[Qemu-devel] [PATCH 4/4] target-arm: add minimal dump-guest-memory support

[Rabin Vincent <rabin@rab.in>]

Add a minimal dump-guest-memory support for ARM.  The -p option is not
supported and we don't add any QEMU-specific notes.

Signed-off-by: Rabin Vincent <rabin@rab.in>
---
 configure                        |    4 +--
 target-arm/Makefile.objs         |    2 +-
 target-arm/arch_dump.c           |   59 ++++++++++++++++++++++++++++++++++++++
 target-arm/arch_memory_mapping.c |   13 +++++++++
 4 files changed, 75 insertions(+), 3 deletions(-)
 create mode 100644 target-arm/arch_dump.c
 create mode 100644 target-arm/arch_memory_mapping.c

diff --git a/configure b/configure
index b68c0ca..a20ad19 100755
--- a/configure
+++ b/configure
@@ -3727,7 +3727,7 @@ case "$target_arch2" in
     fi
 esac
 case "$target_arch2" in
-  i386|x86_64)
+  arm|i386|x86_64)
     echo "CONFIG_HAVE_GET_MEMORY_MAPPING=y" >> $config_target_mak
 esac
 if test "$target_arch2" = "ppc64" -a "$fdt" = "yes"; then
@@ -3746,7 +3746,7 @@ if test "$target_softmmu" = "yes" ; then
     echo "subdir-$target: subdir-libcacard" >> $config_host_mak
   fi
   case "$target_arch2" in
-    i386|x86_64)
+    arm|i386|x86_64)
       echo "CONFIG_HAVE_CORE_DUMP=y" >> $config_target_mak
   esac
 fi
diff --git a/target-arm/Makefile.objs b/target-arm/Makefile.objs
index f447c4f..837b374 100644
--- a/target-arm/Makefile.objs
+++ b/target-arm/Makefile.objs
@@ -1,5 +1,5 @@
 obj-y += arm-semi.o
-obj-$(CONFIG_SOFTMMU) += machine.o
+obj-$(CONFIG_SOFTMMU) += machine.o arch_memory_mapping.o arch_dump.o
 obj-y += translate.o op_helper.o helper.o cpu.o
 obj-y += neon_helper.o iwmmxt_helper.o
 
diff --git a/target-arm/arch_dump.c b/target-arm/arch_dump.c
new file mode 100644
index 0000000..47a7e40
--- /dev/null
+++ b/target-arm/arch_dump.c
@@ -0,0 +1,59 @@
+#include "cpu.h"
+#include "cpu-all.h"
+#include "dump.h"
+#include "elf.h"
+
+typedef struct {
+    char pad1[24];
+    uint32_t pid;
+    char pad2[44];
+    uint32_t regs[18];
+    char pad3[4];
+} arm_elf_prstatus;
+
+int cpu_write_elf64_note(write_core_dump_function f, CPUArchState *env,
+                         int cpuid, void *opaque)
+{
+    return -1;
+}
+
+int cpu_write_elf32_note(write_core_dump_function f, CPUArchState *env,
+                         int cpuid, void *opaque)
+{
+    arm_elf_prstatus prstatus;
+
+    memset(&prstatus, 0, sizeof(prstatus));
+    memcpy(&(prstatus.regs), env->regs, sizeof(env->regs));
+    prstatus.pid = cpuid;
+
+    return dump_write_elf_note(ELFCLASS32, "CORE", NT_PRSTATUS,
+                               &prstatus, sizeof(prstatus),
+                               f, opaque);
+}
+
+int cpu_write_elf64_qemunote(write_core_dump_function f, CPUArchState *env,
+                             void *opaque)
+{
+    return -1;
+}
+
+int cpu_write_elf32_qemunote(write_core_dump_function f, CPUArchState *env,
+                             void *opaque)
+{
+    return 0;
+}
+
+int cpu_get_dump_info(ArchDumpInfo *info)
+{
+    info->d_machine = EM_ARM;
+    info->d_endian = ELFDATA2LSB;
+    info->d_class = ELFCLASS32;
+
+    return 0;
+}
+
+ssize_t cpu_get_note_size(int class, int machine, int nr_cpus)
+{
+    return nr_cpus * dump_get_note_size(ELFCLASS32, "CORE",
+                                        sizeof(arm_elf_prstatus));
+}
diff --git a/target-arm/arch_memory_mapping.c b/target-arm/arch_memory_mapping.c
new file mode 100644
index 0000000..eeaaf09
--- /dev/null
+++ b/target-arm/arch_memory_mapping.c
@@ -0,0 +1,13 @@
+#include "cpu.h"
+#include "cpu-all.h"
+#include "memory_mapping.h"
+
+bool cpu_paging_enabled(CPUArchState *env)
+{
+    return 0;
+}
+
+int cpu_get_memory_mapping(MemoryMappingList *list, CPUArchState *env)
+{
+    return -1;
+}
-- 
1.7.9.5