qemu-kvm/kvm-dump-Write-ELF-section-headers-right-after-ELF-heade.patch

105 lines
3.6 KiB
Diff
Raw Normal View History

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