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post-0.130 fixes

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This commit is contained in:
roland 2007-10-17 07:37:35 +00:00
parent 2dfc22c77b
commit 316b9cce3d
2 changed files with 421 additions and 1 deletions
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412
elfutils-0.130-fixes.patch Normal file
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@ -0,0 +1,412 @@
#
#
# patch "libdwfl/ChangeLog"
# from [5323e83f0ba1ae96c326f6d799ffe684e6f90939]
# to [e8ac39af4808defcc93f6f4e55f092cbdd1089e0]
#
# patch "libdwfl/dwfl_module_build_id.c"
# from [ae14fc9f3be468ffff14b4f6247ad38898705132]
# to [c67b9be68b69c98f6fd1024f521acdab0678ea02]
#
# patch "libdwfl/dwfl_module_getsym.c"
# from [5596a4a3df363bb27759a0c26519b9818475aa80]
# to [c1a0448eecebc039393fb884ff7d0684d1d5001f]
#
# patch "libdwfl/dwfl_report_elf.c"
# from [d9db919b103fc3411d240f3a096af5e57a3adce6]
# to [ee4a17cd0e3bf27c306b484ab38c34a7de2b7c0e]
#
# patch "libdwfl/offline.c"
# from [1508fb5c96e46f5bf3bbdaa0e18921243cf2ab8b]
# to [d8dc43d35ecff3200099ec421a93cfadbd5a2e17]
#
# patch "libdwfl/relocate.c"
# from [5a08921fcd4b957b0d768e7a140eb5187dcaf69e]
# to [51258c3bf6a18602dbd3fd2d8b721d4f7a9aef60]
#
# patch "src/ChangeLog"
# from [18c1d13eb93bea8ea545811e1513cfa8fa207fa5]
# to [026cfbde5f235e169ca1aa4c5be156090254d137]
#
# patch "src/readelf.c"
# from [a0d9bd8c3fb36429895ee314dd3a874af3f8866e]
# to [06970982eff8d85287725619dd9eefc51c1bf1c0]
#
# patch "tests/ChangeLog"
# from [567abc0255271ddf2937bd3ebc5eebd8e0417d12]
# to [90ef947259192962a6242fab915f10059bef1b0c]
#
# patch "tests/test-subr.sh"
# from [5ba4008367c39437a8e8d6ed0b6757d54bc10f4d]
# to [ea1d0339bca3d875076ed15e114e9d47b2ea96e2]
#
============================================================
--- libdwfl/ChangeLog 5323e83f0ba1ae96c326f6d799ffe684e6f90939
+++ libdwfl/ChangeLog e8ac39af4808defcc93f6f4e55f092cbdd1089e0
@@ -1,3 +1,36 @@
+2007-10-17 Roland McGrath <roland@redhat.com>
+
+ * dwfl_module_getsym.c (dwfl_module_getsym): Apply MOD->symfile->bias
+ to relocated st_value.
+
+ * dwfl_report_elf.c (__libdwfl_report_elf): Align initial BASE for
+ ET_REL to 0x100.
+
+2007-10-16 Roland McGrath <roland@redhat.com>
+
+ * dwfl_report_elf.c (__libdwfl_report_elf): Readjust BASE when a later
+ section has larger alignment requirements not met by the original BASE,
+ rather than padding more between sections.
+
+ * dwfl_report_elf.c (__libdwfl_report_elf): Fix bias calculation.
+
+ * dwfl_module_build_id.c (__libdwfl_find_build_id): Apply module bias
+ to sh_addr value.
+
+ * dwfl_report_elf.c (__libdwfl_report_elf): Don't be confused by BASE
+ at zero in ET_REL case. Adjust BASE to necessary alignment.
+
+ * dwfl_module_build_id.c (check_notes): Take -1, not 0, as stub value
+ for DATA_VADDR.
+ (__libdwfl_find_build_id): Update caller.
+
+ * relocate.c (__libdwfl_relocate_value): Don't use sh_offset.
+ * dwfl_report_elf.c (__libdwfl_report_elf): Likewise.
+ * offline.c (dwfl_offline_section_address): Bail early if there is
+ separate debug file.
+
+ * relocate.c (__libdwfl_relocate): Don't return DWFL_E_NO_DWARF.
+
2007-10-09 Roland McGrath <roland@redhat.com>
* dwfl_report_elf.c (__libdwfl_report_elf): Clear SHDR->sh_offset when
============================================================
--- libdwfl/dwfl_module_build_id.c ae14fc9f3be468ffff14b4f6247ad38898705132
+++ libdwfl/dwfl_module_build_id.c c67b9be68b69c98f6fd1024f521acdab0678ea02
@@ -73,6 +73,8 @@ found_build_id (Dwfl_Module *mod, bool s
return len;
}
+#define NO_VADDR ((GElf_Addr) -1l)
+
static int
check_notes (Dwfl_Module *mod, bool set, Elf_Data *data, GElf_Addr data_vaddr)
{
@@ -86,7 +88,7 @@ check_notes (Dwfl_Module *mod, bool set,
"GNU", sizeof "GNU"))
return found_build_id (mod, set,
data->d_buf + desc_pos, nhdr.n_descsz,
- data_vaddr == 0 ? 0 : data_vaddr + pos);
+ data_vaddr == NO_VADDR ? 0 : data_vaddr + pos);
return 0;
}
@@ -129,7 +131,7 @@ __libdwfl_find_build_id (Dwfl_Module *mo
if (likely (shdr != NULL) && shdr->sh_type == SHT_NOTE)
result = check_notes (mod, set, elf_getdata (scn, NULL),
(shdr->sh_flags & SHF_ALLOC)
- ? shdr->sh_addr : 0);
+ ? shdr->sh_addr + mod->main.bias : NO_VADDR);
}
while (result == 0 && (scn = elf_nextscn (elf, scn)) != NULL);
============================================================
--- libdwfl/dwfl_module_getsym.c 5596a4a3df363bb27759a0c26519b9818475aa80
+++ libdwfl/dwfl_module_getsym.c c1a0448eecebc039393fb884ff7d0684d1d5001f
@@ -85,10 +85,7 @@ dwfl_module_getsym (Dwfl_Module *mod, in
break;
default:
- if (mod->e_type != ET_REL)
- /* Apply the bias to the symbol value. */
- sym->st_value += mod->symfile->bias;
- else
+ if (mod->e_type == ET_REL)
{
/* In an ET_REL file, the symbol table values are relative
to the section, not to the module's load base. */
@@ -102,6 +99,8 @@ dwfl_module_getsym (Dwfl_Module *mod, in
return NULL;
}
}
+ /* Apply the bias to the symbol value. */
+ sym->st_value += mod->symfile->bias;
break;
}
============================================================
--- libdwfl/dwfl_report_elf.c d9db919b103fc3411d240f3a096af5e57a3adce6
+++ libdwfl/dwfl_report_elf.c ee4a17cd0e3bf27c306b484ab38c34a7de2b7c0e
@@ -51,6 +51,14 @@
#include <fcntl.h>
#include <unistd.h>
+
+/* We start every ET_REL module at a moderately aligned boundary.
+ This keeps the low addresses easy to read compared to a layout
+ starting at 0 (as when using -e). It also makes it unlikely
+ that a middle section will have a larger alignment and require
+ rejiggering (see below). */
+#define REL_MIN_ALIGN ((GElf_Xword) 0x100)
+
Dwfl_Module *
internal_function
__libdwfl_report_elf (Dwfl *dwfl, const char *name, const char *file_name,
@@ -72,41 +80,91 @@ __libdwfl_report_elf (Dwfl *dwfl, const
By updating the section header in place, we leave the layout
information to be found by relocation. */
- start = end = base;
+ start = end = base = (base + REL_MIN_ALIGN - 1) & -REL_MIN_ALIGN;
+ bool first = true;
Elf_Scn *scn = NULL;
while ((scn = elf_nextscn (elf, scn)) != NULL)
{
GElf_Shdr shdr_mem;
GElf_Shdr *shdr = gelf_getshdr (scn, &shdr_mem);
- if (shdr == NULL)
+ if (unlikely (shdr == NULL))
goto elf_error;
if (shdr->sh_flags & SHF_ALLOC)
{
const GElf_Xword align = shdr->sh_addralign ?: 1;
- if (shdr->sh_addr == 0 || (bias == 0 && end > start))
+ const GElf_Addr next = (end + align - 1) & -align;
+ if (shdr->sh_addr == 0
+ /* Once we've started doing layout we have to do it all,
+ unless we just layed out the first section at 0 when
+ it already was at 0. */
+ || (bias == 0 && end > start && end != next))
{
- shdr->sh_addr = (end + align - 1) & -align;
+ shdr->sh_addr = next;
if (end == base)
/* This is the first section assigned a location.
Use its aligned address as the module's base. */
- start = shdr->sh_addr;
+ start = base = shdr->sh_addr;
+ else if (unlikely (base & (align - 1)))
+ {
+ /* If BASE has less than the maximum alignment of
+ any section, we eat more than the optimal amount
+ of padding and so make the module's apparent
+ size come out larger than it would when placed
+ at zero. So reset the layout with a better base. */
+
+ start = end = base = (base + align - 1) & -align;
+ Elf_Scn *prev_scn = NULL;
+ do
+ {
+ prev_scn = elf_nextscn (elf, prev_scn);
+ GElf_Shdr prev_shdr_mem;
+ GElf_Shdr *prev_shdr = gelf_getshdr (prev_scn,
+ &prev_shdr_mem);
+ if (unlikely (prev_shdr == NULL))
+ goto elf_error;
+ if (prev_shdr->sh_flags & SHF_ALLOC)
+ {
+ const GElf_Xword prev_align
+ = prev_shdr->sh_addralign ?: 1;
+
+ prev_shdr->sh_addr
+ = (end + prev_align - 1) & -prev_align;
+ end = prev_shdr->sh_addr + prev_shdr->sh_size;
+
+ if (unlikely (! gelf_update_shdr (prev_scn,
+ prev_shdr)))
+ goto elf_error;
+ }
+ }
+ while (prev_scn != scn);
+ continue;
+ }
+
end = shdr->sh_addr + shdr->sh_size;
- if (shdr->sh_addr == 0)
- /* This is a marker that this was resolved to zero,
- to prevent a callback. */
- shdr->sh_offset = 0;
- if (! gelf_update_shdr (scn, shdr))
+ if (likely (shdr->sh_addr != 0)
+ && unlikely (! gelf_update_shdr (scn, shdr)))
goto elf_error;
}
else
{
- if (bias == 0 || end < shdr->sh_addr + shdr->sh_size)
+ /* The address is already assigned. Just track it. */
+ if (first || end < shdr->sh_addr + shdr->sh_size)
end = shdr->sh_addr + shdr->sh_size;
- if (bias == 0 || bias > shdr->sh_addr)
+ if (first || bias > shdr->sh_addr)
+ /* This is the lowest address in the module. */
bias = shdr->sh_addr;
+
+ if ((shdr->sh_addr - bias + base) & (align - 1))
+ /* This section winds up misaligned using BASE.
+ Adjust BASE upwards to make it congruent to
+ the lowest section address in the file modulo ALIGN. */
+ base = (((base + align - 1) & -align)
+ + (bias & (align - 1)));
}
+
+ first = false;
}
}
@@ -117,7 +175,7 @@ __libdwfl_report_elf (Dwfl *dwfl, const
Now just compute the bias from the requested base. */
start = base;
end = end - bias + start;
- bias -= start;
+ bias = start - bias;
}
break;
@@ -133,7 +191,7 @@ __libdwfl_report_elf (Dwfl *dwfl, const
for (uint_fast16_t i = 0; i < ehdr->e_phnum; ++i)
{
GElf_Phdr phdr_mem, *ph = gelf_getphdr (elf, i, &phdr_mem);
- if (ph == NULL)
+ if (unlikely (ph == NULL))
goto elf_error;
if (ph->p_type == PT_LOAD)
{
@@ -148,7 +206,7 @@ __libdwfl_report_elf (Dwfl *dwfl, const
for (uint_fast16_t i = ehdr->e_phnum; i-- > 0;)
{
GElf_Phdr phdr_mem, *ph = gelf_getphdr (elf, i, &phdr_mem);
- if (ph == NULL)
+ if (unlikely (ph == NULL))
goto elf_error;
if (ph->p_type == PT_LOAD)
{
============================================================
--- libdwfl/offline.c 1508fb5c96e46f5bf3bbdaa0e18921243cf2ab8b
+++ libdwfl/offline.c d8dc43d35ecff3200099ec421a93cfadbd5a2e17
@@ -53,8 +53,9 @@
/* Since dwfl_report_elf lays out the sections already, this will only be
called when the section headers of the debuginfo file are being
- consulted instead. With binutils strip-to-debug, the symbol table is in
- the debuginfo file and relocation looks there. */
+ consulted instead, or for the section placed at 0. With binutils
+ strip-to-debug, the symbol table is in the debuginfo file and relocation
+ looks there. */
int
dwfl_offline_section_address (Dwfl_Module *mod,
void **userdata __attribute__ ((unused)),
@@ -69,6 +70,11 @@ dwfl_offline_section_address (Dwfl_Modul
assert (shdr->sh_addr == 0);
assert (shdr->sh_flags & SHF_ALLOC);
+ if (mod->debug.elf == NULL)
+ /* We are only here because sh_addr is zero even though layout is complete.
+ The first section in the first file under -e is placed at 0. */
+ return 0;
+
/* The section numbers might not match between the two files.
The best we can rely on is the order of SHF_ALLOC sections. */
============================================================
--- libdwfl/relocate.c 5a08921fcd4b957b0d768e7a140eb5187dcaf69e
+++ libdwfl/relocate.c 51258c3bf6a18602dbd3fd2d8b721d4f7a9aef60
@@ -64,9 +64,7 @@ __libdwfl_relocate_value (Dwfl_Module *m
if (refshdr == NULL)
return DWFL_E_LIBELF;
- if (refshdr->sh_addr == 0
- && (refshdr->sh_flags & SHF_ALLOC)
- && refshdr->sh_offset != 0)
+ if (refshdr->sh_addr == 0 && (refshdr->sh_flags & SHF_ALLOC))
{
/* This is a loaded section. Find its actual
address and update the section header. */
@@ -89,13 +87,11 @@ __libdwfl_relocate_value (Dwfl_Module *m
don't really care. */
refshdr->sh_addr = 0; /* Make no adjustment below. */
- /* Mark it so we don't check it again for the next relocation. */
- refshdr->sh_offset = 0;
-
/* Update the in-core file's section header to show the final
load address (or unloadedness). This serves as a cache,
so we won't get here again for the same section. */
- if (unlikely (! gelf_update_shdr (refscn, refshdr)))
+ if (likely (refshdr->sh_addr != 0)
+ && unlikely (! gelf_update_shdr (refscn, refshdr)))
return DWFL_E_LIBELF;
}
@@ -202,7 +198,7 @@ __libdwfl_relocate (Dwfl_Module *mod, El
/* Look at each section in the debuginfo file, and process the
relocation sections for debugging sections. */
- Dwfl_Error result = DWFL_E_NO_DWARF;
+ Dwfl_Error result = DWFL_E_NOERROR;
Elf_Scn *scn = NULL;
while ((scn = elf_nextscn (debugfile, scn)) != NULL)
{
@@ -369,7 +365,6 @@ __libdwfl_relocate (Dwfl_Module *mod, El
if (reldata == NULL)
return DWFL_E_LIBELF;
- result = DWFL_E_NOERROR;
size_t nrels = shdr->sh_size / shdr->sh_entsize;
if (shdr->sh_type == SHT_REL)
for (size_t relidx = 0; !result && relidx < nrels; ++relidx)
============================================================
--- src/ChangeLog 18c1d13eb93bea8ea545811e1513cfa8fa207fa5
+++ src/ChangeLog 026cfbde5f235e169ca1aa4c5be156090254d137
@@ -1,3 +1,7 @@
+2007-10-16 Roland McGrath <roland@redhat.com>
+
+ * readelf.c (hex_dump): Fix rounding error in whitespace calculation.
+
2007-10-15 Roland McGrath <roland@redhat.com>
* make-debug-archive.in: New file.
============================================================
--- src/readelf.c a0d9bd8c3fb36429895ee314dd3a874af3f8866e
+++ src/readelf.c 06970982eff8d85287725619dd9eefc51c1bf1c0
@@ -5888,7 +5888,7 @@ hex_dump (const uint8_t *data, size_t le
printf ("%02x", data[pos + i]);
if (chunk < 16)
- printf ("%*s", (int) ((16 - chunk) * 2 + (16 - chunk) / 4), "");
+ printf ("%*s", (int) ((16 - chunk) * 2 + (16 - chunk + 3) / 4), "");
for (size_t i = 0; i < chunk; ++i)
{
============================================================
--- tests/ChangeLog 567abc0255271ddf2937bd3ebc5eebd8e0417d12
+++ tests/ChangeLog 90ef947259192962a6242fab915f10059bef1b0c
@@ -1,3 +1,7 @@
+2007-10-16 Roland McGrath <roland@redhat.com>
+
+ * test-subr.sh (remove_files): Don't pass -Bb to diff.
+
2007-10-09 Roland McGrath <roland@redhat.com>
* dwflmodtest.c (print_module): Don't use %p in output.
============================================================
--- tests/test-subr.sh 5ba4008367c39437a8e8d6ed0b6757d54bc10f4d
+++ tests/test-subr.sh ea1d0339bca3d875076ed15e114e9d47b2ea96e2
@@ -1,5 +1,5 @@
#! /bin/sh
-# Copyright (C) 2005 Red Hat, Inc.
+# Copyright (C) 2005, 2007 Red Hat, Inc.
# This file is part of Red Hat elfutils.
#
# Red Hat elfutils is free software; you can redistribute it and/or modify
@@ -58,7 +58,7 @@ testrun_compare()
{
outfile="${1##*/}.out"
testrun_out $outfile "$@"
- diff -Bbu $outfile -
+ diff -u $outfile -
# diff's exit status will kill the script.
}

10
elfutils.spec
View File

@ -1,5 +1,5 @@
%define eu_version 0.130
%define eu_release 1
%define eu_release 2
%if %{?_with_compat:1}%{!?_with_compat:0}
%define compat 1
@ -35,6 +35,8 @@ Patch0: elfutils-strip-copy-symtab.patch
Source2: testfile16.symtab.bz2
Source3: testfile16.symtab.debug.bz2
Patch3: elfutils-0.130-fixes.patch
BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
BuildRequires: bison >= 1.875
@ -154,6 +156,8 @@ find . \( -name configure -o -name config.h.in \) -print | xargs touch
%patch2 -p1
%patch3 -p0
%build
# Remove -Wall from default flags. The makefiles enable enough warnings
# themselves, and they use -Werror. Appending -Wall defeats the cases where
@ -261,6 +265,10 @@ rm -rf ${RPM_BUILD_ROOT}
%{_libdir}/libelf.a
%changelog
* Wed Oct 17 2007 Roland McGrath <roland@redhat.com> - 0.130-2
- Fix ET_REL support.
- Fix odd indentation in eu-readelf -x output.
* Tue Oct 16 2007 Roland McGrath <roland@redhat.com> - 0.130-1
- Update to 0.130
- eu-readelf -p option can take an argument like -x for one section