linux-user: add core dump support for MIPS

Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index d284108..b17cf64 100644 (file)
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -594,6 +594,52 @@ static inline void init_thread(struct target_pt_regs *regs, struct image_info *i
     regs->regs[29] = infop->start_stack;
 }
 
+/* See linux kernel: arch/mips/include/asm/elf.h.  */
+#define ELF_NREG 45
+typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];
+
+/* See linux kernel: arch/mips/include/asm/reg.h.  */
+enum {
+#ifdef TARGET_MIPS64
+    TARGET_EF_R0 = 0,
+#else
+    TARGET_EF_R0 = 6,
+#endif
+    TARGET_EF_R26 = TARGET_EF_R0 + 26,
+    TARGET_EF_R27 = TARGET_EF_R0 + 27,
+    TARGET_EF_LO = TARGET_EF_R0 + 32,
+    TARGET_EF_HI = TARGET_EF_R0 + 33,
+    TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
+    TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
+    TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
+    TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
+};
+
+/* 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;
+
+    for (i = 0; i < TARGET_EF_R0; i++) {
+        (*regs)[i] = 0;
+    }
+    (*regs)[TARGET_EF_R0] = 0;
+
+    for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
+        (*regs)[TARGET_EF_R0 + i] = tswapl(env->active_tc.gpr[i]);
+    }
+
+    (*regs)[TARGET_EF_R26] = 0;
+    (*regs)[TARGET_EF_R27] = 0;
+    (*regs)[TARGET_EF_LO] = tswapl(env->active_tc.LO[0]);
+    (*regs)[TARGET_EF_HI] = tswapl(env->active_tc.HI[0]);
+    (*regs)[TARGET_EF_CP0_EPC] = tswapl(env->active_tc.PC);
+    (*regs)[TARGET_EF_CP0_BADVADDR] = tswapl(env->CP0_BadVAddr);
+    (*regs)[TARGET_EF_CP0_STATUS] = tswapl(env->CP0_Status);
+    (*regs)[TARGET_EF_CP0_CAUSE] = tswapl(env->CP0_Cause);
+}
+
+#define USE_ELF_CORE_DUMP
 #define ELF_EXEC_PAGESIZE        4096
 
 #endif /* TARGET_MIPS */