forked from rpms/qemu-kvm
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
139 lines
5.7 KiB
139 lines
5.7 KiB
From bee31226b87d0b05faae84e88cce3af1b8dabbfd Mon Sep 17 00:00:00 2001
|
|
From: Janosch Frank <frankja@linux.ibm.com>
|
|
Date: Wed, 30 Mar 2022 12:35:59 +0000
|
|
Subject: [PATCH 17/42] dump: Add more offset variables
|
|
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: [17/41] fbe629e1476e8a0e039f989af6e1f4707075ba01
|
|
|
|
Offset calculations are easy enough to get wrong. Let's add a few
|
|
variables to make moving around elf headers and data sections easier.
|
|
|
|
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
|
|
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
|
|
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
|
|
Message-Id: <20220330123603.107120-6-frankja@linux.ibm.com>
|
|
(cherry picked from commit e71d353360bb09a8e784e35d78370c691f6ea185)
|
|
Signed-off-by: Cédric Le Goater <clg@redhat.com>
|
|
---
|
|
dump/dump.c | 35 +++++++++++++++--------------------
|
|
include/sysemu/dump.h | 4 ++++
|
|
2 files changed, 19 insertions(+), 20 deletions(-)
|
|
|
|
diff --git a/dump/dump.c b/dump/dump.c
|
|
index 5cc2322325..85a402b38c 100644
|
|
--- a/dump/dump.c
|
|
+++ b/dump/dump.c
|
|
@@ -142,13 +142,11 @@ static void write_elf64_header(DumpState *s, Error **errp)
|
|
elf_header.e_machine = cpu_to_dump16(s, s->dump_info.d_machine);
|
|
elf_header.e_version = cpu_to_dump32(s, EV_CURRENT);
|
|
elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header));
|
|
- elf_header.e_phoff = cpu_to_dump64(s, sizeof(Elf64_Ehdr));
|
|
+ elf_header.e_phoff = cpu_to_dump64(s, s->phdr_offset);
|
|
elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf64_Phdr));
|
|
elf_header.e_phnum = cpu_to_dump16(s, phnum);
|
|
if (s->shdr_num) {
|
|
- uint64_t shoff = sizeof(Elf64_Ehdr) + sizeof(Elf64_Phdr) * s->phdr_num;
|
|
-
|
|
- elf_header.e_shoff = cpu_to_dump64(s, shoff);
|
|
+ elf_header.e_shoff = cpu_to_dump64(s, s->shdr_offset);
|
|
elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf64_Shdr));
|
|
elf_header.e_shnum = cpu_to_dump16(s, s->shdr_num);
|
|
}
|
|
@@ -179,13 +177,11 @@ static void write_elf32_header(DumpState *s, Error **errp)
|
|
elf_header.e_machine = cpu_to_dump16(s, s->dump_info.d_machine);
|
|
elf_header.e_version = cpu_to_dump32(s, EV_CURRENT);
|
|
elf_header.e_ehsize = cpu_to_dump16(s, sizeof(elf_header));
|
|
- elf_header.e_phoff = cpu_to_dump32(s, sizeof(Elf32_Ehdr));
|
|
+ elf_header.e_phoff = cpu_to_dump32(s, s->phdr_offset);
|
|
elf_header.e_phentsize = cpu_to_dump16(s, sizeof(Elf32_Phdr));
|
|
elf_header.e_phnum = cpu_to_dump16(s, phnum);
|
|
if (s->shdr_num) {
|
|
- uint32_t shoff = sizeof(Elf32_Ehdr) + sizeof(Elf32_Phdr) * s->phdr_num;
|
|
-
|
|
- elf_header.e_shoff = cpu_to_dump32(s, shoff);
|
|
+ elf_header.e_shoff = cpu_to_dump32(s, s->shdr_offset);
|
|
elf_header.e_shentsize = cpu_to_dump16(s, sizeof(Elf32_Shdr));
|
|
elf_header.e_shnum = cpu_to_dump16(s, s->shdr_num);
|
|
}
|
|
@@ -248,12 +244,11 @@ static void write_elf32_load(DumpState *s, MemoryMapping *memory_mapping,
|
|
static void write_elf64_note(DumpState *s, Error **errp)
|
|
{
|
|
Elf64_Phdr phdr;
|
|
- hwaddr begin = s->memory_offset - s->note_size;
|
|
int ret;
|
|
|
|
memset(&phdr, 0, sizeof(Elf64_Phdr));
|
|
phdr.p_type = cpu_to_dump32(s, PT_NOTE);
|
|
- phdr.p_offset = cpu_to_dump64(s, begin);
|
|
+ phdr.p_offset = cpu_to_dump64(s, s->note_offset);
|
|
phdr.p_paddr = 0;
|
|
phdr.p_filesz = cpu_to_dump64(s, s->note_size);
|
|
phdr.p_memsz = cpu_to_dump64(s, s->note_size);
|
|
@@ -313,13 +308,12 @@ static void write_elf64_notes(WriteCoreDumpFunction f, DumpState *s,
|
|
|
|
static void write_elf32_note(DumpState *s, Error **errp)
|
|
{
|
|
- hwaddr begin = s->memory_offset - s->note_size;
|
|
Elf32_Phdr phdr;
|
|
int ret;
|
|
|
|
memset(&phdr, 0, sizeof(Elf32_Phdr));
|
|
phdr.p_type = cpu_to_dump32(s, PT_NOTE);
|
|
- phdr.p_offset = cpu_to_dump32(s, begin);
|
|
+ phdr.p_offset = cpu_to_dump32(s, s->note_offset);
|
|
phdr.p_paddr = 0;
|
|
phdr.p_filesz = cpu_to_dump32(s, s->note_size);
|
|
phdr.p_memsz = cpu_to_dump32(s, s->note_size);
|
|
@@ -1826,15 +1820,16 @@ static void dump_init(DumpState *s, int fd, bool has_format,
|
|
}
|
|
|
|
if (s->dump_info.d_class == ELFCLASS64) {
|
|
- s->memory_offset = sizeof(Elf64_Ehdr) +
|
|
- sizeof(Elf64_Phdr) * s->phdr_num +
|
|
- sizeof(Elf64_Shdr) * s->shdr_num +
|
|
- s->note_size;
|
|
+ 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;
|
|
} else {
|
|
- s->memory_offset = sizeof(Elf32_Ehdr) +
|
|
- sizeof(Elf32_Phdr) * s->phdr_num +
|
|
- sizeof(Elf32_Shdr) * s->shdr_num +
|
|
- s->note_size;
|
|
+
|
|
+ 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;
|
|
}
|
|
|
|
return;
|
|
diff --git a/include/sysemu/dump.h b/include/sysemu/dump.h
|
|
index 19458bffbd..ffc2ea1072 100644
|
|
--- a/include/sysemu/dump.h
|
|
+++ b/include/sysemu/dump.h
|
|
@@ -159,6 +159,10 @@ typedef struct DumpState {
|
|
bool resume;
|
|
bool detached;
|
|
ssize_t note_size;
|
|
+ hwaddr shdr_offset;
|
|
+ hwaddr phdr_offset;
|
|
+ hwaddr section_offset;
|
|
+ hwaddr note_offset;
|
|
hwaddr memory_offset;
|
|
int fd;
|
|
|
|
--
|
|
2.37.3
|
|
|