provide a new interface (using read_memory_func) to call the disassemblers

which copes with errors in a plausible way

1 files changed, 66 insertions, 16 deletions

diff --git a/include/dis-asm.h b/include/dis-asm.h
index d229924..da13bf7 100644
--- a/include/dis-asm.h
+++ b/include/dis-asm.h
@@ -7,26 +7,76 @@ typedef int (*fprintf_ftype) PARAMS((FILE*, const char*, ...));
 typedef struct disassemble_info {
   fprintf_ftype fprintf_func;
   FILE *stream;
+
+  /* For use by the disassembler.  */
   int flags;
+  PTR private_data;
+
+  /* Function used to get bytes to disassemble.  MEMADDR is the
+     address of the stuff to be disassembled, MYADDR is the address to
+     put the bytes in, and LENGTH is the number of bytes to read.
+     INFO is a pointer to this struct.
+     Returns an errno value or 0 for success.  */
+  int (*read_memory_func)
+    PARAMS ((bfd_vma memaddr, bfd_byte *myaddr, int length,
+	     struct disassemble_info *info));
+
+  /* Function which should be called if we get an error that we can't
+     recover from.  STATUS is the errno value from read_memory_func and
+     MEMADDR is the address that we were trying to read.  INFO is a
+     pointer to this struct.  */
+  void (*memory_error_func)
+    PARAMS ((int status, bfd_vma memaddr, struct disassemble_info *info));
+
+  /* These are for buffer_read_memory.  */
+  bfd_byte *buffer;
+  bfd_vma buffer_vma;
+  int buffer_length;
 } disassemble_info;
 
-typedef int (*disassembler_ftype)
-     PARAMS((bfd_vma, bfd_byte *, disassemble_info *));
+/* Here is a function which callers may wish to use for read_memory_func.
+   It gets bytes from a buffer.  */
+extern int buffer_read_memory
+  PARAMS ((bfd_vma, bfd_byte *, int, struct disassemble_info *));
+
+/* This function goes with buffer_read_memory.
+   It prints a message using info->fprintf_func and info->stream.  */
+extern void perror_memory PARAMS ((int, bfd_vma, struct disassemble_info *));
 
 #define INIT_DISASSEMBLE_INFO(INFO, STREAM) \
-  INFO.fprintf_func = (fprintf_ftype)fprintf, \
-  INFO.stream = (STREAM)
+  (INFO).fprintf_func = (fprintf_ftype)fprintf, \
+  (INFO).stream = (STREAM), \
+  (INFO).buffer = NULL, \
+  (INFO).buffer_vma = 0, \
+  (INFO).buffer_length = 0, \
+  (INFO).read_memory_func = buffer_read_memory, \
+  (INFO).memory_error_func = perror_memory
+
+/* GDB--Like target_read_memory, but slightly different parameters.  */
+extern int
+dis_asm_read_memory PARAMS ((bfd_vma memaddr, bfd_byte *myaddr, int len));
+
+/* GDB--Like memory_error with slightly different parameters.  */
+extern void
+dis_asm_memory_error
+  PARAMS ((int status, bfd_vma memaddr, disassembler_info *info));
 
 #define GDB_INIT_DISASSEMBLE_INFO(INFO, STREAM) \
-  INFO.fprintf_func = (fprintf_ftype)fprintf_filtered, \
-  INFO.stream = (STREAM)
-
-/* Standard dis-assemblers. */
-
-extern int print_insn_big_mips PARAMS ((bfd_vma, bfd_byte*,disassemble_info*));
-extern int print_insn_little_mips
-  PARAMS ((bfd_vma,bfd_byte*,disassemble_info*));
-extern int print_insn_i386 PARAMS ((bfd_vma,bfd_byte*,disassemble_info*));
-extern int print_insn_m68k PARAMS ((bfd_vma,bfd_byte*,disassemble_info*));
-extern int print_insn_z8001 PARAMS ((bfd_vma,bfd_byte*,disassemble_info*));
-extern int print_insn_z8002 PARAMS ((bfd_vma,bfd_byte*,disassemble_info*));
+  (INFO).fprintf_func = (fprintf_ftype)fprintf_filtered, \
+  (INFO).stream = (STREAM), \
+  (INFO).read_memory_func = dis_asm_read_memory, \
+  (INFO).memory_error_func = dis_asm_memory_error
+
+
+/* Standard disassemblers.  Disassemble one instruction at the given
+   target address.  Return number of bytes processed.  */
+typedef int (*disassembler_ftype)
+     PARAMS((bfd_vma, disassemble_info *));
+
+extern int print_insn_big_mips PARAMS ((bfd_vma, disassemble_info*));
+extern int print_insn_little_mips PARAMS ((bfd_vma,disassemble_info*));
+extern int print_insn_i386 PARAMS ((bfd_vma,disassemble_info*));
+extern int print_insn_m68k PARAMS ((bfd_vma,disassemble_info*));
+extern int print_insn_z8001 PARAMS ((bfd_vma,disassemble_info*));
+extern int print_insn_z8002 PARAMS ((bfd_vma,disassemble_info*));
+extern int print_insn_h8500 PARAMS ((bfd_vma,disassemble_info*));