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-rw-r--r--src/cmd/5l/asm.c52
-rw-r--r--src/cmd/5l/span.c2
-rw-r--r--src/cmd/6l/asm.c65
-rw-r--r--src/cmd/8l/asm.c72
-rw-r--r--src/cmd/ld/data.c48
-rw-r--r--src/cmd/ld/elf.c35
-rw-r--r--src/cmd/ld/lib.h3
-rw-r--r--src/cmd/ld/pe.c2
-rw-r--r--src/pkg/debug/elf/file_test.go29
9 files changed, 185 insertions, 123 deletions
diff --git a/src/cmd/5l/asm.c b/src/cmd/5l/asm.c
index b820cc7082..8a60ff74a9 100644
--- a/src/cmd/5l/asm.c
+++ b/src/cmd/5l/asm.c
@@ -157,7 +157,7 @@ doelf(void)
/* predefine strings we need for section headers */
shstrtab = lookup(".shstrtab", 0);
- shstrtab->type = SELFDATA;
+ shstrtab->type = SELFROSECT;
shstrtab->reachable = 1;
elfstr[ElfStrEmpty] = addstring(shstrtab, "");
@@ -186,19 +186,22 @@ doelf(void)
elfstr[ElfStrPlt] = addstring(shstrtab, ".plt");
/* interpreter string */
+ if(interpreter == nil)
+ interpreter = linuxdynld;
s = lookup(".interp", 0);
+ s->type = SELFROSECT;
s->reachable = 1;
- s->type = SELFDATA; // TODO: rodata
+ addstring(s, interpreter);
/* dynamic symbol table - first entry all zeros */
s = lookup(".dynsym", 0);
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s->reachable = 1;
s->value += ELF32SYMSIZE;
/* dynamic string table */
s = lookup(".dynstr", 0);
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s->reachable = 1;
if(s->size == 0)
addstring(s, "");
@@ -207,37 +210,37 @@ doelf(void)
/* relocation table */
s = lookup(".rel", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
/* global offset table */
s = lookup(".got", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFSECT; // writable
/* hash */
s = lookup(".hash", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
/* got.plt */
s = lookup(".got.plt", 0);
s->reachable = 1;
- s->type = SDATA; // writable, so not SELFDATA
+ s->type = SELFSECT; // writable
s = lookup(".plt", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s = lookup(".rel.plt", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
elfsetupplt();
/* define dynamic elf table */
s = lookup(".dynamic", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
/*
* .dynamic table
@@ -274,8 +277,11 @@ datoff(vlong addr)
void
shsym(Elf64_Shdr *sh, Sym *s)
{
- sh->addr = symaddr(s);
- sh->off = datoff(sh->addr);
+ vlong addr;
+ addr = symaddr(s);
+ if(sh->flags&SHF_ALLOC)
+ sh->addr = addr;
+ sh->off = datoff(addr);
sh->size = s->size;
}
@@ -331,7 +337,7 @@ asmb(void)
if(iself) {
/* index of elf text section; needed by asmelfsym, double-checked below */
/* !debug['d'] causes extra sections before the .text section */
- elftextsh = 1;
+ elftextsh = 2;
if(!debug['d']) {
elftextsh += 10;
if(elfverneed)
@@ -486,9 +492,7 @@ asmb(void)
sh->type = SHT_PROGBITS;
sh->flags = SHF_ALLOC;
sh->addralign = 1;
- if(interpreter == nil)
- interpreter = linuxdynld;
- elfinterp(sh, startva, interpreter);
+ shsym(sh, lookup(".interp", 0));
ph = newElfPhdr();
ph->type = PT_INTERP;
@@ -579,6 +583,11 @@ asmb(void)
ph->flags = PF_W+PF_R;
ph->align = 4;
+ sh = newElfShstrtab(elfstr[ElfStrShstrtab]);
+ sh->type = SHT_STRTAB;
+ sh->addralign = 1;
+ shsym(sh, lookup(".shstrtab", 0));
+
if(elftextsh != eh->shnum)
diag("elftextsh = %d, want %d", elftextsh, eh->shnum);
for(sect=segtext.sect; sect!=nil; sect=sect->next)
@@ -604,11 +613,6 @@ asmb(void)
// dwarfaddelfheaders();
}
- sh = newElfShstrtab(elfstr[ElfStrShstrtab]);
- sh->type = SHT_STRTAB;
- sh->addralign = 1;
- shsym(sh, lookup(".shstrtab", 0));
-
/* Main header */
eh->ident[EI_MAG0] = '\177';
eh->ident[EI_MAG1] = 'E';
@@ -634,7 +638,7 @@ asmb(void)
a += elfwritephdrs();
a += elfwriteshdrs();
cflush();
- if(a+elfwriteinterp() > ELFRESERVE)
+ if(a > ELFRESERVE)
diag("ELFRESERVE too small: %d > %d", a, ELFRESERVE);
break;
}
@@ -1825,7 +1829,7 @@ genasmsym(void (*put)(Sym*, char*, int, vlong, vlong, int, Sym*))
case SCONST:
case SRODATA:
case SDATA:
- case SELFDATA:
+ case SELFROSECT:
case STYPE:
case SSTRING:
case SGOSTRING:
diff --git a/src/cmd/5l/span.c b/src/cmd/5l/span.c
index 338c9665bf..2e1232a1a1 100644
--- a/src/cmd/5l/span.c
+++ b/src/cmd/5l/span.c
@@ -416,7 +416,7 @@ symaddr(Sym *s)
return 0;
case STEXT:
- case SELFDATA:
+ case SELFROSECT:
case SRODATA:
case SDATA:
case SBSS:
diff --git a/src/cmd/6l/asm.c b/src/cmd/6l/asm.c
index 723ac0efe3..fb088fd9ee 100644
--- a/src/cmd/6l/asm.c
+++ b/src/cmd/6l/asm.c
@@ -559,7 +559,7 @@ doelf(void)
/* predefine strings we need for section headers */
shstrtab = lookup(".shstrtab", 0);
- shstrtab->type = SELFDATA;
+ shstrtab->type = SELFROSECT;
shstrtab->reachable = 1;
elfstr[ElfStrEmpty] = addstring(shstrtab, "");
@@ -591,15 +591,31 @@ doelf(void)
elfstr[ElfStrGnuVersion] = addstring(shstrtab, ".gnu.version");
elfstr[ElfStrGnuVersionR] = addstring(shstrtab, ".gnu.version_r");
+ /* interpreter string */
+ if(interpreter == nil) {
+ switch(HEADTYPE) {
+ case Hlinux:
+ interpreter = linuxdynld;
+ break;
+ case Hfreebsd:
+ interpreter = freebsddynld;
+ break;
+ }
+ }
+ s = lookup(".interp", 0);
+ s->type = SELFROSECT;
+ s->reachable = 1;
+ addstring(s, interpreter);
+
/* dynamic symbol table - first entry all zeros */
s = lookup(".dynsym", 0);
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s->reachable = 1;
s->size += ELF64SYMSIZE;
/* dynamic string table */
s = lookup(".dynstr", 0);
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s->reachable = 1;
if(s->size == 0)
addstring(s, "");
@@ -608,44 +624,44 @@ doelf(void)
/* relocation table */
s = lookup(".rela", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
/* global offset table */
s = lookup(".got", 0);
s->reachable = 1;
- s->type = SDATA; // writable, so not SELFDATA
+ s->type = SELFSECT; // writable
/* hash */
s = lookup(".hash", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s = lookup(".got.plt", 0);
s->reachable = 1;
- s->type = SDATA; // writable, not SELFDATA
+ s->type = SELFSECT; // writable
s = lookup(".plt", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
elfsetupplt();
s = lookup(".rela.plt", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s = lookup(".gnu.version", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s = lookup(".gnu.version_r", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
/* define dynamic elf table */
s = lookup(".dynamic", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
/*
* .dynamic table
@@ -673,8 +689,11 @@ doelf(void)
void
shsym(ElfShdr *sh, Sym *s)
{
- sh->addr = symaddr(s);
- sh->off = datoff(sh->addr);
+ vlong addr;
+ addr = symaddr(s);
+ if(sh->flags&SHF_ALLOC)
+ sh->addr = addr;
+ sh->off = datoff(addr);
sh->size = s->size;
}
@@ -746,7 +765,7 @@ asmb(void)
debug['8'] = 1; /* 64-bit addresses */
/* index of elf text section; needed by asmelfsym, double-checked below */
/* !debug['d'] causes extra sections before the .text section */
- elftextsh = 1;
+ elftextsh = 2;
if(!debug['d']) {
elftextsh += 10;
if(elfverneed)
@@ -890,7 +909,7 @@ asmb(void)
break;
}
}
- elfinterp(sh, startva, interpreter);
+ shsym(sh, lookup(".interp", 0));
ph = newElfPhdr();
ph->type = PT_INTERP;
@@ -1014,6 +1033,11 @@ asmb(void)
ph->flags = PF_W+PF_R;
ph->align = 8;
+ sh = newElfShstrtab(elfstr[ElfStrShstrtab]);
+ sh->type = SHT_STRTAB;
+ sh->addralign = 1;
+ shsym(sh, lookup(".shstrtab", 0));
+
if(elftextsh != eh->shnum)
diag("elftextsh = %d, want %d", elftextsh, eh->shnum);
for(sect=segtext.sect; sect!=nil; sect=sect->next)
@@ -1039,11 +1063,6 @@ asmb(void)
dwarfaddelfheaders();
}
- sh = newElfShstrtab(elfstr[ElfStrShstrtab]);
- sh->type = SHT_STRTAB;
- sh->addralign = 1;
- shsym(sh, lookup(".shstrtab", 0));
-
/* Main header */
eh->ident[EI_MAG0] = '\177';
eh->ident[EI_MAG1] = 'E';
@@ -1069,7 +1088,7 @@ asmb(void)
a += elfwritephdrs();
a += elfwriteshdrs();
cflush();
- if(a+elfwriteinterp() > ELFRESERVE)
+ if(a > ELFRESERVE)
diag("ELFRESERVE too small: %d > %d", a, ELFRESERVE);
break;
case Hwindows:
@@ -1111,7 +1130,7 @@ genasmsym(void (*put)(Sym*, char*, int, vlong, vlong, int, Sym*))
case SCONST:
case SRODATA:
case SDATA:
- case SELFDATA:
+ case SELFROSECT:
case SMACHOGOT:
case STYPE:
case SSTRING:
diff --git a/src/cmd/8l/asm.c b/src/cmd/8l/asm.c
index 1832b3767b..5d49628588 100644
--- a/src/cmd/8l/asm.c
+++ b/src/cmd/8l/asm.c
@@ -519,7 +519,7 @@ doelf(void)
/* predefine strings we need for section headers */
shstrtab = lookup(".shstrtab", 0);
- shstrtab->type = SELFDATA;
+ shstrtab->type = SELFROSECT;
shstrtab->reachable = 1;
elfstr[ElfStrEmpty] = addstring(shstrtab, "");
@@ -552,20 +552,31 @@ doelf(void)
elfstr[ElfStrGnuVersionR] = addstring(shstrtab, ".gnu.version_r");
/* interpreter string */
+ if(interpreter == nil) {
+ switch(HEADTYPE) {
+ case Hlinux:
+ interpreter = linuxdynld;
+ break;
+ case Hfreebsd:
+ interpreter = freebsddynld;
+ break;
+ }
+ }
s = lookup(".interp", 0);
+ s->type = SELFROSECT;
s->reachable = 1;
- s->type = SELFDATA;
+ addstring(s, interpreter);
/* dynamic symbol table - first entry all zeros */
s = lookup(".dynsym", 0);
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s->reachable = 1;
s->size += ELF32SYMSIZE;
/* dynamic string table */
s = lookup(".dynstr", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
if(s->size == 0)
addstring(s, "");
dynstr = s;
@@ -573,45 +584,45 @@ doelf(void)
/* relocation table */
s = lookup(".rel", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
/* global offset table */
s = lookup(".got", 0);
s->reachable = 1;
- s->type = SDATA; // writable, so not SELFDATA
+ s->type = SELFSECT; // writable
/* hash */
s = lookup(".hash", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
/* got.plt */
s = lookup(".got.plt", 0);
s->reachable = 1;
- s->type = SDATA; // writable, so not SELFDATA
+ s->type = SELFSECT; // writable
s = lookup(".plt", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s = lookup(".rel.plt", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s = lookup(".gnu.version", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s = lookup(".gnu.version_r", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
elfsetupplt();
/* define dynamic elf table */
s = lookup(".dynamic", 0);
s->reachable = 1;
- s->type = SELFDATA;
+ s->type = SELFROSECT;
/*
* .dynamic table
@@ -638,8 +649,11 @@ doelf(void)
void
shsym(Elf64_Shdr *sh, Sym *s)
{
- sh->addr = symaddr(s);
- sh->off = datoff(sh->addr);
+ vlong addr;
+ addr = symaddr(s);
+ if(sh->flags&SHF_ALLOC)
+ sh->addr = addr;
+ sh->off = datoff(addr);
sh->size = s->size;
}
@@ -696,7 +710,7 @@ asmb(void)
if(iself) {
/* index of elf text section; needed by asmelfsym, double-checked below */
/* !debug['d'] causes extra sections before the .text section */
- elftextsh = 1;
+ elftextsh = 2;
if(!debug['d']) {
elftextsh += 10;
if(elfverneed)
@@ -950,17 +964,7 @@ asmb(void)
sh->type = SHT_PROGBITS;
sh->flags = SHF_ALLOC;
sh->addralign = 1;
- if(interpreter == nil) {
- switch(HEADTYPE) {
- case Hlinux:
- interpreter = linuxdynld;
- break;
- case Hfreebsd:
- interpreter = freebsddynld;
- break;
- }
- }
- elfinterp(sh, startva, interpreter);
+ shsym(sh, lookup(".interp", 0));
ph = newElfPhdr();
ph->type = PT_INTERP;
@@ -1084,6 +1088,11 @@ asmb(void)
ph->flags = PF_W+PF_R;
ph->align = 4;
+ sh = newElfShstrtab(elfstr[ElfStrShstrtab]);
+ sh->type = SHT_STRTAB;
+ sh->addralign = 1;
+ shsym(sh, lookup(".shstrtab", 0));
+
if(elftextsh != eh->shnum)
diag("elftextsh = %d, want %d", elftextsh, eh->shnum);
for(sect=segtext.sect; sect!=nil; sect=sect->next)
@@ -1109,11 +1118,6 @@ asmb(void)
dwarfaddelfheaders();
}
- sh = newElfShstrtab(elfstr[ElfStrShstrtab]);
- sh->type = SHT_STRTAB;
- sh->addralign = 1;
- shsym(sh, lookup(".shstrtab", 0));
-
/* Main header */
eh->ident[EI_MAG0] = '\177';
eh->ident[EI_MAG1] = 'E';
@@ -1144,7 +1148,7 @@ asmb(void)
a += elfwritephdrs();
a += elfwriteshdrs();
cflush();
- if(a+elfwriteinterp() > ELFRESERVE)
+ if(a > ELFRESERVE)
diag("ELFRESERVE too small: %d > %d", a, ELFRESERVE);
break;
@@ -1200,7 +1204,7 @@ genasmsym(void (*put)(Sym*, char*, int, vlong, vlong, int, Sym*))
case SCONST:
case SRODATA:
case SDATA:
- case SELFDATA:
+ case SELFROSECT:
case SMACHO:
case SMACHOGOT:
case STYPE:
diff --git a/src/cmd/ld/data.c b/src/cmd/ld/data.c
index 9974dbc513..5cf5f4d7a0 100644
--- a/src/cmd/ld/data.c
+++ b/src/cmd/ld/data.c
@@ -821,9 +821,8 @@ dodata(void)
s = datap;
for(; s != nil && s->type < SSYMTAB; s = s->next) {
s->type = SRODATA;
- t = rnd(s->size, PtrSize);
s->value = datsize;
- datsize += t;
+ datsize += rnd(s->size, PtrSize);
}
sect->len = datsize - sect->vaddr;
@@ -836,19 +835,41 @@ dodata(void)
datsize += s->size;
}
sect->len = datsize - sect->vaddr;
+ datsize = rnd(datsize, PtrSize);
/* gopclntab */
sect = addsection(&segtext, ".gopclntab", 04);
sect->vaddr = datsize;
- for(; s != nil && s->type < SDATA; s = s->next) {
+ for(; s != nil && s->type < SELFROSECT; s = s->next) {
s->type = SRODATA;
s->value = datsize;
datsize += s->size;
}
sect->len = datsize - sect->vaddr;
+ datsize = rnd(datsize, PtrSize);
- /* data */
+ /* read-only ELF sections */
+ for(; s != nil && s->type < SELFSECT; s = s->next) {
+ sect = addsection(&segtext, s->name, 04);
+ sect->vaddr = datsize;
+ s->type = SRODATA;
+ s->value = datsize;
+ datsize += rnd(s->size, PtrSize);
+ sect->len = datsize - sect->vaddr;
+ }
+
+ /* writable ELF sections */
datsize = 0;
+ for(; s != nil && s->type < SDATA; s = s->next) {
+ sect = addsection(&segdata, s->name, 06);
+ sect->vaddr = datsize;
+ s->type = SDATA;
+ s->value = datsize;
+ datsize += rnd(s->size, PtrSize);
+ sect->len = datsize - sect->vaddr;
+ }
+
+ /* data */
sect = addsection(&segdata, ".data", 06);
sect->vaddr = 0;
for(; s != nil && s->type < SBSS; s = s->next) {
@@ -950,38 +971,43 @@ address(void)
segtext.fileoff = HEADR;
for(s=segtext.sect; s != nil; s=s->next) {
s->vaddr = va;
- va += s->len;
- segtext.len = va - INITTEXT;
- va = rnd(va, INITRND);
+ va += rnd(s->len, PtrSize);
}
+ segtext.len = va - INITTEXT;
segtext.filelen = segtext.len;
+ va = rnd(va, INITRND);
+
segdata.rwx = 06;
segdata.vaddr = va;
segdata.fileoff = va - segtext.vaddr + segtext.fileoff;
+ segdata.filelen = 0;
if(HEADTYPE == Hwindows)
segdata.fileoff = segtext.fileoff + rnd(segtext.len, PEFILEALIGN);
if(HEADTYPE == Hplan9x32)
segdata.fileoff = segtext.fileoff + segtext.filelen;
+ data = nil;
for(s=segdata.sect; s != nil; s=s->next) {
s->vaddr = va;
va += s->len;
+ segdata.filelen += s->len;
segdata.len = va - segdata.vaddr;
+ if(strcmp(s->name, ".data") == 0)
+ data = s;
}
- segdata.filelen = segdata.sect->len; // assume .data is first
-
+ segdata.filelen -= data->next->len; // deduct .bss
+
text = segtext.sect;
rodata = text->next;
symtab = rodata->next;
pclntab = symtab->next;
- data = segdata.sect;
for(sym = datap; sym != nil; sym = sym->next) {
cursym = sym;
if(sym->type < SDATA)
sym->value += rodata->vaddr;
else
- sym->value += data->vaddr;
+ sym->value += segdata.sect->vaddr;
for(sub = sym->sub; sub != nil; sub = sub->sub)
sub->value += sym->value;
}
diff --git a/src/cmd/ld/elf.c b/src/cmd/ld/elf.c
index 9c72890d43..3fe8ba83a6 100644
--- a/src/cmd/ld/elf.c
+++ b/src/cmd/ld/elf.c
@@ -19,7 +19,6 @@ static int elf64;
static ElfEhdr hdr;
static ElfPhdr *phdr[NSECT];
static ElfShdr *shdr[NSECT];
-static char *interp;
typedef struct Elfstring Elfstring;
struct Elfstring
@@ -304,32 +303,6 @@ elfwritedynentsymsize(Sym *s, int tag, Sym *t)
addsize(s, t);
}
-int
-elfwriteinterp(void)
-{
- int n;
-
- if(interp == nil)
- return 0;
-
- n = strlen(interp)+1;
- cseek(ELFRESERVE-n);
- cwrite(interp, n);
- return n;
-}
-
-void
-elfinterp(ElfShdr *sh, uint64 startva, char *p)
-{
- int n;
-
- interp = p;
- n = strlen(interp)+1;
- sh->addr = startva + ELFRESERVE - n;
- sh->off = ELFRESERVE - n;
- sh->size = n;
-}
-
extern int nelfsym;
int elfverneed;
@@ -393,7 +366,7 @@ elfdynhash(void)
nsym = nelfsym;
s = lookup(".hash", 0);
- s->type = SELFDATA;
+ s->type = SELFROSECT;
s->reachable = 1;
i = nsym;
@@ -539,6 +512,12 @@ elfshbits(Section *sect)
return nil;
found:
+ for(i=0; i<hdr.shnum; i++) {
+ sh = shdr[i];
+ if(sh->name == off)
+ return sh;
+ }
+
sh = newElfShdr(off);
if(sect->vaddr < sect->seg->vaddr + sect->seg->filelen)
sh->type = SHT_PROGBITS;
diff --git a/src/cmd/ld/lib.h b/src/cmd/ld/lib.h
index e2b9858cb0..ee7eb87c00 100644
--- a/src/cmd/ld/lib.h
+++ b/src/cmd/ld/lib.h
@@ -34,7 +34,6 @@ enum
/* order here is order in output file */
STEXT,
- SELFDATA,
SMACHOPLT,
STYPE,
SSTRING,
@@ -42,6 +41,8 @@ enum
SRODATA,
SSYMTAB,
SPCLNTAB,
+ SELFROSECT,
+ SELFSECT,
SDATA,
SMACHO, /* Mach-O __nl_symbol_ptr */
SMACHOGOT,
diff --git a/src/cmd/ld/pe.c b/src/cmd/ld/pe.c
index d13801ac02..d235e33c13 100644
--- a/src/cmd/ld/pe.c
+++ b/src/cmd/ld/pe.c
@@ -396,7 +396,7 @@ dope(void)
/* relocation table */
rel = lookup(".rel", 0);
rel->reachable = 1;
- rel->type = SELFDATA;
+ rel->type = SELFROSECT;
initdynimport();
initdynexport();
diff --git a/src/pkg/debug/elf/file_test.go b/src/pkg/debug/elf/file_test.go
index 62e2f3b2df..451d3d5147 100644
--- a/src/pkg/debug/elf/file_test.go
+++ b/src/pkg/debug/elf/file_test.go
@@ -7,7 +7,10 @@ package elf
import (
"debug/dwarf"
"encoding/binary"
+ "net"
+ "os"
"reflect"
+ "runtime"
"testing"
)
@@ -210,3 +213,29 @@ func TestDWARFRelocations(t *testing.T) {
}
}
}
+
+func TestNoSectionOverlaps(t *testing.T) {
+ // Ensure 6l outputs sections without overlaps.
+ if runtime.GOOS != "linux" && runtime.GOOS != "freebsd" {
+ return // not ELF
+ }
+ _ = net.ResolveIPAddr // force dynamic linkage
+ f, err := Open(os.Args[0])
+ if err != nil {
+ t.Error(err)
+ return
+ }
+ for i, si := range f.Sections {
+ sih := si.SectionHeader
+ for j, sj := range f.Sections {
+ sjh := sj.SectionHeader
+ if i == j || sjh.Type == SHT_NOBITS || sih.Offset == sjh.Offset && sih.Size == 0 {
+ continue
+ }
+ if sih.Offset >= sjh.Offset && sih.Offset < sjh.Offset+sjh.Size {
+ t.Errorf("ld produced ELF with section %s within %s: 0x%x <= 0x%x..0x%x < 0x%x",
+ sih.Name, sjh.Name, sjh.Offset, sih.Offset, sih.Offset+sih.Size, sjh.Offset+sjh.Size)
+ }
+ }
+ }
+}
generated by cgit v1.3-6-g1900 (git 2.53.0) at 2026-04-17 19:31:37 +0000