microblaze: Add linux-user core dumping support.

Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

linux-user/elfload.c

@@ -644,6 +644,24 @@ static inline void init_thread(struct target_pt_regs *regs, struct image_info *i
 
 #define ELF_EXEC_PAGESIZE        4096
 
+#define USE_ELF_CORE_DUMP
+#define ELF_NREG 38
+typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
+
+/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs.  */
+static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUState *env)
+{
+    int i, pos = 0;
+
+    for (i = 0; i < 32; i++) {
+        (*regs)[pos++] = tswapl(env->regs[i]);
+    }
+
+    for (i = 0; i < 6; i++) {
+        (*regs)[pos++] = tswapl(env->sregs[i]);
+    }
+}
+
 #endif /* TARGET_MICROBLAZE */
 
 #ifdef TARGET_SH4