[Qemu-devel] [RFC][PATCH 7/8 v3] target-i386: add API to get dump info

[Wen Congyang <wency@cn.fujitsu.com>]

Dump info contains: endian, class and architecture. The next
patch will use these information to create vmcore.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
---
 cpu-all.h               |    3 +++
 dump.h                  |   10 ++++++++++
 target-i386/arch-dump.c |   34 ++++++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+), 0 deletions(-)
 create mode 100644 dump.h

diff --git a/cpu-all.h b/cpu-all.h
index 4d87d51..c53221a 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:
  *
@@ -592,11 +593,13 @@ int cpu_write_elf64_note(Monitor *mon, int fd, CPUState *env, int cpuid,
 int cpu_write_elf32_note(Monitor *mon, int fd, CPUState *env, int cpuid,
                          target_phys_addr_t *offset);
 int cpu_add_extra_memory_mapping(Monitor *mon, MemoryMappingList *list);
+int cpu_get_dump_info(DumpInfo *info);
 #else
 #define cpu_get_memory_mapping(list, env)
 #define cpu_write_elf64_note(mon, fd, env, cpuid, offset) ({ -1; })
 #define cpu_write_elf32_note(mon, fd, env, cpuid, offset) ({ -1; })
 #define cpu_add_extra_memory_mapping(mon, list) ({ 0; })
+#define cpu_get_dump_info(info) ({ -1; })
 #endif
 
 #endif /* CPU_ALL_H */
diff --git a/dump.h b/dump.h
new file mode 100644
index 0000000..a37de45
--- /dev/null
+++ b/dump.h
@@ -0,0 +1,10 @@
+#ifndef DUMP_H
+#define DUMP_H
+
+typedef struct DumpInfo {
+    int d_machine;  /* Architecture */
+    int d_endian;   /* ELFDATA2LSB or ELFDATA2MSB */
+    int d_class;    /* ELFCLASS32 or ELFCLASS64 */
+} DumpInfo;
+
+#endif
diff --git a/target-i386/arch-dump.c b/target-i386/arch-dump.c
index 2410c6a..87b19b6 100644
--- a/target-i386/arch-dump.c
+++ b/target-i386/arch-dump.c
@@ -15,6 +15,7 @@
 
 #include "cpu.h"
 #include "cpu-all.h"
+#include "dump.h"
 #include "monitor.h"
 
 /* PAE Paging or IA-32e Paging */
@@ -542,3 +543,36 @@ int cpu_add_extra_memory_mapping(Monitor *mon, MemoryMappingList *list)
 #endif
     return 0;
 }
+
+int cpu_get_dump_info(DumpInfo *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 (!lma && (block->offset + block->length > UINT_MAX)) {
+            /* The memory size is greater than 4G */
+            info->d_class = ELFCLASS32;
+            break;
+        }
+    }
+
+    return 0;
+}
-- 
1.7.1