external/qemu 0.8.2

1 files changed, 413 insertions, 0 deletions

diff --git a/disas.c b/disas.c
new file mode 100644
index 0000000..fd91b92
--- /dev/null
+++ b/disas.c
@@ -0,0 +1,413 @@
+/* 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 "exec-all.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 (memaddr, myaddr, length, info)
+     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)
+{
+    int i;
+    for(i = 0; i < length; i++) {
+        myaddr[i] = ldub_code(memaddr + i);
+    }
+    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 (status, memaddr, info)
+     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 miniscule 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 (addr, info)
+     bfd_vma addr;
+     struct disassemble_info *info;
+{
+    (*info->fprintf_func) (info->stream, "0x%" PRIx64, addr);
+}
+
+/* Just return the given address.  */
+
+int
+generic_symbol_at_address (addr, info)
+     bfd_vma addr;
+     struct disassemble_info * info;
+{
+  return 1;
+}
+
+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 teh following
+   values:
+    i386 - nonzero means 16 bit code
+    arm  - nonzero means thumb code 
+    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;
+
+#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)
+	print_insn = print_insn_thumb1;
+    else
+	print_insn = print_insn_arm;
+#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)
+        disasm_info.endian = BFD_ENDIAN_LITTLE;
+#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_MIPS)
+#ifdef TARGET_WORDS_BIGENDIAN
+    print_insn = print_insn_big_mips;
+#else
+    print_insn = print_insn_little_mips;
+#endif
+#elif defined(TARGET_M68K)
+    print_insn = print_insn_m68k;
+#elif defined(TARGET_SH4)
+    disasm_info.mach = bfd_mach_sh4;
+    print_insn = print_insn_sh;
+#else
+    fprintf(out, "0x" TARGET_FMT_lx
+	    ": Asm output not supported on this arch\n", code);
+    return;
+#endif
+
+    for (pc = code; pc < code + size; pc += 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;
+    }
+}
+
+/* Disassemble this for me please... (debugging). */
+void disas(FILE *out, void *code, unsigned long size)
+{
+    unsigned long 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.buffer = code;
+    disasm_info.buffer_vma = (unsigned long)code;
+    disasm_info.buffer_length = size;
+
+#ifdef WORDS_BIGENDIAN
+    disasm_info.endian = BFD_ENDIAN_BIG;
+#else
+    disasm_info.endian = BFD_ENDIAN_LITTLE;
+#endif
+#if 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(__powerpc__)
+    print_insn = print_insn_ppc;
+#elif defined(__alpha__)
+    print_insn = print_insn_alpha;
+#elif defined(__sparc__)
+    print_insn = print_insn_sparc;
+#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;
+#else
+    fprintf(out, "0x%lx: Asm output not supported on this arch\n",
+	    (long) code);
+    return;
+#endif
+    for (pc = (unsigned long)code; pc < (unsigned long)code + size; pc += count) {
+	fprintf(out, "0x%08lx:  ", pc);
+#ifdef __arm__
+        /* since data are included in the code, it is better to
+           display code data too */
+        if (is_host) {
+            fprintf(out, "%08x  ", (int)bfd_getl32((const bfd_byte *)pc));
+        }
+#endif
+	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)
+{
+    unsigned int i;
+    /* Hack, because we know this is x86. */
+    Elf32_Sym *sym;
+    struct syminfo *s;
+    target_ulong addr;
+    
+    for (s = syminfos; s; s = s->next) {
+	sym = s->disas_symtab;
+	for (i = 0; i < s->disas_num_syms; i++) {
+	    if (sym[i].st_shndx == SHN_UNDEF
+		|| sym[i].st_shndx >= SHN_LORESERVE)
+		continue;
+
+	    if (ELF_ST_TYPE(sym[i].st_info) != STT_FUNC)
+		continue;
+
+	    addr = sym[i].st_value;
+#ifdef TARGET_ARM
+            /* The bottom address bit marks a Thumb symbol.  */
+            addr &= ~(target_ulong)1;
+#endif
+	    if (orig_addr >= addr
+		&& orig_addr < addr + sym[i].st_size)
+		return s->disas_strtab + sym[i].st_name;
+	}
+    }
+    return "";
+}
+
+#if !defined(CONFIG_USER_ONLY)
+
+void term_vprintf(const char *fmt, va_list ap);
+void term_printf(const char *fmt, ...);
+
+static int monitor_disas_is_physical;
+static CPUState *monitor_disas_env;
+
+static int
+monitor_read_memory (memaddr, myaddr, length, info)
+     bfd_vma memaddr;
+     bfd_byte *myaddr;
+     int length;
+     struct disassemble_info *info;
+{
+    if (monitor_disas_is_physical) {
+        cpu_physical_memory_rw(memaddr, myaddr, length, 0);
+    } else {
+        cpu_memory_rw_debug(monitor_disas_env, memaddr,myaddr, length, 0);
+    }
+    return 0;
+}
+
+static int monitor_fprintf(FILE *stream, const char *fmt, ...)
+{
+    va_list ap;
+    va_start(ap, fmt);
+    term_vprintf(fmt, ap);
+    va_end(ap);
+    return 0;
+}
+
+void monitor_disas(CPUState *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, NULL, monitor_fprintf);
+
+    monitor_disas_env = env;
+    monitor_disas_is_physical = is_physical;
+    disasm_info.read_memory_func = monitor_read_memory;
+
+    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_SPARC)
+    print_insn = print_insn_sparc;
+#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_MIPS)
+#ifdef TARGET_WORDS_BIGENDIAN
+    print_insn = print_insn_big_mips;
+#else
+    print_insn = print_insn_little_mips;
+#endif
+#elif defined(TARGET_M68K)
+    print_insn = print_insn_m68k;
+#else
+    term_printf("0x" TARGET_FMT_lx
+		": Asm output not supported on this arch\n", pc);
+    return;
+#endif
+
+    for(i = 0; i < nb_insn; i++) {
+	term_printf("0x" TARGET_FMT_lx ":  ", pc);
+	count = print_insn(pc, &disasm_info);
+	term_printf("\n");
+	if (count < 0)
+	    break;
+        pc += count;
+    }
+}
+#endif