| 1 | /* Interface between the opcode library and its callers. |
| 2 | Written by Cygnus Support, 1993. |
| 3 | |
| 4 | The opcode library (libopcodes.a) provides instruction decoders for |
| 5 | a large variety of instruction sets, callable with an identical |
| 6 | interface, for making instruction-processing programs more independent |
| 7 | of the instruction set being processed. */ |
| 8 | |
| 9 | #include <stdio.h> |
| 10 | #include "bfd.h" |
| 11 | |
| 12 | typedef int (*fprintf_ftype) PARAMS((FILE*, const char*, ...)); |
| 13 | |
| 14 | |
| 15 | /* This struct is passed into the instruction decoding routine, |
| 16 | and is passed back out into each callback. The various fields are used |
| 17 | for conveying information from your main routine into your callbacks, |
| 18 | for passing information into the instruction decoders (such as the |
| 19 | addresses of the callback functions), or for passing information |
| 20 | back from the instruction decoders to their callers. |
| 21 | |
| 22 | It must be initialized before it is first passed; this can be done |
| 23 | by hand, or using one of the initialization macros below. */ |
| 24 | |
| 25 | typedef struct disassemble_info { |
| 26 | fprintf_ftype fprintf_func; |
| 27 | FILE *stream; |
| 28 | PTR application_data; |
| 29 | |
| 30 | /* For use by the disassembler. */ |
| 31 | int flags; |
| 32 | PTR private_data; |
| 33 | |
| 34 | /* Function used to get bytes to disassemble. MEMADDR is the |
| 35 | address of the stuff to be disassembled, MYADDR is the address to |
| 36 | put the bytes in, and LENGTH is the number of bytes to read. |
| 37 | INFO is a pointer to this struct. |
| 38 | Returns an errno value or 0 for success. */ |
| 39 | int (*read_memory_func) |
| 40 | PARAMS ((bfd_vma memaddr, bfd_byte *myaddr, int length, |
| 41 | struct disassemble_info *info)); |
| 42 | |
| 43 | /* Function which should be called if we get an error that we can't |
| 44 | recover from. STATUS is the errno value from read_memory_func and |
| 45 | MEMADDR is the address that we were trying to read. INFO is a |
| 46 | pointer to this struct. */ |
| 47 | void (*memory_error_func) |
| 48 | PARAMS ((int status, bfd_vma memaddr, struct disassemble_info *info)); |
| 49 | |
| 50 | /* Function called to print ADDR. */ |
| 51 | void (*print_address_func) |
| 52 | PARAMS ((bfd_vma addr, struct disassemble_info *info)); |
| 53 | |
| 54 | /* These are for buffer_read_memory. */ |
| 55 | bfd_byte *buffer; |
| 56 | bfd_vma buffer_vma; |
| 57 | int buffer_length; |
| 58 | |
| 59 | /* Results from instruction decoders. Not all decoders yet support |
| 60 | this information. This info is set each time an instruction is |
| 61 | decoded, and is only valid for the last such instruction. |
| 62 | |
| 63 | To determine whether this decoder supports this information, set |
| 64 | insn_info_valid to 0, decode an instruction, then check it. */ |
| 65 | |
| 66 | enum dis_insn_type { |
| 67 | dis_noninsn, /* Not a valid instruction */ |
| 68 | dis_nonbranch, /* Not a branch instruction */ |
| 69 | dis_branch, /* Unconditional branch */ |
| 70 | dis_condbranch, /* Conditional branch */ |
| 71 | dis_jsr, /* Jump to subroutine */ |
| 72 | dis_condjsr, /* Conditional jump to subroutine */ |
| 73 | dis_dref, /* Data reference instruction */ |
| 74 | dis_dref2, /* Two data references in instruction */ |
| 75 | }; |
| 76 | char insn_info_valid; /* Branch info has been set. */ |
| 77 | char branch_delay_insns; /* How many sequential insn's will run before |
| 78 | a branch takes effect. (0 = normal) */ |
| 79 | char data_size; /* Size of data reference in insn, in bytes */ |
| 80 | enum dis_insn_type insn_type; /* Type of instruction */ |
| 81 | bfd_vma target; /* Target address of branch or dref, if known; |
| 82 | zero if unknown. */ |
| 83 | bfd_vma target2; /* Second target address for dref2 */ |
| 84 | |
| 85 | } disassemble_info; |
| 86 | |
| 87 | |
| 88 | |
| 89 | |
| 90 | |
| 91 | \f |
| 92 | /* Standard disassemblers. Disassemble one instruction at the given |
| 93 | target address. Return number of bytes processed. */ |
| 94 | typedef int (*disassembler_ftype) |
| 95 | PARAMS((bfd_vma, disassemble_info *)); |
| 96 | |
| 97 | extern int print_insn_big_mips PARAMS ((bfd_vma, disassemble_info*)); |
| 98 | extern int print_insn_little_mips PARAMS ((bfd_vma, disassemble_info*)); |
| 99 | extern int print_insn_i386 PARAMS ((bfd_vma, disassemble_info*)); |
| 100 | extern int print_insn_m68k PARAMS ((bfd_vma, disassemble_info*)); |
| 101 | extern int print_insn_z8001 PARAMS ((bfd_vma, disassemble_info*)); |
| 102 | extern int print_insn_z8002 PARAMS ((bfd_vma, disassemble_info*)); |
| 103 | extern int print_insn_h8300 PARAMS ((bfd_vma, disassemble_info*)); |
| 104 | extern int print_insn_h8300h PARAMS ((bfd_vma, disassemble_info*)); |
| 105 | extern int print_insn_h8500 PARAMS ((bfd_vma, disassemble_info*)); |
| 106 | extern int print_insn_alpha PARAMS ((bfd_vma, disassemble_info*)); |
| 107 | extern int print_insn_sparc PARAMS ((bfd_vma, disassemble_info*)); |
| 108 | extern int print_insn_big_a29k PARAMS ((bfd_vma, disassemble_info*)); |
| 109 | extern int print_insn_little_a29k PARAMS ((bfd_vma, disassemble_info*)); |
| 110 | extern int print_insn_i960 PARAMS ((bfd_vma, disassemble_info*)); |
| 111 | extern int print_insn_sh PARAMS ((bfd_vma, disassemble_info*)); |
| 112 | extern int print_insn_hppa PARAMS ((bfd_vma, disassemble_info*)); |
| 113 | extern int print_insn_m88k PARAMS ((bfd_vma, disassemble_info*)); |
| 114 | |
| 115 | |
| 116 | |
| 117 | |
| 118 | |
| 119 | \f |
| 120 | /* This block of definitions is for particular callers who read instructions |
| 121 | into a buffer before calling the instruction decoder. */ |
| 122 | |
| 123 | /* Here is a function which callers may wish to use for read_memory_func. |
| 124 | It gets bytes from a buffer. */ |
| 125 | extern int buffer_read_memory |
| 126 | PARAMS ((bfd_vma, bfd_byte *, int, struct disassemble_info *)); |
| 127 | |
| 128 | /* This function goes with buffer_read_memory. |
| 129 | It prints a message using info->fprintf_func and info->stream. */ |
| 130 | extern void perror_memory PARAMS ((int, bfd_vma, struct disassemble_info *)); |
| 131 | |
| 132 | |
| 133 | /* Just print the address is hex. This is included for completeness even |
| 134 | though both GDB and objdump provide their own (to print symbolic |
| 135 | addresses). */ |
| 136 | extern void generic_print_address |
| 137 | PARAMS ((bfd_vma, struct disassemble_info *)); |
| 138 | |
| 139 | #define INIT_DISASSEMBLE_INFO(INFO, STREAM) \ |
| 140 | (INFO).fprintf_func = (fprintf_ftype)fprintf, \ |
| 141 | (INFO).stream = (STREAM), \ |
| 142 | (INFO).buffer = NULL, \ |
| 143 | (INFO).buffer_vma = 0, \ |
| 144 | (INFO).buffer_length = 0, \ |
| 145 | (INFO).read_memory_func = buffer_read_memory, \ |
| 146 | (INFO).memory_error_func = perror_memory, \ |
| 147 | (INFO).print_address_func = generic_print_address, \ |
| 148 | (INFO).insn_info_valid = 0 |
| 149 | |
| 150 | |
| 151 | |
| 152 | \f |
| 153 | /* This block of definitions is for calling the instruction decoders |
| 154 | from GDB. */ |
| 155 | |
| 156 | /* GDB--Like target_read_memory, but slightly different parameters. */ |
| 157 | extern int |
| 158 | dis_asm_read_memory PARAMS ((bfd_vma memaddr, bfd_byte *myaddr, int len, |
| 159 | disassemble_info *info)); |
| 160 | |
| 161 | /* GDB--Like memory_error with slightly different parameters. */ |
| 162 | extern void |
| 163 | dis_asm_memory_error |
| 164 | PARAMS ((int status, bfd_vma memaddr, disassemble_info *info)); |
| 165 | |
| 166 | /* GDB--Like print_address with slightly different parameters. */ |
| 167 | extern void |
| 168 | dis_asm_print_address PARAMS ((bfd_vma addr, disassemble_info *info)); |
| 169 | |
| 170 | #define GDB_INIT_DISASSEMBLE_INFO(INFO, STREAM) \ |
| 171 | (INFO).fprintf_func = (fprintf_ftype)fprintf_filtered, \ |
| 172 | (INFO).stream = (STREAM), \ |
| 173 | (INFO).read_memory_func = dis_asm_read_memory, \ |
| 174 | (INFO).memory_error_func = dis_asm_memory_error, \ |
| 175 | (INFO).print_address_func = dis_asm_print_address, \ |
| 176 | (INFO).insn_info_valid = 0 |