0.195-1
- Upgrade to upstream elfutils 0.195 - Drop upstreamed patches elfutils-0.194-zero-sh_addr.patch elfutils-0.194-alloc-jobs.patch Resolves: RHEL-169429
This commit is contained in:
Aaron Merey
parent
1a01e91e5f
commit
d39e3c4245
1
.gitignore
vendored
1
.gitignore
vendored
@ -35,3 +35,4 @@
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/elfutils-0.192.tar.bz2
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/elfutils-0.193.tar.bz2
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/elfutils-0.194.tar.bz2
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/elfutils-0.195.tar.bz2
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@ -1,135 +0,0 @@
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From f66135f16fe44182a3fc5b651d7e5071c936217d Mon Sep 17 00:00:00 2001
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From: Aaron Merey <amerey@redhat.com>
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Date: Mon, 27 Oct 2025 22:00:12 -0400
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Subject: [PATCH] readelf: Allocate job_data one-by-one as needed
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Currently, job_data is stored in an array whose size is equal to the
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number of debug sections (.debug_*, .eh_frame, .gdb_index, etc.).
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This size may be too small if a binary contains multiple debug sections
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with the same name. For example an ET_REL binary compiled with -ggdb3
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can contain multiple .debug_macro sections.
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Fix this by allocating job_data on the fly when preparing to read a
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debug section. This supports an arbitrary number of debug sections
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while also avoiding unnecessary memory allocation.
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https://sourceware.org/bugzilla/show_bug.cgi?id=33580
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Signed-off-by: Aaron Merey <amerey@redhat.com>
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---
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src/readelf.c | 49 +++++++++++++++++++++++++------------------------
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1 file changed, 25 insertions(+), 24 deletions(-)
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diff --git a/src/readelf.c b/src/readelf.c
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index ee6c203d..a2d17358 100644
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--- a/src/readelf.c
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+++ b/src/readelf.c
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@@ -12200,7 +12200,8 @@ getone_dwflmod (Dwfl_Module *dwflmod,
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return DWARF_CB_OK;
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}
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-typedef struct {
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+typedef struct Job_Data {
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+ struct Job_Data *next;
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Dwfl_Module *dwflmod;
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Ebl *ebl;
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GElf_Ehdr *ehdr;
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@@ -12230,7 +12231,7 @@ do_job (void *data, FILE *out)
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If thread safety is not supported or the maximum number of threads is set
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to 1, then immediately call START_ROUTINE with the given arguments. */
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static void
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-schedule_job (job_data jdata[], size_t idx,
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+schedule_job (job_data **jdatalist,
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void (*start_routine) (Dwfl_Module *, Ebl *, GElf_Ehdr *,
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Elf_Scn *, GElf_Shdr *, Dwarf *, FILE *),
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Dwfl_Module *dwflmod, Ebl *ebl, GElf_Ehdr *ehdr, Elf_Scn *scn,
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@@ -12239,21 +12240,24 @@ schedule_job (job_data jdata[], size_t idx,
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#ifdef USE_LOCKS
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if (max_threads > 1)
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{
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- /* Add to the job queue. */
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- jdata[idx].dwflmod = dwflmod;
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- jdata[idx].ebl = ebl;
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- jdata[idx].ehdr = ehdr;
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- jdata[idx].scn = *scn;
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- jdata[idx].shdr = *shdr;
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- jdata[idx].dbg = dbg;
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- jdata[idx].fp = start_routine;
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+ job_data *jdata = xmalloc (sizeof (job_data));
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+
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+ jdata->dwflmod = dwflmod;
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+ jdata->ebl = ebl;
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+ jdata->ehdr = ehdr;
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+ jdata->scn = *scn;
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+ jdata->shdr = *shdr;
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+ jdata->dbg = dbg;
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+ jdata->fp = start_routine;
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+ jdata->next = *jdatalist;
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+ *jdatalist = jdata;
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- add_job (do_job, (void *) &jdata[idx]);
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+ add_job (do_job, (void *) jdata);
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}
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else
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start_routine (dwflmod, ebl, ehdr, scn, shdr, dbg, stdout);
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#else
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- (void) jdata; (void) idx;
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+ (void) jdatalist;
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start_routine (dwflmod, ebl, ehdr, scn, shdr, dbg, stdout);
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#endif
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@@ -12431,8 +12435,7 @@ print_debug (Dwfl_Module *dwflmod, Ebl *ebl, GElf_Ehdr *ehdr)
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if (unlikely (elf_getshdrstrndx (ebl->elf, &shstrndx) < 0))
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error_exit (0, _("cannot get section header string table index"));
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- ssize_t num_jobs = 0;
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- job_data *jdata = NULL;
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+ job_data *jdatalist = NULL;
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/* If the .debug_info section is listed as implicitly required then
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we must make sure to handle it before handling any other debug
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@@ -12531,13 +12534,6 @@ print_debug (Dwfl_Module *dwflmod, Ebl *ebl, GElf_Ehdr *ehdr)
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if (name == NULL)
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continue;
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- if (jdata == NULL)
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- {
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- jdata = calloc (ndebug_sections, sizeof (*jdata));
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- if (jdata == NULL)
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- error_exit (0, _("failed to allocate job data"));
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- }
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-
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int n;
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for (n = 0; n < ndebug_sections; ++n)
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{
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@@ -12561,10 +12557,9 @@ print_debug (Dwfl_Module *dwflmod, Ebl *ebl, GElf_Ehdr *ehdr)
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{
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if (((print_debug_sections | implicit_debug_sections)
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& debug_sections[n].bitmask))
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- schedule_job (jdata, num_jobs++, debug_sections[n].fp,
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+ schedule_job (&jdatalist, debug_sections[n].fp,
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dwflmod, ebl, ehdr, scn, shdr, dbg);
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- assert (num_jobs <= ndebug_sections);
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break;
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}
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}
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@@ -12579,7 +12574,13 @@ print_debug (Dwfl_Module *dwflmod, Ebl *ebl, GElf_Ehdr *ehdr)
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dwfl_end (skel_dwfl);
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free (skel_name);
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- free (jdata);
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+
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+ while (jdatalist != NULL)
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+ {
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+ job_data *jdata = jdatalist;
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+ jdatalist = jdatalist->next;
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+ free (jdata);
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+ }
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/* Turn implicit and/or explicit back on in case we go over another file. */
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if (implicit_info)
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--
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2.51.0
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@ -1,263 +0,0 @@
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To: elfutils-devel@sourceware.org
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Cc: Mark Wielaard <mark@klomp.org>
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Subject: [PATCH] libdwfl: Work around ET_REL files with sh_addr fields set to
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non-zero
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Date: Tue, 3 Mar 2026 13:16:07 +0100
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Errors-To: elfutils-devel-bounces~patchwork=sourceware.org@sourceware.org
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libdwfl tries to model the loading of modules (executables, shared
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libraries, the linux kernel and/or kernel modules) in
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memory. Depending on the (offline) load address it then also applies
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(simple) relocations for ET_REL (object files or kernel modules). Load
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addresses are normally represented through phdr segments for ET_EXEC
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or ET_DYN, but for ET_REL files (which don't have phdrs) the Elf
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section sh_addr fields are used.
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The sh_addr fields of the ET_REL Elf images are updated in two places
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__libdwfl_elf_address_range (through __libdwfl_report_elf) and
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__libdwfl_relocate (through dwfl_module_getelf and
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dwfl_module_getdwarf). Both rely on sh_addr being zero if no load
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address has been set yet, so the address layout for each (SHF_ALLOC)
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section is done only once.
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Recent linux kernels use a linker script that does set the sh_addr
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fields to (random, linker assigned) non-zero addresses. See commit
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1ba9f8979426 ("vmlinux.lds: Unify TEXT_MAIN, DATA_MAIN, and related
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macros").
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The sh_addr values seems unnecessary, but because they aren't zero
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anymore our layout/relocation code doesn't know it still has to figure
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out a "real" load value for these sections.
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Introduce __libdwfl_reset_sh_addr which resets all sh_addr fields to
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zero for SHF_ALLOC sections in ET_REL files.
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We don't call __libdwfl_reset_sh_addr on aux_sym files (from
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.gnu_debugdata) and when constructing an Elf from a core file. In all
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other cases we know (or assume) that the Elf file is being opened
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through libdw_open_elf (called indirectly through __libdw_open_elf,
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__libdwfl_report_offline, dwfl_module_getelf and dwfl_module_getdwarf)
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This technically changes the Elf that goes through libdwfl, but we
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would already update the sh_addr fields for ET_REL Elf sections in
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memory anyway to represent the load address as libdwfl would see
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them. So this isn't really a change in behavior (it just might update
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the sh_addr field twice).
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* libdwfl/libdwflP.h (__libdwfl_reset_sh_addr): Define new
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internal function.
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* libdwfl/relocate.c (__libdwfl_reset_sh_addr): New internal
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function.
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* libdwfl/open.c (libdw_open_elf): Call __libdwfl_reset_sh_addr.
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* libdwfl/dwfl_module_getdwarf.c (open_elf_file): Add comment.
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(find_aux_sym): Likewise.
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(find_dw): Likewise.
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* libdwfl/dwfl_segment_report_module.c
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(dwfl_segment_report_module): Likewise.
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* libdwfl/dwfl_report_elf.c (__libdwfl_report_elf): Likewise.
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Signed-off-by: Mark Wielaard <mark@klomp.org>
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---
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libdwfl/dwfl_module_getdwarf.c | 3 +++
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libdwfl/dwfl_report_elf.c | 3 +++
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libdwfl/dwfl_segment_report_module.c | 2 ++
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libdwfl/libdwflP.h | 4 ++++
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libdwfl/open.c | 2 ++
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libdwfl/relocate.c | 32 ++++++++++++++++++++++++++++
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6 files changed, 46 insertions(+)
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diff --git a/libdwfl/dwfl_module_getdwarf.c b/libdwfl/dwfl_module_getdwarf.c
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index 135132d69178..430c32367d01 100644
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--- a/libdwfl/dwfl_module_getdwarf.c
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+++ b/libdwfl/dwfl_module_getdwarf.c
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@@ -57,6 +57,7 @@ open_elf_file (Elf **elf, int *fd, char **name)
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if (*fd < 0)
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return CBFAIL;
|
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+ /* This will call __libdwfl_reset_sh_addr. */
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return __libdw_open_file (fd, elf, true, false);
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}
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else if (unlikely (elf_kind (*elf) != ELF_K_ELF))
|
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@@ -1004,6 +1005,7 @@ find_aux_sym (Dwfl_Module *mod __attribute__ ((unused)),
|
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free (buffer);
|
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else
|
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{
|
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+ /* We don't call __libdwfl_reset_sh_addr here, should we? */
|
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mod->aux_sym.elf = elf_memory (buffer, size);
|
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if (mod->aux_sym.elf == NULL)
|
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free (buffer);
|
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@@ -1423,6 +1425,7 @@ find_dw (Dwfl_Module *mod)
|
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switch (mod->dwerr)
|
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{
|
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case DWFL_E_NOERROR:
|
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+ /* main.elf already should have had __libdwfl_reset_sh_addr called. */
|
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mod->debug.elf = mod->main.elf;
|
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mod->debug.address_sync = mod->main.address_sync;
|
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|
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diff --git a/libdwfl/dwfl_report_elf.c b/libdwfl/dwfl_report_elf.c
|
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index a76d36816c6f..7173375127a8 100644
|
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--- a/libdwfl/dwfl_report_elf.c
|
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+++ b/libdwfl/dwfl_report_elf.c
|
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@@ -268,6 +268,9 @@ __libdwfl_report_elf (Dwfl *dwfl, const char *name, const char *file_name,
|
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/* Preinstall the open ELF handle for the module. */
|
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if (m->main.elf == NULL)
|
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{
|
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+ /* We assume all calls to __libdwfl_report_elf got their Elf
|
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+ through __libdw_open_file which already called
|
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+ __libdwfl_reset_sh_addr. */
|
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m->main.elf = elf;
|
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m->main.vaddr = vaddr;
|
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m->main.address_sync = address_sync;
|
||||
diff --git a/libdwfl/dwfl_segment_report_module.c b/libdwfl/dwfl_segment_report_module.c
|
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index f2f866c2c70f..5ad318c78b09 100644
|
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--- a/libdwfl/dwfl_segment_report_module.c
|
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+++ b/libdwfl/dwfl_segment_report_module.c
|
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@@ -1072,6 +1072,8 @@ dwfl_segment_report_module (Dwfl *dwfl, int ndx, const char *name,
|
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elf->flags |= ELF_F_MALLOCED;
|
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}
|
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|
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+ /* Elf comes through a core file, so cannot be an ET_REL. Don't call
|
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+ __libdwfl_reset_sh_addr. */
|
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if (elf != NULL && mod->main.elf == NULL)
|
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{
|
||||
/* Install the file in the module. */
|
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diff --git a/libdwfl/libdwflP.h b/libdwfl/libdwflP.h
|
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index 6e394c262010..7a181029c529 100644
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--- a/libdwfl/libdwflP.h
|
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+++ b/libdwfl/libdwflP.h
|
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@@ -482,6 +482,10 @@ extern void __libdwfl_module_free (Dwfl_Module *mod) internal_function;
|
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/* Find the main ELF file, update MOD->elferr and/or MOD->main.elf. */
|
||||
extern void __libdwfl_getelf (Dwfl_Module *mod) internal_function;
|
||||
|
||||
+/* Reset all sh_addr fields to zero for SHF_ALLOC sections if the Elf
|
||||
+ handle is an ET_REL. Called from libdw_open_elf. */
|
||||
+extern void __libdwfl_reset_sh_addr (Elf *elf) internal_function;
|
||||
+
|
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/* Process relocations in debugging sections in an ET_REL file.
|
||||
FILE must be opened with ELF_C_READ_MMAP_PRIVATE or ELF_C_READ,
|
||||
to make it possible to relocate the data in place (or ELF_C_RDWR or
|
||||
diff --git a/libdwfl/open.c b/libdwfl/open.c
|
||||
index e66595fba097..86a3540f2af3 100644
|
||||
--- a/libdwfl/open.c
|
||||
+++ b/libdwfl/open.c
|
||||
@@ -190,6 +190,8 @@ libdw_open_elf (int *fdp, Elf **elfp, bool close_on_fail, bool archive_ok,
|
||||
*fdp = -1;
|
||||
}
|
||||
|
||||
+ __libdwfl_reset_sh_addr (elf);
|
||||
+
|
||||
*elfp = elf;
|
||||
return error;
|
||||
}
|
||||
diff --git a/libdwfl/relocate.c b/libdwfl/relocate.c
|
||||
index 0497bd4fe1f3..dc9f45e64f3f 100644
|
||||
--- a/libdwfl/relocate.c
|
||||
+++ b/libdwfl/relocate.c
|
||||
@@ -1,5 +1,6 @@
|
||||
/* Relocate debug information.
|
||||
Copyright (C) 2005-2011, 2014, 2016, 2018 Red Hat, Inc.
|
||||
+ Copyright (C) 2026 Mark J. Wielaard <mark@klomp.org>
|
||||
This file is part of elfutils.
|
||||
|
||||
This file is free software; you can redistribute it and/or modify
|
||||
@@ -37,6 +38,37 @@
|
||||
|
||||
typedef uint8_t GElf_Byte;
|
||||
|
||||
+/* Reset all sh_addr fields to zero for SHF_ALLOC sections if the Elf
|
||||
+ handle is an ET_REL. Called from libdw_open_elf. */
|
||||
+
|
||||
+void
|
||||
+internal_function
|
||||
+__libdwfl_reset_sh_addr (Elf *elf)
|
||||
+{
|
||||
+ if (elf == NULL || elf->kind != ELF_K_ELF)
|
||||
+ return;
|
||||
+
|
||||
+ GElf_Ehdr ehdr_mem;
|
||||
+ GElf_Ehdr *ehdr = gelf_getehdr (elf, &ehdr_mem);
|
||||
+ if (ehdr == NULL || ehdr->e_type != ET_REL)
|
||||
+ return;
|
||||
+
|
||||
+ 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 ((shdr->sh_flags & SHF_ALLOC) != 0 && shdr->sh_addr != 0)
|
||||
+ {
|
||||
+ shdr_mem.sh_addr = 0;
|
||||
+ gelf_update_shdr (scn, &shdr_mem);
|
||||
+ }
|
||||
+ }
|
||||
+ }
|
||||
+}
|
||||
+
|
||||
/* Adjust *VALUE to add the load address of the SHNDX section.
|
||||
We update the section header in place to cache the result. */
|
||||
|
||||
@ -3,8 +3,8 @@
|
||||
%bcond_with static
|
||||
|
||||
Name: elfutils
|
||||
Version: 0.194
|
||||
%global baserelease 2
|
||||
Version: 0.195
|
||||
%global baserelease 1
|
||||
Release: %{baserelease}%{?dist}
|
||||
URL: http://elfutils.org/
|
||||
%global source_url ftp://sourceware.org/pub/elfutils/%{version}/
|
||||
@ -17,7 +17,7 @@ Summary: A collection of utilities and DSOs to handle ELF files and DWARF data
|
||||
%global depsuffix %{?_isa}%{!?_isa:-%{_arch}}
|
||||
|
||||
# eu-stacktrace currently only supports x86_64
|
||||
%ifarch x86_64
|
||||
%ifarch x86_64 aarch64
|
||||
%global enable_stacktrace 1
|
||||
%else
|
||||
%global enable_stacktrace 0
|
||||
@ -96,12 +96,6 @@ BuildRequires: gettext-devel
|
||||
# For s390x... FDO package notes are bogus.
|
||||
Patch1: elfutils-0.186-fdo-swap.patch
|
||||
|
||||
# Prevent assert failure in readelf for some -ggdb3 binaries.
|
||||
Patch2: elfutils-0.194-alloc-jobs.patch
|
||||
|
||||
# Ensure sh_addr fields initialized to zero for ET_REL binaries.
|
||||
Patch3: elfutils-0.194-zero-sh_addr.patch
|
||||
|
||||
%description
|
||||
Elfutils is a collection of utilities, including stack (to show
|
||||
backtraces), nm (for listing symbols from object files), size
|
||||
@ -462,6 +456,7 @@ fi
|
||||
%{_mandir}/man3/elf_*.3*
|
||||
%{_mandir}/man3/elf32_*.3*
|
||||
%{_mandir}/man3/elf64_*.3*
|
||||
%{_mandir}/man3/gelf.3*
|
||||
%{_mandir}/man3/gelf_*.3*
|
||||
%{_mandir}/man3/libelf.3*
|
||||
|
||||
@ -525,6 +520,12 @@ exit 0
|
||||
%systemd_postun_with_restart debuginfod.service
|
||||
|
||||
%changelog
|
||||
* Thu Apr 23 2026 Aaron Merey <amerey@redhat.com> - 0.195-1
|
||||
- Upgrade to upstream elfutils 0.195
|
||||
- Drop upstreamed patches
|
||||
elfutils-0.194-zero-sh_addr.patch
|
||||
elfutils-0.194-alloc-jobs.patch
|
||||
|
||||
* Thr Mar 5 2026 Aaron Merey <amerey@redhat.com> - 0.194-2
|
||||
- Add elfutils-0.194-zero-sh_addr.patch
|
||||
|
||||
|
||||
2
sources
2
sources
@ -1 +1 @@
|
||||
SHA512 (elfutils-0.194.tar.bz2) = 5d00502f61b92643bf61dc61da4ddded36c423466388d992bcd388c5208761b8ed9db1a01492c085cd0984eef30c08f895a8e307e78e0df8df40b56ae35b78a5
|
||||
SHA512 (elfutils-0.195.tar.bz2) = e1e1fdf4f7f72bf520deb0103bb8fd208dc247bab14af100c6fb56d38c0ef6c6d54ff5bd15b84e4f70e2b2ea481e5999fea2842360f8932a861122df79b5fc8f
|
||||
|
||||
Loading…
Reference in New Issue
Block a user