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From c851676d202b5b76962529f3b6d433936becbd8a Mon Sep 17 00:00:00 2001
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From: Janosch Frank <frankja@linux.ibm.com>
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Date: Wed, 30 Mar 2022 12:36:00 +0000
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Subject: [PATCH 18/42] dump: Introduce dump_is_64bit() helper function
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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: [18/41] a0fd2d1985c61b8e50d4a7ca26bc0ee6fcaa6196
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Checking d_class in dump_info leads to lengthy conditionals so let's
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shorten things a bit by introducing a helper function.
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Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
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Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
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Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
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Message-Id: <20220330123603.107120-7-frankja@linux.ibm.com>
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(cherry picked from commit 05bbaa5040ccb3419e8b93af8040485430e2db42)
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Signed-off-by: Cédric Le Goater <clg@redhat.com>
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---
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dump/dump.c | 25 +++++++++++++++----------
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1 file changed, 15 insertions(+), 10 deletions(-)
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diff --git a/dump/dump.c b/dump/dump.c
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index 85a402b38c..6394e94023 100644
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--- a/dump/dump.c
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+++ b/dump/dump.c
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@@ -55,6 +55,11 @@ static Error *dump_migration_blocker;
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DIV_ROUND_UP((name_size), 4) + \
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DIV_ROUND_UP((desc_size), 4)) * 4)
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+static inline bool dump_is_64bit(DumpState *s)
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+{
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+ return s->dump_info.d_class == ELFCLASS64;
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+}
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+
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uint16_t cpu_to_dump16(DumpState *s, uint16_t val)
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{
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if (s->dump_info.d_endian == ELFDATA2LSB) {
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@@ -489,7 +494,7 @@ static void write_elf_loads(DumpState *s, Error **errp)
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get_offset_range(memory_mapping->phys_addr,
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memory_mapping->length,
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s, &offset, &filesz);
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- if (s->dump_info.d_class == ELFCLASS64) {
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+ if (dump_is_64bit(s)) {
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write_elf64_load(s, memory_mapping, phdr_index++, offset,
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filesz, errp);
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} else {
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@@ -537,7 +542,7 @@ static void dump_begin(DumpState *s, Error **errp)
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*/
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/* write elf header to vmcore */
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- if (s->dump_info.d_class == ELFCLASS64) {
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+ if (dump_is_64bit(s)) {
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write_elf64_header(s, errp);
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} else {
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write_elf32_header(s, errp);
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@@ -546,7 +551,7 @@ static void dump_begin(DumpState *s, Error **errp)
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return;
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}
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- if (s->dump_info.d_class == ELFCLASS64) {
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+ if (dump_is_64bit(s)) {
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/* write PT_NOTE to vmcore */
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write_elf64_note(s, errp);
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if (*errp) {
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@@ -757,7 +762,7 @@ static void get_note_sizes(DumpState *s, const void *note,
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uint64_t name_sz;
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uint64_t desc_sz;
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- if (s->dump_info.d_class == ELFCLASS64) {
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+ if (dump_is_64bit(s)) {
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const Elf64_Nhdr *hdr = note;
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note_head_sz = sizeof(Elf64_Nhdr);
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name_sz = tswap64(hdr->n_namesz);
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@@ -1017,10 +1022,10 @@ out:
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static void write_dump_header(DumpState *s, Error **errp)
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{
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- if (s->dump_info.d_class == ELFCLASS32) {
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- create_header32(s, errp);
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- } else {
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+ if (dump_is_64bit(s)) {
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create_header64(s, errp);
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+ } else {
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+ create_header32(s, errp);
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}
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}
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@@ -1715,8 +1720,8 @@ static void dump_init(DumpState *s, int fd, bool has_format,
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uint32_t size;
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uint16_t format;
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- note_head_size = s->dump_info.d_class == ELFCLASS32 ?
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- sizeof(Elf32_Nhdr) : sizeof(Elf64_Nhdr);
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+ note_head_size = dump_is_64bit(s) ?
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+ sizeof(Elf64_Nhdr) : sizeof(Elf32_Nhdr);
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format = le16_to_cpu(vmci->vmcoreinfo.guest_format);
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size = le32_to_cpu(vmci->vmcoreinfo.size);
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@@ -1819,7 +1824,7 @@ static void dump_init(DumpState *s, int fd, bool has_format,
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}
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}
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- if (s->dump_info.d_class == ELFCLASS64) {
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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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--
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2.37.3
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