blob: b1f748cdd9767d20067f8677159b5b27937f9a52 [file] [log] [blame]
/* Output Dwarf2 format symbol table information from the GNU C compiler.
Copyright (C) 1992, 1993, 1995, 1996, 1997 Free Software Foundation, Inc.
Contributed by Gary Funck (gary@intrepid.com).
Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com).
Extensively modified by Jason Merrill (jason@cygnus.com).
This file is part of GNU CC.
GNU CC 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.
GNU CC 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 GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* The first part of this file deals with the DWARF 2 frame unwind
information, which is also used by the GCC efficient exception handling
mechanism. The second part, controlled only by an #ifdef
DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging
information. */
#include "config.h"
#include "defaults.h"
#include <stdio.h>
#include "tree.h"
#include "flags.h"
#include "rtl.h"
#include "hard-reg-set.h"
#include "regs.h"
#include "insn-config.h"
#include "reload.h"
#include "output.h"
#include "expr.h"
#include "except.h"
#include "dwarf2.h"
/* We cannot use <assert.h> in GCC source, since that would include
GCC's assert.h, which may not be compatible with the host compiler. */
#undef assert
#ifdef NDEBUG
# define assert(e)
#else
# define assert(e) do { if (! (e)) abort (); } while (0)
#endif
/* Decide whether we want to emit frame unwind information for the current
translation unit. */
int
dwarf2out_do_frame ()
{
return (write_symbols == DWARF2_DEBUG
#ifdef DWARF2_UNWIND_INFO
|| (flag_exceptions && ! exceptions_via_longjmp)
#endif
);
}
#if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
#ifndef __GNUC__
#define inline
#endif
/* How to start an assembler comment. */
#ifndef ASM_COMMENT_START
#define ASM_COMMENT_START ";#"
#endif
typedef struct dw_cfi_struct *dw_cfi_ref;
typedef struct dw_fde_struct *dw_fde_ref;
typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref;
/* Call frames are described using a sequence of Call Frame
Information instructions. The register number, offset
and address fields are provided as possible operands;
their use is selected by the opcode field. */
typedef union dw_cfi_oprnd_struct
{
unsigned long dw_cfi_reg_num;
long int dw_cfi_offset;
char *dw_cfi_addr;
}
dw_cfi_oprnd;
typedef struct dw_cfi_struct
{
dw_cfi_ref dw_cfi_next;
enum dwarf_call_frame_info dw_cfi_opc;
dw_cfi_oprnd dw_cfi_oprnd1;
dw_cfi_oprnd dw_cfi_oprnd2;
}
dw_cfi_node;
/* All call frame descriptions (FDE's) in the GCC generated DWARF
refer to a single Common Information Entry (CIE), defined at
the beginning of the .debug_frame section. This used of a single
CIE obviates the need to keep track of multiple CIE's
in the DWARF generation routines below. */
typedef struct dw_fde_struct
{
char *dw_fde_begin;
char *dw_fde_current_label;
char *dw_fde_end;
dw_cfi_ref dw_fde_cfi;
}
dw_fde_node;
/* Maximum size (in bytes) of an artificially generated label. */
#define MAX_ARTIFICIAL_LABEL_BYTES 30
/* Make sure we know the sizes of the various types dwarf can describe. These
are only defaults. If the sizes are different for your target, you should
override these values by defining the appropriate symbols in your tm.h
file. */
#ifndef CHAR_TYPE_SIZE
#define CHAR_TYPE_SIZE BITS_PER_UNIT
#endif
#ifndef PTR_SIZE
#define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
#endif
/* The size in bytes of a DWARF field indicating an offset or length
relative to a debug info section, specified to be 4 bytes in the DWARF-2
specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
#ifndef DWARF_OFFSET_SIZE
#define DWARF_OFFSET_SIZE 4
#endif
#define DWARF_VERSION 2
/* Round SIZE up to the nearest BOUNDARY. */
#define DWARF_ROUND(SIZE,BOUNDARY) \
(((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
/* Offsets recorded in opcodes are a multiple of this alignment factor. */
#ifdef STACK_GROWS_DOWNWARD
#define DWARF_CIE_DATA_ALIGNMENT (-UNITS_PER_WORD)
#else
#define DWARF_CIE_DATA_ALIGNMENT UNITS_PER_WORD
#endif
/* A pointer to the base of a table that contains frame description
information for each routine. */
static dw_fde_ref fde_table;
/* Number of elements currently allocated for fde_table. */
static unsigned fde_table_allocated;
/* Number of elements in fde_table currently in use. */
static unsigned fde_table_in_use;
/* Size (in elements) of increments by which we may expand the
fde_table. */
#define FDE_TABLE_INCREMENT 256
/* A list of call frame insns for the CIE. */
static dw_cfi_ref cie_cfi_head;
/* The number of the current function definition for which debugging
information is being generated. These numbers range from 1 up to the
maximum number of function definitions contained within the current
compilation unit. These numbers are used to create unique label id's
unique to each function definition. */
static unsigned current_funcdef_number = 0;
/* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
attribute that accelerates the lookup of the FDE associated
with the subprogram. This variable holds the table index of the FDE
associated with the current function (body) definition. */
static unsigned current_funcdef_fde;
/* Forward declarations for functions defined in this file. */
static char *stripattributes PROTO((char *));
static char *dwarf_cfi_name PROTO((unsigned));
static dw_cfi_ref new_cfi PROTO((void));
static void add_cfi PROTO((dw_cfi_ref *, dw_cfi_ref));
static unsigned long size_of_uleb128 PROTO((unsigned long));
static unsigned long size_of_sleb128 PROTO((long));
static void output_uleb128 PROTO((unsigned long));
static void output_sleb128 PROTO((long));
static void add_fde_cfi PROTO((char *, dw_cfi_ref));
static void lookup_cfa_1 PROTO((dw_cfi_ref, unsigned long *,
long *));
static void lookup_cfa PROTO((unsigned long *, long *));
static void reg_save PROTO((char *, unsigned, unsigned,
long));
static void initial_return_save PROTO((rtx));
static void output_cfi PROTO((dw_cfi_ref, dw_fde_ref));
static void output_call_frame_info PROTO((int));
static unsigned reg_number PROTO((rtx));
/* Definitions of defaults for assembler-dependent names of various
pseudo-ops and section names.
Theses may be overridden in the tm.h file (if necessary) for a particular
assembler. */
#ifdef OBJECT_FORMAT_ELF
#ifndef UNALIGNED_SHORT_ASM_OP
#define UNALIGNED_SHORT_ASM_OP ".2byte"
#endif
#ifndef UNALIGNED_INT_ASM_OP
#define UNALIGNED_INT_ASM_OP ".4byte"
#endif
#ifndef UNALIGNED_DOUBLE_INT_ASM_OP
#define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
#endif
#endif /* OBJECT_FORMAT_ELF */
#ifndef ASM_BYTE_OP
#define ASM_BYTE_OP ".byte"
#endif
/* Data and reference forms for relocatable data. */
#define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
#define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
/* Pseudo-op for defining a new section. */
#ifndef SECTION_ASM_OP
#define SECTION_ASM_OP ".section"
#endif
/* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
print the SECTION_ASM_OP and the section name. The default here works for
almost all svr4 assemblers, except for the sparc, where the section name
must be enclosed in double quotes. (See sparcv4.h). */
#ifndef SECTION_FORMAT
#ifdef PUSHSECTION_FORMAT
#define SECTION_FORMAT PUSHSECTION_FORMAT
#else
#define SECTION_FORMAT "\t%s\t%s\n"
#endif
#endif
#ifndef FRAME_SECTION
#define FRAME_SECTION ".debug_frame"
#endif
#ifndef FUNC_BEGIN_LABEL
#define FUNC_BEGIN_LABEL "LFB"
#endif
#ifndef FUNC_END_LABEL
#define FUNC_END_LABEL "LFE"
#endif
#define CIE_AFTER_SIZE_LABEL "LSCIE"
#define CIE_END_LABEL "LECIE"
#define CIE_LENGTH_LABEL "LLCIE"
#define FDE_AFTER_SIZE_LABEL "LSFDE"
#define FDE_END_LABEL "LEFDE"
#define FDE_LENGTH_LABEL "LLFDE"
/* Definitions of defaults for various types of primitive assembly language
output operations. These may be overridden from within the tm.h file,
but typically, that is unnecessary. */
#ifndef ASM_OUTPUT_SECTION
#define ASM_OUTPUT_SECTION(FILE, SECTION) \
fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
#endif
#ifndef ASM_OUTPUT_DWARF_DATA1
#define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, VALUE)
#endif
#ifdef UNALIGNED_INT_ASM_OP
#ifndef UNALIGNED_OFFSET_ASM_OP
#define UNALIGNED_OFFSET_ASM_OP \
(DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
#endif
#ifndef UNALIGNED_WORD_ASM_OP
#define UNALIGNED_WORD_ASM_OP \
(PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
#endif
#ifndef ASM_OUTPUT_DWARF_DELTA2
#define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
assemble_name (FILE, LABEL1); \
fprintf (FILE, "-"); \
assemble_name (FILE, LABEL2); \
} while (0)
#endif
#ifndef ASM_OUTPUT_DWARF_DELTA4
#define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
assemble_name (FILE, LABEL1); \
fprintf (FILE, "-"); \
assemble_name (FILE, LABEL2); \
} while (0)
#endif
#ifndef ASM_OUTPUT_DWARF_DELTA
#define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
assemble_name (FILE, LABEL1); \
fprintf (FILE, "-"); \
assemble_name (FILE, LABEL2); \
} while (0)
#endif
#ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
#define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
assemble_name (FILE, LABEL1); \
fprintf (FILE, "-"); \
assemble_name (FILE, LABEL2); \
} while (0)
#endif
#ifndef ASM_OUTPUT_DWARF_ADDR
#define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
assemble_name (FILE, LABEL); \
} while (0)
#endif
#ifndef ASM_OUTPUT_DWARF_ADDR_CONST
#define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
#endif
#ifndef ASM_OUTPUT_DWARF_OFFSET
#define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
assemble_name (FILE, LABEL); \
} while (0)
#endif
#ifndef ASM_OUTPUT_DWARF_DATA2
#define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) VALUE)
#endif
#ifndef ASM_OUTPUT_DWARF_DATA4
#define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) VALUE)
#endif
#ifndef ASM_OUTPUT_DWARF_DATA
#define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
(unsigned long) VALUE)
#endif
#ifndef ASM_OUTPUT_DWARF_ADDR_DATA
#define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
(unsigned long) VALUE)
#endif
#ifndef ASM_OUTPUT_DWARF_DATA8
#define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
do { \
if (WORDS_BIG_ENDIAN) \
{ \
fprintf ((FILE), "\t%s\t0x%x\n", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
} \
else \
{ \
fprintf ((FILE), "\t%s\t0x%x\n", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
} \
} while (0)
#endif
#ifndef ASM_OUTPUT_DWARF_VALUE4
#define ASM_OUTPUT_DWARF_VALUE4(FILE,LABEL) \
do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
assemble_name (FILE, LABEL); \
} while (0)
#endif
#else /* UNALIGNED_INT_ASM_OP */
/* We don't have unaligned support, let's hope the normal output works for
.debug_frame. */
#define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
assemble_integer (gen_rtx (SYMBOL_REF, Pmode, LABEL), PTR_SIZE, 1)
#define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
assemble_integer (gen_rtx (SYMBOL_REF, SImode, LABEL), 4, 1)
#define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
assemble_integer (gen_rtx (MINUS, HImode, \
gen_rtx (SYMBOL_REF, Pmode, LABEL1), \
gen_rtx (SYMBOL_REF, Pmode, LABEL2)), \
2, 1)
#define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
assemble_integer (gen_rtx (MINUS, SImode, \
gen_rtx (SYMBOL_REF, Pmode, LABEL1), \
gen_rtx (SYMBOL_REF, Pmode, LABEL2)), \
4, 1)
#define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
assemble_integer (gen_rtx (MINUS, Pmode, \
gen_rtx (SYMBOL_REF, Pmode, LABEL1), \
gen_rtx (SYMBOL_REF, Pmode, LABEL2)), \
PTR_SIZE, 1)
#define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
#define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
assemble_integer (GEN_INT (VALUE), 4, 1)
#define ASM_OUTPUT_DWARF_VALUE4(FILE,LABEL) \
assemble_integer (gen_rtx (SYMBOL_REF, Pmode, LABEL), 4, 1)
#endif /* UNALIGNED_INT_ASM_OP */
#ifdef SET_ASM_OP
#ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
#define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
do { fprintf ((FILE), "\t%s\t", SET_ASM_OP); \
assemble_name (FILE, SY); \
fprintf ((FILE), ","); \
assemble_name (FILE, HI); \
fprintf ((FILE), "-"); \
assemble_name (FILE, LO); \
fprintf ((FILE), "\n"); \
} while (0)
#endif
#endif /* SET_ASM_OP */
/* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
newline is produced. When flag_debug_asm is asserted, we add commentary
at the end of the line, so we must avoid output of a newline here. */
#ifndef ASM_OUTPUT_DWARF_STRING
#define ASM_OUTPUT_DWARF_STRING(FILE,P) \
do { \
register int slen = strlen(P); \
register char *p = (P); \
register int i; \
fprintf (FILE, "\t.ascii \""); \
for (i = 0; i < slen; i++) \
{ \
register int c = p[i]; \
if (c == '\"' || c == '\\') \
putc ('\\', FILE); \
if (c >= ' ' && c < 0177) \
putc (c, FILE); \
else \
{ \
fprintf (FILE, "\\%o", c); \
} \
} \
fprintf (FILE, "\\0\""); \
} \
while (0)
#endif
/* The DWARF 2 CFA column which tracks the return address. Normally this
is the column for PC, or the first column after all of the hard
registers. */
#ifndef DWARF_FRAME_RETURN_COLUMN
#ifdef PC_REGNUM
#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
#else
#define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER
#endif
#endif
/* The mapping from gcc register number to DWARF 2 CFA column number. By
default, we just provide columns for all registers. */
#ifndef DWARF_FRAME_REGNUM
#define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
#endif
/* Hook used by __throw. */
rtx
expand_builtin_dwarf_fp_regnum ()
{
return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM));
}
/* The offset from the incoming value of %sp to the top of the stack frame
for the current function. */
#ifndef INCOMING_FRAME_SP_OFFSET
#define INCOMING_FRAME_SP_OFFSET 0
#endif
/* Return a pointer to a copy of the section string name S with all
attributes stripped off. */
static inline char *
stripattributes (s)
char *s;
{
char *stripped = xstrdup (s);
char *p = stripped;
while (*p && *p != ',')
p++;
*p = '\0';
return stripped;
}
/* Return the register number described by a given RTL node. */
static unsigned
reg_number (rtl)
register rtx rtl;
{
register unsigned regno = REGNO (rtl);
if (regno >= FIRST_PSEUDO_REGISTER)
{
warning ("internal regno botch: regno = %d\n", regno);
regno = 0;
}
regno = DBX_REGISTER_NUMBER (regno);
return regno;
}
struct reg_size_range
{
int beg;
int end;
int size;
};
/* Given a register number in REG_TREE, return an rtx for its size in bytes.
We do this in kind of a roundabout way, by building up a list of
register size ranges and seeing where our register falls in one of those
ranges. We need to do it this way because REG_TREE is not a constant,
and the target macros were not designed to make this task easy. */
rtx
expand_builtin_dwarf_reg_size (reg_tree, target)
tree reg_tree;
rtx target;
{
int size;
struct reg_size_range ranges[5];
tree t, t2;
int i = 0;
int n_ranges = 0;
int last_size = -1;
for (; i < FIRST_PSEUDO_REGISTER; ++i)
{
/* The return address is out of order on the MIPS, and we don't use
copy_reg for it anyway, so we don't care here how large it is. */
if (DWARF_FRAME_REGNUM (i) == DWARF_FRAME_RETURN_COLUMN)
continue;
size = GET_MODE_SIZE (reg_raw_mode[i]);
if (size != last_size)
{
ranges[n_ranges].beg = i;
ranges[n_ranges].size = last_size = GET_MODE_SIZE (reg_raw_mode[i]);
++n_ranges;
assert (n_ranges < 5);
}
ranges[n_ranges-1].end = i;
}
/* The usual case: fp regs surrounded by general regs. */
if (n_ranges == 3 && ranges[0].size == ranges[2].size)
{
assert ((DWARF_FRAME_REGNUM (ranges[1].end)
- DWARF_FRAME_REGNUM (ranges[1].beg))
== ranges[1].end - ranges[1].beg);
t = fold (build (GE_EXPR, integer_type_node, reg_tree,
build_int_2 (DWARF_FRAME_REGNUM (ranges[1].beg), 0)));
t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
build_int_2 (DWARF_FRAME_REGNUM (ranges[1].end), 0)));
t = fold (build (TRUTH_ANDIF_EXPR, integer_type_node, t, t2));
t = fold (build (COND_EXPR, integer_type_node, t,
build_int_2 (ranges[1].size, 0),
build_int_2 (ranges[0].size, 0)));
}
else
{
--n_ranges;
t = build_int_2 (ranges[n_ranges].size, 0);
size = DWARF_FRAME_REGNUM (ranges[n_ranges].beg);
for (; n_ranges--; )
{
assert ((DWARF_FRAME_REGNUM (ranges[n_ranges].end)
- DWARF_FRAME_REGNUM (ranges[n_ranges].beg))
== ranges[n_ranges].end - ranges[n_ranges].beg);
assert (DWARF_FRAME_REGNUM (ranges[n_ranges].beg) < size);
size = DWARF_FRAME_REGNUM (ranges[n_ranges].beg);
t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
build_int_2 (DWARF_FRAME_REGNUM
(ranges[n_ranges].end), 0)));
t = fold (build (COND_EXPR, integer_type_node, t2,
build_int_2 (ranges[n_ranges].size, 0), t));
}
}
return expand_expr (t, target, Pmode, 0);
}
/* Convert a DWARF call frame info. operation to its string name */
static char *
dwarf_cfi_name (cfi_opc)
register unsigned cfi_opc;
{
switch (cfi_opc)
{
case DW_CFA_advance_loc:
return "DW_CFA_advance_loc";
case DW_CFA_offset:
return "DW_CFA_offset";
case DW_CFA_restore:
return "DW_CFA_restore";
case DW_CFA_nop:
return "DW_CFA_nop";
case DW_CFA_set_loc:
return "DW_CFA_set_loc";
case DW_CFA_advance_loc1:
return "DW_CFA_advance_loc1";
case DW_CFA_advance_loc2:
return "DW_CFA_advance_loc2";
case DW_CFA_advance_loc4:
return "DW_CFA_advance_loc4";
case DW_CFA_offset_extended:
return "DW_CFA_offset_extended";
case DW_CFA_restore_extended:
return "DW_CFA_restore_extended";
case DW_CFA_undefined:
return "DW_CFA_undefined";
case DW_CFA_same_value:
return "DW_CFA_same_value";
case DW_CFA_register:
return "DW_CFA_register";
case DW_CFA_remember_state:
return "DW_CFA_remember_state";
case DW_CFA_restore_state:
return "DW_CFA_restore_state";
case DW_CFA_def_cfa:
return "DW_CFA_def_cfa";
case DW_CFA_def_cfa_register:
return "DW_CFA_def_cfa_register";
case DW_CFA_def_cfa_offset:
return "DW_CFA_def_cfa_offset";
/* SGI/MIPS specific */
case DW_CFA_MIPS_advance_loc8:
return "DW_CFA_MIPS_advance_loc8";
/* GNU extensions */
case DW_CFA_GNU_window_save:
return "DW_CFA_GNU_window_save";
case DW_CFA_GNU_args_size:
return "DW_CFA_GNU_args_size";
default:
return "DW_CFA_<unknown>";
}
}
/* Return a pointer to a newly allocated Call Frame Instruction. */
static inline dw_cfi_ref
new_cfi ()
{
register dw_cfi_ref cfi = (dw_cfi_ref) xmalloc (sizeof (dw_cfi_node));
cfi->dw_cfi_next = NULL;
cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0;
cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0;
return cfi;
}
/* Add a Call Frame Instruction to list of instructions. */
static inline void
add_cfi (list_head, cfi)
register dw_cfi_ref *list_head;
register dw_cfi_ref cfi;
{
register dw_cfi_ref *p;
/* Find the end of the chain. */
for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next)
;
*p = cfi;
}
/* Generate a new label for the CFI info to refer to. */
char *
dwarf2out_cfi_label ()
{
static char label[20];
static unsigned long label_num = 0;
ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", label_num++);
ASM_OUTPUT_LABEL (asm_out_file, label);
return label;
}
/* Add CFI to the current fde at the PC value indicated by LABEL if specified,
or to the CIE if LABEL is NULL. */
static void
add_fde_cfi (label, cfi)
register char *label;
register dw_cfi_ref cfi;
{
if (label)
{
register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
if (*label == 0)
label = dwarf2out_cfi_label ();
if (fde->dw_fde_current_label == NULL
|| strcmp (label, fde->dw_fde_current_label) != 0)
{
register dw_cfi_ref xcfi;
fde->dw_fde_current_label = label = xstrdup (label);
/* Set the location counter to the new label. */
xcfi = new_cfi ();
xcfi->dw_cfi_opc = DW_CFA_advance_loc4;
xcfi->dw_cfi_oprnd1.dw_cfi_addr = label;
add_cfi (&fde->dw_fde_cfi, xcfi);
}
add_cfi (&fde->dw_fde_cfi, cfi);
}
else
add_cfi (&cie_cfi_head, cfi);
}
/* Subroutine of lookup_cfa. */
static inline void
lookup_cfa_1 (cfi, regp, offsetp)
register dw_cfi_ref cfi;
register unsigned long *regp;
register long *offsetp;
{
switch (cfi->dw_cfi_opc)
{
case DW_CFA_def_cfa_offset:
*offsetp = cfi->dw_cfi_oprnd1.dw_cfi_offset;
break;
case DW_CFA_def_cfa_register:
*regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
break;
case DW_CFA_def_cfa:
*regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
*offsetp = cfi->dw_cfi_oprnd2.dw_cfi_offset;
break;
default:
break;
}
}
/* Find the previous value for the CFA. */
static void
lookup_cfa (regp, offsetp)
register unsigned long *regp;
register long *offsetp;
{
register dw_cfi_ref cfi;
*regp = (unsigned long) -1;
*offsetp = 0;
for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next)
lookup_cfa_1 (cfi, regp, offsetp);
if (fde_table_in_use)
{
register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next)
lookup_cfa_1 (cfi, regp, offsetp);
}
}
/* The current rule for calculating the DWARF2 canonical frame address. */
static unsigned long cfa_reg;
static long cfa_offset;
/* The register used for saving registers to the stack, and its offset
from the CFA. */
static unsigned cfa_store_reg;
static long cfa_store_offset;
/* The running total of the size of arguments pushed onto the stack. */
static long args_size;
/* Entry point to update the canonical frame address (CFA).
LABEL is passed to add_fde_cfi. The value of CFA is now to be
calculated from REG+OFFSET. */
void
dwarf2out_def_cfa (label, reg, offset)
register char *label;
register unsigned reg;
register long offset;
{
register dw_cfi_ref cfi;
unsigned long old_reg;
long old_offset;
cfa_reg = reg;
cfa_offset = offset;
if (cfa_store_reg == reg)
cfa_store_offset = offset;
reg = DWARF_FRAME_REGNUM (reg);
lookup_cfa (&old_reg, &old_offset);
if (reg == old_reg && offset == old_offset)
return;
cfi = new_cfi ();
if (reg == old_reg)
{
cfi->dw_cfi_opc = DW_CFA_def_cfa_offset;
cfi->dw_cfi_oprnd1.dw_cfi_offset = offset;
}
#ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
else if (offset == old_offset && old_reg != (unsigned long) -1)
{
cfi->dw_cfi_opc = DW_CFA_def_cfa_register;
cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
}
#endif
else
{
cfi->dw_cfi_opc = DW_CFA_def_cfa;
cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
}
add_fde_cfi (label, cfi);
}
/* Add the CFI for saving a register. REG is the CFA column number.
LABEL is passed to add_fde_cfi.
If SREG is -1, the register is saved at OFFSET from the CFA;
otherwise it is saved in SREG. */
static void
reg_save (label, reg, sreg, offset)
register char * label;
register unsigned reg;
register unsigned sreg;
register long offset;
{
register dw_cfi_ref cfi = new_cfi ();
cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
if (sreg == -1)
{
if (reg & ~0x3f)
/* The register number won't fit in 6 bits, so we have to use
the long form. */
cfi->dw_cfi_opc = DW_CFA_offset_extended;
else
cfi->dw_cfi_opc = DW_CFA_offset;
offset /= DWARF_CIE_DATA_ALIGNMENT;
assert (offset >= 0);
cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
}
else
{
cfi->dw_cfi_opc = DW_CFA_register;
cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg;
}
add_fde_cfi (label, cfi);
}
/* Add the CFI for saving a register window. LABEL is passed to reg_save.
This CFI tells the unwinder that it needs to restore the window registers
from the previous frame's window save area.
??? Perhaps we should note in the CIE where windows are saved (instead of
assuming 0(cfa)) and what registers are in the window. */
void
dwarf2out_window_save (label)
register char * label;
{
register dw_cfi_ref cfi = new_cfi ();
cfi->dw_cfi_opc = DW_CFA_GNU_window_save;
add_fde_cfi (label, cfi);
}
/* Add a CFI to update the running total of the size of arguments
pushed onto the stack. */
void
dwarf2out_args_size (label, size)
char *label;
long size;
{
register dw_cfi_ref cfi = new_cfi ();
cfi->dw_cfi_opc = DW_CFA_GNU_args_size;
cfi->dw_cfi_oprnd1.dw_cfi_offset = size;
add_fde_cfi (label, cfi);
}
/* Entry point for saving a register to the stack. REG is the GCC register
number. LABEL and OFFSET are passed to reg_save. */
void
dwarf2out_reg_save (label, reg, offset)
register char * label;
register unsigned reg;
register long offset;
{
reg_save (label, DWARF_FRAME_REGNUM (reg), -1, offset);
}
/* Entry point for saving the return address in the stack.
LABEL and OFFSET are passed to reg_save. */
void
dwarf2out_return_save (label, offset)
register char * label;
register long offset;
{
reg_save (label, DWARF_FRAME_RETURN_COLUMN, -1, offset);
}
/* Entry point for saving the return address in a register.
LABEL and SREG are passed to reg_save. */
void
dwarf2out_return_reg (label, sreg)
register char * label;
register unsigned sreg;
{
reg_save (label, DWARF_FRAME_RETURN_COLUMN, sreg, 0);
}
/* Record the initial position of the return address. RTL is
INCOMING_RETURN_ADDR_RTX. */
static void
initial_return_save (rtl)
register rtx rtl;
{
unsigned reg = -1;
long offset = 0;
switch (GET_CODE (rtl))
{
case REG:
/* RA is in a register. */
reg = reg_number (rtl);
break;
case MEM:
/* RA is on the stack. */
rtl = XEXP (rtl, 0);
switch (GET_CODE (rtl))
{
case REG:
assert (REGNO (rtl) == STACK_POINTER_REGNUM);
offset = 0;
break;
case PLUS:
assert (REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM);
offset = INTVAL (XEXP (rtl, 1));
break;
case MINUS:
assert (REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM);
offset = -INTVAL (XEXP (rtl, 1));
break;
default:
abort ();
}
break;
case PLUS:
/* The return address is at some offset from any value we can
actually load. For instance, on the SPARC it is in %i7+8. Just
ignore the offset for now; it doesn't matter for unwinding frames. */
assert (GET_CODE (XEXP (rtl, 1)) == CONST_INT);
initial_return_save (XEXP (rtl, 0));
return;
default:
abort ();
}
reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa_offset);
}
/* Check INSN to see if it looks like a push or a stack adjustment, and
make a note of it if it does. EH uses this information to find out how
much extra space it needs to pop off the stack. */
static void
dwarf2out_stack_adjust (insn)
rtx insn;
{
long offset;
char *label;
if (GET_CODE (insn) == BARRIER)
{
/* When we see a BARRIER, we know to reset args_size to 0. Usually
the compiler will have already emitted a stack adjustment, but
doesn't bother for calls to noreturn functions. */
#ifdef STACK_GROWS_DOWNWARD
offset = -args_size;
#else
offset = args_size;
#endif
}
else if (GET_CODE (PATTERN (insn)) == SET)
{
rtx src, dest;
enum rtx_code code;
insn = PATTERN (insn);
src = SET_SRC (insn);
dest = SET_DEST (insn);
if (dest == stack_pointer_rtx)
{
/* (set (reg sp) (plus (reg sp) (const_int))) */
code = GET_CODE (src);
if (! (code == PLUS || code == MINUS)
|| XEXP (src, 0) != stack_pointer_rtx
|| GET_CODE (XEXP (src, 1)) != CONST_INT)
return;
offset = INTVAL (XEXP (src, 1));
}
else if (GET_CODE (dest) == MEM)
{
/* (set (mem (pre_dec (reg sp))) (foo)) */
src = XEXP (dest, 0);
code = GET_CODE (src);
if (! (code == PRE_DEC || code == PRE_INC)
|| XEXP (src, 0) != stack_pointer_rtx)
return;
offset = GET_MODE_SIZE (GET_MODE (dest));
}
else
return;
if (code == PLUS || code == PRE_INC)
offset = -offset;
}
else
return;
if (offset == 0)
return;
if (cfa_reg == STACK_POINTER_REGNUM)
cfa_offset += offset;
#ifndef STACK_GROWS_DOWNWARD
offset = -offset;
#endif
args_size += offset;
if (args_size < 0)
args_size = 0;
label = dwarf2out_cfi_label ();
dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
dwarf2out_args_size (label, args_size);
}
/* Record call frame debugging information for INSN, which either
sets SP or FP (adjusting how we calculate the frame address) or saves a
register to the stack. If INSN is NULL_RTX, initialize our state. */
void
dwarf2out_frame_debug (insn)
rtx insn;
{
char *label;
rtx src, dest;
long offset;
/* A temporary register used in adjusting SP or setting up the store_reg. */
static unsigned cfa_temp_reg;
static long cfa_temp_value;
if (insn == NULL_RTX)
{
/* Set up state for generating call frame debug info. */
lookup_cfa (&cfa_reg, &cfa_offset);
assert (cfa_reg == DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM));
cfa_reg = STACK_POINTER_REGNUM;
cfa_store_reg = cfa_reg;
cfa_store_offset = cfa_offset;
cfa_temp_reg = -1;
cfa_temp_value = 0;
return;
}
if (! RTX_FRAME_RELATED_P (insn))
{
dwarf2out_stack_adjust (insn);
return;
}
label = dwarf2out_cfi_label ();
insn = PATTERN (insn);
/* Assume that in a PARALLEL prologue insn, only the first elt is
significant. Currently this is true. */
if (GET_CODE (insn) == PARALLEL)
insn = XVECEXP (insn, 0, 0);
assert (GET_CODE (insn) == SET);
src = SET_SRC (insn);
dest = SET_DEST (insn);
switch (GET_CODE (dest))
{
case REG:
/* Update the CFA rule wrt SP or FP. Make sure src is
relative to the current CFA register. */
switch (GET_CODE (src))
{
/* Setting FP from SP. */
case REG:
assert (cfa_reg == REGNO (src));
assert (REGNO (dest) == STACK_POINTER_REGNUM
|| (frame_pointer_needed
&& REGNO (dest) == HARD_FRAME_POINTER_REGNUM));
cfa_reg = REGNO (dest);
break;
case PLUS:
case MINUS:
if (dest == stack_pointer_rtx)
{
/* Adjusting SP. */
switch (GET_CODE (XEXP (src, 1)))
{
case CONST_INT:
offset = INTVAL (XEXP (src, 1));
break;
case REG:
assert (REGNO (XEXP (src, 1)) == cfa_temp_reg);
offset = cfa_temp_value;
break;
default:
abort ();
}
if (XEXP (src, 0) == hard_frame_pointer_rtx)
{
/* Restoring SP from FP in the epilogue. */
assert (cfa_reg == HARD_FRAME_POINTER_REGNUM);
cfa_reg = STACK_POINTER_REGNUM;
}
else
assert (XEXP (src, 0) == stack_pointer_rtx);
if (GET_CODE (src) == PLUS)
offset = -offset;
if (cfa_reg == STACK_POINTER_REGNUM)
cfa_offset += offset;
if (cfa_store_reg == STACK_POINTER_REGNUM)
cfa_store_offset += offset;
}
else
{
/* Initializing the store base register. */
assert (GET_CODE (src) == PLUS);
assert (XEXP (src, 1) == stack_pointer_rtx);
assert (GET_CODE (XEXP (src, 0)) == REG
&& REGNO (XEXP (src, 0)) == cfa_temp_reg);
assert (cfa_reg == STACK_POINTER_REGNUM);
cfa_store_reg = REGNO (dest);
cfa_store_offset = cfa_offset - cfa_temp_value;
}
break;
case CONST_INT:
cfa_temp_reg = REGNO (dest);
cfa_temp_value = INTVAL (src);
break;
case IOR:
assert (GET_CODE (XEXP (src, 0)) == REG
&& REGNO (XEXP (src, 0)) == cfa_temp_reg);
assert (REGNO (dest) == cfa_temp_reg);
assert (GET_CODE (XEXP (src, 1)) == CONST_INT);
cfa_temp_value |= INTVAL (XEXP (src, 1));
break;
default:
abort ();
}
dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
break;
case MEM:
/* Saving a register to the stack. Make sure dest is relative to the
CFA register. */
assert (GET_CODE (src) == REG);
switch (GET_CODE (XEXP (dest, 0)))
{
/* With a push. */
case PRE_INC:
case PRE_DEC:
offset = GET_MODE_SIZE (GET_MODE (dest));
if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
offset = -offset;
assert (REGNO (XEXP (XEXP (dest, 0), 0)) == STACK_POINTER_REGNUM);
assert (cfa_store_reg == STACK_POINTER_REGNUM);
cfa_store_offset += offset;
if (cfa_reg == STACK_POINTER_REGNUM)
cfa_offset = cfa_store_offset;
offset = -cfa_store_offset;
break;
/* With an offset. */
case PLUS:
case MINUS:
offset = INTVAL (XEXP (XEXP (dest, 0), 1));
if (GET_CODE (src) == MINUS)
offset = -offset;
assert (cfa_store_reg == REGNO (XEXP (XEXP (dest, 0), 0)));
offset -= cfa_store_offset;
break;
default:
abort ();
}
dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
dwarf2out_reg_save (label, REGNO (src), offset);
break;
default:
abort ();
}
}
/* Return the size of an unsigned LEB128 quantity. */
static inline unsigned long
size_of_uleb128 (value)
register unsigned long value;
{
register unsigned long size = 0;
register unsigned byte;
do
{
byte = (value & 0x7f);
value >>= 7;
size += 1;
}
while (value != 0);
return size;
}
/* Return the size of a signed LEB128 quantity. */
static inline unsigned long
size_of_sleb128 (value)
register long value;
{
register unsigned long size = 0;
register unsigned byte;
do
{
byte = (value & 0x7f);
value >>= 7;
size += 1;
}
while (!(((value == 0) && ((byte & 0x40) == 0))
|| ((value == -1) && ((byte & 0x40) != 0))));
return size;
}
/* Output an unsigned LEB128 quantity. */
static void
output_uleb128 (value)
register unsigned long value;
{
unsigned long save_value = value;
fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
do
{
register unsigned byte = (value & 0x7f);
value >>= 7;
if (value != 0)
/* More bytes to follow. */
byte |= 0x80;
fprintf (asm_out_file, "0x%x", byte);
if (value != 0)
fprintf (asm_out_file, ",");
}
while (value != 0);
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s ULEB128 0x%x", ASM_COMMENT_START, save_value);
}
/* Output an signed LEB128 quantity. */
static void
output_sleb128 (value)
register long value;
{
register int more;
register unsigned byte;
long save_value = value;
fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
do
{
byte = (value & 0x7f);
/* arithmetic shift */
value >>= 7;
more = !((((value == 0) && ((byte & 0x40) == 0))
|| ((value == -1) && ((byte & 0x40) != 0))));
if (more)
byte |= 0x80;
fprintf (asm_out_file, "0x%x", byte);
if (more)
fprintf (asm_out_file, ",");
}
while (more);
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s SLEB128 %d", ASM_COMMENT_START, save_value);
}
/* Output a Call Frame Information opcode and its operand(s). */
static void
output_cfi (cfi, fde)
register dw_cfi_ref cfi;
register dw_fde_ref fde;
{
if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
{
ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
cfi->dw_cfi_opc
| (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s DW_CFA_advance_loc 0x%x",
ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset);
fputc ('\n', asm_out_file);
}
else if (cfi->dw_cfi_opc == DW_CFA_offset)
{
ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
cfi->dw_cfi_opc
| (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s DW_CFA_offset, column 0x%x",
ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
fputc ('\n', asm_out_file);
output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
fputc ('\n', asm_out_file);
}
else if (cfi->dw_cfi_opc == DW_CFA_restore)
{
ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
cfi->dw_cfi_opc
| (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s DW_CFA_restore, column 0x%x",
ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
fputc ('\n', asm_out_file);
}
else
{
ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
dwarf_cfi_name (cfi->dw_cfi_opc));
fputc ('\n', asm_out_file);
switch (cfi->dw_cfi_opc)
{
case DW_CFA_set_loc:
ASM_OUTPUT_DWARF_ADDR (asm_out_file, cfi->dw_cfi_oprnd1.dw_cfi_addr);
fputc ('\n', asm_out_file);
break;
case DW_CFA_advance_loc1:
/* TODO: not currently implemented. */
abort ();
break;
case DW_CFA_advance_loc2:
ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
cfi->dw_cfi_oprnd1.dw_cfi_addr,
fde->dw_fde_current_label);
fputc ('\n', asm_out_file);
fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
break;
case DW_CFA_advance_loc4:
ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
cfi->dw_cfi_oprnd1.dw_cfi_addr,
fde->dw_fde_current_label);
fputc ('\n', asm_out_file);
fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
break;
#ifdef MIPS_DEBUGGING_INFO
case DW_CFA_MIPS_advance_loc8:
/* TODO: not currently implemented. */
abort ();
break;
#endif
case DW_CFA_offset_extended:
case DW_CFA_def_cfa:
output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
fputc ('\n', asm_out_file);
output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
fputc ('\n', asm_out_file);
break;
case DW_CFA_restore_extended:
case DW_CFA_undefined:
output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
fputc ('\n', asm_out_file);
break;
case DW_CFA_same_value:
case DW_CFA_def_cfa_register:
output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
fputc ('\n', asm_out_file);
break;
case DW_CFA_register:
output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
fputc ('\n', asm_out_file);
output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
fputc ('\n', asm_out_file);
break;
case DW_CFA_def_cfa_offset:
output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
fputc ('\n', asm_out_file);
break;
case DW_CFA_GNU_window_save:
break;
case DW_CFA_GNU_args_size:
output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
fputc ('\n', asm_out_file);
break;
default:
break;
}
}
}
#if !defined (EH_FRAME_SECTION)
#if defined (EH_FRAME_SECTION_ASM_OP)
#define EH_FRAME_SECTION() eh_frame_section();
#else
#if defined (ASM_OUTPUT_SECTION_NAME)
#define EH_FRAME_SECTION() \
do { \
named_section (NULL_TREE, ".eh_frame", 0); \
} while (0)
#endif
#endif
#endif
/* Output the call frame information used to used to record information
that relates to calculating the frame pointer, and records the
location of saved registers. */
static void
output_call_frame_info (for_eh)
int for_eh;
{
register unsigned long i, j;
register dw_fde_ref fde;
register unsigned long fde_size;
register dw_cfi_ref cfi;
unsigned long fde_pad;
char l1[20], l2[20];
#ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
char ld[20];
#endif
/* Do we want to include a pointer to the exception table? */
int eh_ptr = for_eh && exception_table_p ();
fputc ('\n', asm_out_file);
/* We're going to be generating comments, so turn on app. */
if (flag_debug_asm)
app_enable ();
if (for_eh)
{
#ifdef EH_FRAME_SECTION
EH_FRAME_SECTION ();
#else
tree label = get_file_function_name ('F');
data_section ();
ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
#endif
assemble_label ("__FRAME_BEGIN__");
}
else
ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
/* Output the CIE. */
ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
#ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
if (for_eh)
ASM_OUTPUT_DWARF_VALUE4 (asm_out_file, ld);
else
ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
#else
if (for_eh)
ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
else
ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
#endif
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s Length of Common Information Entry",
ASM_COMMENT_START);
fputc ('\n', asm_out_file);
ASM_OUTPUT_LABEL (asm_out_file, l1);
if (for_eh)
/* Now that the CIE pointer is PC-relative for EH,
use 0 to identify the CIE. */
ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
else
ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
fputc ('\n', asm_out_file);
if (! for_eh && DWARF_OFFSET_SIZE == 8)
{
ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
fputc ('\n', asm_out_file);
}
ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
fputc ('\n', asm_out_file);
if (eh_ptr)
{
/* The CIE contains a pointer to the exception region info for the
frame. Make the augmentation string three bytes (including the
trailing null) so the pointer is 4-byte aligned. The Solaris ld
can't handle unaligned relocs. */
if (flag_debug_asm)
{
ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
}
else
{
ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
}
fputc ('\n', asm_out_file);
ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s pointer to exception region info",
ASM_COMMENT_START);
}
else
{
ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
ASM_COMMENT_START);
}
fputc ('\n', asm_out_file);
output_uleb128 (1);
if (flag_debug_asm)
fprintf (asm_out_file, " (CIE Code Alignment Factor)");
fputc ('\n', asm_out_file);
output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
if (flag_debug_asm)
fprintf (asm_out_file, " (CIE Data Alignment Factor)");
fputc ('\n', asm_out_file);
ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
fputc ('\n', asm_out_file);
for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
output_cfi (cfi, NULL);
/* Pad the CIE out to an address sized boundary. */
ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
ASM_OUTPUT_LABEL (asm_out_file, l2);
#ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
#endif
/* Loop through all of the FDE's. */
for (i = 0; i < fde_table_in_use; ++i)
{
fde = &fde_table[i];
ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i*2);
ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i*2);
#ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i*2);
if (for_eh)
ASM_OUTPUT_DWARF_VALUE4 (asm_out_file, ld);
else
ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
#else
if (for_eh)
ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
else
ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
#endif
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
fputc ('\n', asm_out_file);
ASM_OUTPUT_LABEL (asm_out_file, l1);
if (for_eh)
ASM_OUTPUT_DWARF_DELTA (asm_out_file, l1, "__FRAME_BEGIN__");
else
ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
fputc ('\n', asm_out_file);
ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
fputc ('\n', asm_out_file);
ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
fde->dw_fde_end, fde->dw_fde_begin);
if (flag_debug_asm)
fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
fputc ('\n', asm_out_file);
/* Loop through the Call Frame Instructions associated with
this FDE. */
fde->dw_fde_current_label = fde->dw_fde_begin;
for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
output_cfi (cfi, fde);
/* Pad the FDE out to an address sized boundary. */
ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
ASM_OUTPUT_LABEL (asm_out_file, l2);
#ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
#endif
}
#ifndef EH_FRAME_SECTION
if (for_eh)
{
/* Emit terminating zero for table. */
ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
fputc ('\n', asm_out_file);
}
#endif
#ifdef MIPS_DEBUGGING_INFO
/* Work around Irix 6 assembler bug whereby labels at the end of a section
get a value of 0. Putting .align 0 after the label fixes it. */
ASM_OUTPUT_ALIGN (asm_out_file, 0);
#endif
/* Turn off app to make assembly quicker. */
if (flag_debug_asm)
app_disable ();
}
/* Output a marker (i.e. a label) for the beginning of a function, before
the prologue. */
void
dwarf2out_begin_prologue ()
{
char label[MAX_ARTIFICIAL_LABEL_BYTES];
register dw_fde_ref fde;
++current_funcdef_number;
function_section (current_function_decl);
ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
current_funcdef_number);
ASM_OUTPUT_LABEL (asm_out_file, label);
/* Expand the fde table if necessary. */
if (fde_table_in_use == fde_table_allocated)
{
fde_table_allocated += FDE_TABLE_INCREMENT;
fde_table
= (dw_fde_ref) xrealloc (fde_table,
fde_table_allocated * sizeof (dw_fde_node));
}
/* Record the FDE associated with this function. */
current_funcdef_fde = fde_table_in_use;
/* Add the new FDE at the end of the fde_table. */
fde = &fde_table[fde_table_in_use++];
fde->dw_fde_begin = xstrdup (label);
fde->dw_fde_current_label = NULL;
fde->dw_fde_end = NULL;
fde->dw_fde_cfi = NULL;
args_size = 0;
}
/* Output a marker (i.e. a label) for the absolute end of the generated code
for a function definition. This gets called *after* the epilogue code has
been generated. */
void
dwarf2out_end_epilogue ()
{
dw_fde_ref fde;
char label[MAX_ARTIFICIAL_LABEL_BYTES];
/* Output a label to mark the endpoint of the code generated for this
function. */
ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
ASM_OUTPUT_LABEL (asm_out_file, label);
fde = &fde_table[fde_table_in_use - 1];
fde->dw_fde_end = xstrdup (label);
}
void
dwarf2out_frame_init ()
{
/* Allocate the initial hunk of the fde_table. */
fde_table
= (dw_fde_ref) xmalloc (FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
bzero ((char *) fde_table, FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
fde_table_allocated = FDE_TABLE_INCREMENT;
fde_table_in_use = 0;
/* Generate the CFA instructions common to all FDE's. Do it now for the
sake of lookup_cfa. */
#ifdef DWARF2_UNWIND_INFO
/* On entry, the Canonical Frame Address is at SP. */
dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
initial_return_save (INCOMING_RETURN_ADDR_RTX);
#endif
}
void
dwarf2out_frame_finish ()
{
/* Output call frame information. */
#ifdef MIPS_DEBUGGING_INFO
if (write_symbols == DWARF2_DEBUG)
output_call_frame_info (0);
if (flag_exceptions && ! exceptions_via_longjmp)
output_call_frame_info (1);
#else
if (write_symbols == DWARF2_DEBUG
|| (flag_exceptions && ! exceptions_via_longjmp))
output_call_frame_info (1);
#endif
}
#endif /* .debug_frame support */
/* And now, the support for symbolic debugging information. */
#ifdef DWARF2_DEBUGGING_INFO
extern char *getpwd ();
/* NOTE: In the comments in this file, many references are made to
"Debugging Information Entries". This term is abbreviated as `DIE'
throughout the remainder of this file. */
/* An internal representation of the DWARF output is built, and then
walked to generate the DWARF debugging info. The walk of the internal
representation is done after the entire program has been compiled.
The types below are used to describe the internal representation. */
/* Each DIE may have a series of attribute/value pairs. Values
can take on several forms. The forms that are used in this
implementation are listed below. */
typedef enum
{
dw_val_class_addr,
dw_val_class_loc,
dw_val_class_const,
dw_val_class_unsigned_const,
dw_val_class_long_long,
dw_val_class_float,
dw_val_class_flag,
dw_val_class_die_ref,
dw_val_class_fde_ref,
dw_val_class_lbl_id,
dw_val_class_section_offset,
dw_val_class_str
}
dw_val_class;
/* Various DIE's use offsets relative to the beginning of the
.debug_info section to refer to each other. */
typedef long int dw_offset;
/* Define typedefs here to avoid circular dependencies. */
typedef struct die_struct *dw_die_ref;
typedef struct dw_attr_struct *dw_attr_ref;
typedef struct dw_val_struct *dw_val_ref;
typedef struct dw_line_info_struct *dw_line_info_ref;
typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
typedef struct pubname_struct *pubname_ref;
typedef dw_die_ref *arange_ref;
/* Describe a double word constant value. */
typedef struct dw_long_long_struct
{
unsigned long hi;
unsigned long low;
}
dw_long_long_const;
/* Describe a floating point constant value. */
typedef struct dw_fp_struct
{
long *array;
unsigned length;
}
dw_float_const;
/* Each entry in the line_info_table maintains the file and
line number associated with the label generated for that
entry. The label gives the PC value associated with
the line number entry. */
typedef struct dw_line_info_struct
{
unsigned long dw_file_num;
unsigned long dw_line_num;
}
dw_line_info_entry;
/* Line information for functions in separate sections; each one gets its
own sequence. */
typedef struct dw_separate_line_info_struct
{
unsigned long dw_file_num;
unsigned long dw_line_num;
unsigned long function;
}
dw_separate_line_info_entry;
/* The dw_val_node describes an attribute's value, as it is
represented internally. */
typedef struct dw_val_struct
{
dw_val_class val_class;
union
{
char *val_addr;
dw_loc_descr_ref val_loc;
long int val_int;
long unsigned val_unsigned;
dw_long_long_const val_long_long;
dw_float_const val_float;
dw_die_ref val_die_ref;
unsigned val_fde_index;
char *val_str;
char *val_lbl_id;
char *val_section;
unsigned char val_flag;
}
v;
}
dw_val_node;
/* Locations in memory are described using a sequence of stack machine
operations. */
typedef struct dw_loc_descr_struct
{
dw_loc_descr_ref dw_loc_next;
enum dwarf_location_atom dw_loc_opc;
dw_val_node dw_loc_oprnd1;
dw_val_node dw_loc_oprnd2;
}
dw_loc_descr_node;
/* Each DIE attribute has a field specifying the attribute kind,
a link to the next attribute in the chain, and an attribute value.
Attributes are typically linked below the DIE they modify. */
typedef struct dw_attr_struct
{
enum dwarf_attribute dw_attr;
dw_attr_ref dw_attr_next;
dw_val_node dw_attr_val;
}
dw_attr_node;
/* The Debugging Information Entry (DIE) structure */
typedef struct die_struct
{
enum dwarf_tag die_tag;
dw_attr_ref die_attr;
dw_attr_ref die_attr_last;
dw_die_ref die_parent;
dw_die_ref die_child;
dw_die_ref die_child_last;
dw_die_ref die_sib;
dw_offset die_offset;
unsigned long die_abbrev;
}
die_node;
/* The pubname structure */
typedef struct pubname_struct
{
dw_die_ref die;
char * name;
}
pubname_entry;
/* The limbo die list structure. */
typedef struct limbo_die_struct
{
dw_die_ref die;
struct limbo_die_struct *next;
}
limbo_die_node;
/* How to start an assembler comment. */
#ifndef ASM_COMMENT_START
#define ASM_COMMENT_START ";#"
#endif
/* Define a macro which returns non-zero for a TYPE_DECL which was
implicitly generated for a tagged type.
Note that unlike the gcc front end (which generates a NULL named
TYPE_DECL node for each complete tagged type, each array type, and
each function type node created) the g++ front end generates a
_named_ TYPE_DECL node for each tagged type node created.
These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
generate a DW_TAG_typedef DIE for them. */
#define TYPE_DECL_IS_STUB(decl) \
(DECL_NAME (decl) == NULL_TREE \
|| (DECL_ARTIFICIAL (decl) \
&& is_tagged_type (TREE_TYPE (decl)) \
&& ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
/* This is necessary for stub decls that \
appear in nested inline functions. */ \
|| (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
&& (decl_ultimate_origin (decl) \
== TYPE_STUB_DECL (TREE_TYPE (decl)))))))
/* Information concerning the compilation unit's programming
language, and compiler version. */
extern int flag_traditional;
extern char *version_string;
extern char *language_string;
/* Fixed size portion of the DWARF compilation unit header. */
#define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
/* Fixed size portion of debugging line information prolog. */
#define DWARF_LINE_PROLOG_HEADER_SIZE 5
/* Fixed size portion of public names info. */
#define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
/* Fixed size portion of the address range info. */
#define DWARF_ARANGES_HEADER_SIZE \
(DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
/* Define the architecture-dependent minimum instruction length (in bytes).
In this implementation of DWARF, this field is used for information
purposes only. Since GCC generates assembly language, we have
no a priori knowledge of how many instruction bytes are generated
for each source line, and therefore can use only the DW_LNE_set_address
and DW_LNS_fixed_advance_pc line information commands. */
#ifndef DWARF_LINE_MIN_INSTR_LENGTH
#define DWARF_LINE_MIN_INSTR_LENGTH 4
#endif
/* Minimum line offset in a special line info. opcode.
This value was chosen to give a reasonable range of values. */
#define DWARF_LINE_BASE -10
/* First special line opcde - leave room for the standard opcodes. */
#define DWARF_LINE_OPCODE_BASE 10
/* Range of line offsets in a special line info. opcode. */
#define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
/* Flag that indicates the initial value of the is_stmt_start flag.
In the present implementation, we do not mark any lines as
the beginning of a source statement, because that information
is not made available by the GCC front-end. */
#define DWARF_LINE_DEFAULT_IS_STMT_START 1
/* This location is used by calc_die_sizes() to keep track
the offset of each DIE within the .debug_info section. */
static unsigned long next_die_offset;
/* Record the root of the DIE's built for the current compilation unit. */
static dw_die_ref comp_unit_die;
/* A list of DIEs with a NULL parent waiting to be relocated. */
static limbo_die_node *limbo_die_list = 0;
/* Pointer to an array of filenames referenced by this compilation unit. */
static char **file_table;
/* Total number of entries in the table (i.e. array) pointed to by
`file_table'. This is the *total* and includes both used and unused
slots. */
static unsigned file_table_allocated;
/* Number of entries in the file_table which are actually in use. */
static unsigned file_table_in_use;
/* Size (in elements) of increments by which we may expand the filename
table. */
#define FILE_TABLE_INCREMENT 64
/* Local pointer to the name of the main input file. Initialized in
dwarf2out_init. */
static char *primary_filename;
/* For Dwarf output, we must assign lexical-blocks id numbers in the order in
which their beginnings are encountered. We output Dwarf debugging info
that refers to the beginnings and ends of the ranges of code for each
lexical block. The labels themselves are generated in final.c, which
assigns numbers to the blocks in the same way. */
static unsigned next_block_number = 2;
/* A pointer to the base of a table of references to DIE's that describe
declarations. The table is indexed by DECL_UID() which is a unique
number identifying each decl. */
static dw_die_ref *decl_die_table;
/* Number of elements currently allocated for the decl_die_table. */
static unsigned decl_die_table_allocated;
/* Number of elements in decl_die_table currently in use. */
static unsigned decl_die_table_in_use;
/* Size (in elements) of increments by which we may expand the
decl_die_table. */
#define DECL_DIE_TABLE_INCREMENT 256
/* A pointer to the base of a table of references to declaration
scopes. This table is a display which tracks the nesting
of declaration scopes at the current scope and containing
scopes. This table is used to find the proper place to
define type declaration DIE's. */
static tree *decl_scope_table;
/* Number of elements currently allocated for the decl_scope_table. */
static unsigned decl_scope_table_allocated;
/* Current level of nesting of declaration scopes. */
static unsigned decl_scope_depth;
/* Size (in elements) of increments by which we may expand the
decl_scope_table. */
#define DECL_SCOPE_TABLE_INCREMENT 64
/* A pointer to the base of a list of references to DIE's that
are uniquely identified by their tag, presence/absence of
children DIE's, and list of attribute/value pairs. */
static dw_die_ref *abbrev_die_table;
/* Number of elements currently allocated for abbrev_die_table. */
static unsigned abbrev_die_table_allocated;
/* Number of elements in type_die_table currently in use. */
static unsigned abbrev_die_table_in_use;
/* Size (in elements) of increments by which we may expand the
abbrev_die_table. */
#define ABBREV_DIE_TABLE_INCREMENT 256
/* A pointer to the base of a table that contains line information
for each source code line in .text in the compilation unit. */
static dw_line_info_ref line_info_table;
/* Number of elements currently allocated for line_info_table. */
static unsigned line_info_table_allocated;
/* Number of elements in separate_line_info_table currently in use. */
static unsigned separate_line_info_table_in_use;
/* A pointer to the base of a table that contains line information
for each source code line outside of .text in the compilation unit. */
static dw_separate_line_info_ref separate_line_info_table;
/* Number of elements currently allocated for separate_line_info_table. */
static unsigned separate_line_info_table_allocated;
/* Number of elements in line_info_table currently in use. */
static unsigned line_info_table_in_use;
/* Size (in elements) of increments by which we may expand the
line_info_table. */
#define LINE_INFO_TABLE_INCREMENT 1024
/* A pointer to the base of a table that contains a list of publicly
accessible names. */
static pubname_ref pubname_table;
/* Number of elements currently allocated for pubname_table. */
static unsigned pubname_table_allocated;
/* Number of elements in pubname_table currently in use. */
static unsigned pubname_table_in_use;
/* Size (in elements) of increments by which we may expand the
pubname_table. */
#define PUBNAME_TABLE_INCREMENT 64
/* A pointer to the base of a table that contains a list of publicly
accessible names. */
static arange_ref arange_table;
/* Number of elements currently allocated for arange_table. */
static unsigned arange_table_allocated;
/* Number of elements in arange_table currently in use. */
static unsigned arange_table_in_use;
/* Size (in elements) of increments by which we may expand the
arange_table. */
#define ARANGE_TABLE_INCREMENT 64
/* A pointer to the base of a list of pending types which we haven't
generated DIEs for yet, but which we will have to come back to
later on. */
static tree *pending_types_list;
/* Number of elements currently allocated for the pending_types_list. */
static unsigned pending_types_allocated;
/* Number of elements of pending_types_list currently in use. */
static unsigned pending_types;
/* Size (in elements) of increments by which we may expand the pending
types list. Actually, a single hunk of space of this size should
be enough for most typical programs. */
#define PENDING_TYPES_INCREMENT 64
/* Record whether the function being analyzed contains inlined functions. */
static int current_function_has_inlines;
static int comp_unit_has_inlines;
/* A pointer to the ..._DECL node which we have most recently been working
on. We keep this around just in case something about it looks screwy and
we want to tell the user what the source coordinates for the actual
declaration are. */
static tree dwarf_last_decl;
/* Forward declarations for functions defined in this file. */
static void addr_const_to_string PROTO((char *, rtx));
static char *addr_to_string PROTO((rtx));
static int is_pseudo_reg PROTO((rtx));
static tree type_main_variant PROTO((tree));
static int is_tagged_type PROTO((tree));
static char *dwarf_tag_name PROTO((unsigned));
static char *dwarf_attr_name PROTO((unsigned));
static char *dwarf_form_name PROTO((unsigned));
static char *dwarf_stack_op_name PROTO((unsigned));
static char *dwarf_type_encoding_name PROTO((unsigned));
static tree decl_ultimate_origin PROTO((tree));
static tree block_ultimate_origin PROTO((tree));
static tree decl_class_context PROTO((tree));
static void add_dwarf_attr PROTO((dw_die_ref, dw_attr_ref));
static void add_AT_flag PROTO((dw_die_ref,
enum dwarf_attribute,
unsigned));
static void add_AT_int PROTO((dw_die_ref,
enum dwarf_attribute, long));
static void add_AT_unsigned PROTO((dw_die_ref,
enum dwarf_attribute,
unsigned long));
static void add_AT_long_long PROTO((dw_die_ref,
enum dwarf_attribute,
unsigned long, unsigned long));
static void add_AT_float PROTO((dw_die_ref,
enum dwarf_attribute,
unsigned, long *));
static void add_AT_string PROTO((dw_die_ref,
enum dwarf_attribute, char *));
static void add_AT_die_ref PROTO((dw_die_ref,
enum dwarf_attribute,
dw_die_ref));
static void add_AT_fde_ref PROTO((dw_die_ref,
enum dwarf_attribute,
unsigned));
static void add_AT_loc PROTO((dw_die_ref,
enum dwarf_attribute,
dw_loc_descr_ref));
static void add_AT_addr PROTO((dw_die_ref,
enum dwarf_attribute, char *));
static void add_AT_lbl_id PROTO((dw_die_ref,
enum dwarf_attribute, char *));
static void add_AT_section_offset PROTO((dw_die_ref,
enum dwarf_attribute, char *));
static int is_extern_subr_die PROTO((dw_die_ref));
static dw_attr_ref get_AT PROTO((dw_die_ref,
enum dwarf_attribute));
static char *get_AT_low_pc PROTO((dw_die_ref));
static char *get_AT_hi_pc PROTO((dw_die_ref));
static char *get_AT_string PROTO((dw_die_ref,
enum dwarf_attribute));
static int get_AT_flag PROTO((dw_die_ref,
enum dwarf_attribute));
static unsigned get_AT_unsigned PROTO((dw_die_ref,
enum dwarf_attribute));
static int is_c_family PROTO((void));
static int is_fortran PROTO((void));
static void remove_AT PROTO((dw_die_ref,
enum dwarf_attribute));
static void remove_children PROTO((dw_die_ref));
static void add_child_die PROTO((dw_die_ref, dw_die_ref));
static dw_die_ref new_die PROTO((enum dwarf_tag, dw_die_ref));
static dw_die_ref lookup_type_die PROTO((tree));
static void equate_type_number_to_die PROTO((tree, dw_die_ref));
static dw_die_ref lookup_decl_die PROTO((tree));
static void equate_decl_number_to_die PROTO((tree, dw_die_ref));
static dw_loc_descr_ref new_loc_descr PROTO((enum dwarf_location_atom,
unsigned long, unsigned long));
static void add_loc_descr PROTO((dw_loc_descr_ref *,
dw_loc_descr_ref));
static void print_spaces PROTO((FILE *));
static void print_die PROTO((dw_die_ref, FILE *));
static void print_dwarf_line_table PROTO((FILE *));
static void add_sibling_attributes PROTO((dw_die_ref));
static void build_abbrev_table PROTO((dw_die_ref));
static unsigned long size_of_string PROTO((char *));
static unsigned long size_of_loc_descr PROTO((dw_loc_descr_ref));
static unsigned long size_of_locs PROTO((dw_loc_descr_ref));
static int constant_size PROTO((long unsigned));
static unsigned long size_of_die PROTO((dw_die_ref));
static void calc_die_sizes PROTO((dw_die_ref));
static unsigned long size_of_prolog PROTO((void));
static unsigned long size_of_line_info PROTO((void));
static unsigned long size_of_pubnames PROTO((void));
static unsigned long size_of_aranges PROTO((void));
static enum dwarf_form value_format PROTO((dw_val_ref));
static void output_value_format PROTO((dw_val_ref));
static void output_abbrev_section PROTO((void));
static void output_loc_operands PROTO((dw_loc_descr_ref));
static unsigned long sibling_offset PROTO((dw_die_ref));
static void output_die PROTO((dw_die_ref));
static void output_compilation_unit_header PROTO((void));
static char *dwarf2_name PROTO((tree, int));
static void add_pubname PROTO((tree, dw_die_ref));
static void output_pubnames PROTO((void));
static void add_arrange PROTO((tree, dw_die_ref));
static void output_arranges PROTO((void));
static void output_line_info PROTO((void));
static int is_body_block PROTO((tree));
static dw_die_ref base_type_die PROTO((tree));
static tree root_type PROTO((tree));
static int is_base_type PROTO((tree));
static dw_die_ref modified_type_die PROTO((tree, int, int, dw_die_ref));
static int type_is_enum PROTO((tree));
static dw_loc_descr_ref reg_loc_descriptor PROTO((rtx));
static dw_loc_descr_ref based_loc_descr PROTO((unsigned, long));
static int is_based_loc PROTO((rtx));
static dw_loc_descr_ref mem_loc_descriptor PROTO((rtx));
static dw_loc_descr_ref concat_loc_descriptor PROTO((rtx, rtx));
static dw_loc_descr_ref loc_descriptor PROTO((rtx));
static unsigned ceiling PROTO((unsigned, unsigned));
static tree field_type PROTO((tree));
static unsigned simple_type_align_in_bits PROTO((tree));
static unsigned simple_type_size_in_bits PROTO((tree));
static unsigned field_byte_offset PROTO((tree));
static void add_AT_location_description PROTO((dw_die_ref,
enum dwarf_attribute, rtx));
static void add_data_member_location_attribute PROTO((dw_die_ref, tree));
static void add_const_value_attribute PROTO((dw_die_ref, rtx));
static void add_location_or_const_value_attribute PROTO((dw_die_ref, tree));
static void add_name_attribute PROTO((dw_die_ref, char *));
static void add_bound_info PROTO((dw_die_ref,
enum dwarf_attribute, tree));
static void add_subscript_info PROTO((dw_die_ref, tree));
static void add_byte_size_attribute PROTO((dw_die_ref, tree));
static void add_bit_offset_attribute PROTO((dw_die_ref, tree));
static void add_bit_size_attribute PROTO((dw_die_ref, tree));
static void add_prototyped_attribute PROTO((dw_die_ref, tree));
static void add_abstract_origin_attribute PROTO((dw_die_ref, tree));
static void add_pure_or_virtual_attribute PROTO((dw_die_ref, tree));
static void add_src_coords_attributes PROTO((dw_die_ref, tree));
static void ad_name_and_src_coords_attributes PROTO((dw_die_ref, tree));
static void push_decl_scope PROTO((tree));
static dw_die_ref scope_die_for PROTO((tree, dw_die_ref));
static void pop_decl_scope PROTO((void));
static void add_type_attribute PROTO((dw_die_ref, tree, int, int,
dw_die_ref));
static char *type_tag PROTO((tree));
static tree member_declared_type PROTO((tree));
static char *decl_start_label PROTO((tree));
static void gen_arrqay_type_die PROTO((tree, dw_die_ref));
static void gen_set_type_die PROTO((tree, dw_die_ref));
static void gen_entry_point_die PROTO((tree, dw_die_ref));
static void pend_type PROTO((tree));
static void output_pending_types_for_scope PROTO((dw_die_ref));
static void gen_inlined_enumeration_type_die PROTO((tree, dw_die_ref));
static void gen_inlined_structure_type_die PROTO((tree, dw_die_ref));
static void gen_inlined_union_type_die PROTO((tree, dw_die_ref));
static void gen_enumeration_type_die PROTO((tree, dw_die_ref));
static dw_die_ref gen_formal_parameter_die PROTO((tree, dw_die_ref));
static void gen_unspecified_parameters_die PROTO((tree, dw_die_ref));
static void gen_formal_types_die PROTO((tree, dw_die_ref));
static void gen_subprogram_die PROTO((tree, dw_die_ref));
static void gen_variable_die PROTO((tree, dw_die_ref));
static void gen_label_die PROTO((tree, dw_die_ref));
static void gen_lexical_block_die PROTO((tree, dw_die_ref, int));
static void gen_inlined_subprogram_die PROTO((tree, dw_die_ref, int));
static void gen_field_die PROTO((tree, dw_die_ref));
static void gen_ptr_to_mbr_type_die PROTO((tree, dw_die_ref));
static void gen_compile_unit_die PROTO((char *));
static void gen_string_type_die PROTO((tree, dw_die_ref));
static void gen_inheritance_die PROTO((tree, dw_die_ref));
static void gen_member_die PROTO((tree, dw_die_ref));
static void gen_struct_or_union_type_die PROTO((tree, dw_die_ref));
static void gen_subroutine_type_die PROTO((tree, dw_die_ref));
static void gen_typedef_die PROTO((tree, dw_die_ref));
static void gen_type_die PROTO((tree, dw_die_ref));
static void gen_tagged_type_instantiation_die PROTO((tree, dw_die_ref));
static void gen_block_die PROTO((tree, dw_die_ref, int));
static void decls_for_scope PROTO((tree, dw_die_ref, int));
static int is_redundant_typedef PROTO((tree));
static void gen_decl_die PROTO((tree, dw_die_ref));
static unsigned lookup_filename PROTO((char *));
/* Section names used to hold DWARF debugging information. */
#ifndef DEBUG_INFO_SECTION
#define DEBUG_INFO_SECTION ".debug_info"
#endif
#ifndef ABBREV_SECTION
#define ABBREV_SECTION ".debug_abbrev"
#endif
#ifndef ARANGES_SECTION
#define ARANGES_SECTION ".debug_aranges"
#endif
#ifndef DW_MACINFO_SECTION
#define DW_MACINFO_SECTION ".debug_macinfo"
#endif
#ifndef DEBUG_LINE_SECTION
#define DEBUG_LINE_SECTION ".debug_line"
#endif
#ifndef LOC_SECTION
#define LOC_SECTION ".debug_loc"
#endif
#ifndef PUBNAMES_SECTION
#define PUBNAMES_SECTION ".debug_pubnames"
#endif
#ifndef STR_SECTION
#define STR_SECTION ".debug_str"
#endif
/* Standard ELF section names for compiled code and data. */
#ifndef TEXT_SECTION
#define TEXT_SECTION ".text"
#endif
#ifndef DATA_SECTION
#define DATA_SECTION ".data"
#endif
#ifndef BSS_SECTION
#define BSS_SECTION ".bss"
#endif
/* Definitions of defaults for formats and names of various special
(artificial) labels which may be generated within this file (when the -g
options is used and DWARF_DEBUGGING_INFO is in effect.
If necessary, these may be overridden from within the tm.h file, but
typically, overriding these defaults is unnecessary. */
static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
#ifndef TEXT_END_LABEL
#define TEXT_END_LABEL "Letext"
#endif
#ifndef DATA_END_LABEL
#define DATA_END_LABEL "Ledata"
#endif
#ifndef BSS_END_LABEL
#define BSS_END_LABEL "Lebss"
#endif
#ifndef INSN_LABEL_FMT
#define INSN_LABEL_FMT "LI%u_"
#endif
#ifndef BLOCK_BEGIN_LABEL
#define BLOCK_BEGIN_LABEL "LBB"
#endif
#ifndef BLOCK_END_LABEL
#define BLOCK_END_LABEL "LBE"
#endif
#ifndef BODY_BEGIN_LABEL
#define BODY_BEGIN_LABEL "Lbb"
#endif
#ifndef BODY_END_LABEL
#define BODY_END_LABEL "Lbe"
#endif
#ifndef LINE_CODE_LABEL
#define LINE_CODE_LABEL "LM"
#endif
#ifndef SEPARATE_LINE_CODE_LABEL
#define SEPARATE_LINE_CODE_LABEL "LSM"
#endif
/* Convert a reference to the assembler name of a C-level name. This
macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
a string rather than writing to a file. */
#ifndef ASM_NAME_TO_STRING
#define ASM_NAME_TO_STRING(STR, NAME) \
do { \
if ((NAME)[0] == '*') \
strcpy (STR, NAME+1); \
else \
strcpy (STR, NAME); \
} \
while (0)
#endif
/* Convert an integer constant expression into assembler syntax. Addition
and subtraction are the only arithmetic that may appear in these
expressions. This is an adaptation of output_addr_const in final.c.
Here, the target of the conversion is a string buffer. We can't use
output_addr_const directly, because it writes to a file. */
static void
addr_const_to_string (str, x)
char *str;
rtx x;
{
char buf1[256];
char buf2[256];
restart:
str[0] = '\0';
switch (GET_CODE (x))
{
case PC:
if (flag_pic)
strcat (str, ",");
else
abort ();
break;
case SYMBOL_REF:
ASM_NAME_TO_STRING (buf1, XSTR (x, 0));
strcat (str, buf1);
break;
case LABEL_REF:
ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (XEXP (x, 0)));
ASM_NAME_TO_STRING (buf2, buf1);
strcat (str, buf2);
break;
case CODE_LABEL:
ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (x));
ASM_NAME_TO_STRING (buf2, buf1);
strcat (str, buf2);
break;
case CONST_INT:
sprintf (buf1, HOST_WIDE_INT_PRINT_DEC, INTVAL (x));
strcat (str, buf1);
break;
case CONST:
/* This used to output parentheses around the expression, but that does
not work on the 386 (either ATT or BSD assembler). */
addr_const_to_string (buf1, XEXP (x, 0));
strcat (str, buf1);
break;
case CONST_DOUBLE:
if (GET_MODE (x) == VOIDmode)
{
/* We can use %d if the number is one word and positive. */
if (CONST_DOUBLE_HIGH (x))
sprintf (buf1, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x));
else if (CONST_DOUBLE_LOW (x) < 0)
sprintf (buf1, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (x));
else
sprintf (buf1, HOST_WIDE_INT_PRINT_DEC,
CONST_DOUBLE_LOW (x));
strcat (str, buf1);
}
else
/* We can't handle floating point constants; PRINT_OPERAND must
handle them. */
output_operand_lossage ("floating constant misused");
break;
case PLUS:
/* Some assemblers need integer constants to appear last (eg masm). */
if (GET_CODE (XEXP (x, 0)) == CONST_INT)
{
addr_const_to_string (buf1, XEXP (x, 1));
strcat (str, buf1);
if (INTVAL (XEXP (x, 0)) >= 0)
strcat (str, "+");
addr_const_to_string (buf1, XEXP (x, 0));
strcat (str, buf1);
}
else
{
addr_const_to_string (buf1, XEXP (x, 0));
strcat (str, buf1);
if (INTVAL (XEXP (x, 1)) >= 0)
strcat (str, "+");
addr_const_to_string (buf1, XEXP (x, 1));
strcat (str, buf1);
}
break;
case MINUS:
/* Avoid outputting things like x-x or x+5-x, since some assemblers
can't handle that. */
x = simplify_subtraction (x);
if (GET_CODE (x) != MINUS)
goto restart;
addr_const_to_string (buf1, XEXP (x, 0));
strcat (str, buf1);
strcat (str, "-");
if (GET_CODE (XEXP (x, 1)) == CONST_INT
&& INTVAL (XEXP (x, 1)) < 0)
{
strcat (str, ASM_OPEN_PAREN);
addr_const_to_string (buf1, XEXP (x, 1));
strcat (str, buf1);
strcat (str, ASM_CLOSE_PAREN);
}
else
{
addr_const_to_string (buf1, XEXP (x, 1));
strcat (str, buf1);
}
break;
case ZERO_EXTEND:
case SIGN_EXTEND:
addr_const_to_string (buf1, XEXP (x, 0));
strcat (str, buf1);
break;
default:
output_operand_lossage ("invalid expression as operand");
}
}
/* Convert an address constant to a string, and return a pointer to
a copy of the result, located on the heap. */
static char *
addr_to_string (x)
rtx x;
{
char buf[1024];
addr_const_to_string (buf, x);
return xstrdup (buf);
}
/* Test if rtl node points to a pseudo register. */
static inline int
is_pseudo_reg (rtl)
register rtx rtl;
{
return (((GET_CODE (rtl) == REG) && (REGNO (rtl) >= FIRST_PSEUDO_REGISTER))
|| ((GET_CODE (rtl) == SUBREG)
&& (REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)));
}
/* Return a reference to a type, with its const and volatile qualifiers
removed. */
static inline tree
type_main_variant (type)
register tree type;
{
type = TYPE_MAIN_VARIANT (type);
/* There really should be only one main variant among any group of variants
of a given type (and all of the MAIN_VARIANT values for all members of
the group should point to that one type) but sometimes the C front-end
messes this up for array types, so we work around that bug here. */
if (TREE_CODE (type) == ARRAY_TYPE)
while (type != TYPE_MAIN_VARIANT (type))
type = TYPE_MAIN_VARIANT (type);
return type;
}
/* Return non-zero if the given type node represents a tagged type. */
static inline int
is_tagged_type (type)
register tree type;
{
register enum tree_code code = TREE_CODE (type);
return (code == RECORD_TYPE || code == UNION_TYPE
|| code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
}
/* Convert a DIE tag into its string name. */
static char *
dwarf_tag_name (tag)
register unsigned tag;
{
switch (tag)
{
case DW_TAG_padding:
return "DW_TAG_padding";
case DW_TAG_array_type:
return "DW_TAG_array_type";
case DW_TAG_class_type:
return "DW_TAG_class_type";
case DW_TAG_entry_point:
return "DW_TAG_entry_point";
case DW_TAG_enumeration_type:
return "DW_TAG_enumeration_type";
case DW_TAG_formal_parameter:
return "DW_TAG_formal_parameter";
case DW_TAG_imported_declaration:
return "DW_TAG_imported_declaration";
case DW_TAG_label:
return "DW_TAG_label";
case DW_TAG_lexical_block:
return "DW_TAG_lexical_block";
case DW_TAG_member:
return "DW_TAG_member";
case DW_TAG_pointer_type:
return "DW_TAG_pointer_type";
case DW_TAG_reference_type:
return "DW_TAG_reference_type";
case DW_TAG_compile_unit:
return "DW_TAG_compile_unit";
case DW_TAG_string_type:
return "DW_TAG_string_type";
case DW_TAG_structure_type:
return "DW_TAG_structure_type";
case DW_TAG_subroutine_type:
return "DW_TAG_subroutine_type";
case DW_TAG_typedef:
return "DW_TAG_typedef";
case DW_TAG_union_type:
return "DW_TAG_union_type";
case DW_TAG_unspecified_parameters:
return "DW_TAG_unspecified_parameters";
case DW_TAG_variant:
return "DW_TAG_variant";
case DW_TAG_common_block:
return "DW_TAG_common_block";
case DW_TAG_common_inclusion:
return "DW_TAG_common_inclusion";
case DW_TAG_inheritance:
return "DW_TAG_inheritance";
case DW_TAG_inlined_subroutine:
return "DW_TAG_inlined_subroutine";
case DW_TAG_module:
return "DW_TAG_module";
case DW_TAG_ptr_to_member_type:
return "DW_TAG_ptr_to_member_type";
case DW_TAG_set_type:
return "DW_TAG_set_type";
case DW_TAG_subrange_type:
return "DW_TAG_subrange_type";
case DW_TAG_with_stmt:
return "DW_TAG_with_stmt";
case DW_TAG_access_declaration:
return "DW_TAG_access_declaration";
case DW_TAG_base_type:
return "DW_TAG_base_type";
case DW_TAG_catch_block:
return "DW_TAG_catch_block";
case DW_TAG_const_type:
return "DW_TAG_const_type";
case DW_TAG_constant:
return "DW_TAG_constant";
case DW_TAG_enumerator:
return "DW_TAG_enumerator";
case DW_TAG_file_type:
return "DW_TAG_file_type";
case DW_TAG_friend:
return "DW_TAG_friend";
case DW_TAG_namelist:
return "DW_TAG_namelist";
case DW_TAG_namelist_item:
return "DW_TAG_namelist_item";
case DW_TAG_packed_type:
return "DW_TAG_packed_type";
case DW_TAG_subprogram:
return "DW_TAG_subprogram";
case DW_TAG_template_type_param:
return "DW_TAG_template_type_param";
case DW_TAG_template_value_param:
return "DW_TAG_template_value_param";
case DW_TAG_thrown_type:
return "DW_TAG_thrown_type";
case DW_TAG_try_block:
return "DW_TAG_try_block";
case DW_TAG_variant_part:
return "DW_TAG_variant_part";
case DW_TAG_variable:
return "DW_TAG_variable";
case DW_TAG_volatile_type:
return "DW_TAG_volatile_type";
case DW_TAG_MIPS_loop:
return "DW_TAG_MIPS_loop";
case DW_TAG_format_label:
return "DW_TAG_format_label";
case DW_TAG_function_template:
return "DW_TAG_function_template";
case DW_TAG_class_template:
return "DW_TAG_class_template";
default:
return "DW_TAG_<unknown>";
}
}
/* Convert a DWARF attribute code into its string name. */
static char *
dwarf_attr_name (attr)
register unsigned attr;
{
switch (attr)
{
case DW_AT_sibling:
return "DW_AT_sibling";
case DW_AT_location:
return "DW_AT_location";
case DW_AT_name:
return "DW_AT_name";
case DW_AT_ordering:
return "DW_AT_ordering";
case DW_AT_subscr_data:
return "DW_AT_subscr_data";
case DW_AT_byte_size:
return "DW_AT_byte_size";
case DW_AT_bit_offset:
return "DW_AT_bit_offset";
case DW_AT_bit_size:
return "DW_AT_bit_size";
case DW_AT_element_list:
return "DW_AT_element_list";
case DW_AT_stmt_list:
return "DW_AT_stmt_list";
case DW_AT_low_pc:
return "DW_AT_low_pc";
case DW_AT_high_pc:
return "DW_AT_high_pc";
case DW_AT_language:
return "DW_AT_language";
case DW_AT_member:
return "DW_AT_member";
case DW_AT_discr:
return "DW_AT_discr";
case DW_AT_discr_value:
return "DW_AT_discr_value";
case DW_AT_visibility:
return "DW_AT_visibility";
case DW_AT_import:
return "DW_AT_import";
case DW_AT_string_length:
return "DW_AT_string_length";
case DW_AT_common_reference:
return "DW_AT_common_reference";
case DW_AT_comp_dir:
return "DW_AT_comp_dir";
case DW_AT_const_value:
return "DW_AT_const_value";
case DW_AT_containing_type:
return "DW_AT_containing_type";
case DW_AT_default_value:
return "DW_AT_default_value";
case DW_AT_inline:
return "DW_AT_inline";
case DW_AT_is_optional:
return "DW_AT_is_optional";
case DW_AT_lower_bound:
return "DW_AT_lower_bound";
case DW_AT_producer:
return "DW_AT_producer";
case DW_AT_prototyped:
return "DW_AT_prototyped";
case DW_AT_return_addr:
return "DW_AT_return_addr";
case DW_AT_start_scope:
return "DW_AT_start_scope";
case DW_AT_stride_size:
return "DW_AT_stride_size";
case DW_AT_upper_bound:
return "DW_AT_upper_bound";
case DW_AT_abstract_origin:
return "DW_AT_abstract_origin";
case DW_AT_accessibility:
return "DW_AT_accessibility";
case DW_AT_address_class:
return "DW_AT_address_class";
case DW_AT_artificial:
return "DW_AT_artificial";
case DW_AT_base_types:
return "DW_AT_base_types";
case DW_AT_calling_convention:
return "DW_AT_calling_convention";
case DW_AT_count:
return "DW_AT_count";
case DW_AT_data_member_location:
return "DW_AT_data_member_location";
case DW_AT_decl_column:
return "DW_AT_decl_column";
case DW_AT_decl_file:
return "DW_AT_decl_file";
case DW_AT_decl_line:
return "DW_AT_decl_line";
case DW_AT_declaration:
return "DW_AT_declaration";
case DW_AT_discr_list:
return "DW_AT_discr_list";
case DW_AT_encoding:
return "DW_AT_encoding";
case DW_AT_external:
return "DW_AT_external";
case DW_AT_frame_base:
return "DW_AT_frame_base";
case DW_AT_friend:
return "DW_AT_friend";
case DW_AT_identifier_case:
return "DW_AT_identifier_case";
case DW_AT_macro_info:
return "DW_AT_macro_info";
case DW_AT_namelist_items:
return "DW_AT_namelist_items";
case DW_AT_priority:
return "DW_AT_priority";
case DW_AT_segment:
return "DW_AT_segment";
case DW_AT_specification:
return "DW_AT_specification";
case DW_AT_static_link:
return "DW_AT_static_link";
case DW_AT_type:
return "DW_AT_type";
case DW_AT_use_location:
return "DW_AT_use_location";
case DW_AT_variable_parameter:
return "DW_AT_variable_parameter";
case DW_AT_virtuality:
return "DW_AT_virtuality";
case DW_AT_vtable_elem_location:
return "DW_AT_vtable_elem_location";
case DW_AT_MIPS_fde:
return "DW_AT_MIPS_fde";
case DW_AT_MIPS_loop_begin:
return "DW_AT_MIPS_loop_begin";
case DW_AT_MIPS_tail_loop_begin:
return "DW_AT_MIPS_tail_loop_begin";
case DW_AT_MIPS_epilog_begin:
return "DW_AT_MIPS_epilog_begin";
case DW_AT_MIPS_loop_unroll_factor:
return "DW_AT_MIPS_loop_unroll_factor";
case DW_AT_MIPS_software_pipeline_depth:
return "DW_AT_MIPS_software_pipeline_depth";
case DW_AT_MIPS_linkage_name:
return "DW_AT_MIPS_linkage_name";
case DW_AT_MIPS_stride:
return "DW_AT_MIPS_stride";
case DW_AT_MIPS_abstract_name:
return "DW_AT_MIPS_abstract_name";
case DW_AT_MIPS_clone_origin:
return "DW_AT_MIPS_clone_origin";
case DW_AT_MIPS_has_inlines:
return "DW_AT_MIPS_has_inlines";
case DW_AT_sf_names:
return "DW_AT_sf_names";
case DW_AT_src_info:
return "DW_AT_src_info";
case DW_AT_mac_info:
return "DW_AT_mac_info";
case DW_AT_src_coords:
return "DW_AT_src_coords";
case DW_AT_body_begin:
return "DW_AT_body_begin";
case DW_AT_body_end:
return "DW_AT_body_end";
default:
return "DW_AT_<unknown>";
}
}
/* Convert a DWARF value form code into its string name. */
static char *
dwarf_form_name (form)
register unsigned form;
{
switch (form)
{
case DW_FORM_addr:
return "DW_FORM_addr";
case DW_FORM_block2:
return "DW_FORM_block2";
case DW_FORM_block4:
return "DW_FORM_block4";
case DW_FORM_data2:
return "DW_FORM_data2";
case DW_FORM_data4:
return "DW_FORM_data4";
case DW_FORM_data8:
return "DW_FORM_data8";
case DW_FORM_string:
return "DW_FORM_string";
case DW_FORM_block:
return "DW_FORM_block";
case DW_FORM_block1:
return "DW_FORM_block1";
case DW_FORM_data1:
return "DW_FORM_data1";
case DW_FORM_flag:
return "DW_FORM_flag";
case DW_FORM_sdata:
return "DW_FORM_sdata";
case DW_FORM_strp:
return "DW_FORM_strp";
case DW_FORM_udata:
return "DW_FORM_udata";
case DW_FORM_ref_addr:
return "DW_FORM_ref_addr";
case DW_FORM_ref1:
return "DW_FORM_ref1";
case DW_FORM_ref2:
return "DW_FORM_ref2";
case DW_FORM_ref4:
return "DW_FORM_ref4";
case DW_FORM_ref8:
return "DW_FORM_ref8";
case DW_FORM_ref_udata:
return "DW_FORM_ref_udata";
case DW_FORM_indirect:
return "DW_FORM_indirect";
default:
return "DW_FORM_<unknown>";
}
}
/* Convert a DWARF stack opcode into its string name. */
static char *
dwarf_stack_op_name (op)
register unsigned op;
{
switch (op)
{
case DW_OP_addr:
return "DW_OP_addr";
case DW_OP_deref:
return "DW_OP_deref";
case DW_OP_const1u:
return "DW_OP_const1u";
case DW_OP_const1s:
return "DW_OP_const1s";
case DW_OP_const2u:
return "DW_OP_const2u";
case DW_OP_const2s:
return "DW_OP_const2s";
case DW_OP_const4u:
return "DW_OP_const4u";
case DW_OP_const4s:
return "DW_OP_const4s";
case DW_OP_const8u:
return "DW_OP_const8u";
case DW_OP_const8s:
return "DW_OP_const8s";
case DW_OP_constu:
return "DW_OP_constu";
case DW_OP_consts:
return "DW_OP_consts";
case DW_OP_dup:
return "DW_OP_dup";
case DW_OP_drop:
return "DW_OP_drop";
case DW_OP_over:
return "DW_OP_over";
case DW_OP_pick:
return "DW_OP_pick";
case DW_OP_swap:
return "DW_OP_swap";
case DW_OP_rot:
return "DW_OP_rot";
case DW_OP_xderef:
return "DW_OP_xderef";
case DW_OP_abs:
return "DW_OP_abs";
case DW_OP_and:
return "DW_OP_and";
case DW_OP_div:
return "DW_OP_div";
case DW_OP_minus:
return "DW_OP_minus";
case DW_OP_mod:
return "DW_OP_mod";
case DW_OP_mul:
return "DW_OP_mul";
case DW_OP_neg:
return "DW_OP_neg";
case DW_OP_not:
return "DW_OP_not";
case DW_OP_or:
return "DW_OP_or";
case DW_OP_plus:
return "DW_OP_plus";
case DW_OP_plus_uconst:
return "DW_OP_plus_uconst";
case DW_OP_shl:
return "DW_OP_shl";
case DW_OP_shr:
return "DW_OP_shr";
case DW_OP_shra:
return "DW_OP_shra";
case DW_OP_xor:
return "DW_OP_xor";
case DW_OP_bra:
return "DW_OP_bra";
case DW_OP_eq:
return "DW_OP_eq";
case DW_OP_ge:
return "DW_OP_ge";
case DW_OP_gt:
return "DW_OP_gt";
case DW_OP_le:
return "DW_OP_le";
case DW_OP_lt:
return "DW_OP_lt";
case DW_OP_ne:
return "DW_OP_ne";
case DW_OP_skip:
return "DW_OP_skip";
case DW_OP_lit0:
return "DW_OP_lit0";
case DW_OP_lit1:
return "DW_OP_lit1";
case DW_OP_lit2:
return "DW_OP_lit2";
case DW_OP_lit3:
return "DW_OP_lit3";
case DW_OP_lit4:
return "DW_OP_lit4";
case DW_OP_lit5:
return "DW_OP_lit5";
case DW_OP_lit6:
return "DW_OP_lit6";
case DW_OP_lit7:
return "DW_OP_lit7";
case DW_OP_lit8:
return "DW_OP_lit8";
case DW_OP_lit9:
return "DW_OP_lit9";
case DW_OP_lit10:
return "DW_OP_lit10";
case DW_OP_lit11:
return "DW_OP_lit11";
case DW_OP_lit12:
return "DW_OP_lit12";
case DW_OP_lit13:
return "DW_OP_lit13";
case DW_OP_lit14:
return "DW_OP_lit14";
case DW_OP_lit15:
return "DW_OP_lit15";
case DW_OP_lit16:
return "DW_OP_lit16";
case DW_OP_lit17:
return "DW_OP_lit17";
case DW_OP_lit18:
return "DW_OP_lit18";
case DW_OP_lit19:
return "DW_OP_lit19";
case DW_OP_lit20:
return "DW_OP_lit20";
case DW_OP_lit21:
return "DW_OP_lit21";
case DW_OP_lit22:
return "DW_OP_lit22";
case DW_OP_lit23:
return "DW_OP_lit23";
case DW_OP_lit24:
return "DW_OP_lit24";
case DW_OP_lit25:
return "DW_OP_lit25";
case DW_OP_lit26:
return "DW_OP_lit26";
case DW_OP_lit27:
return "DW_OP_lit27";
case DW_OP_lit28:
return "DW_OP_lit28";
case DW_OP_lit29:
return "DW_OP_lit29";
case DW_OP_lit30:
return "DW_OP_lit30";
case DW_OP_lit31:
return "DW_OP_lit31";
case DW_OP_reg0:
return "DW_OP_reg0";
case DW_OP_reg1:
return "DW_OP_reg1";
case DW_OP_reg2:
return "DW_OP_reg2";
case DW_OP_reg3:
return "DW_OP_reg3";
case DW_OP_reg4:
return "DW_OP_reg4";
case DW_OP_reg5:
return "DW_OP_reg5";
case DW_OP_reg6:
return "DW_OP_reg6";
case DW_OP_reg7:
return "DW_OP_reg7";
case DW_OP_reg8:
return "DW_OP_reg8";
case DW_OP_reg9:
return "DW_OP_reg9";
case DW_OP_reg10:
return "DW_OP_reg10";
case DW_OP_reg11:
return "DW_OP_reg11";
case DW_OP_reg12:
return "DW_OP_reg12";
case DW_OP_reg13:
return "DW_OP_reg13";
case DW_OP_reg14:
return "DW_OP_reg14";
case DW_OP_reg15:
return "DW_OP_reg15";
case DW_OP_reg16:
return "DW_OP_reg16";
case DW_OP_reg17:
return "DW_OP_reg17";
case DW_OP_reg18:
return "DW_OP_reg18";
case DW_OP_reg19:
return "DW_OP_reg19";
case DW_OP_reg20:
return "DW_OP_reg20";
case DW_OP_reg21:
return "DW_OP_reg21";
case DW_OP_reg22:
return "DW_OP_reg22";
case DW_OP_reg23:
return "DW_OP_reg23";
case DW_OP_reg24:
return "DW_OP_reg24";
case DW_OP_reg25:
return "DW_OP_reg25";
case DW_OP_reg26:
return "DW_OP_reg26";
case DW_OP_reg27:
return "DW_OP_reg27";
case DW_OP_reg28:
return "DW_OP_reg28";
case DW_OP_reg29:
return "DW_OP_reg29";
case DW_OP_reg30:
return "DW_OP_reg30";
case DW_OP_reg31:
return "DW_OP_reg31";
case DW_OP_breg0:
return "DW_OP_breg0";
case DW_OP_breg1:
return "DW_OP_breg1";
case DW_OP_breg2:
return "DW_OP_breg2";
case DW_OP_breg3: