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From 987ede93fa4e3d058acddc19874e467faa116ede Mon Sep 17 00:00:00 2001
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From: Janosch Frank <frankja@linux.ibm.com>
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Date: Mon, 17 Oct 2022 08:38:14 +0000
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Subject: [PATCH 33/42] dump: Write ELF section headers right after ELF header
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Cédric Le Goater <clg@redhat.com>
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RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
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RH-Bugzilla: 1664378 2043909
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
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RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
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RH-Commit: [33/41] e956040753533ac376e9763145192de1e216027d
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Let's start bundling the writes of the headers and of the data so we
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have a clear ordering between them. Since the ELF header uses offsets
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to the headers we can freely order them.
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Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
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Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
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Message-Id: <20221017083822.43118-3-frankja@linux.ibm.com>
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(cherry picked from commit cb415fd61e48d52f81dcf38956e3f913651cff1c)
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Signed-off-by: Cédric Le Goater <clg@redhat.com>
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---
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dump/dump.c | 31 ++++++++++++++-----------------
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1 file changed, 14 insertions(+), 17 deletions(-)
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diff --git a/dump/dump.c b/dump/dump.c
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index 4142b4cc0c..d17537d4e9 100644
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--- a/dump/dump.c
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+++ b/dump/dump.c
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@@ -584,6 +584,8 @@ static void dump_begin(DumpState *s, Error **errp)
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* --------------
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* | elf header |
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* --------------
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+ * | sctn_hdr |
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+ * --------------
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* | PT_NOTE |
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* --------------
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* | PT_LOAD |
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@@ -592,8 +594,6 @@ static void dump_begin(DumpState *s, Error **errp)
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* --------------
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* | PT_LOAD |
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* --------------
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- * | sec_hdr |
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- * --------------
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* | elf note |
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* --------------
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* | memory |
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@@ -609,20 +609,20 @@ static void dump_begin(DumpState *s, Error **errp)
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return;
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}
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- /* write PT_NOTE to vmcore */
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- write_elf_phdr_note(s, errp);
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+ /* write section headers to vmcore */
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+ write_elf_section_headers(s, errp);
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if (*errp) {
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return;
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}
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- /* write all PT_LOADs to vmcore */
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- write_elf_phdr_loads(s, errp);
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+ /* write PT_NOTE to vmcore */
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+ write_elf_phdr_note(s, errp);
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if (*errp) {
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return;
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}
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- /* write section headers to vmcore */
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- write_elf_section_headers(s, errp);
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+ /* write all PT_LOADs to vmcore */
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+ write_elf_phdr_loads(s, errp);
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if (*errp) {
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return;
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}
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@@ -1877,16 +1877,13 @@ static void dump_init(DumpState *s, int fd, bool has_format,
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}
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if (dump_is_64bit(s)) {
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- s->phdr_offset = sizeof(Elf64_Ehdr);
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- s->shdr_offset = s->phdr_offset + sizeof(Elf64_Phdr) * s->phdr_num;
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- s->note_offset = s->shdr_offset + sizeof(Elf64_Shdr) * s->shdr_num;
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- s->memory_offset = s->note_offset + s->note_size;
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+ s->shdr_offset = sizeof(Elf64_Ehdr);
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+ s->phdr_offset = s->shdr_offset + sizeof(Elf64_Shdr) * s->shdr_num;
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+ s->note_offset = s->phdr_offset + sizeof(Elf64_Phdr) * s->phdr_num;
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} else {
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-
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- s->phdr_offset = sizeof(Elf32_Ehdr);
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- s->shdr_offset = s->phdr_offset + sizeof(Elf32_Phdr) * s->phdr_num;
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- s->note_offset = s->shdr_offset + sizeof(Elf32_Shdr) * s->shdr_num;
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- s->memory_offset = s->note_offset + s->note_size;
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+ s->shdr_offset = sizeof(Elf32_Ehdr);
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+ s->phdr_offset = s->shdr_offset + sizeof(Elf32_Shdr) * s->shdr_num;
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+ s->note_offset = s->phdr_offset + sizeof(Elf32_Phdr) * s->phdr_num;
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}
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return;
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--
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2.37.3
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