Dwarf output for 6l.
Part 1, general scaffolding and pc/lc sections.
R=rsc, r, ken2
CC=golang-dev
https://golang.org/cl/1987042
diff --git a/src/cmd/6l/Makefile b/src/cmd/6l/Makefile
index 72bde44..0ee1a61 100644
--- a/src/cmd/6l/Makefile
+++ b/src/cmd/6l/Makefile
@@ -9,6 +9,7 @@
OFILES=\
asm.$O\
+ dwarf.$O\
elf.$O\
enam.$O\
go.$O\
@@ -26,6 +27,7 @@
../ld/lib.h\
../ld/elf.h\
../ld/macho.h\
+ ../ld/dwarf.h\
$(TARG): $(OFILES)
$(LD) -o $(TARG) -L"$(GOROOT)"/lib $(OFILES) -lbio -l9
diff --git a/src/cmd/6l/asm.c b/src/cmd/6l/asm.c
index fa419b6..db11f14 100644
--- a/src/cmd/6l/asm.c
+++ b/src/cmd/6l/asm.c
@@ -31,6 +31,7 @@
#include "l.h"
#include "../ld/lib.h"
#include "../ld/elf.h"
+#include "../ld/dwarf.h"
#include "../ld/macho.h"
#define Dbufslop 100
@@ -300,10 +301,9 @@
elfstr[ElfStrGosymcounts] = addstring(shstrtab, ".gosymcounts");
elfstr[ElfStrGosymtab] = addstring(shstrtab, ".gosymtab");
elfstr[ElfStrGopclntab] = addstring(shstrtab, ".gopclntab");
- if(debug['e']) {
- elfstr[ElfStrSymtab] = addstring(shstrtab, ".symtab");
- elfstr[ElfStrStrtab] = addstring(shstrtab, ".strtab");
- }
+ elfstr[ElfStrSymtab] = addstring(shstrtab, ".symtab");
+ elfstr[ElfStrStrtab] = addstring(shstrtab, ".strtab");
+ dwarfaddshstrings(shstrtab);
}
elfstr[ElfStrShstrtab] = addstring(shstrtab, ".shstrtab");
@@ -546,7 +546,7 @@
seek(cout, v, 0);
/* index of elf text section; needed by asmelfsym, double-checked below */
- /* debug['d'] causes 8 extra sections before the .text section */
+ /* !debug['d'] causes 8 extra sections before the .text section */
elftextsh = 1;
if(!debug['d'])
elftextsh += 8;
@@ -627,7 +627,7 @@
lputl(symsize);
lputl(lcsize);
cflush();
- if(!debug['s'] && debug['e']) {
+ if(!debug['s']) {
elfsymo = symo+8+symsize+lcsize;
seek(cout, elfsymo, 0);
asmelfsym();
@@ -635,7 +635,12 @@
elfstro = seek(cout, 0, 1);
elfsymsize = elfstro - elfsymo;
write(cout, elfstrdat, elfstrsize);
- }
+
+ if(debug['v'])
+ Bprint(&bso, "%5.2f dwarf\n", cputime());
+
+ dwarfemitdebugsections();
+ }
} else
if(dlm){
seek(cout, HEADR+textsize+datsize, 0);
@@ -910,22 +915,22 @@
sh->size = w;
sh->addralign = 1;
sh->addr = symdatva + 8 + symsize;
-
- if(debug['e']) {
- sh = newElfShdr(elfstr[ElfStrSymtab]);
- sh->type = SHT_SYMTAB;
- sh->off = elfsymo;
- sh->size = elfsymsize;
- sh->addralign = 8;
- sh->entsize = 24;
- sh->link = eh->shnum; // link to strtab
-
- sh = newElfShdr(elfstr[ElfStrStrtab]);
- sh->type = SHT_STRTAB;
- sh->off = elfstro;
- sh->size = elfstrsize;
- sh->addralign = 1;
- }
+
+ sh = newElfShdr(elfstr[ElfStrSymtab]);
+ sh->type = SHT_SYMTAB;
+ sh->off = elfsymo;
+ sh->size = elfsymsize;
+ sh->addralign = 8;
+ sh->entsize = 24;
+ sh->link = eh->shnum; // link to strtab
+
+ sh = newElfShdr(elfstr[ElfStrStrtab]);
+ sh->type = SHT_STRTAB;
+ sh->off = elfstro;
+ sh->size = elfstrsize;
+ sh->addralign = 1;
+
+ dwarfaddheaders();
}
sh = newElfShstrtab(elfstr[ElfStrShstrtab]);
@@ -977,6 +982,13 @@
cbc = sizeof(buf.cbuf);
}
+/* Current position in file */
+vlong
+cpos(void)
+{
+ return seek(cout, 0, 1) + sizeof(buf.cbuf) - cbc;
+}
+
void
outa(int n, uchar *cast, uchar *map, vlong l)
{
@@ -1322,4 +1334,3 @@
v -= c;
return v;
}
-
diff --git a/src/cmd/6l/l.h b/src/cmd/6l/l.h
index 23ca223..9a77658 100644
--- a/src/cmd/6l/l.h
+++ b/src/cmd/6l/l.h
@@ -394,6 +394,7 @@
Prog* brloop(Prog*);
void buildop(void);
void cflush(void);
+vlong cpos(void);
void ckoff(Sym*, int32);
Prog* copyp(Prog*);
double cputime(void);
diff --git a/src/cmd/6l/obj.c b/src/cmd/6l/obj.c
index 3b981a6..adcccb5 100644
--- a/src/cmd/6l/obj.c
+++ b/src/cmd/6l/obj.c
@@ -33,6 +33,7 @@
#include "../ld/lib.h"
#include "../ld/elf.h"
#include "../ld/macho.h"
+#include "../ld/dwarf.h"
#include <ar.h>
char *noname = "<none>";
@@ -575,6 +576,7 @@
histfrogp++;
} else
collapsefrog(s);
+ dwarfaddfrag(s->value, s->name);
}
goto loop;
}
@@ -1058,4 +1060,3 @@
}
}
}
-
diff --git a/src/cmd/ld/dwarf.c b/src/cmd/ld/dwarf.c
new file mode 100644
index 0000000..d14fddb
--- /dev/null
+++ b/src/cmd/ld/dwarf.c
@@ -0,0 +1,815 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "l.h"
+#include "lib.h"
+#include "../ld/dwarf.h"
+#include "../ld/dwarf_defs.h"
+#include "../ld/elf.h"
+
+/*
+ * Offsets and sizes of the .debug_* sections in the cout file.
+ */
+
+static vlong abbrevo;
+static vlong abbrevsize;
+static vlong lineo;
+static vlong linesize;
+static vlong infoo;
+static vlong infosize;
+
+
+/*
+ * Defining Abbrevs. This is hardcoded, and there will be
+ * only a handful of them. The DWARF spec places no restriction on
+ * the ordering of atributes in the Abbrevs and DIEs, and we will
+ * always write them out in the order of declaration in the abbrev.
+ * This implementation relies on tag, attr < 127, so they serialize as
+ * a char, hence we do not support user-defined tags or attributes.
+ */
+typedef struct DWAttrForm DWAttrForm;
+struct DWAttrForm {
+ uint8 attr;
+ uint8 form;
+};
+
+// index into the abbrevs table below.
+enum
+{
+ DW_ABRV_NULL,
+ DW_ABRV_COMPUNIT,
+ DW_NABRV
+};
+
+typedef struct DWAbbrev DWAbbrev;
+struct DWAbbrev {
+ uint8 tag;
+ uint8 children;
+ DWAttrForm attr[30];
+} abbrevs[DW_NABRV] = {
+ /* The mandatory DW_ABRV_NULL entry. */
+ { 0 },
+ /* COMPUNIT */
+ {
+ DW_TAG_compile_unit, DW_CHILDREN_yes,
+ DW_AT_name, DW_FORM_string,
+ DW_AT_language, DW_FORM_data1,
+ DW_AT_low_pc, DW_FORM_addr,
+ DW_AT_high_pc, DW_FORM_addr,
+ DW_AT_stmt_list, DW_FORM_data4,
+ 0, 0
+ },
+};
+
+/*
+ * Debugging Information Entries and their attributes
+ */
+
+
+// for string and block, value contains the length, and data the data,
+// for all others, value is the whole thing and data is null.
+
+typedef struct DWAttr DWAttr;
+struct DWAttr {
+ DWAttr *link;
+ uint8 atr; // DW_AT_
+ uint8 cls; // DW_CLS_
+ vlong value;
+ char *data;
+};
+
+typedef struct DWDie DWDie;
+struct DWDie {
+ int abbrev;
+ DWDie *link;
+ DWDie *child;
+ DWAttr *attr;
+};
+
+// top level compilation unit DIE's
+static DWDie *dwinfo;
+
+static DWDie*
+newdie(DWDie *link, int abbrev)
+{
+ DWDie *die;
+
+ die = mal(sizeof *die);
+ die->abbrev = abbrev;
+ die->link = link;
+ return die;
+}
+
+static DWAttr*
+newattr(DWDie *die, uint8 attr, int cls, vlong value, char *data)
+{
+ DWAttr *a;
+
+ a = mal(sizeof *a);
+ a->link = die->attr;
+ die->attr = a;
+ a->atr = attr;
+ a->cls = cls;
+ a->value = value;
+ a->data = data;
+ return a;
+}
+
+static void
+uleb128put(uvlong v)
+{
+ uint8 c;
+
+ do {
+ c = v & 0x7f;
+ v >>= 7;
+ if (v) c |= 0x80;
+ cput(c);
+ } while (c & 0x80);
+};
+
+static void
+sleb128put(vlong v)
+{
+ uint8 c, s;
+
+ do {
+ c = v & 0x7f;
+ s = c & 0x40;
+ v >>= 7;
+ if ((v != -1 || !s) && (v != 0 || s))
+ c |= 0x80;
+ cput(c);
+ } while(c & 0x80);
+};
+
+static void
+putattr(int form, int cls, vlong value, char *data)
+{
+ switch(form) {
+ case DW_FORM_addr: // address
+ VPUT(value);
+ break;
+
+ case DW_FORM_block1: // block
+ value &= 0xff;
+ cput(value);
+ while(value--)
+ cput(*data++);
+ break;
+
+ case DW_FORM_block2: // block
+ value &= 0xffff;
+ WPUT(value);
+ while(value--)
+ cput(*data++);
+ break;
+
+ case DW_FORM_block4: // block
+ value &= 0xffffffff;
+ LPUT(value);
+ while(value--)
+ cput(*data++);
+ break;
+
+ case DW_FORM_block: // block
+ uleb128put(value);
+ while(value--)
+ cput(*data++);
+ break;
+
+ case DW_FORM_data1: // constant
+ cput(value);
+ break;
+
+ case DW_FORM_data2: // constant
+ WPUT(value);
+ break;
+
+ case DW_FORM_data4: // constant, lineptr, loclistptr, macptr, rangelistptr
+ LPUT(value);
+ break;
+
+ case DW_FORM_data8: // constant, lineptr, loclistptr, macptr, rangelistptr
+ VPUT(value);
+ break;
+
+ case DW_FORM_sdata: // constant
+ sleb128put(value);
+ break;
+
+ case DW_FORM_udata: // constant
+ uleb128put(value);
+ break;
+
+ case DW_FORM_string: // string
+ strnput(data, value+1);
+ break;
+
+ case DW_FORM_flag: // flag
+ cput(value?1:0);
+ break;
+
+ case DW_FORM_strp: // string
+ case DW_FORM_ref_addr: // reference
+ case DW_FORM_ref1: // reference
+ case DW_FORM_ref2: // reference
+ case DW_FORM_ref4: // reference
+ case DW_FORM_ref8: // reference
+ case DW_FORM_ref_udata: // reference
+ case DW_FORM_indirect: // (see Section 7.5.3)
+ default:
+ diag("Unsupported atribute form %d / class %d", form, cls);
+ errorexit();
+ }
+}
+
+static void
+putattrs(int abbrev, DWAttr* attr)
+{
+ DWAttr *attrs[DW_AT_recursive + 1];
+ DWAttrForm* af;
+
+ memset(attrs, 0, sizeof attrs);
+ for( ; attr; attr = attr->link)
+ attrs[attr->atr] = attr;
+ for(af = abbrevs[abbrev].attr; af->attr; af++)
+ if (attrs[af->attr])
+ putattr(af->form,
+ attrs[af->attr]->cls,
+ attrs[af->attr]->value,
+ attrs[af->attr]->data);
+ else
+ putattr(af->form, 0, 0, 0);
+}
+
+static void putdie(DWDie* die);
+
+static void
+putdies(DWDie* die)
+{
+ for(; die; die = die->link)
+ putdie(die);
+}
+
+static void
+putdie(DWDie* die)
+{
+ uleb128put(die->abbrev);
+ putattrs(die->abbrev, die->attr);
+ if (abbrevs[die->abbrev].children) {
+ putdies(die->child);
+ cput(0);
+ }
+}
+
+static void
+reverselist(DWDie** list)
+{
+ DWDie *curr, * prev;
+
+ curr = *list;
+ prev = 0;
+ while(curr) {
+ DWDie* next = curr->link;
+ curr->link = prev;
+ prev = curr;
+ curr = next;
+ }
+ *list = prev;
+}
+
+/*
+ * Filename fragments for the line history stack.
+ */
+
+static char **ftab;
+static int ftabsize;
+
+void
+dwarfaddfrag(int n, char *frag)
+{
+ int s;
+
+ if (n >= ftabsize) {
+ s = ftabsize;
+ ftabsize = 1 + n + (n >> 2);
+ ftab = realloc(ftab, ftabsize * sizeof(ftab[0]));
+ memset(ftab + s, 0, (ftabsize - s) * sizeof(ftab[0]));
+ }
+
+ if (*frag == '<')
+ frag++;
+ ftab[n] = frag;
+}
+
+// Returns a malloc'ed string, piecewise copied from the ftab.
+static char *
+decodez(char *s)
+{
+ int len, o;
+ char *ss, *f;
+ char *r, *rb, *re;
+
+ len = 0;
+ ss = s + 1; // first is 0
+ while((o = ((uint8)ss[0] << 8) | (uint8)ss[1]) != 0) {
+ if (o < 0 || o >= ftabsize) {
+ diag("corrupt z entry");
+ return 0;
+ }
+ f = ftab[o];
+ if (!f) {
+ diag("corrupt z entry");
+ return 0;
+ }
+ len += strlen(f) + 1; // for the '/'
+ ss += 2;
+ }
+
+ if (len == 0)
+ return 0;
+
+ r = malloc(len + 1);
+ rb = r;
+ re = rb + len + 1;
+
+ s++;
+ while((o = ((uint8)s[0] << 8) | (uint8)s[1]) != 0) {
+ f = ftab[o];
+ if (rb == r || rb[-1] == '/')
+ rb = seprint(rb, re, "%s", f);
+ else
+ rb = seprint(rb, re, "/%s", f);
+ s += 2;
+ }
+ return r;
+}
+
+/*
+ * The line history itself
+ */
+
+static char **histfile; // [0] holds the empty string.
+static int histfilesize;
+static int histfilecap;
+
+static void
+clearhistfile(void)
+{
+ int i;
+
+ // [0] holds the empty string.
+ for (i = 1; i < histfilesize; i++)
+ free(histfile[i]);
+ histfilesize = 0;
+}
+
+static int
+addhistfile(char *zentry)
+{
+ char *fname;
+
+ if (histfilesize == histfilecap) {
+ histfilecap = 2 * histfilecap + 2;
+ histfile = realloc(histfile, histfilecap * sizeof(char*));
+ }
+ if (histfilesize == 0)
+ histfile[histfilesize++] = "<eof>";
+
+ fname = decodez(zentry);
+ if (fname == 0)
+ return -1;
+ // Don't fill with duplicates (check only top one).
+ if (strcmp(fname, histfile[histfilesize-1]) == 0) {
+ free(fname);
+ return histfilesize - 1;
+ }
+ histfile[histfilesize++] = fname;
+ return histfilesize - 1;
+}
+
+// Go's runtime C sources are sane, and Go sources nest only 1 level,
+// so 16 should be plenty.
+static struct {
+ int file;
+ vlong line;
+} includestack[16];
+static int includetop;
+static vlong absline;
+
+typedef struct Linehist Linehist;
+struct Linehist {
+ Linehist *link;
+ vlong absline;
+ vlong line;
+ int file;
+};
+
+static Linehist *linehist;
+
+static void
+checknesting(void)
+{
+ int i;
+
+ if (includetop < 0) {
+ diag("corrupt z stack");
+ errorexit();
+ }
+ if (includetop >= nelem(includestack)) {
+ diag("nesting too deep");
+ for (i = 0; i < nelem(includestack); i++)
+ diag("\t%s", histfile[includestack[i].file]);
+ errorexit();
+ }
+}
+
+/* find z and Z entries in the Auto list (of a Prog), and reset the history stack */
+static char *
+inithist(Auto *a)
+{
+ char *unitname;
+ Linehist *lh;
+
+ for (; a; a = a->link)
+ if (a->type == D_FILE)
+ break;
+ if (a==nil)
+ return 0;
+
+ // We have a new history. They are guaranteed to come completely
+ // at the beginning of the compilation unit.
+ if (a->aoffset != 1) {
+ diag("stray 'z' with offset %d", a->aoffset);
+ return 0;
+ }
+
+ unitname = decodez(a->asym->name);
+
+ // Clear the history.
+ clearhistfile();
+ includetop = 0;
+ includestack[includetop].file = 0;
+ includestack[includetop].line = -1;
+ absline = 0;
+ while (linehist != nil) {
+ lh = linehist->link;
+ free(linehist);
+ linehist = lh;
+ }
+
+ // Construct the new one.
+ for (; a; a = a->link) {
+ if (a->type == D_FILE) { // 'z'
+ int f = addhistfile(a->asym->name);
+ if (f < 0) { // pop file
+ includetop--;
+ checknesting();
+ } else if(f != includestack[includetop].file) { // pushed a new file
+ includestack[includetop].line += a->aoffset - absline;
+ includetop++;
+ checknesting();
+ includestack[includetop].file = f;
+ includestack[includetop].line = 1;
+
+ }
+ absline = a->aoffset;
+ } else if (a->type == D_FILE1) { // 'Z'
+ // We could just fixup the current
+ // linehist->line, but there doesn't appear to
+ // be a guarantee that every 'Z' is preceded
+ // by it's own 'z', so do the safe thing and
+ // update the stack and push a new Linehist
+ // entry
+ includestack[includetop].line = a->aoffset;
+ } else
+ continue;
+ if (linehist == 0 || linehist->absline != absline) {
+ Linehist* lh = malloc(sizeof *lh);
+ lh->link = linehist;
+ lh->absline = absline;
+ linehist = lh;
+ }
+ linehist->file = includestack[includetop].file;
+ linehist->line = includestack[includetop].line;
+ }
+ return unitname;
+}
+
+static Linehist *
+searchhist(vlong absline)
+{
+ Linehist *lh;
+
+ for (lh = linehist; lh; lh = lh->link)
+ if (lh->absline <= absline)
+ break;
+ return lh;
+}
+
+static void
+writeabbrev(void)
+{
+ int i, n;
+
+ abbrevo = cpos();
+ for (i = 1; i < DW_NABRV; i++) {
+ // See section 7.5.3
+ uleb128put(i);
+ uleb128put(abbrevs[i].tag);
+ cput(abbrevs[i].children);
+ // 0 is not a valid attr or form, so we can treat this as
+ // a string
+ n = strlen((char *) abbrevs[i].attr) / 2;
+ strnput((char *) abbrevs[i].attr,
+ (n + 1) * sizeof(DWAttrForm));
+ }
+ cput(0);
+ abbrevsize = cpos() - abbrevo;
+}
+
+
+static int
+guesslang(char *s)
+{
+ if(strlen(s) >= 3 && strcmp(s+strlen(s)-3, ".go") == 0)
+ return DW_LANG_Go;
+
+ return DW_LANG_C;
+}
+
+/*
+ * Generate short opcodes when possible, long ones when neccesary.
+ * See section 6.2.5
+ */
+
+enum {
+ LINE_BASE = -1,
+ LINE_RANGE = 4,
+ OPCODE_BASE = 5
+};
+
+static void
+putpclcdelta(vlong delta_pc, vlong delta_lc)
+{
+ if (LINE_BASE <= delta_lc && delta_lc < LINE_BASE+LINE_RANGE) {
+ vlong opcode = OPCODE_BASE + (delta_lc - LINE_BASE) + (LINE_RANGE * delta_pc);
+ if (OPCODE_BASE <= opcode && opcode < 256) {
+ cput(opcode);
+ return;
+ }
+ }
+
+ if (delta_pc) {
+ cput(DW_LNS_advance_pc);
+ sleb128put(delta_pc);
+ }
+
+ cput(DW_LNS_advance_line);
+ sleb128put(delta_lc);
+ cput(DW_LNS_copy);
+}
+
+
+/*
+ * Walk prog table, emit line program and build DIE tree.
+ */
+
+// flush previous compilation unit.
+static void
+flushunit(vlong pc, vlong unitstart)
+{
+ vlong here;
+
+ if (dwinfo != 0 && pc != 0) {
+ newattr(dwinfo, DW_AT_high_pc, DW_CLS_ADDRESS, pc, 0);
+ }
+
+ if (unitstart >= 0) {
+ cput(0); // start extended opcode
+ uleb128put(1);
+ cput(DW_LNE_end_sequence);
+ cflush();
+
+ here = cpos();
+ seek(cout, unitstart, 0);
+ LPUT(here - unitstart - sizeof(int32));
+ cflush();
+ seek(cout, here, 0);
+ }
+}
+
+static void
+writelines(void)
+{
+ Prog *p, *q;
+ Sym *s;
+ char *unitname;
+ vlong unitstart;
+ vlong pc, lc, llc, lline;
+ int currfile;
+ int i;
+ Linehist *lh;
+
+ unitstart = -1;
+ pc = 0;
+ lc = 1;
+ llc = 1;
+ currfile = -1;
+ lineo = cpos();
+
+ for (p = textp; p != P; p = p->pcond) {
+ s = p->from.sym;
+ if (s == nil || s->type != STEXT) {
+ diag("->pcond was supposed to loop over STEXT: %P", p);
+ continue;
+ }
+
+ // Look for history stack. If we find one,
+ // we're entering a new compilation unit
+ if ((unitname = inithist(p->to.autom)) != 0) {
+ flushunit(pc, unitstart);
+ unitstart = cpos();
+ if(debug['v'] > 1) {
+ print("dwarf writelines found %s\n", unitname);
+ Linehist* lh;
+ for (lh = linehist; lh; lh = lh->link)
+ print("\t%8lld: [%4lld]%s\n",
+ lh->absline, lh->line, histfile[lh->file]);
+ }
+ dwinfo = newdie(dwinfo, DW_ABRV_COMPUNIT);
+ newattr(dwinfo, DW_AT_name, DW_CLS_STRING, strlen(unitname), unitname);
+ newattr(dwinfo, DW_AT_language, DW_CLS_CONSTANT, guesslang(unitname), 0);
+ newattr(dwinfo, DW_AT_stmt_list, DW_CLS_PTR, unitstart - lineo, 0);
+ newattr(dwinfo, DW_AT_low_pc, DW_CLS_ADDRESS, p->pc, 0);
+ // Write .debug_line Line Number Program Header (sec 6.2.4)
+ // Fields marked with (*) must be changed for 64-bit dwarf
+ LPUT(0); // unit_length (*), will be filled in later.
+ WPUT(3); // version
+ LPUT(11); // header_length (*)
+ cput(1); // minimum_instruction_length
+ cput(1); // default_is_stmt
+ cput(LINE_BASE); // line_base
+ cput(LINE_RANGE); // line_range
+ cput(OPCODE_BASE); // opcode_base (we only use 1..4)
+ cput(0); // standard_opcode_lengths[1]
+ cput(1); // standard_opcode_lengths[2]
+ cput(1); // standard_opcode_lengths[3]
+ cput(1); // standard_opcode_lengths[4]
+ cput(0); // include_directories (empty)
+ cput(0); // file_names (empty) (emitted by DW_LNE's below)
+ for (i=1; i < histfilesize; i++) {
+ cput(0); // start extended opcode
+ uleb128put(1 + strlen(histfile[i]) + 4);
+ cput(DW_LNE_define_file);
+ strnput(histfile[i], strlen(histfile[i]) + 4);
+ // 4 zeros: the string termination + 3 fields.
+ }
+ pc = p->pc;
+ currfile = 1;
+ lc = 1;
+ llc = 1;
+ cput(0); // start extended opcode
+ uleb128put(1 + sizeof pc);
+ cput(DW_LNE_set_address);
+ VPUT(pc);
+ }
+ if (!p->from.sym->reachable)
+ continue;
+ if (unitstart < 0) {
+ diag("Reachable code before seeing any history: %P", p);
+ continue;
+ }
+ for(q = p; q != P && (q == p || q->as != ATEXT); q = q->link) {
+ lh = searchhist(q->line);
+ if (!lh) {
+ diag("corrupt history or bad absolute line: %P", q);
+ continue;
+ }
+ lline = lh->line + q->line - lh->absline;
+ if (debug['v'] > 1)
+ print("%6llux %s[%lld] %P\n", q->pc, histfile[lh->file], lline, q);
+ // Only emit a line program statement if line has changed.
+ if (q->line == lc)
+ continue;
+ if (currfile != lh->file) {
+ currfile = lh->file;
+ cput(DW_LNS_set_file);
+ uleb128put(currfile);
+ }
+ putpclcdelta(q->pc - pc, lline - llc);
+ pc = q->pc;
+ lc = q->line;
+ llc = lline;
+ }
+ }
+ flushunit(pc, unitstart);
+ linesize = cpos() - lineo;
+}
+
+/*
+ * Walk DWarfDebugInfoEntries, and emit .debug_info
+ */
+static void
+writeinfo(void)
+{
+ DWDie *compunit;
+ vlong unitstart;
+
+ reverselist(&dwinfo);
+
+ infoo = cpos();
+
+ for (compunit = dwinfo; compunit; compunit = compunit->link) {
+ unitstart = cpos();
+
+ // Write .debug_info Compilation Unit Header (sec 7.5.1)
+ // Fields marked with (*) must be changed for 64-bit dwarf
+ LPUT(0); // unit_length (*), will be filled in later.
+ WPUT(3); // version
+ LPUT(0); // debug_abbrev_offset (*)
+ cput(8); // address_size
+
+ putdie(compunit);
+
+ cflush();
+ vlong here = cpos();
+ seek(cout, unitstart, 0);
+ LPUT(here - unitstart - sizeof(int32));
+ cflush();
+ seek(cout, here, 0);
+ }
+
+ cflush();
+ infosize = cpos() - infoo;
+}
+
+/*
+ * Elf sections.
+ */
+enum {
+ ElfStrDebugAbbrev,
+ ElfStrDebugAranges,
+ ElfStrDebugFrame,
+ ElfStrDebugInfo,
+ ElfStrDebugLine,
+ ElfStrDebugLoc,
+ ElfStrDebugMacinfo,
+ ElfStrDebugPubNames,
+ ElfStrDebugPubTypes,
+ ElfStrDebugRanges,
+ ElfStrDebugStr,
+ NElfStrDbg
+};
+
+vlong elfstrdbg[NElfStrDbg];
+
+void
+dwarfaddshstrings(Sym * shstrtab)
+{
+ elfstrdbg[ElfStrDebugAbbrev] = addstring(shstrtab, ".debug_abbrev");
+ elfstrdbg[ElfStrDebugAranges] = addstring(shstrtab, ".debug_aranges");
+ elfstrdbg[ElfStrDebugFrame] = addstring(shstrtab, ".debug_frame");
+ elfstrdbg[ElfStrDebugInfo] = addstring(shstrtab, ".debug_info");
+ elfstrdbg[ElfStrDebugLine] = addstring(shstrtab, ".debug_line");
+ elfstrdbg[ElfStrDebugLoc] = addstring(shstrtab, ".debug_loc");
+ elfstrdbg[ElfStrDebugMacinfo] = addstring(shstrtab, ".debug_macinfo");
+ elfstrdbg[ElfStrDebugPubNames] = addstring(shstrtab, ".debug_pubnames");
+ elfstrdbg[ElfStrDebugPubTypes] = addstring(shstrtab, ".debug_pubtypes");
+ elfstrdbg[ElfStrDebugRanges] = addstring(shstrtab, ".debug_ranges");
+ elfstrdbg[ElfStrDebugStr] = addstring(shstrtab, ".debug_str");
+}
+
+void
+dwarfemitdebugsections(void)
+{
+ writeabbrev();
+ writelines();
+ writeinfo();
+}
+
+void
+dwarfaddheaders(void)
+{
+ ElfShdr *sh;
+
+ sh = newElfShdr(elfstrdbg[ElfStrDebugAbbrev]);
+ sh->type = SHT_PROGBITS;
+ sh->off = abbrevo;
+ sh->size = abbrevsize;
+ sh->addralign = 1;
+
+ sh = newElfShdr(elfstrdbg[ElfStrDebugLine]);
+ sh->type = SHT_PROGBITS;
+ sh->off = lineo;
+ sh->size = linesize;
+ sh->addralign = 1;
+
+ sh = newElfShdr(elfstrdbg[ElfStrDebugInfo]);
+ sh->type = SHT_PROGBITS;
+ sh->off = infoo;
+ sh->size = infosize;
+ sh->addralign = 1;
+}
diff --git a/src/cmd/ld/dwarf.h b/src/cmd/ld/dwarf.h
new file mode 100644
index 0000000..fae38af
--- /dev/null
+++ b/src/cmd/ld/dwarf.h
@@ -0,0 +1,28 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+
+/*
+ * Register 'f' symbol file fragments. Doing this while parsing the
+ * .6 input saves a pass over the symbol table later.
+ */
+void dwarfaddfrag(int n, char* frag);
+
+/*
+ * Add the dwarf section names to the ELF
+ * s[ection]h[eader]str[ing]tab.
+ */
+void dwarfaddshstrings(Sym *shstrtab);
+
+/*
+ * Emit debug_abbrevs, debug_info and debug_line sections to current
+ * offset in cout.
+ */
+void dwarfemitdebugsections(void);
+
+/*
+ * Add ELF section headers pointing to the sections emitted in
+ * dwarfemitdebugsections.
+ */
+void dwarfaddheaders(void);
diff --git a/src/cmd/ld/dwarf_defs.h b/src/cmd/ld/dwarf_defs.h
new file mode 100644
index 0000000..7bff4fb
--- /dev/null
+++ b/src/cmd/ld/dwarf_defs.h
@@ -0,0 +1,454 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Cut, pasted, tr-and-awk'ed from tables in
+// http://dwarfstd.org/doc/Dwarf3.pdf
+
+// Table 18
+enum
+{
+ 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_parameter = 0x2f,
+ DW_TAG_template_value_parameter = 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,
+ 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,
+ DW_TAG_condition = 0x3f,
+ DW_TAG_shared_type = 0x40,
+ DW_TAG_lo_user = 0x4080,
+ DW_TAG_hi_user = 0xffff,
+
+};
+
+// Table 19
+enum
+{
+ DW_CHILDREN_no = 0x00,
+ DW_CHILDREN_yes = 0x01,
+};
+
+// Not from the spec, but logicaly belongs here
+enum
+{
+ DW_CLS_ADDRESS = 0x01,
+ DW_CLS_BLOCK,
+ DW_CLS_CONSTANT,
+ DW_CLS_FLAG,
+ DW_CLS_PTR, // lineptr, loclistptr, macptr, rangelistptr
+ DW_CLS_REFERENCE,
+ DW_CLS_STRING
+};
+
+// Table 20
+enum
+{
+ DW_AT_sibling = 0x01, // reference
+ DW_AT_location = 0x02, // block, loclistptr
+ DW_AT_name = 0x03, // string
+ DW_AT_ordering = 0x09, // constant
+ DW_AT_byte_size = 0x0b, // block, constant, reference
+ DW_AT_bit_offset = 0x0c, // block, constant, reference
+ DW_AT_bit_size = 0x0d, // block, constant, reference
+ DW_AT_stmt_list = 0x10, // lineptr
+ DW_AT_low_pc = 0x11, // address
+ DW_AT_high_pc = 0x12, // address
+ DW_AT_language = 0x13, // constant
+ DW_AT_discr = 0x15, // reference
+ DW_AT_discr_value = 0x16, // constant
+ DW_AT_visibility = 0x17, // constant
+ DW_AT_import = 0x18, // reference
+ DW_AT_string_length = 0x19, // block, loclistptr
+ DW_AT_common_reference = 0x1a, // reference
+ DW_AT_comp_dir = 0x1b, // string
+ DW_AT_const_value = 0x1c, // block, constant, string
+ DW_AT_containing_type = 0x1d, // reference
+ DW_AT_default_value = 0x1e, // reference
+ DW_AT_inline = 0x20, // constant
+ DW_AT_is_optional = 0x21, // flag
+ DW_AT_lower_bound = 0x22, // block, constant, reference
+ DW_AT_producer = 0x25, // string
+ DW_AT_prototyped = 0x27, // flag
+ DW_AT_return_addr = 0x2a, // block, loclistptr
+ DW_AT_start_scope = 0x2c, // constant
+ DW_AT_bit_stride = 0x2e, // constant
+ DW_AT_upper_bound = 0x2f, // block, constant, reference
+ DW_AT_abstract_origin = 0x31, // reference
+ DW_AT_accessibility = 0x32, // constant
+ DW_AT_address_class = 0x33, // constant
+ DW_AT_artificial = 0x34, // flag
+ DW_AT_base_types = 0x35, // reference
+ DW_AT_calling_convention = 0x36, // constant
+ DW_AT_count = 0x37, // block, constant, reference
+ DW_AT_data_member_location = 0x38, // block, constant, loclistptr
+ DW_AT_decl_column = 0x39, // constant
+ DW_AT_decl_file = 0x3a, // constant
+ DW_AT_decl_line = 0x3b, // constant
+ DW_AT_declaration = 0x3c, // flag
+ DW_AT_discr_list = 0x3d, // block
+ DW_AT_encoding = 0x3e, // constant
+ DW_AT_external = 0x3f, // flag
+ DW_AT_frame_base = 0x40, // block, loclistptr
+ DW_AT_friend = 0x41, // reference
+ DW_AT_identifier_case = 0x42, // constant
+ DW_AT_macro_info = 0x43, // macptr
+ DW_AT_namelist_item = 0x44, // block
+ DW_AT_priority = 0x45, // reference
+ DW_AT_segment = 0x46, // block, loclistptr
+ DW_AT_specification = 0x47, // reference
+ DW_AT_static_link = 0x48, // block, loclistptr
+ DW_AT_type = 0x49, // reference
+ DW_AT_use_location = 0x4a, // block, loclistptr
+ DW_AT_variable_parameter = 0x4b, // flag
+ DW_AT_virtuality = 0x4c, // constant
+ DW_AT_vtable_elem_location = 0x4d, // block, loclistptr
+ DW_AT_allocated = 0x4e, // block, constant, reference
+ DW_AT_associated = 0x4f, // block, constant, reference
+ DW_AT_data_location = 0x50, // block
+ DW_AT_byte_stride = 0x51, // block, constant, reference
+ DW_AT_entry_pc = 0x52, // address
+ DW_AT_use_UTF8 = 0x53, // flag
+ DW_AT_extension = 0x54, // reference
+ DW_AT_ranges = 0x55, // rangelistptr
+ DW_AT_trampoline = 0x56, // address, flag, reference, string
+ DW_AT_call_column = 0x57, // constant
+ DW_AT_call_file = 0x58, // constant
+ DW_AT_call_line = 0x59, // constant
+ DW_AT_description = 0x5a, // string
+ DW_AT_binary_scale = 0x5b, // constant
+ DW_AT_decimal_scale = 0x5c, // constant
+ DW_AT_small = 0x5d, // reference
+ DW_AT_decimal_sign = 0x5e, // constant
+ DW_AT_digit_count = 0x5f, // constant
+ DW_AT_picture_string = 0x60, // string
+ DW_AT_mutable = 0x61, // flag
+ DW_AT_threads_scaled = 0x62, // flag
+ DW_AT_explicit = 0x63, // flag
+ DW_AT_object_pointer = 0x64, // reference
+ DW_AT_endianity = 0x65, // constant
+ DW_AT_elemental = 0x66, // flag
+ DW_AT_pure = 0x67, // flag
+ DW_AT_recursive = 0x68, // flag
+ DW_AT_lo_user = 0x2000, // ---
+ DW_AT_hi_user = 0x3fff, // ---
+
+};
+
+// Table 21
+enum
+{
+ DW_FORM_addr = 0x01, // address
+ DW_FORM_block2 = 0x03, // block
+ DW_FORM_block4 = 0x04, // block
+ DW_FORM_data2 = 0x05, // constant
+ DW_FORM_data4 = 0x06, // constant, lineptr, loclistptr, macptr, rangelistptr
+ DW_FORM_data8 = 0x07, // constant, lineptr, loclistptr, macptr, rangelistptr
+ DW_FORM_string = 0x08, // string
+ DW_FORM_block = 0x09, // block
+ DW_FORM_block1 = 0x0a, // block
+ DW_FORM_data1 = 0x0b, // constant
+ DW_FORM_flag = 0x0c, // flag
+ DW_FORM_sdata = 0x0d, // constant
+ DW_FORM_strp = 0x0e, // string
+ DW_FORM_udata = 0x0f, // constant
+ DW_FORM_ref_addr = 0x10, // reference
+ DW_FORM_ref1 = 0x11, // reference
+ DW_FORM_ref2 = 0x12, // reference
+ DW_FORM_ref4 = 0x13, // reference
+ DW_FORM_ref8 = 0x14, // reference
+ DW_FORM_ref_udata = 0x15, // reference
+ DW_FORM_indirect = 0x16, // (see Section 7.5.3)
+};
+
+// Table 24 (#operands, notes)
+enum
+{
+ DW_OP_addr = 0x03, // 1 constant address (size target specific)
+ DW_OP_deref = 0x06, // 0
+ DW_OP_const1u = 0x08, // 1 1-byte constant
+ DW_OP_const1s = 0x09, // 1 1-byte constant
+ DW_OP_const2u = 0x0a, // 1 2-byte constant
+ DW_OP_const2s = 0x0b, // 1 2-byte constant
+ DW_OP_const4u = 0x0c, // 1 4-byte constant
+ DW_OP_const4s = 0x0d, // 1 4-byte constant
+ DW_OP_const8u = 0x0e, // 1 8-byte constant
+ DW_OP_const8s = 0x0f, // 1 8-byte constant
+ DW_OP_constu = 0x10, // 1 ULEB128 constant
+ DW_OP_consts = 0x11, // 1 SLEB128 constant
+ DW_OP_dup = 0x12, // 0
+ DW_OP_drop = 0x13, // 0
+ DW_OP_over = 0x14, // 0
+ DW_OP_pick = 0x15, // 1 1-byte stack index
+ DW_OP_swap = 0x16, // 0
+ DW_OP_rot = 0x17, // 0
+ DW_OP_xderef = 0x18, // 0
+ DW_OP_abs = 0x19, // 0
+ DW_OP_and = 0x1a, // 0
+ DW_OP_div = 0x1b, // 0
+ DW_OP_minus = 0x1c, // 0
+ DW_OP_mod = 0x1d, // 0
+ DW_OP_mul = 0x1e, // 0
+ DW_OP_neg = 0x1f, // 0
+ DW_OP_not = 0x20, // 0
+ DW_OP_or = 0x21, // 0
+ DW_OP_plus = 0x22, // 0
+ DW_OP_plus_uconst = 0x23, // 1 ULEB128 addend
+ DW_OP_shl = 0x24, // 0
+ DW_OP_shr = 0x25, // 0
+ DW_OP_shra = 0x26, // 0
+ DW_OP_xor = 0x27, // 0
+ DW_OP_skip = 0x2f, // 1 signed 2-byte constant
+ DW_OP_bra = 0x28, // 1 signed 2-byte constant
+ DW_OP_eq = 0x29, // 0
+ DW_OP_ge = 0x2a, // 0
+ DW_OP_gt = 0x2b, // 0
+ DW_OP_le = 0x2c, // 0
+ DW_OP_lt = 0x2d, // 0
+ DW_OP_ne = 0x2e, // 0
+ DW_OP_lit0 = 0x30, // 0 ...
+ DW_OP_lit31 = 0x4f, // 0 literals 0..31 = (DW_OP_lit0 +
+ // literal)
+ DW_OP_reg0 = 0x50, // 0 ..
+ DW_OP_reg31 = 0x6f, // 0 reg 0..31 = (DW_OP_reg0 + regnum)
+ DW_OP_breg0 = 0x70, // 1 ...
+ DW_OP_breg31 = 0x8f, // 1 SLEB128 offset base register 0..31 = (DW_OP_breg0 + regnum)
+ DW_OP_regx = 0x90, // 1 ULEB128 register
+ DW_OP_fbreg = 0x91, // 1 SLEB128 offset
+ DW_OP_bregx = 0x92, // 2 ULEB128 register followed by SLEB128 offset
+ DW_OP_piece = 0x93, // 1 ULEB128 size of piece addressed
+ DW_OP_deref_size = 0x94, // 1 1-byte size of data retrieved
+ DW_OP_xderef_size = 0x95, // 1 1-byte size of data retrieved
+ DW_OP_nop = 0x96, // 0
+ DW_OP_push_object_address = 0x97, // 0
+ DW_OP_call2 = 0x98, // 1 2-byte offset of DIE
+ DW_OP_call4 = 0x99, // 1 4-byte offset of DIE
+ DW_OP_call_ref = 0x9a, // 1 4- or 8-byte offset of DIE
+ DW_OP_form_tls_address = 0x9b, // 0
+ DW_OP_call_frame_cfa = 0x9c, // 0
+ DW_OP_bit_piece = 0x9d, // 2
+ DW_OP_lo_user = 0xe0,
+ DW_OP_hi_user = 0xff,
+};
+
+// Table 25
+enum
+{
+ DW_ATE_address = 0x01,
+ DW_ATE_boolean = 0x02,
+ DW_ATE_complex_float = 0x03,
+ DW_ATE_float = 0x04,
+ DW_ATE_signed = 0x05,
+ DW_ATE_signed_char = 0x06,
+ DW_ATE_unsigned = 0x07,
+ DW_ATE_unsigned_char = 0x08,
+ DW_ATE_imaginary_float = 0x09,
+ DW_ATE_packed_decimal = 0x0a,
+ DW_ATE_numeric_string = 0x0b,
+ DW_ATE_edited = 0x0c,
+ DW_ATE_signed_fixed = 0x0d,
+ DW_ATE_unsigned_fixed = 0x0e,
+ DW_ATE_decimal_float = 0x0f,
+ DW_ATE_lo_user = 0x80,
+ DW_ATE_hi_user = 0xff,
+};
+
+// Table 26
+enum
+{
+ DW_DS_unsigned = 0x01,
+ DW_DS_leading_overpunch = 0x02,
+ DW_DS_trailing_overpunch = 0x03,
+ DW_DS_leading_separate = 0x04,
+ DW_DS_trailing_separate = 0x05,
+};
+
+// Table 27
+enum
+{
+ DW_END_default = 0x00,
+ DW_END_big = 0x01,
+ DW_END_little = 0x02,
+ DW_END_lo_user = 0x40,
+ DW_END_hi_user = 0xff,
+};
+
+// Table 28
+enum
+{
+ DW_ACCESS_public = 0x01,
+ DW_ACCESS_protected = 0x02,
+ DW_ACCESS_private = 0x03,
+};
+
+// Table 29
+enum
+{
+ DW_VIS_local = 0x01,
+ DW_VIS_exported = 0x02,
+ DW_VIS_qualified = 0x03,
+};
+
+// Table 30
+enum
+{
+ DW_VIRTUALITY_none = 0x00,
+ DW_VIRTUALITY_virtual = 0x01,
+ DW_VIRTUALITY_pure_virtual = 0x02,
+};
+
+// Table 31
+enum
+{
+ 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,
+ DW_LANG_C99 = 0x000c,
+ DW_LANG_Ada95 = 0x000d,
+ DW_LANG_Fortran95 = 0x000e,
+ DW_LANG_PLI = 0x000f,
+ DW_LANG_ObjC = 0x0010,
+ DW_LANG_ObjC_plus_plus = 0x0011,
+ DW_LANG_UPC = 0x0012,
+ DW_LANG_D = 0x0013,
+ DW_LANG_Python = 0x0014, // DWARF4
+
+ DW_LANG_lo_user = 0x8000,
+ DW_LANG_Go = 0x8015, // TODO(lvd) Temporary
+ DW_LANG_hi_user = 0xffff,
+};
+
+// Table 32
+enum
+{
+ DW_ID_case_sensitive = 0x00,
+ DW_ID_up_case = 0x01,
+ DW_ID_down_case = 0x02,
+ DW_ID_case_insensitive = 0x03,
+};
+
+// Table 33
+enum
+{
+ DW_CC_normal = 0x01,
+ DW_CC_program = 0x02,
+ DW_CC_nocall = 0x03,
+ DW_CC_lo_user = 0x40,
+ DW_CC_hi_user = 0xff,
+};
+
+// Table 34
+enum
+{
+ DW_INL_not_inlined = 0x00,
+ DW_INL_inlined = 0x01,
+ DW_INL_declared_not_inlined = 0x02,
+ DW_INL_declared_inlined = 0x03,
+};
+
+// Table 35
+enum
+{
+ DW_ORD_row_major = 0x00,
+ DW_ORD_col_major = 0x01,
+};
+
+// Table 36
+enum
+{
+ DW_DSC_label = 0x00,
+ DW_DSC_range = 0x01,
+};
+
+// Table 37
+enum
+{
+ DW_LNS_copy = 0x01,
+ DW_LNS_advance_pc = 0x02,
+ DW_LNS_advance_line = 0x03,
+ DW_LNS_set_file = 0x04,
+ DW_LNS_set_column = 0x05,
+ DW_LNS_negate_stmt = 0x06,
+ DW_LNS_set_basic_block = 0x07,
+ DW_LNS_const_add_pc = 0x08,
+ DW_LNS_fixed_advance_pc = 0x09,
+ DW_LNS_set_prologue_end = 0x0a,
+ DW_LNS_set_epilogue_begin = 0x0b,
+ DW_LNS_set_isa = 0x0c,
+};
+
+// Table 38
+enum
+{
+ DW_LNE_end_sequence = 0x01,
+ DW_LNE_set_address = 0x02,
+ DW_LNE_define_file = 0x03,
+ DW_LNE_lo_user = 0x80,
+ DW_LNE_hi_user = 0xff,
+};
+
+// Table 39
+enum
+{
+ DW_MACINFO_define = 0x01,
+ DW_MACINFO_undef = 0x02,
+ DW_MACINFO_start_file = 0x03,
+ DW_MACINFO_end_file = 0x04,
+ DW_MACINFO_vendor_ext = 0xff,
+};
