linux-user: added x86 and x86_64 support for ELF coredump

Signed-off-by: NMika Westerberg <mika.westerberg@iki.fi>
Signed-off-by: NRiku Voipio <riku.voipio@iki.fi>

linux-user/elfload.c

@@ -134,6 +134,52 @@ static inline void init_thread(struct target_pt_regs *regs, struct image_info *i
     regs->rip = infop->entry;
 }
 
+typedef target_ulong    elf_greg_t;
+typedef uint32_t        target_uid_t;
+typedef uint32_t        target_gid_t;
+typedef int32_t         target_pid_t;
+
+#define ELF_NREG    27
+typedef elf_greg_t  elf_gregset_t[ELF_NREG];
+
+/*
+ * Note that ELF_NREG should be 29 as there should be place for
+ * TRAPNO and ERR "registers" as well but linux doesn't dump
+ * those.
+ *
+ * See linux kernel: arch/x86/include/asm/elf.h
+ */
+static void elf_core_copy_regs(elf_gregset_t *regs, const CPUState *env)
+{
+    (*regs)[0] = env->regs[15];
+    (*regs)[1] = env->regs[14];
+    (*regs)[2] = env->regs[13];
+    (*regs)[3] = env->regs[12];
+    (*regs)[4] = env->regs[R_EBP];
+    (*regs)[5] = env->regs[R_EBX];
+    (*regs)[6] = env->regs[11];
+    (*regs)[7] = env->regs[10];
+    (*regs)[8] = env->regs[9];
+    (*regs)[9] = env->regs[8];
+    (*regs)[10] = env->regs[R_EAX];
+    (*regs)[11] = env->regs[R_ECX];
+    (*regs)[12] = env->regs[R_EDX];
+    (*regs)[13] = env->regs[R_ESI];
+    (*regs)[14] = env->regs[R_EDI];
+    (*regs)[15] = env->regs[R_EAX]; /* XXX */
+    (*regs)[16] = env->eip;
+    (*regs)[17] = env->segs[R_CS].selector & 0xffff;
+    (*regs)[18] = env->eflags;
+    (*regs)[19] = env->regs[R_ESP];
+    (*regs)[20] = env->segs[R_SS].selector & 0xffff;
+    (*regs)[21] = env->segs[R_FS].selector & 0xffff;
+    (*regs)[22] = env->segs[R_GS].selector & 0xffff;
+    (*regs)[23] = env->segs[R_DS].selector & 0xffff;
+    (*regs)[24] = env->segs[R_ES].selector & 0xffff;
+    (*regs)[25] = env->segs[R_FS].selector & 0xffff;
+    (*regs)[26] = env->segs[R_GS].selector & 0xffff;
+}
+
 #else
 
 #define ELF_START_MMAP 0x80000000
@@ -164,8 +210,45 @@ static inline void init_thread(struct target_pt_regs *regs, struct image_info *i
        A value of 0 tells we have no such handler.  */
     regs->edx = 0;
 }
+
+typedef target_ulong    elf_greg_t;
+typedef uint16_t        target_uid_t;
+typedef uint16_t        target_gid_t;
+typedef int32_t         target_pid_t;
+
+#define ELF_NREG    17
+typedef elf_greg_t  elf_gregset_t[ELF_NREG];
+
+/*
+ * Note that ELF_NREG should be 19 as there should be place for
+ * TRAPNO and ERR "registers" as well but linux doesn't dump
+ * those.
+ *
+ * See linux kernel: arch/x86/include/asm/elf.h
+ */
+static void elf_core_copy_regs(elf_gregset_t *regs, const CPUState *env)
+{
+    (*regs)[0] = env->regs[R_EBX];
+    (*regs)[1] = env->regs[R_ECX];
+    (*regs)[2] = env->regs[R_EDX];
+    (*regs)[3] = env->regs[R_ESI];
+    (*regs)[4] = env->regs[R_EDI];
+    (*regs)[5] = env->regs[R_EBP];
+    (*regs)[6] = env->regs[R_EAX];
+    (*regs)[7] = env->segs[R_DS].selector & 0xffff;
+    (*regs)[8] = env->segs[R_ES].selector & 0xffff;
+    (*regs)[9] = env->segs[R_FS].selector & 0xffff;
+    (*regs)[10] = env->segs[R_GS].selector & 0xffff;
+    (*regs)[11] = env->regs[R_EAX]; /* XXX */
+    (*regs)[12] = env->eip;
+    (*regs)[13] = env->segs[R_CS].selector & 0xffff;
+    (*regs)[14] = env->eflags;
+    (*regs)[15] = env->regs[R_ESP];
+    (*regs)[16] = env->segs[R_SS].selector & 0xffff;
+}
 #endif
 
+#define USE_ELF_CORE_DUMP
 #define ELF_EXEC_PAGESIZE	4096
 
 #endif