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alignment fixes, segment table botch fix

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This commit is contained in:
roland 2008-08-28 07:38:37 +00:00
parent d3f439115a
commit b6004ce711
2 changed files with 124 additions and 3 deletions
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118
elfutils-0.137-fixes.patch Normal file
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@ -0,0 +1,118 @@
--- elfutils-0.137/libdwfl/ChangeLog
+++ elfutils-0.137/libdwfl/ChangeLog
@@ -1,3 +1,12 @@
+2008-08-28 Roland McGrath <roland@redhat.com>
+
+ * segment.c (reify_segments): Fix last change.
+
+2008-08-27 Roland McGrath <roland@redhat.com>
+
+ * linux-proc-maps.c (read_proc_memory): Return 0 for EINVAL or EPERM
+ failure from pread64.
+
2008-08-26 Roland McGrath <roland@redhat.com>
* segment.c (reify_segments): Insert a trailing segment for a module
--- elfutils-0.137/libdwfl/linux-proc-maps.c
+++ elfutils-0.137/libdwfl/linux-proc-maps.c
@@ -267,6 +267,9 @@ read_proc_memory (void *arg, void *data,
{
const int fd = *(const int *) arg;
ssize_t nread = pread64 (fd, data, maxread, (off64_t) address);
+ /* Some kernels don't actually let us do this read, ignore those errors. */
+ if (nread < 0 && (errno == EINVAL || errno == EPERM))
+ return 0;
if (nread > 0 && (size_t) nread < minread)
nread = 0;
return nread;
--- elfutils-0.137/libdwfl/segment.c
+++ elfutils-0.137/libdwfl/segment.c
@@ -175,9 +175,17 @@ reify_segments (Dwfl *dwfl)
return true;
++idx;
}
+ else if (dwfl->lookup_addr[idx] < start)
+ {
+ /* The module starts past the end of this segment.
+ Add a new one. */
+ if (unlikely (insert (dwfl, idx + 1, start, end, -1)))
+ return true;
+ ++idx;
+ }
- if (((size_t) idx + 1 == dwfl->lookup_elts
- || end < dwfl->lookup_addr[idx + 1])
+ if ((size_t) idx + 1 < dwfl->lookup_elts
+ && end < dwfl->lookup_addr[idx + 1]
/* The module ends in the middle of this segment. Split it. */
&& unlikely (insert (dwfl, idx + 1,
end, dwfl->lookup_addr[idx + 1], -1)))
--- elfutils-0.137/libelf/ChangeLog
+++ elfutils-0.137/libelf/ChangeLog
@@ -1,3 +1,9 @@
+2008-08-27 Roland McGrath <roland@redhat.com>
+
+ * elf_begin.c (get_shnum): Avoid misaligned reads for matching endian.
+
+ * libelfP.h [!ALLOW_UNALIGNED] (__libelf_type_align): Fix CLASS index.
+
2008-08-25 Roland McGrath <roland@redhat.com>
* Makefile.am (libelf_so_LDLIBS): New variable.
--- elfutils-0.137/libelf/elf_begin.c
+++ elfutils-0.137/libelf/elf_begin.c
@@ -110,8 +110,14 @@ get_shnum (void *map_address, unsigned c
} ehdr_mem;
bool is32 = e_ident[EI_CLASS] == ELFCLASS32;
+ // e_shnum shoff
+
/* Make the ELF header available. */
- if (e_ident[EI_DATA] == MY_ELFDATA)
+ if (e_ident[EI_DATA] == MY_ELFDATA
+ && (ALLOW_UNALIGNED
+ || (((size_t) e_ident
+ & ((is32 ? __alignof__ (Elf32_Ehdr) : __alignof__ (Elf64_Ehdr))
+ - 1)) == 0)))
ehdr.p = e_ident;
else
{
@@ -130,8 +136,11 @@ get_shnum (void *map_address, unsigned c
else
memcpy (&ehdr_mem, e_ident, sizeof (Elf32_Ehdr));
- CONVERT (ehdr_mem.e32.e_shnum);
- CONVERT (ehdr_mem.e32.e_shoff);
+ if (e_ident[EI_DATA] != MY_ELFDATA)
+ {
+ CONVERT (ehdr_mem.e32.e_shnum);
+ CONVERT (ehdr_mem.e32.e_shoff);
+ }
}
else
{
@@ -143,8 +152,11 @@ get_shnum (void *map_address, unsigned c
else
memcpy (&ehdr_mem, e_ident, sizeof (Elf64_Ehdr));
- CONVERT (ehdr_mem.e64.e_shnum);
- CONVERT (ehdr_mem.e64.e_shoff);
+ if (e_ident[EI_DATA] != MY_ELFDATA)
+ {
+ CONVERT (ehdr_mem.e64.e_shnum);
+ CONVERT (ehdr_mem.e64.e_shoff);
+ }
}
}
--- elfutils-0.137/libelf/libelfP.h
+++ elfutils-0.137/libelf/libelfP.h
@@ -460,7 +460,7 @@ extern const uint_fast8_t __libelf_type_
version, binary class, and type. */
extern const uint_fast8_t __libelf_type_aligns[EV_NUM - 1][ELFCLASSNUM - 1][ELF_T_NUM] attribute_hidden;
# define __libelf_type_align(class, type) \
- (__libelf_type_aligns[LIBELF_EV_IDX][class][type] ?: 1)
+ (__libelf_type_aligns[LIBELF_EV_IDX][class - 1][type] ?: 1)
#else
# define __libelf_type_align(class, type) 1
#endif

9
elfutils.spec
View File

@ -1,5 +1,5 @@
%define eu_version 0.137
%define eu_release 1
%define eu_release 2
%if %{?_with_compat:1}%{!?_with_compat:0}
%define compat 1
@ -35,6 +35,7 @@ URL: https://fedorahosted.org/elfutils/
Source: http://fedorahosted.org/releases/e/l/elfutils/%{name}-%{version}.tar.gz
Patch1: elfutils-portability.patch
Patch2: elfutils-robustify.patch
Patch3: elfutils-0.137-fixes.patch
Requires: elfutils-libelf-%{_arch} = %{version}-%{release}
Requires: elfutils-libs-%{_arch} = %{version}-%{release}
@ -156,6 +157,8 @@ find . \( -name configure -o -name config.h.in \) -print | xargs touch
%patch2 -p1 -b .robustify
%patch3 -p1 -b .fixes
find . -name \*.sh ! -perm -0100 -print | xargs chmod +x
%build
@ -262,10 +265,11 @@ rm -rf ${RPM_BUILD_ROOT}
%{_libdir}/libelf.a
%changelog
* Wed Aug 27 2008 Roland McGrath <roland@redhat.com> - 0.137-1
* Thu Aug 28 2008 Roland McGrath <roland@redhat.com> - 0.137-2
- Update to 0.137
- libdwfl: bug fixes; new segment interfaces;
all the libdwfl-based tools now support --core=COREFILE option
- Resolves: RHBZ #325021, RHBZ #447416
* Mon Jul 7 2008 Tom "spot" Callaway <tcallawa@redhat.com> - 0.135-2
- fix conditional comparison
@ -354,7 +358,6 @@ rm -rf ${RPM_BUILD_ROOT}
- New program eu-ar.
- libdw: fix missing dwarf_getelf (#227206)
- libdwfl: dwfl_module_addrname for st_size=0 symbols (#227167, #227231)
- Resolves: RHBZ #227206, RHBZ #227167, RHBZ #227231
* Wed Jan 10 2007 Roland McGrath <roland@redhat.com> - 0.125-3
- Fix overeager warn_unused_result build failures.