nios2: Add usermode binaries emulation

[mirror_qemu.git] / linux-user / elfload.c

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 51794bbb4595f44b009ce1075598251ac58590f8..c66cbbe84b7f8f2409ac5223fff307990cf53125 100644 (file)
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -967,6 +967,63 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env
 
 #endif /* TARGET_MICROBLAZE */
 
+#ifdef TARGET_NIOS2
+
+#define ELF_START_MMAP 0x80000000
+
+#define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2)
+
+#define ELF_CLASS   ELFCLASS32
+#define ELF_ARCH    EM_ALTERA_NIOS2
+
+static void init_thread(struct target_pt_regs *regs, struct image_info *infop)
+{
+    regs->ea = infop->entry;
+    regs->sp = infop->start_stack;
+    regs->estatus = 0x3;
+}
+
+#define ELF_EXEC_PAGESIZE        4096
+
+#define USE_ELF_CORE_DUMP
+#define ELF_NREG 49
+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 CPUNios2State *env)
+{
+    int i;
+
+    (*regs)[0] = -1;
+    for (i = 1; i < 8; i++)    /* r0-r7 */
+        (*regs)[i] = tswapreg(env->regs[i + 7]);
+
+    for (i = 8; i < 16; i++)   /* r8-r15 */
+        (*regs)[i] = tswapreg(env->regs[i - 8]);
+
+    for (i = 16; i < 24; i++)  /* r16-r23 */
+        (*regs)[i] = tswapreg(env->regs[i + 7]);
+    (*regs)[24] = -1;    /* R_ET */
+    (*regs)[25] = -1;    /* R_BT */
+    (*regs)[26] = tswapreg(env->regs[R_GP]);
+    (*regs)[27] = tswapreg(env->regs[R_SP]);
+    (*regs)[28] = tswapreg(env->regs[R_FP]);
+    (*regs)[29] = tswapreg(env->regs[R_EA]);
+    (*regs)[30] = -1;    /* R_SSTATUS */
+    (*regs)[31] = tswapreg(env->regs[R_RA]);
+
+    (*regs)[32] = tswapreg(env->regs[R_PC]);
+
+    (*regs)[33] = -1; /* R_STATUS */
+    (*regs)[34] = tswapreg(env->regs[CR_ESTATUS]);
+
+    for (i = 35; i < 49; i++)    /* ... */
+        (*regs)[i] = -1;
+}
+
+#endif /* TARGET_NIOS2 */
+
 #ifdef TARGET_OPENRISC
 
 #define ELF_START_MMAP 0x08000000