Imported Upstream version 1.1.50-2012.08upstream/1.1.50-2012.08

1 files changed, 472 insertions, 0 deletions

diff --git a/disas.c b/disas.c
new file mode 100644
index 0000000..7b2acc9
--- /dev/null
+++ b/disas.c
@@ -0,0 +1,472 @@
+/* General "disassemble this chunk" code.  Used for debugging. */
+#include "config.h"
+#include "dis-asm.h"
+#include "elf.h"
+#include <errno.h>
+
+#include "cpu.h"
+#include "disas.h"
+
+/* Filled in by elfload.c.  Simplistic, but will do for now. */
+struct syminfo *syminfos = NULL;
+
+/* Get LENGTH bytes from info's buffer, at target address memaddr.
+   Transfer them to myaddr.  */
+int
+buffer_read_memory(bfd_vma memaddr, bfd_byte *myaddr, int length,
+                   struct disassemble_info *info)
+{
+    if (memaddr < info->buffer_vma
+        || memaddr + length > info->buffer_vma + info->buffer_length)
+        /* Out of bounds.  Use EIO because GDB uses it.  */
+        return EIO;
+    memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length);
+    return 0;
+}
+
+/* Get LENGTH bytes from info's buffer, at target address memaddr.
+   Transfer them to myaddr.  */
+static int
+target_read_memory (bfd_vma memaddr,
+                    bfd_byte *myaddr,
+                    int length,
+                    struct disassemble_info *info)
+{
+    cpu_memory_rw_debug(cpu_single_env, memaddr, myaddr, length, 0);
+    return 0;
+}
+
+/* Print an error message.  We can assume that this is in response to
+   an error return from buffer_read_memory.  */
+void
+perror_memory (int status, bfd_vma memaddr, struct disassemble_info *info)
+{
+  if (status != EIO)
+    /* Can't happen.  */
+    (*info->fprintf_func) (info->stream, "Unknown error %d\n", status);
+  else
+    /* Actually, address between memaddr and memaddr + len was
+       out of bounds.  */
+    (*info->fprintf_func) (info->stream,
+			   "Address 0x%" PRIx64 " is out of bounds.\n", memaddr);
+}
+
+/* This could be in a separate file, to save minuscule amounts of space
+   in statically linked executables.  */
+
+/* Just print the address is hex.  This is included for completeness even
+   though both GDB and objdump provide their own (to print symbolic
+   addresses).  */
+
+void
+generic_print_address (bfd_vma addr, struct disassemble_info *info)
+{
+    (*info->fprintf_func) (info->stream, "0x%" PRIx64, addr);
+}
+
+/* Print address in hex, truncated to the width of a target virtual address. */
+static void
+generic_print_target_address(bfd_vma addr, struct disassemble_info *info)
+{
+    uint64_t mask = ~0ULL >> (64 - TARGET_VIRT_ADDR_SPACE_BITS);
+    generic_print_address(addr & mask, info);
+}
+
+/* Print address in hex, truncated to the width of a host virtual address. */
+static void
+generic_print_host_address(bfd_vma addr, struct disassemble_info *info)
+{
+    uint64_t mask = ~0ULL >> (64 - (sizeof(void *) * 8));
+    generic_print_address(addr & mask, info);
+}
+
+/* Just return the given address.  */
+
+int
+generic_symbol_at_address (bfd_vma addr, struct disassemble_info *info)
+{
+  return 1;
+}
+
+bfd_vma bfd_getl64 (const bfd_byte *addr)
+{
+  unsigned long long v;
+
+  v = (unsigned long long) addr[0];
+  v |= (unsigned long long) addr[1] << 8;
+  v |= (unsigned long long) addr[2] << 16;
+  v |= (unsigned long long) addr[3] << 24;
+  v |= (unsigned long long) addr[4] << 32;
+  v |= (unsigned long long) addr[5] << 40;
+  v |= (unsigned long long) addr[6] << 48;
+  v |= (unsigned long long) addr[7] << 56;
+  return (bfd_vma) v;
+}
+
+bfd_vma bfd_getl32 (const bfd_byte *addr)
+{
+  unsigned long v;
+
+  v = (unsigned long) addr[0];
+  v |= (unsigned long) addr[1] << 8;
+  v |= (unsigned long) addr[2] << 16;
+  v |= (unsigned long) addr[3] << 24;
+  return (bfd_vma) v;
+}
+
+bfd_vma bfd_getb32 (const bfd_byte *addr)
+{
+  unsigned long v;
+
+  v = (unsigned long) addr[0] << 24;
+  v |= (unsigned long) addr[1] << 16;
+  v |= (unsigned long) addr[2] << 8;
+  v |= (unsigned long) addr[3];
+  return (bfd_vma) v;
+}
+
+bfd_vma bfd_getl16 (const bfd_byte *addr)
+{
+  unsigned long v;
+
+  v = (unsigned long) addr[0];
+  v |= (unsigned long) addr[1] << 8;
+  return (bfd_vma) v;
+}
+
+bfd_vma bfd_getb16 (const bfd_byte *addr)
+{
+  unsigned long v;
+
+  v = (unsigned long) addr[0] << 24;
+  v |= (unsigned long) addr[1] << 16;
+  return (bfd_vma) v;
+}
+
+#ifdef TARGET_ARM
+static int
+print_insn_thumb1(bfd_vma pc, disassemble_info *info)
+{
+  return print_insn_arm(pc | 1, info);
+}
+#endif
+
+/* Disassemble this for me please... (debugging). 'flags' has the following
+   values:
+    i386 - 1 means 16 bit code, 2 means 64 bit code
+    arm  - bit 0 = thumb, bit 1 = reverse endian
+    ppc  - nonzero means little endian
+    other targets - unused
+ */
+void target_disas(FILE *out, target_ulong code, target_ulong size, int flags)
+{
+    target_ulong pc;
+    int count;
+    struct disassemble_info disasm_info;
+    int (*print_insn)(bfd_vma pc, disassemble_info *info);
+
+    INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
+
+    disasm_info.read_memory_func = target_read_memory;
+    disasm_info.buffer_vma = code;
+    disasm_info.buffer_length = size;
+    disasm_info.print_address_func = generic_print_target_address;
+
+#ifdef TARGET_WORDS_BIGENDIAN
+    disasm_info.endian = BFD_ENDIAN_BIG;
+#else
+    disasm_info.endian = BFD_ENDIAN_LITTLE;
+#endif
+#if defined(TARGET_I386)
+    if (flags == 2)
+        disasm_info.mach = bfd_mach_x86_64;
+    else if (flags == 1)
+        disasm_info.mach = bfd_mach_i386_i8086;
+    else
+        disasm_info.mach = bfd_mach_i386_i386;
+    print_insn = print_insn_i386;
+#elif defined(TARGET_ARM)
+    if (flags & 1) {
+        print_insn = print_insn_thumb1;
+    } else {
+        print_insn = print_insn_arm;
+    }
+    if (flags & 2) {
+#ifdef TARGET_WORDS_BIGENDIAN
+        disasm_info.endian = BFD_ENDIAN_LITTLE;
+#else
+        disasm_info.endian = BFD_ENDIAN_BIG;
+#endif
+    }
+#elif defined(TARGET_SPARC)
+    print_insn = print_insn_sparc;
+#ifdef TARGET_SPARC64
+    disasm_info.mach = bfd_mach_sparc_v9b;
+#endif
+#elif defined(TARGET_PPC)
+    if (flags >> 16)
+        disasm_info.endian = BFD_ENDIAN_LITTLE;
+    if (flags & 0xFFFF) {
+        /* If we have a precise definitions of the instructions set, use it */
+        disasm_info.mach = flags & 0xFFFF;
+    } else {
+#ifdef TARGET_PPC64
+        disasm_info.mach = bfd_mach_ppc64;
+#else
+        disasm_info.mach = bfd_mach_ppc;
+#endif
+    }
+    print_insn = print_insn_ppc;
+#elif defined(TARGET_M68K)
+    print_insn = print_insn_m68k;
+#elif defined(TARGET_MIPS)
+#ifdef TARGET_WORDS_BIGENDIAN
+    print_insn = print_insn_big_mips;
+#else
+    print_insn = print_insn_little_mips;
+#endif
+#elif defined(TARGET_SH4)
+    disasm_info.mach = bfd_mach_sh4;
+    print_insn = print_insn_sh;
+#elif defined(TARGET_ALPHA)
+    disasm_info.mach = bfd_mach_alpha_ev6;
+    print_insn = print_insn_alpha;
+#elif defined(TARGET_CRIS)
+    if (flags != 32) {
+        disasm_info.mach = bfd_mach_cris_v0_v10;
+        print_insn = print_insn_crisv10;
+    } else {
+        disasm_info.mach = bfd_mach_cris_v32;
+        print_insn = print_insn_crisv32;
+    }
+#elif defined(TARGET_S390X)
+    disasm_info.mach = bfd_mach_s390_64;
+    print_insn = print_insn_s390;
+#elif defined(TARGET_MICROBLAZE)
+    disasm_info.mach = bfd_arch_microblaze;
+    print_insn = print_insn_microblaze;
+#elif defined(TARGET_LM32)
+    disasm_info.mach = bfd_mach_lm32;
+    print_insn = print_insn_lm32;
+#else
+    fprintf(out, "0x" TARGET_FMT_lx
+	    ": Asm output not supported on this arch\n", code);
+    return;
+#endif
+
+    for (pc = code; size > 0; pc += count, size -= count) {
+	fprintf(out, "0x" TARGET_FMT_lx ":  ", pc);
+	count = print_insn(pc, &disasm_info);
+#if 0
+        {
+            int i;
+            uint8_t b;
+            fprintf(out, " {");
+            for(i = 0; i < count; i++) {
+                target_read_memory(pc + i, &b, 1, &disasm_info);
+                fprintf(out, " %02x", b);
+            }
+            fprintf(out, " }");
+        }
+#endif
+	fprintf(out, "\n");
+	if (count < 0)
+	    break;
+        if (size < count) {
+            fprintf(out,
+                    "Disassembler disagrees with translator over instruction "
+                    "decoding\n"
+                    "Please report this to qemu-devel@nongnu.org\n");
+            break;
+        }
+    }
+}
+
+/* Disassemble this for me please... (debugging). */
+void disas(FILE *out, void *code, unsigned long size)
+{
+    uintptr_t pc;
+    int count;
+    struct disassemble_info disasm_info;
+    int (*print_insn)(bfd_vma pc, disassemble_info *info);
+
+    INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
+    disasm_info.print_address_func = generic_print_host_address;
+
+    disasm_info.buffer = code;
+    disasm_info.buffer_vma = (uintptr_t)code;
+    disasm_info.buffer_length = size;
+
+#ifdef HOST_WORDS_BIGENDIAN
+    disasm_info.endian = BFD_ENDIAN_BIG;
+#else
+    disasm_info.endian = BFD_ENDIAN_LITTLE;
+#endif
+#if defined(CONFIG_TCG_INTERPRETER)
+    print_insn = print_insn_tci;
+#elif defined(__i386__)
+    disasm_info.mach = bfd_mach_i386_i386;
+    print_insn = print_insn_i386;
+#elif defined(__x86_64__)
+    disasm_info.mach = bfd_mach_x86_64;
+    print_insn = print_insn_i386;
+#elif defined(_ARCH_PPC)
+    print_insn = print_insn_ppc;
+#elif defined(__alpha__)
+    print_insn = print_insn_alpha;
+#elif defined(__sparc__)
+    print_insn = print_insn_sparc;
+#if defined(__sparc_v8plus__) || defined(__sparc_v8plusa__) || defined(__sparc_v9__)
+    disasm_info.mach = bfd_mach_sparc_v9b;
+#endif
+#elif defined(__arm__)
+    print_insn = print_insn_arm;
+#elif defined(__MIPSEB__)
+    print_insn = print_insn_big_mips;
+#elif defined(__MIPSEL__)
+    print_insn = print_insn_little_mips;
+#elif defined(__m68k__)
+    print_insn = print_insn_m68k;
+#elif defined(__s390__)
+    print_insn = print_insn_s390;
+#elif defined(__hppa__)
+    print_insn = print_insn_hppa;
+#elif defined(__ia64__)
+    print_insn = print_insn_ia64;
+#else
+    fprintf(out, "0x%lx: Asm output not supported on this arch\n",
+	    (long) code);
+    return;
+#endif
+    for (pc = (uintptr_t)code; size > 0; pc += count, size -= count) {
+        fprintf(out, "0x%08" PRIxPTR ":  ", pc);
+	count = print_insn(pc, &disasm_info);
+	fprintf(out, "\n");
+	if (count < 0)
+	    break;
+    }
+}
+
+/* Look up symbol for debugging purpose.  Returns "" if unknown. */
+const char *lookup_symbol(target_ulong orig_addr)
+{
+    const char *symbol = "";
+    struct syminfo *s;
+
+    for (s = syminfos; s; s = s->next) {
+        symbol = s->lookup_symbol(s, orig_addr);
+        if (symbol[0] != '\0') {
+            break;
+        }
+    }
+
+    return symbol;
+}
+
+#if !defined(CONFIG_USER_ONLY)
+
+#include "monitor.h"
+
+static int monitor_disas_is_physical;
+static CPUArchState *monitor_disas_env;
+
+static int
+monitor_read_memory (bfd_vma memaddr, bfd_byte *myaddr, int length,
+                     struct disassemble_info *info)
+{
+    if (monitor_disas_is_physical) {
+        cpu_physical_memory_read(memaddr, myaddr, length);
+    } else {
+        cpu_memory_rw_debug(monitor_disas_env, memaddr,myaddr, length, 0);
+    }
+    return 0;
+}
+
+static int GCC_FMT_ATTR(2, 3)
+monitor_fprintf(FILE *stream, const char *fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+    monitor_vprintf((Monitor *)stream, fmt, ap);
+    va_end(ap);
+    return 0;
+}
+
+void monitor_disas(Monitor *mon, CPUArchState *env,
+                   target_ulong pc, int nb_insn, int is_physical, int flags)
+{
+    int count, i;
+    struct disassemble_info disasm_info;
+    int (*print_insn)(bfd_vma pc, disassemble_info *info);
+
+    INIT_DISASSEMBLE_INFO(disasm_info, (FILE *)mon, monitor_fprintf);
+
+    monitor_disas_env = env;
+    monitor_disas_is_physical = is_physical;
+    disasm_info.read_memory_func = monitor_read_memory;
+    disasm_info.print_address_func = generic_print_target_address;
+
+    disasm_info.buffer_vma = pc;
+
+#ifdef TARGET_WORDS_BIGENDIAN
+    disasm_info.endian = BFD_ENDIAN_BIG;
+#else
+    disasm_info.endian = BFD_ENDIAN_LITTLE;
+#endif
+#if defined(TARGET_I386)
+    if (flags == 2)
+        disasm_info.mach = bfd_mach_x86_64;
+    else if (flags == 1)
+        disasm_info.mach = bfd_mach_i386_i8086;
+    else
+        disasm_info.mach = bfd_mach_i386_i386;
+    print_insn = print_insn_i386;
+#elif defined(TARGET_ARM)
+    print_insn = print_insn_arm;
+#elif defined(TARGET_ALPHA)
+    print_insn = print_insn_alpha;
+#elif defined(TARGET_SPARC)
+    print_insn = print_insn_sparc;
+#ifdef TARGET_SPARC64
+    disasm_info.mach = bfd_mach_sparc_v9b;
+#endif
+#elif defined(TARGET_PPC)
+#ifdef TARGET_PPC64
+    disasm_info.mach = bfd_mach_ppc64;
+#else
+    disasm_info.mach = bfd_mach_ppc;
+#endif
+    print_insn = print_insn_ppc;
+#elif defined(TARGET_M68K)
+    print_insn = print_insn_m68k;
+#elif defined(TARGET_MIPS)
+#ifdef TARGET_WORDS_BIGENDIAN
+    print_insn = print_insn_big_mips;
+#else
+    print_insn = print_insn_little_mips;
+#endif
+#elif defined(TARGET_SH4)
+    disasm_info.mach = bfd_mach_sh4;
+    print_insn = print_insn_sh;
+#elif defined(TARGET_S390X)
+    disasm_info.mach = bfd_mach_s390_64;
+    print_insn = print_insn_s390;
+#elif defined(TARGET_LM32)
+    disasm_info.mach = bfd_mach_lm32;
+    print_insn = print_insn_lm32;
+#else
+    monitor_printf(mon, "0x" TARGET_FMT_lx
+                   ": Asm output not supported on this arch\n", pc);
+    return;
+#endif
+
+    for(i = 0; i < nb_insn; i++) {
+	monitor_printf(mon, "0x" TARGET_FMT_lx ":  ", pc);
+	count = print_insn(pc, &disasm_info);
+	monitor_printf(mon, "\n");
+	if (count < 0)
+	    break;
+        pc += count;
+    }
+}
+#endif