Patchwork [09/12,v13] target-i386: add API to get dump info

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Submitter Wen Congyang
Date April 18, 2012, 12:56 p.m.
Message ID <4F8EB9FE.10805@cn.fujitsu.com>
Download mbox | patch
Permalink /patch/153501/
State New
Headers show

Comments

Wen Congyang - April 18, 2012, 12:56 p.m.
Dump info contains: endian, class and architecture. The next
patch will use these information to create vmcore. Note: on
x86 box, the  class is ELFCLASS64 if the memory is larger than 4G.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
---
 cpu-all.h               |    7 +++++++
 dump.h                  |   23 +++++++++++++++++++++++
 target-i386/arch_dump.c |   34 ++++++++++++++++++++++++++++++++++
 3 files changed, 64 insertions(+), 0 deletions(-)
 create mode 100644 dump.h

Patch

diff --git a/cpu-all.h b/cpu-all.h
index 0ea1f7f..1a1a06d 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -23,6 +23,7 @@ 
 #include "qemu-tls.h"
 #include "cpu-common.h"
 #include "memory_mapping.h"
+#include "dump.h"
 
 /* some important defines:
  *
@@ -553,6 +554,7 @@  int cpu_write_elf64_qemunote(write_core_dump_function f, CPUArchState *env,
                              void *opaque);
 int cpu_write_elf32_qemunote(write_core_dump_function f, CPUArchState *env,
                              void *opaque);
+int cpu_get_dump_info(ArchDumpInfo *info);
 #else
 static inline int cpu_write_elf64_note(write_core_dump_function f,
                                        CPUArchState *env, int cpuid,
@@ -581,6 +583,11 @@  static inline int cpu_write_elf32_qemunote(write_core_dump_function f,
 {
     return -1;
 }
+
+static inline int cpu_get_dump_info(ArchDumpInfo *info)
+{
+    return -1;
+}
 #endif
 
 #endif /* CPU_ALL_H */
diff --git a/dump.h b/dump.h
new file mode 100644
index 0000000..28340cf
--- /dev/null
+++ b/dump.h
@@ -0,0 +1,23 @@ 
+/*
+ * QEMU dump
+ *
+ * Copyright Fujitsu, Corp. 2011, 2012
+ *
+ * Authors:
+ *     Wen Congyang <wency@cn.fujitsu.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef DUMP_H
+#define DUMP_H
+
+typedef struct ArchDumpInfo {
+    int d_machine;  /* Architecture */
+    int d_endian;   /* ELFDATA2LSB or ELFDATA2MSB */
+    int d_class;    /* ELFCLASS32 or ELFCLASS64 */
+} ArchDumpInfo;
+
+#endif
diff --git a/target-i386/arch_dump.c b/target-i386/arch_dump.c
index ddbe20c..e378579 100644
--- a/target-i386/arch_dump.c
+++ b/target-i386/arch_dump.c
@@ -13,6 +13,7 @@ 
 
 #include "cpu.h"
 #include "cpu-all.h"
+#include "dump.h"
 #include "elf.h"
 
 #ifdef TARGET_X86_64
@@ -380,3 +381,36 @@  int cpu_write_elf32_qemunote(write_core_dump_function f, CPUArchState *env,
 {
     return cpu_write_qemu_note(f, env, opaque, 0);
 }
+
+int cpu_get_dump_info(ArchDumpInfo *info)
+{
+    bool lma = false;
+    RAMBlock *block;
+
+#ifdef TARGET_X86_64
+    lma = !!(first_cpu->hflags & HF_LMA_MASK);
+#endif
+
+    if (lma) {
+        info->d_machine = EM_X86_64;
+    } else {
+        info->d_machine = EM_386;
+    }
+    info->d_endian = ELFDATA2LSB;
+
+    if (lma) {
+        info->d_class = ELFCLASS64;
+    } else {
+        info->d_class = ELFCLASS32;
+
+        QLIST_FOREACH(block, &ram_list.blocks, next) {
+            if (block->offset + block->length > UINT_MAX) {
+                /* The memory size is greater than 4G */
+                info->d_class = ELFCLASS64;
+                break;
+            }
+        }
+    }
+
+    return 0;
+}