[Qemu-devel] [PATCH 3/4] dump: extract out get note size function

[Rabin Vincent <rabin@rab.in>]

Extract out the ELF note size function from i386 so we can use it from
other targets.

Signed-off-by: Rabin Vincent <rabin@rab.in>
---
 dump.c                  |   15 +++++++++++++++
 dump.h                  |    2 ++
 target-i386/arch_dump.c |   14 ++------------
 3 files changed, 19 insertions(+), 12 deletions(-)

diff --git a/dump.c b/dump.c
index be96c6c..d3ca953 100644
--- a/dump.c
+++ b/dump.c
@@ -468,6 +468,21 @@ static target_phys_addr_t get_offset(target_phys_addr_t phys_addr,
     return -1;
 }
 
+size_t dump_get_note_size(int class, const char *name, size_t descsz)
+{
+    int name_size = strlen(name) + 1;
+    int note_head_size;
+
+    if (class == ELFCLASS32) {
+        note_head_size = sizeof(Elf32_Nhdr);
+    } else {
+        note_head_size = sizeof(Elf64_Nhdr);
+    }
+
+    return ((note_head_size + 3) / 4 + (name_size + 3) / 4
+            + (descsz + 3) / 4) * 4;
+}
+
 int dump_write_elf_note(int class, const char *name, uint32_t type,
                         void *desc, size_t descsz,
                         write_core_dump_function f, void *opaque)
diff --git a/dump.h b/dump.h
index b07816a..a06b149 100644
--- a/dump.h
+++ b/dump.h
@@ -36,4 +36,6 @@ int dump_write_elf_note(int class, const char *name, uint32_t type, void *desc,
                         size_t descsz, write_core_dump_function f,
                         void *opaque);
 
+size_t dump_get_note_size(int class, const char *name, size_t descsz);
+
 #endif
diff --git a/target-i386/arch_dump.c b/target-i386/arch_dump.c
index dbc94bc..e2d18a0 100644
--- a/target-i386/arch_dump.c
+++ b/target-i386/arch_dump.c
@@ -305,18 +305,10 @@ int cpu_get_dump_info(ArchDumpInfo *info)
 
 ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
 {
-    int name_size = 5; /* "CORE" or "QEMU" */
     size_t elf_note_size = 0;
     size_t qemu_note_size = 0;
     int elf_desc_size = 0;
     int qemu_desc_size = 0;
-    int note_head_size;
-
-    if (class == ELFCLASS32) {
-        note_head_size = sizeof(Elf32_Nhdr);
-    } else {
-        note_head_size = sizeof(Elf64_Nhdr);
-    }
 
     if (machine == EM_386) {
         elf_desc_size = sizeof(x86_elf_prstatus);
@@ -328,10 +320,8 @@ ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
 #endif
     qemu_desc_size = sizeof(QEMUCPUState);
 
-    elf_note_size = ((note_head_size + 3) / 4 + (name_size + 3) / 4 +
-                     (elf_desc_size + 3) / 4) * 4;
-    qemu_note_size = ((note_head_size + 3) / 4 + (name_size + 3) / 4 +
-                      (qemu_desc_size + 3) / 4) * 4;
+    elf_note_size = dump_get_note_size(class, "CORE", elf_desc_size);
+    qemu_note_size = dump_get_note_size(class, "QEMU", qemu_desc_size);
 
     return (elf_note_size + qemu_note_size) * nr_cpus;
 }
-- 
1.7.9.5