_expected;
+#endif /* !__ASSEMBLY__ */

/*
* From Amit S. Kale:
@@ -83,5 +85,8 @@ extern int kgdb_fault_expected;
#define _PC 15
#define _CPSR (GDB_MAX_REGS - 1)

-#endif /* !__ASSEMBLY__ */
+/* So that we can denote the end of a frame for tracing, in the simple
+ * case. */
+#define CFI_END_FRAME(func) __CFI_END_FRAME(_PC,_SP,func)
+
#endif /* __ASM_KGDB_H__ */
Index: linux-2.6.14/include/asm-generic/kgdb.h
===================================================================
--- /dev/null
+++ linux-2.6.14/include/asm-generic/kgdb.h
@@ -0,0 +1,34 @@
+/*
+ * include/asm-generic/kgdb.h
+ *
+ * This provides the assembly level information so that KGDB can provide
+ * a GDB that has been patched with enough information to know to stop
+ * trying to unwind the function.
+ *
+ * Author: Tom Rini <trini@kernel.crashing.org>
+ *
+ * 2005 (c) MontaVista Software, Inc. This file is licensed under the terms
+ * of the GNU General Public License version 2. This program is licensed
+ * "as is" without any warranty of any kind, whether express or implied.
+ */
+
+#ifndef __ASM_GENERIC_KGDB_H__
+#define __ASM_GENERIC_KGDB_H__
+
+#include <linux/dwarf2-lang.h>
+#ifdef __ASSEMBLY__
+#ifdef CONFIG_KGDB
+/* This MUST be put at the end of a given assembly function */
+#define __CFI_END_FRAME(pc,sp,func) \
+CAT3(.Lend_,func,:) \
+ CFI_preamble(func,pc,0x1,-DATA_ALIGN_FACTOR) \
+ CFA_define_reference(sp, 0) \
+ CFA_undefine_reg(pc) \
+ CFI_postamble() \
+ FDE_preamble(func,func,CAT3(.Lend,_,func)) \
+ FDE_postamble()
+#else
+#define __CFI_END_FRAME(pc,sp,fn)
+#endif /* CONFIG_KGDB */
+#endif /* __ASSEMBLY__ */
+#endif /* __ASM_GENERIC_KGDB_H__ */
Index: linux-2.6.14/include/asm-i386/kgdb.h
===================================================================
--- linux-2.6.14.orig/include/asm-i386/kgdb.h
+++ linux-2.6.14/include/asm-i386/kgdb.h
@@ -6,6 +6,39 @@
* Copyright (C) 2001-2004 Amit S. Kale
*/

+#include <asm-generic/kgdb.h>
+
+/*
+ * Note that this register image is in a different order than
+ * the register image that Linux produces at interrupt time.
+ *
+ * Linux's register image is defined by struct pt_regs in ptrace.h.
+ * Just why GDB uses a different order is a historical mystery.
+ */
+#define _EAX 0
+#define _ECX 1
+#define _EDX 2
+#define _EBX 3
+#define _ESP 4
+#define _EBP 5
+#define _ESI 6
+#define _EDI 7
+#define _PC 8
+#define _EIP 8
+#define _PS 9
+#define _EFLAGS 9
+#define _CS 10
+#define _SS 11
+#define _DS 12
+#define _ES 13
+#define _FS 14
+#define _GS 15
+
+/* So that we can denote the end of a frame for tracing, in the simple
+ * case. */
+#define CFI_END_FRAME(func) __CFI_END_FRAME(_EIP,_ESP,func)
+
+#ifndef __ASSEMBLY__
/************************************************************************/
/* BUFMAX defines the maximum number of characters in inbound/outbound buffers*/
/* at least NUMREGBYTES*2 are needed for register packets */
@@ -17,33 +50,9 @@
/* Number of bytes of registers we need to save for a setjmp/longjmp. */
#define NUMCRITREGBYTES 24

-/*
- * Note that this register image is in a different order than
- * the register image that Linux produces at interrupt time.
- *
- * Linux's register image is defined by struct pt_regs in ptrace.h.
- * Just why GDB uses a different order is a historical mystery.
- */
-enum regnames { _EAX, /* 0 */
- _ECX, /* 1 */
- _EDX, /* 2 */
- _EBX, /* 3 */
- _ESP, /* 4 */
- _EBP, /* 5 */
- _ESI, /* 6 */
- _EDI, /* 7 */
- _PC, /* 8 also known as eip */
- _PS, /* 9 also known as eflags */
- _CS, /* 10 */
- _SS, /* 11 */
- _DS, /* 12 */
- _ES, /* 13 */
- _FS, /* 14 */
- _GS /* 15 */
-};
-
#define BREAKPOINT() asm(" int $3");
#define BREAK_INSTR_SIZE 1
#define CACHE_FLUSH_IS_SAFE 1
+#endif /* !__ASSEMBLY__ */
#endif /* _ASM_KGDB_H_ */
#endif /* __KERNEL__ */
Index: linux-2.6.14/include/asm-mips/kgdb.h
===================================================================
--- linux-2.6.14.orig/include/asm-mips/kgdb.h
+++ linux-2.6.14/include/asm-mips/kgdb.h
@@ -2,6 +2,9 @@
#ifndef _ASM_KGDB_H_
#define _ASM_KGDB_H_

+#include <asm-generic/kgdb.h>
+
+#ifndef __ASSEMBLY__
#define BUFMAX 2048
#define NUMREGBYTES (90*sizeof(long))
#define NUMCRITREGBYTES (12*sizeof(long))
@@ -17,5 +20,6 @@

extern int kgdb_early_setup;

+#endif /* !__ASSEMBLY__ */
#endif /* _ASM_KGDB_H_ */
#endif /* __KERNEL__ */
Index: linux-2.6.14/include/asm-ppc/kgdb.h
===================================================================
--- linux-2.6.14.orig/include/asm-ppc/kgdb.h
+++ linux-2.6.14/include/asm-ppc/kgdb.h
@@ -12,6 +12,7 @@
#ifndef _PPC_KGDB_H
#define _PPC_KGDB_H

+#include <asm-generic/kgdb.h>
#ifndef __ASSEMBLY__

#define BREAK_INSTR_SIZE 4
Index: linux-2.6.14/include/asm-sh/kgdb.h
===================================================================
--- linux-2.6.14.orig/include/asm-sh/kgdb.h
+++ linux-2.6.14/include/asm-sh/kgdb.h
@@ -14,6 +14,7 @@
#ifndef __KGDB_H
#define __KGDB_H

+#include <asm-generic/kgdb.h>
/* Based on sh-gdb.c from gdb-6.1, Glenn
Engel at HP Ben Lee and Steve Chamberlain */
#define NUMREGBYTES 112 /* 92 */
Index: linux-2.6.14/include/asm-x86_64/kgdb.h
===================================================================
--- linux-2.6.14.orig/include/asm-x86_64/kgdb.h
+++ linux-2.6.14/include/asm-x86_64/kgdb.h
@@ -6,6 +6,8 @@
* Copyright (C) 2001-2004 Amit S. Kale
*/

+#include <asm-generic/kgdb.h>
+
/*
* Note that this register image is in a different order than
* the register image that Linux produces at interrupt time.
@@ -36,6 +38,8 @@
#define NUMREGBYTES ((_PS+1)*8)
#define NUMCRITREGBYTES (8 * 8) /* 8 registers. */

+/* Help GDB to know when to stop backtracing. */
+#define CFI_END_FRAME(func) __CFI_END_FRAME(_PC,_RSP,func)
#ifndef __ASSEMBLY__
/* BUFMAX defines the maximum number of characters in inbound/outbound
* buffers at least NUMREGBYTES*2 are needed for register packets, and
Index: linux-2.6.14/include/linux/dwarf2.h
===================================================================
--- /dev/null
+++ linux-2.6.14/include/linux/dwarf2.h
@@ -0,0 +1,775 @@
+/* Declarations and definitions of codes relating to the DWARF2 symbolic
+ debugging information format.
+ Copyright (C) 1992, 1993, 1995, 1996, 1997, 1999, 2000, 2001, 2002,
+ 2003 Free Software Foundation, Inc.
+
+ Written by Gary Funck (gary@intrepid.com) The Ada Joint Program
+ Office (AJPO), Florida State Unviversity and Silicon Graphics Inc.
+ provided support for this effort -- June 21, 1995.
+
+ Derived from the DWARF 1 implementation written by Ron Guilmette
+ (rfg@netcom.com), November 1990.
+
+ This file is part of GCC.
+
+ GCC is free software; you can redistribute it and/or modify it under
+ the terms of the GNU General Public License as published by the Free
+ Software Foundation; either version 2, or (at your option) any later
+ version.
+
+ GCC 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 General Public
+ License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GCC; see the file COPYING. If not, write to the Free
+ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
+
+/* This file is derived from the DWARF specification (a public document)
+ Revision 2.0.0 (July 27, 1993) developed by the UNIX International
+ Programming Languages Special Interest Group (UI/PLSIG) and distributed
+ by UNIX International. Copies of this specification are available from
+ UNIX International, 20 Waterview Boulevard, Parsippany, NJ, 07054.
+
+ This file also now contains definitions from the DWARF 3 specification. */
+
+/* This file is shared between GCC and GDB, and should not contain
+ prototypes. */
+
+#ifndef _ELF_DWARF2_H
+#define _ELF_DWARF2_H
+
+/* Structure found in the .debug_line section. */
+typedef struct
+{
+ unsigned char li_length [4];
+ unsigned char li_version [2];
+ unsigned char li_prologue_length [4];
+ unsigned char li_min_insn_length [1];
+ unsigned char li_default_is_stmt [1];
+ unsigned char li_line_base [1];
+ unsigned char li_line_range [1];
+ unsigned char li_opcode_base [1];
+}
+DWARF2_External_LineInfo;
+
+typedef struct
+{
+ unsigned long li_length;
+ unsigned short li_version;
+ unsigned int li_prologue_length;
+ unsigned char li_min_insn_length;
+ unsigned char li_default_is_stmt;
+ int li_line_base;
+ unsigned char li_line_range;
+ unsigned char li_opcode_base;
+}
+DWARF2_Internal_LineInfo;
+
+/* Structure found in .debug_pubnames section. */
+typedef struct
+{
+ unsigned char pn_length [4];
+ unsigned char pn_version [2];
+ unsigned char pn_offset [4];
+ unsigned char pn_size [4];
+}
+DWARF2_External_PubNames;
+
+typedef struct
+{
+ unsigned long pn_length;
+ unsigned short pn_version;
+ unsigned long pn_offset;
+ unsigned long pn_size;
+}
+DWARF2_Internal_PubNames;
+
+/* Structure found in .debug_info section. */
+typedef struct
+{
+ unsigned char cu_length [4];
+ unsigned char cu_version [2];
+ unsigned char cu_abbrev_offset [4];
+ unsigned char cu_pointer_size [1];
+}
+DWARF2_External_CompUnit;
+
+typedef struct
+{
+ unsigned long cu_length;
+ unsigned short cu_version;
+ unsigned long cu_abbrev_offset;
+ unsigned char cu_pointer_size;
+}
+DWARF2_Internal_CompUnit;
+
+typedef struct
+{
+ unsigned char ar_length [4];
+ unsigned char ar_version [2];
+ unsigned char ar_info_offset [4];
+ unsigned char ar_pointer_size [1];
+ unsigned char ar_segment_size [1];
+}
+DWARF2_External_ARange;
+
+typedef struct
+{
+ unsigned long ar_length;
+ unsigned short ar_version;
+ unsigned long ar_info_offset;
+ unsigned char ar_pointer_size;
+ unsigned char ar_segment_size;
+}
+DWARF2_Internal_ARange;
+
+
+/* Tag names and codes. */
+enum dwarf_tag
+ {
+ DW_TAG_padding = 0x00,
+ DW_TAG_array_type = 0x01,
+ DW_TAG_class_type = 0x02,
+ DW_TAG_entry_point = 0x03,
+ DW_TAG_enumeration_type = 0x04,
+ DW_TAG_formal_parameter = 0x05,
+ DW_TAG_imported_declaration = 0x08,
+ DW_TAG_label = 0x0a,
+ DW_TAG_lexical_block = 0x0b,
+ DW_TAG_member = 0x0d,
+ DW_TAG_pointer_type = 0x0f,
+ DW_TAG_reference_type = 0x10,
+ DW_TAG_compile_unit = 0x11,
+ DW_TAG_string_type = 0x12,
+ DW_TAG_structure_type = 0x13,
+ DW_TAG_subroutine_type = 0x15,
+ DW_TAG_typedef = 0x16,
+ DW_TAG_union_type = 0x17,
+ DW_TAG_unspecified_parameters = 0x18,
+ DW_TAG_variant = 0x19,
+ DW_TAG_common_block = 0x1a,
+ DW_TAG_common_inclusion = 0x1b,
+ DW_TAG_inheritance = 0x1c,
+ DW_TAG_inlined_subroutine = 0x1d,
+ DW_TAG_module = 0x1e,
+ DW_TAG_ptr_to_member_type = 0x1f,
+ DW_TAG_set_type = 0x20,
+ DW_TAG_subrange_type = 0x21,
+ DW_TAG_with_stmt = 0x22,
+ DW_TAG_access_declaration = 0x23,
+ DW_TAG_base_type = 0x24,
+ DW_TAG_catch_block = 0x25,
+ DW_TAG_const_type = 0x26,
+ DW_TAG_constant = 0x27,
+ DW_TAG_enumerator = 0x28,
+ DW_TAG_file_type = 0x29,
+ DW_TAG_friend = 0x2a,
+ DW_TAG_namelist = 0x2b,
+ DW_TAG_namelist_item = 0x2c,
+ DW_TAG_packed_type = 0x2d,
+ DW_TAG_subprogram = 0x2e,
+ DW_TAG_template_type_param = 0x2f,
+ DW_TAG_template_value_param = 0x30,
+ DW_TAG_thrown_type = 0x31,
+ DW_TAG_try_block = 0x32,
+ DW_TAG_variant_part = 0x33,
+ DW_TAG_variable = 0x34,
+ DW_TAG_volatile_type = 0x35,
+ /* DWARF 3. */
+ DW_TAG_dwarf_procedure = 0x36,
+ DW_TAG_restrict_type = 0x37,
+ DW_TAG_interface_type = 0x38,
+ DW_TAG_namespace = 0x39,
+ DW_TAG_imported_module = 0x3a,
+ DW_TAG_unspecified_type = 0x3b,
+ DW_TAG_partial_unit = 0x3c,
+ DW_TAG_imported_unit = 0x3d,
+ /* SGI/MIPS Extensions. */
+ DW_TAG_MIPS_loop = 0x4081,
+ /* HP extensions. See: ftp://ftp.hp.com/pub/lang/tools/WDB/wdb-4.0.tar.gz . */
+ DW_TAG_HP_array_descriptor = 0x4090,
+ /* GNU extensions. */
+ DW_TAG_format_label = 0x4101, /* For FORTRAN 77 and Fortran 90. */
+ DW_TAG_function_template = 0x4102, /* For C++. */
+ DW_TAG_class_template = 0x4103, /* For C++. */
+ DW_TAG_GNU_BINCL = 0x4104,
+ DW_TAG_GNU_EINCL = 0x4105,
+ /* Extensions for UPC. See: http://upc.gwu.edu/~upc. */
+ DW_TAG_upc_shared_type = 0x8765,
+ DW_TAG_upc_strict_type = 0x8766,
+ DW_TAG_upc_relaxed_type = 0x8767,
+ /* PGI (STMicroelectronics) extensions. No documentation available. */
+ DW_TAG_PGI_kanji_type = 0xA000,
+ DW_TAG_PGI_interface_block = 0xA020
+ };
+
+#define DW_TAG_lo_user 0x4080
+#define DW_TAG_hi_user 0xffff
+
+/* Flag that tells whether entry has a child or not. */
+#define DW_children_no 0
+#define DW_children_yes 1
+
+/* Form names and codes. */
+enum dwarf_form
+ {
+ DW_FORM_addr = 0x01,
+ DW_FORM_block2 = 0x03,
+ DW_FORM_block4 = 0x04,
+ DW_FORM_data2 = 0x05,
+ DW_FORM_data4 = 0x06,
+ DW_FORM_data8 = 0x07,
+ DW_FORM_string = 0x08,
+ DW_FORM_block = 0x09,
+ DW_FORM_block1 = 0x0a,
+ DW_FORM_data1 = 0x0b,
+ DW_FORM_flag = 0x0c,
+ DW_FORM_sdata = 0x0d,
+ DW_FORM_strp = 0x0e,
+ DW_FORM_udata = 0x0f,
+ DW_FORM_ref_addr = 0x10,
+ DW_FORM_ref1 = 0x11,
+ DW_FORM_ref2 = 0x12,
+ DW_FORM_ref4 = 0x13,
+ DW_FORM_ref8 = 0x14,
+ DW_FORM_ref_udata = 0x15,
+ DW_FORM_indirect = 0x16
+ };
+
+/* Attribute names and codes. */
+enum dwarf_attribute
+ {
+ DW_AT_sibling = 0x01,
+ DW_AT_location = 0x02,
+ DW_AT_name = 0x03,
+ DW_AT_ordering = 0x09,
+ DW_AT_subscr_data = 0x0a,
+ DW_AT_byte_size = 0x0b,
+ DW_AT_bit_offset = 0x0c,
+ DW_AT_bit_size = 0x0d,
+ DW_AT_element_list = 0x0f,
+ DW_AT_stmt_list = 0x10,
+ DW_AT_low_pc = 0x11,
+ DW_AT_high_pc = 0x12,
+ DW_AT_language = 0x13,
+ DW_AT_member = 0x14,
+ DW_AT_discr = 0x15,
+ DW_AT_discr_value = 0x16,
+ DW_AT_visibility = 0x17,
+ DW_AT_import = 0x18,
+ DW_AT_string_length = 0x19,
+ DW_AT_common_reference = 0x1a,
+ DW_AT_comp_dir = 0x1b,
+ DW_AT_const_value = 0x1c,
+ DW_AT_containing_type = 0x1d,
+ DW_AT_default_value = 0x1e,
+ DW_AT_inline = 0x20,
+ DW_AT_is_optional = 0x21,
+ DW_AT_lower_bound = 0x22,
+ DW_AT_producer = 0x25,
+ DW_AT_prototyped = 0x27,
+ DW_AT_return_addr = 0x2a,
+ DW_AT_start_scope = 0x2c,
+ DW_AT_stride_size = 0x2e,
+ DW_AT_upper_bound = 0x2f,
+ DW_AT_abstract_origin = 0x31,
+ DW_AT_accessibility = 0x32,
+ DW_AT_address_class = 0x33,
+ DW_AT_artificial = 0x34,
+ DW_AT_base_types = 0x35,
+ DW_AT_calling_convention = 0x36,
+ DW_AT_count = 0x37,
+ DW_AT_data_member_location = 0x38,
+ DW_AT_decl_column = 0x39,
+ DW_AT_decl_file = 0x3a,
+ DW_AT_decl_line = 0x3b,
+ DW_AT_declaration = 0x3c,
+ DW_AT_discr_list = 0x3d,
+ DW_AT_encoding = 0x3e,
+ DW_AT_external = 0x3f,
+ DW_AT_frame_base = 0x40,
+ DW_AT_friend = 0x41,
+ DW_AT_identifier_case = 0x42,
+ DW_AT_macro_info = 0x43,
+ DW_AT_namelist_items = 0x44,
+ DW_AT_priority = 0x45,
+ DW_AT_segment = 0x46,
+ DW_AT_specification = 0x47,
+ DW_AT_static_link = 0x48,
+ DW_AT_type = 0x49,
+ DW_AT_use_location = 0x4a,
+ DW_AT_variable_parameter = 0x4b,
+ DW_AT_virtuality = 0x4c,
+ DW_AT_vtable_elem_location = 0x4d,
+ /* DWARF 3 values. */
+ DW_AT_allocated = 0x4e,
+ DW_AT_associated = 0x4f,
+ DW_AT_data_location = 0x50,
+ DW_AT_stride = 0x51,
+ DW_AT_entry_pc = 0x52,
+ DW_AT_use_UTF8 = 0x53,
+ DW_AT_extension = 0x54,
+ DW_AT_ranges = 0x55,
+ DW_AT_trampoline = 0x56,
+ DW_AT_call_column = 0x57,
+ DW_AT_call_file = 0x58,
+ DW_AT_call_line = 0x59,
+ /* SGI/MIPS extensions. */
+ DW_AT_MIPS_fde = 0x2001,
+ DW_AT_MIPS_loop_begin = 0x2002,
+ DW_AT_MIPS_tail_loop_begin = 0x2003,
+ DW_AT_MIPS_epilog_begin = 0x2004,
+ DW_AT_MIPS_loop_unroll_factor = 0x2005,
+ DW_AT_MIPS_software_pipeline_depth = 0x2006,
+ DW_AT_MIPS_linkage_name = 0x2007,
+ DW_AT_MIPS_stride = 0x2008,
+ DW_AT_MIPS_abstract_name = 0x2009,
+ DW_AT_MIPS_clone_origin = 0x200a,
+ DW_AT_MIPS_has_inlines = 0x200b,
+ /* HP extensions. */
+ DW_AT_HP_block_index = 0x2000,
+ DW_AT_HP_unmodifiable = 0x2001, /* Same as DW_AT_MIPS_fde. */
+ DW_AT_HP_actuals_stmt_list = 0x2010,
+ DW_AT_HP_proc_per_section = 0x2011,
+ DW_AT_HP_raw_data_ptr = 0x2012,
+ DW_AT_HP_pass_by_reference = 0x2013,
+ DW_AT_HP_opt_level = 0x2014,
+ DW_AT_HP_prof_version_id = 0x2015,
+ DW_AT_HP_opt_flags = 0x2016,
+ DW_AT_HP_cold_region_low_pc = 0x2017,
+ DW_AT_HP_cold_region_high_pc = 0x2018,
+ DW_AT_HP_all_variables_modifiable = 0x2019,
+ DW_AT_HP_linkage_name = 0x201a,
+ DW_AT_HP_prof_flags = 0x201b, /* In comp unit of procs_info for -g. */
+ /* GNU extensions. */
+ DW_AT_sf_names = 0x2101,
+ DW_AT_src_info = 0x2102,
+ DW_AT_mac_info = 0x2103,
+ DW_AT_src_coords = 0x2104,
+ DW_AT_body_begin = 0x2105,
+ DW_AT_body_end = 0x2106,
+ DW_AT_GNU_vector = 0x2107,
+ /* VMS extensions. */
+ DW_AT_VMS_rtnbeg_pd_address = 0x2201,
+ /* UPC extension. */
+ DW_AT_upc_threads_scaled = 0x3210,
+ /* PGI (STMicroelectronics) extensions. */
+ DW_AT_PGI_lbase = 0x3a00,
+ DW_AT_PGI_soffset = 0x3a01,
+ DW_AT_PGI_lstride = 0x3a02
+ };
+
+#define DW_AT_lo_user 0x2000 /* Implementation-defined range start. */
+#define DW_AT_hi_user 0x3ff0 /* Implementation-defined range end. */
+
+/* Location atom names and codes. */
+enum dwarf_location_atom
+ {
+ DW_OP_addr = 0x03,
+ DW_OP_deref = 0x06,
+ DW_OP_const1u = 0x08,
+ DW_OP_const1s = 0x09,
+ DW_OP_const2u = 0x0a,
+ DW_OP_const2s = 0x0b,
+ DW_OP_const4u = 0x0c,
+ DW_OP_const4s = 0x0d,
+ DW_OP_const8u = 0x0e,
+ DW_OP_const8s = 0x0f,
+ DW_OP_constu = 0x10,
+ DW_OP_consts = 0x11,
+ DW_OP_dup = 0x12,
+ DW_OP_drop = 0x13,
+ DW_OP_over = 0x14,
+ DW_OP_pick = 0x15,
+ DW_OP_swap = 0x16,
+ DW_OP_rot = 0x17,
+ DW_OP_xderef = 0x18,
+ DW_OP_abs = 0x19,
+ DW_OP_and = 0x1a,
+ DW_OP_div = 0x1b,
+ DW_OP_minus = 0x1c,
+ DW_OP_mod = 0x1d,
+ DW_OP_mul = 0x1e,
+ DW_OP_neg = 0x1f,
+ DW_OP_not = 0x20,
+ DW_OP_or = 0x21,
+ DW_OP_plus = 0x22,
+ DW_OP_plus_uconst = 0x23,
+ DW_OP_shl = 0x24,
+ DW_OP_shr = 0x25,
+ DW_OP_shra = 0x26,
+ DW_OP_xor = 0x27,
+ DW_OP_bra = 0x28,
+ DW_OP_eq = 0x29,
+ DW_OP_ge = 0x2a,
+ DW_OP_gt = 0x2b,
+ DW_OP_le = 0x2c,
+ DW_OP_lt = 0x2d,
+ DW_OP_ne = 0x2e,
+ DW_OP_skip = 0x2f,
+ DW_OP_lit0 = 0x30,
+ DW_OP_lit1 = 0x31,
+ DW_OP_lit2 = 0x32,
+ DW_OP_lit3 = 0x33,
+ DW_OP_lit4 = 0x34,
+ DW_OP_lit5 = 0x35,
+ DW_OP_lit6 = 0x36,
+ DW_OP_lit7 = 0x37,
+ DW_OP_lit8 = 0x38,
+ DW_OP_lit9 = 0x39,
+ DW_OP_lit10 = 0x3a,
+ DW_OP_lit11 = 0x3b,
+ DW_OP_lit12 = 0x3c,
+ DW_OP_lit13 = 0x3d,
+ DW_OP_lit14 = 0x3e,
+ DW_OP_lit15 = 0x3f,
+ DW_OP_lit16 = 0x40,
+ DW_OP_lit17 = 0x41,
+ DW_OP_lit18 = 0x42,
+ DW_OP_lit19 = 0x43,
+ DW_OP_lit20 = 0x44,
+ DW_OP_lit21 = 0x45,
+ DW_OP_lit22 = 0x46,
+ DW_OP_lit23 = 0x47,
+ DW_OP_lit24 = 0x48,
+ DW_OP_lit25 = 0x49,
+ DW_OP_lit26 = 0x4a,
+ DW_OP_lit27 = 0x4b,
+ DW_OP_lit28 = 0x4c,
+ DW_OP_lit29 = 0x4d,
+ DW_OP_lit30 = 0x4e,
+ DW_OP_lit31 = 0x4f,
+ DW_OP_reg0 = 0x50,
+ DW_OP_reg1 = 0x51,
+ DW_OP_reg2 = 0x52,
+ DW_OP_reg3 = 0x53,
+ DW_OP_reg4 = 0x54,
+ DW_OP_reg5 = 0x55,
+ DW_OP_reg6 = 0x56,
+ DW_OP_reg7 = 0x57,
+ DW_OP_reg8 = 0x58,
+ DW_OP_reg9 = 0x59,
+ DW_OP_reg10 = 0x5a,
+ DW_OP_reg11 = 0x5b,
+ DW_OP_reg12 = 0x5c,
+ DW_OP_reg13 = 0x5d,
+ DW_OP_reg14 = 0x5e,
+ DW_OP_reg15 = 0x5f,
+ DW_OP_reg16 = 0x60,
+ DW_OP_reg17 = 0x61,
+ DW_OP_reg18 = 0x62,
+ DW_OP_reg19 = 0x63,
+ DW_OP_reg20 = 0x64,
+ DW_OP_reg21 = 0x65,
+ DW_OP_reg22 = 0x66,
+ DW_OP_reg23 = 0x67,
+ DW_OP_reg24 = 0x68,
+ DW_OP_reg25 = 0x69,
+ DW_OP_reg26 = 0x6a,
+ DW_OP_reg27 = 0x6b,
+ DW_OP_reg28 = 0x6c,
+ DW_OP_reg29 = 0x6d,
+ DW_OP_reg30 = 0x6e,
+ DW_OP_reg31 = 0x6f,
+ DW_OP_breg0 = 0x70,
+ DW_OP_breg1 = 0x71,
+ DW_OP_breg2 = 0x72,
+ DW_OP_breg3 = 0x73,
+ DW_OP_breg4 = 0x74,
+ DW_OP_breg5 = 0x75,
+ DW_OP_breg6 = 0x76,
+ DW_OP_breg7 = 0x77,
+ DW_OP_breg8 = 0x78,
+ DW_OP_breg9 = 0x79,
+ DW_OP_breg10 = 0x7a,
+ DW_OP_breg11 = 0x7b,
+ DW_OP_breg12 = 0x7c,
+ DW_OP_breg13 = 0x7d,
+ DW_OP_breg14 = 0x7e,
+ DW_OP_breg15 = 0x7f,
+ DW_OP_breg16 = 0x80,
+ DW_OP_breg17 = 0x81,
+ DW_OP_breg18 = 0x82,
+ DW_OP_breg19 = 0x83,
+ DW_OP_breg20 = 0x84,
+ DW_OP_breg21 = 0x85,
+ DW_OP_breg22 = 0x86,
+ DW_OP_breg23 = 0x87,
+ DW_OP_breg24 = 0x88,
+ DW_OP_breg25 = 0x89,
+ DW_OP_breg26 = 0x8a,
+ DW_OP_breg27 = 0x8b,
+ DW_OP_breg28 = 0x8c,
+ DW_OP_breg29 = 0x8d,
+ DW_OP_breg30 = 0x8e,
+ DW_OP_breg31 = 0x8f,
+ DW_OP_regx = 0x90,
+ DW_OP_fbreg = 0x91,
+ DW_OP_bregx = 0x92,
+ DW_OP_piece = 0x93,
+ DW_OP_deref_size = 0x94,
+ DW_OP_xderef_size = 0x95,
+ DW_OP_nop = 0x96,
+ /* DWARF 3 extensions. */
+ DW_OP_push_object_address = 0x97,
+ DW_OP_call2 = 0x98,
+ DW_OP_call4 = 0x99,
+ DW_OP_call_ref = 0x9a,
+ /* GNU extensions. */
+ DW_OP_GNU_push_tls_address = 0xe0,
+ /* HP extensions. */
+ DW_OP_HP_unknown = 0xe0, /* Ouch, the same as GNU_push_tls_address. */
+ DW_OP_HP_is_value = 0xe1,
+ DW_OP_HP_fltconst4 = 0xe2,
+ DW_OP_HP_fltconst8 = 0xe3,
+ DW_OP_HP_mod_range = 0xe4,
+ DW_OP_HP_unmod_range = 0xe5,
+ DW_OP_HP_tls = 0xe6
+ };
+
+#define DW_OP_lo_user 0xe0 /* Implementation-defined range start. */
+#define DW_OP_hi_user 0xff /* Implementation-defined range end. */
+
+/* Type encodings. */
+enum dwarf_type
+ {
+ DW_ATE_void = 0x0,
+ DW_ATE_address = 0x1,
+ DW_ATE_boolean = 0x2,
+ DW_ATE_complex_float = 0x3,
+ DW_ATE_float = 0x4,
+ DW_ATE_signed = 0x5,
+ DW_ATE_signed_char = 0x6,
+ DW_ATE_unsigned = 0x7,
+ DW_ATE_unsigned_char = 0x8,
+ /* DWARF 3. */
+ DW_ATE_imaginary_float = 0x9,
+ /* HP extensions. */
+ DW_ATE_HP_float80 = 0x80, /* Floating-point (80 bit). */
+ DW_ATE_HP_complex_float80 = 0x81, /* Complex floating-point (80 bit). */
+ DW_ATE_HP_float128 = 0x82, /* Floating-point (128 bit). */
+ DW_ATE_HP_complex_float128 = 0x83, /* Complex floating-point (128 bit). */
+ DW_ATE_HP_floathpintel = 0x84, /* Floating-point (82 bit IA64). */
+ DW_ATE_HP_imaginary_float80 = 0x85,
+ DW_ATE_HP_imaginary_float128 = 0x86
+ };
+
+#define DW_ATE_lo_user 0x80
+#define DW_ATE_hi_user 0xff
+
+/* Array ordering names and codes. */
+enum dwarf_array_dim_ordering
+ {
+ DW_ORD_row_major = 0,
+ DW_ORD_col_major = 1
+ };
+
+/* Access attribute. */
+enum dwarf_access_attribute
+ {
+ DW_ACCESS_public = 1,
+ DW_ACCESS_protected = 2,
+ DW_ACCESS_private = 3
+ };
+
+/* Visibility. */
+enum dwarf_visibility_attribute
+ {
+ DW_VIS_local = 1,
+ DW_VIS_exported = 2,
+ DW_VIS_qualified = 3
+ };
+
+/* Virtuality. */
+enum dwarf_virtuality_attribute
+ {
+ DW_VIRTUALITY_none = 0,
+ DW_VIRTUALITY_virtual = 1,
+ DW_VIRTUALITY_pure_virtual = 2
+ };
+
+/* Case sensitivity. */
+enum dwarf_id_case
+ {
+ DW_ID_case_sensitive = 0,
+ DW_ID_up_case = 1,
+ DW_ID_down_case = 2,
+ DW_ID_case_insensitive = 3
+ };
+
+/* Calling convention. */
+enum dwarf_calling_convention
+ {
+ DW_CC_normal = 0x1,
+ DW_CC_program = 0x2,
+ DW_CC_nocall = 0x3
+ };
+
+#define DW_CC_lo_user 0x40
+#define DW_CC_hi_user 0xff
+
+/* Inline attribute. */
+enum dwarf_inline_attribute
+ {
+ DW_INL_not_inlined = 0,
+ DW_INL_inlined = 1,
+ DW_INL_declared_not_inlined = 2,
+ DW_INL_declared_inlined = 3
+ };
+
+/* Discriminant lists. */
+enum dwarf_discrim_list
+ {
+ DW_DSC_label = 0,
+ DW_DSC_range = 1
+ };
+
+/* Line number opcodes. */
+enum dwarf_line_number_ops
+ {
+ DW_LNS_extended_op = 0,
+ DW_LNS_copy = 1,
+ DW_LNS_advance_pc = 2,
+ DW_LNS_advance_line = 3,
+ DW_LNS_set_file = 4,
+ DW_LNS_set_column = 5,
+ DW_LNS_negate_stmt = 6,
+ DW_LNS_set_basic_block = 7,
+ DW_LNS_const_add_pc = 8,
+ DW_LNS_fixed_advance_pc = 9,
+ /* DWARF 3. */
+ DW_LNS_set_prologue_end = 10,
+ DW_LNS_set_epilogue_begin = 11,
+ DW_LNS_set_isa = 12
+ };
+
+/* Line number extended opcodes. */
+enum dwarf_line_number_x_ops
+ {
+ DW_LNE_end_sequence = 1,
+ DW_LNE_set_address = 2,
+ DW_LNE_define_file = 3,
+ /* HP extensions. */
+ DW_LNE_HP_negate_is_UV_update = 0x11,
+ DW_LNE_HP_push_context = 0x12,
+ DW_LNE_HP_pop_context = 0x13,
+ DW_LNE_HP_set_file_line_column = 0x14,
+ DW_LNE_HP_set_routine_name = 0x15,
+ DW_LNE_HP_set_sequence = 0x16,
+ DW_LNE_HP_negate_post_semantics = 0x17,
+ DW_LNE_HP_negate_function_exit = 0x18,
+ DW_LNE_HP_negate_front_end_logical = 0x19,
+ DW_LNE_HP_define_proc = 0x20
+ };
+
+/* Call frame information. */
+enum dwarf_call_frame_info
+ {
+ DW_CFA_advance_loc = 0x40,
+ DW_CFA_offset = 0x80,
+ DW_CFA_restore = 0xc0,
+ DW_CFA_nop = 0x00,
+ DW_CFA_set_loc = 0x01,
+ DW_CFA_advance_loc1 = 0x02,
+ DW_CFA_advance_loc2 = 0x03,
+ DW_CFA_advance_loc4 = 0x04,
+ DW_CFA_offset_extended = 0x05,
+ DW_CFA_restore_extended = 0x06,
+ DW_CFA_undefined = 0x07,
+ DW_CFA_same_value = 0x08,
+ DW_CFA_register = 0x09,
+ DW_CFA_remember_state = 0x0a,
+ DW_CFA_restore_state = 0x0b,
+ DW_CFA_def_cfa = 0x0c,
+ DW_CFA_def_cfa_register = 0x0d,
+ DW_CFA_def_cfa_offset = 0x0e,
+ /* DWARF 3. */
+ DW_CFA_def_cfa_expression = 0x0f,
+ DW_CFA_expression = 0x10,
+ DW_CFA_offset_extended_sf = 0x11,
+ DW_CFA_def_cfa_sf = 0x12,
+ DW_CFA_def_cfa_offset_sf = 0x13,
+ /* SGI/MIPS specific. */
+ DW_CFA_MIPS_advance_loc8 = 0x1d,
+ /* GNU extensions. */
+ DW_CFA_GNU_window_save = 0x2d,
+ DW_CFA_GNU_args_size = 0x2e,
+ DW_CFA_GNU_negative_offset_extended = 0x2f
+ };
+
+#define DW_CIE_ID 0xffffffff
+#define DW_CIE_VERSION 1
+
+#define DW_CFA_extended 0
+#define DW_CFA_lo_user 0x1c
+#define DW_CFA_hi_user 0x3f
+
+#define DW_CHILDREN_no 0x00
+#define DW_CHILDREN_yes 0x01
+
+#define DW_ADDR_none 0
+
+/* Source language names and codes. */
+enum dwarf_source_language
+ {
+ DW_LANG_C89 = 0x0001,
+ DW_LANG_C = 0x0002,
+ DW_LANG_Ada83 = 0x0003,
+ DW_LANG_C_plus_plus = 0x0004,
+ DW_LANG_Cobol74 = 0x0005,
+ DW_LANG_Cobol85 = 0x0006,
+ DW_LANG_Fortran77 = 0x0007,
+ DW_LANG_Fortran90 = 0x0008,
+ DW_LANG_Pascal83 = 0x0009,
+ DW_LANG_Modula2 = 0x000a,
+ DW_LANG_Java = 0x000b,
+ /* DWARF 3. */
+ DW_LANG_C99 = 0x000c,
+ DW_LANG_Ada95 = 0x000d,
+ DW_LANG_Fortran95 = 0x000e,
+ /* MIPS. */
+ DW_LANG_Mips_Assembler = 0x8001,
+ /* UPC. */
+ DW_LANG_Upc = 0x8765
+ };
+
+#define DW_LANG_lo_user 0x8000 /* Implementation-defined range start. */
+#define DW_LANG_hi_user 0xffff /* Implementation-defined range start. */
+
+/* Names and codes for macro information. */
+enum dwarf_macinfo_record_type
+ {
+ DW_MACINFO_define = 1,
+ DW_MACINFO_undef = 2,
+ DW_MACINFO_start_file = 3,
+ DW_MACINFO_end_file = 4,
+ DW_MACINFO_vendor_ext = 255
+ };
+\f
+/* @@@ For use with GNU frame unwind information. */
+
+#define DW_EH_PE_absptr 0x00
+#define DW_EH_PE_omit 0xff
+
+#define DW_EH_PE_uleb128 0x01
+#define DW_EH_PE_udata2 0x02
+#define DW_EH_PE_udata4 0x03
+#define DW_EH_PE_udata8 0x04
+#define DW_EH_PE_sleb128 0x09
+#define DW_EH_PE_sdata2 0x0A
+#define DW_EH_PE_sdata4 0x0B
+#define DW_EH_PE_sdata8 0x0C
+#define DW_EH_PE_signed 0x08
+
+#define DW_EH_PE_pcrel 0x10
+#define DW_EH_PE_textrel 0x20
+#define DW_EH_PE_datarel 0x30
+#define DW_EH_PE_funcrel 0x40
+#define DW_EH_PE_aligned 0x50
+
+#define DW_EH_PE_indirect 0x80
+
+#endif /* _ELF_DWARF2_H */
Index: linux-2.6.14/include/linux/dwarf2-lang.h
===================================================================
--- /dev/null
+++ linux-2.6.14/include/linux/dwarf2-lang.h
@@ -0,0 +1,300 @@
+#ifndef DWARF2_LANG
+#define DWARF2_LANG
+
+/*
+ * This is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2, or (at your option) any later
+ * version.
+ */
+/*
+ * This file defines macros that allow generation of DWARF debug records
+ * for asm files. This file is platform independent. Register numbers
+ * (which are about the only thing that is platform dependent) are to be
+ * supplied by a platform defined file.
+ */
+/*
+ * We need this to work for both asm and C. In asm we are using the
+ * old comment trick to concatenate while C uses the new ANSI thing.
+ * Here we have concat macro... The multi level thing is to allow and
+ * macros used in the names to be resolved prior to the cat (at which
+ * time they are no longer the same string).
+ */
+#define CAT3(a,b,c) _CAT3(a,b,c)
+#define _CAT3(a,b,c) __CAT3(a,b,c)
+#ifndef __STDC__
+#define __CAT3(a,b,c) a/**/b/**/c
+#else
+#define __CAT3(a,b,c) a##b##c
+#endif
+#ifdef __ASSEMBLY__
+#define IFC(a)
+#define IFN_C(a) a
+#define NL ;
+#define QUOTE_THIS(a) a
+#define DWARF_preamble .section .debug_frame,"",%progbits;
+#else
+#define IFC(a) a
+#define IFN_C(a)
+#define NL \n\t
+#define QUOTE_THIS(a) _QUOTE_THIS(a)
+#define _QUOTE_THIS(a) #a
+/* Don't let CPP see the " and , \042=" \054=, */
+#define DWARF_preamble .section .debug_frame \054\042\042\054%progbits
+#endif
+
+#ifdef CONFIG_64BIT
+#define DATA_ALIGN_FACTOR 8
+#define ADDR_LOC .quad
+#else
+#define DATA_ALIGN_FACTOR 4
+#define ADDR_LOC .long
+#endif
+
+#include <linux/dwarf2-defs.h>
+/*
+ * This macro starts a debug frame section. The debug_frame describes
+ * where to find the registers that the enclosing function saved on
+ * entry.
+ *
+ * ORD is use by the label generator and should be the same as what is
+ * passed to CFI_postamble.
+ *
+ * pc, pc register gdb ordinal.
+ *
+ * code_align this is the factor used to define locations or regions
+ * where the given definitions apply. If you use labels to define these
+ * this should be 1.
+ *
+ * data_align this is the factor used to define register offsets. If
+ * you use struct offset, this should be the size of the register in
+ * bytes or the negative of that. This is how it is used: you will
+ * define a register as the reference register, say the stack pointer,
+ * then you will say where a register is located relative to this
+ * reference registers value, say 40 for register 3 (the gdb register
+ * number). The <40> will be multiplied by <data_align> to define the
+ * byte offset of the given register (3, in this example). So if your
+ * <40> is the byte offset and the reference register points at the
+ * begining, you would want 1 for the data_offset. If <40> was the 40th
+ * 4-byte element in that structure you would want 4. And if your
+ * reference register points at the end of the structure you would want
+ * a negative data_align value(and you would have to do other math as
+ * well).
+ */
+
+#define CFI_preamble(ORD, pc, code_align, data_align) \
+ DWARF_preamble NL \
+ .align DATA_ALIGN_FACTOR NL \
+ .globl CAT3(frame,_,ORD) NL \
+CAT3(frame,_,ORD): NL \
+ .long 7f-6f NL \
+6: \
+ .long DW_CIE_ID NL \
+ .byte DW_CIE_VERSION NL \
+ .byte 0 NL \
+ .uleb128 code_align NL \
+ .sleb128 data_align NL \
+ .byte pc NL
+
+/*
+ * After the above macro and prior to the CFI_postamble, you need to
+ * define the initial state. This starts with defining the reference
+ * register and, usually the pc. Here are some helper macros:
+ */
+
+#define CFA_define_reference(reg, offset) \
+ .byte DW_CFA_def_cfa NL \
+ .uleb128 reg NL \
+ .uleb128 (offset) NL
+
+#define CFA_define_offset(reg, offset) \
+ .byte (DW_CFA_offset + reg) NL \
+ .uleb128 (offset) NL
+
+#define CFA_restore(reg) \
+ .byte (DW_CFA_restore + reg) NL
+
+#define CFI_postamble() \
+ .align DATA_ALIGN_FACTOR NL \
+7: NL \
+.previous NL
+
+/*
+ * So now your code pushs stuff on the stack, you need a new location
+ * and the rules for what to do. This starts a running description of
+ * the call frame. You need to describe what changes with respect to
+ * the call registers as the location of the pc moves through the code.
+ * The following builds an FDE (fram descriptor entry?). Like the
+ * above, it has a preamble and a postamble. It also is tied to the CFI
+ * above.
+ * The preamble macro is tied to the CFI thru the first parameter. The
+ * second is the code start address and then the code end address+1.
+ */
+#define FDE_preamble(ORD, initial_address, end_address) \
+ DWARF_preamble NL \
+ .align DATA_ALIGN_FACTOR NL \
+ .long 9f-8f NL \
+8: \
+ .long CAT3(frame,_,ORD) NL \
+ ADDR_LOC initial_address NL \
+ ADDR_LOC (end_address - initial_address) NL
+
+#define FDE_postamble() \
+ .align DATA_ALIGN_FACTOR NL \
+9: NL \
+.previous NL
+
+/*
+ * That done, you can now add registers, subtract registers, move the
+ * reference and even change the reference. You can also define a new
+ * area of code the info applies to. For discontinuous bits you should
+ * start a new FDE. You may have as many as you like.
+ */
+
+/*
+ * To advance the stack address by <bytes> (0x3f max)
+ */
+
+#define CFA_advance_loc(bytes) \
+ .byte DW_CFA_advance_loc+bytes NL
+
+/*
+ * This one is good for 0xff or 255
+ */
+#define CFA_advance_loc1(bytes) \
+ .byte DW_CFA_advance_loc1 NL \
+ .byte bytes NL
+
+#define CFA_undefine_reg(reg) \
+ .byte DW_CFA_undefined NL \
+ .uleb128 reg NL
+/*
+ * With the above you can define all the register locations. But
+ * suppose the reference register moves... Takes the new offset NOT an
+ * increment. This is how esp is tracked if it is not saved.
+ */
+
+#define CFA_define_cfa_offset(offset) \
+ .byte DW_CFA_def_cfa_offset NL \
+ .uleb128 (offset) NL
+/*
+ * Or suppose you want to use a different reference register...
+ */
+#define CFA_define_cfa_register(reg) \
+ .byte DW_CFA_def_cfa_register NL \
+ .uleb128 reg NL
+
+/*
+ * If you want to mess with the stack pointer, here is the expression.
+ * The stack starts empty.
+ */
+#define CFA_def_cfa_expression \
+ .byte DW_CFA_def_cfa_expression NL \
+ .uleb128 20f-10f NL \
+10: NL
+/*
+ * This expression is to be used for other regs. The stack starts with the
+ * stack address.
+ */
+
+#define CFA_expression(reg) \
+ .byte DW_CFA_expression NL \
+ .uleb128 reg NL \
+ .uleb128 20f-10f NL \
+10: NL
+/*
+ * Here we do the expression stuff. You should code the above followed
+ * by expression OPs followed by CFA_expression_end.
+ */
+
+
+#define CFA_expression_end \
+20: NL
+
+#define CFA_exp_OP_const4s(a) \
+ .byte DW_OP_const4s NL \
+ .long a NL
+
+#define CFA_exp_OP_swap .byte DW_OP_swap NL
+#define CFA_exp_OP_dup .byte DW_OP_dup NL
+#define CFA_exp_OP_drop .byte DW_OP_drop NL
+/*
+ * All these work on the top two elements on the stack, replacing them
+ * with the result. Top comes first where it matters. True is 1, false 0.
+ */
+#define CFA_exp_OP_deref .byte DW_OP_deref NL
+#define CFA_exp_OP_and .byte DW_OP_and NL
+#define CFA_exp_OP_div .byte DW_OP_div NL
+#define CFA_exp_OP_minus .byte DW_OP_minus NL
+#define CFA_exp_OP_mod .byte DW_OP_mod NL
+#define CFA_exp_OP_neg .byte DW_OP_neg NL
+#define CFA_exp_OP_plus .byte DW_OP_plus NL
+#define CFA_exp_OP_not .byte DW_OP_not NL
+#define CFA_exp_OP_or .byte DW_OP_or NL
+#define CFA_exp_OP_xor .byte DW_OP_xor NL
+#define CFA_exp_OP_le .byte DW_OP_le NL
+#define CFA_exp_OP_ge .byte DW_OP_ge NL
+#define CFA_exp_OP_eq .byte DW_OP_eq NL
+#define CFA_exp_OP_lt .byte DW_OP_lt NL
+#define CFA_exp_OP_gt .byte DW_OP_gt NL
+#define CFA_exp_OP_ne .byte DW_OP_ne NL
+/*
+ * These take a parameter as noted
+ */
+/*
+ * Unconditional skip to loc. loc is a label (loc:)
+ */
+#define CFA_exp_OP_skip(loc) \
+ .byte DW_OP_skip NL \
+ .hword loc-.-2 NL
+/*
+ * Conditional skip to loc (TOS != 0, TOS--) (loc is a label)
+ */
+#define CFA_exp_OP_bra(loc) \
+ .byte DW_OP_bra NL \
+ .hword loc-.-2 NL
+
+/*
+ * TOS += no (an unsigned number)
+ */
+#define CFA_exp_OP_plus_uconst(no) \
+ .byte DW_OP_plus_uconst NL \
+ .uleb128 no NL
+
+/*
+ * ++TOS = no (a unsigned number)
+ */
+#define CFA_exp_OP_constu(no) \
+ .byte DW_OP_constu NL \
+ .uleb128 no NL
+/*
+ * ++TOS = no (a signed number)
+ */
+#define CFA_exp_OP_consts(no) \
+ .byte DW_OP_consts NL \
+ .sleb128 no NL
+/*
+ * ++TOS = no (an unsigned byte)
+ */
+#define CFA_exp_OP_const1u(no) \
+ .byte DW_OP_const1u NL \
+ .byte no NL
+
+
+/*
+ * ++TOS = no (a address)
+ */
+#define CFA_exp_OP_addr(no) \
+ .byte DW_OP_addr NL \
+ .long no NL
+
+/*
+ * Push current frames value for "reg" + offset
+ * We take advantage of the opcode assignments to make this a litteral reg
+ * rather than use the DW_OP_bregx opcode.
+ */
+
+#define CFA_exp_OP_breg(reg,offset) \
+ .byte DW_OP_breg0+reg NL \
+ .sleb128 offset NL
+#endif
Index: linux-2.6.14/Makefile
===================================================================
--- linux-2.6.14.orig/Makefile
+++ linux-2.6.14/Makefile
@@ -1316,4 +1316,8 @@ clean := -f $(if $(KBUILD_SRC),$(srctree

endif # skip-makefile

-FORCE:
+include/linux/dwarf2-defs.h: $(srctree)/include/linux/dwarf2.h $(srctree)/scripts/dwarfh.awk
+ mkdir -p include/linux/
+ awk -f $(srctree)/scripts/dwarfh.awk $(srctree)/include/linux/dwarf2.h > include/linux/dwarf2-defs.h
+
+FORCE: include/linux/dwarf2-defs.h
Index: linux-2.6.14/scripts/dwarfh.awk
===================================================================
--- /dev/null
+++ linux-2.6.14/scripts/dwarfh.awk
@@ -0,0 +1,19 @@
+BEGIN {
+ print "#ifndef _ELF_DWARF_H"
+ print "/* Machine generated from dwarf2.h by scripts/dwarfh.awk */"
+}
+$2 == "=" {
+ gsub(/,/, "", $3)
+ print "#define " $1 "\t " $3
+}
+$1 == "#define" {
+ print $0
+ while( index($0,"\\") == length($0)){
+ getline
+ print $0
+ }
+}
+/.*/ {}
+END {
+ print "#endif"
+}

--
Tom