Initial import of qemu-2.4.1HEADmaster

1 files changed, 320 insertions, 0 deletions

diff --git a/target-ppc/gdbstub.c b/target-ppc/gdbstub.c
new file mode 100644
index 00000000..14675f45
--- /dev/null
+++ b/target-ppc/gdbstub.c
@@ -0,0 +1,320 @@
+/*
+ * PowerPC gdb server stub
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ * Copyright (c) 2013 SUSE LINUX Products GmbH
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "config.h"
+#include "qemu-common.h"
+#include "exec/gdbstub.h"
+
+static int ppc_gdb_register_len_apple(int n)
+{
+    switch (n) {
+    case 0 ... 31:
+        /* gprs */
+        return 8;
+    case 32 ... 63:
+        /* fprs */
+        return 8;
+    case 64 ... 95:
+        return 16;
+    case 64+32: /* nip */
+    case 65+32: /* msr */
+    case 67+32: /* lr */
+    case 68+32: /* ctr */
+    case 69+32: /* xer */
+    case 70+32: /* fpscr */
+        return 8;
+    case 66+32: /* cr */
+        return 4;
+    default:
+        return 0;
+    }
+}
+
+static int ppc_gdb_register_len(int n)
+{
+    switch (n) {
+    case 0 ... 31:
+        /* gprs */
+        return sizeof(target_ulong);
+    case 32 ... 63:
+        /* fprs */
+        if (gdb_has_xml) {
+            return 0;
+        }
+        return 8;
+    case 66:
+        /* cr */
+        return 4;
+    case 64:
+        /* nip */
+    case 65:
+        /* msr */
+    case 67:
+        /* lr */
+    case 68:
+        /* ctr */
+    case 69:
+        /* xer */
+        return sizeof(target_ulong);
+    case 70:
+        /* fpscr */
+        if (gdb_has_xml) {
+            return 0;
+        }
+        return sizeof(target_ulong);
+    default:
+        return 0;
+    }
+}
+
+/* We need to present the registers to gdb in the "current" memory ordering.
+   For user-only mode we get this for free; TARGET_WORDS_BIGENDIAN is set to
+   the proper ordering for the binary, and cannot be changed.
+   For system mode, TARGET_WORDS_BIGENDIAN is always set, and we must check
+   the current mode of the chip to see if we're running in little-endian.  */
+static void maybe_bswap_register(CPUPPCState *env, uint8_t *mem_buf, int len)
+{
+#ifndef CONFIG_USER_ONLY
+    if (!msr_le) {
+        /* do nothing */
+    } else if (len == 4) {
+        bswap32s((uint32_t *)mem_buf);
+    } else if (len == 8) {
+        bswap64s((uint64_t *)mem_buf);
+    } else {
+        g_assert_not_reached();
+    }
+#endif
+}
+
+/* Old gdb always expects FP registers.  Newer (xml-aware) gdb only
+ * expects whatever the target description contains.  Due to a
+ * historical mishap the FP registers appear in between core integer
+ * regs and PC, MSR, CR, and so forth.  We hack round this by giving the
+ * FP regs zero size when talking to a newer gdb.
+ */
+
+int ppc_cpu_gdb_read_register(CPUState *cs, uint8_t *mem_buf, int n)
+{
+    PowerPCCPU *cpu = POWERPC_CPU(cs);
+    CPUPPCState *env = &cpu->env;
+    int r = ppc_gdb_register_len(n);
+
+    if (!r) {
+        return r;
+    }
+
+    if (n < 32) {
+        /* gprs */
+        gdb_get_regl(mem_buf, env->gpr[n]);
+    } else if (n < 64) {
+        /* fprs */
+        stfq_p(mem_buf, env->fpr[n-32]);
+    } else {
+        switch (n) {
+        case 64:
+            gdb_get_regl(mem_buf, env->nip);
+            break;
+        case 65:
+            gdb_get_regl(mem_buf, env->msr);
+            break;
+        case 66:
+            {
+                uint32_t cr = 0;
+                int i;
+                for (i = 0; i < 8; i++) {
+                    cr |= env->crf[i] << (32 - ((i + 1) * 4));
+                }
+                gdb_get_reg32(mem_buf, cr);
+                break;
+            }
+        case 67:
+            gdb_get_regl(mem_buf, env->lr);
+            break;
+        case 68:
+            gdb_get_regl(mem_buf, env->ctr);
+            break;
+        case 69:
+            gdb_get_regl(mem_buf, env->xer);
+            break;
+        case 70:
+            gdb_get_reg32(mem_buf, env->fpscr);
+            break;
+        }
+    }
+    maybe_bswap_register(env, mem_buf, r);
+    return r;
+}
+
+int ppc_cpu_gdb_read_register_apple(CPUState *cs, uint8_t *mem_buf, int n)
+{
+    PowerPCCPU *cpu = POWERPC_CPU(cs);
+    CPUPPCState *env = &cpu->env;
+    int r = ppc_gdb_register_len_apple(n);
+
+    if (!r) {
+        return r;
+    }
+
+    if (n < 32) {
+        /* gprs */
+        gdb_get_reg64(mem_buf, env->gpr[n]);
+    } else if (n < 64) {
+        /* fprs */
+        stfq_p(mem_buf, env->fpr[n-32]);
+    } else if (n < 96) {
+        /* Altivec */
+        stq_p(mem_buf, n - 64);
+        stq_p(mem_buf + 8, 0);
+    } else {
+        switch (n) {
+        case 64 + 32:
+            gdb_get_reg64(mem_buf, env->nip);
+            break;
+        case 65 + 32:
+            gdb_get_reg64(mem_buf, env->msr);
+            break;
+        case 66 + 32:
+            {
+                uint32_t cr = 0;
+                int i;
+                for (i = 0; i < 8; i++) {
+                    cr |= env->crf[i] << (32 - ((i + 1) * 4));
+                }
+                gdb_get_reg32(mem_buf, cr);
+                break;
+            }
+        case 67 + 32:
+            gdb_get_reg64(mem_buf, env->lr);
+            break;
+        case 68 + 32:
+            gdb_get_reg64(mem_buf, env->ctr);
+            break;
+        case 69 + 32:
+            gdb_get_reg64(mem_buf, env->xer);
+            break;
+        case 70 + 32:
+            gdb_get_reg64(mem_buf, env->fpscr);
+            break;
+        }
+    }
+    maybe_bswap_register(env, mem_buf, r);
+    return r;
+}
+
+int ppc_cpu_gdb_write_register(CPUState *cs, uint8_t *mem_buf, int n)
+{
+    PowerPCCPU *cpu = POWERPC_CPU(cs);
+    CPUPPCState *env = &cpu->env;
+    int r = ppc_gdb_register_len(n);
+
+    if (!r) {
+        return r;
+    }
+    maybe_bswap_register(env, mem_buf, r);
+    if (n < 32) {
+        /* gprs */
+        env->gpr[n] = ldtul_p(mem_buf);
+    } else if (n < 64) {
+        /* fprs */
+        env->fpr[n-32] = ldfq_p(mem_buf);
+    } else {
+        switch (n) {
+        case 64:
+            env->nip = ldtul_p(mem_buf);
+            break;
+        case 65:
+            ppc_store_msr(env, ldtul_p(mem_buf));
+            break;
+        case 66:
+            {
+                uint32_t cr = ldl_p(mem_buf);
+                int i;
+                for (i = 0; i < 8; i++) {
+                    env->crf[i] = (cr >> (32 - ((i + 1) * 4))) & 0xF;
+                }
+                break;
+            }
+        case 67:
+            env->lr = ldtul_p(mem_buf);
+            break;
+        case 68:
+            env->ctr = ldtul_p(mem_buf);
+            break;
+        case 69:
+            env->xer = ldtul_p(mem_buf);
+            break;
+        case 70:
+            /* fpscr */
+            store_fpscr(env, ldtul_p(mem_buf), 0xffffffff);
+            break;
+        }
+    }
+    return r;
+}
+int ppc_cpu_gdb_write_register_apple(CPUState *cs, uint8_t *mem_buf, int n)
+{
+    PowerPCCPU *cpu = POWERPC_CPU(cs);
+    CPUPPCState *env = &cpu->env;
+    int r = ppc_gdb_register_len_apple(n);
+
+    if (!r) {
+        return r;
+    }
+    maybe_bswap_register(env, mem_buf, r);
+    if (n < 32) {
+        /* gprs */
+        env->gpr[n] = ldq_p(mem_buf);
+    } else if (n < 64) {
+        /* fprs */
+        env->fpr[n-32] = ldfq_p(mem_buf);
+    } else {
+        switch (n) {
+        case 64 + 32:
+            env->nip = ldq_p(mem_buf);
+            break;
+        case 65 + 32:
+            ppc_store_msr(env, ldq_p(mem_buf));
+            break;
+        case 66 + 32:
+            {
+                uint32_t cr = ldl_p(mem_buf);
+                int i;
+                for (i = 0; i < 8; i++) {
+                    env->crf[i] = (cr >> (32 - ((i + 1) * 4))) & 0xF;
+                }
+                break;
+            }
+        case 67 + 32:
+            env->lr = ldq_p(mem_buf);
+            break;
+        case 68 + 32:
+            env->ctr = ldq_p(mem_buf);
+            break;
+        case 69 + 32:
+            env->xer = ldq_p(mem_buf);
+            break;
+        case 70 + 32:
+            /* fpscr */
+            store_fpscr(env, ldq_p(mem_buf), 0xffffffff);
+            break;
+        }
+    }
+    return r;
+}