1 /* Interface between the opcode library and its callers.
2 Written by Cygnus Support, 1993.
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. */
15 typedef int (*fprintf_ftype) PARAMS((FILE*, const char*, ...));
18 dis_noninsn, /* Not a valid instruction */
19 dis_nonbranch, /* Not a branch instruction */
20 dis_branch, /* Unconditional branch */
21 dis_condbranch, /* Conditional branch */
22 dis_jsr, /* Jump to subroutine */
23 dis_condjsr, /* Conditional jump to subroutine */
24 dis_dref, /* Data reference instruction */
25 dis_dref2 /* Two data references in instruction */
28 /* This struct is passed into the instruction decoding routine,
29 and is passed back out into each callback. The various fields are used
30 for conveying information from your main routine into your callbacks,
31 for passing information into the instruction decoders (such as the
32 addresses of the callback functions), or for passing information
33 back from the instruction decoders to their callers.
35 It must be initialized before it is first passed; this can be done
36 by hand, or using one of the initialization macros below. */
38 typedef struct disassemble_info {
39 fprintf_ftype fprintf_func;
43 /* Target description. We could replace this with a pointer to the bfd,
44 but that would require one. There currently isn't any such requirement
45 so to avoid introducing one we record these explicitly. */
46 /* The bfd_flavour. This can be bfd_target_unknown_flavour. */
47 enum bfd_flavour flavour;
48 /* The bfd_arch value. */
49 enum bfd_architecture arch;
50 /* The bfd_mach value. */
52 /* Endianness (for bi-endian cpus). Mono-endian cpus can ignore this. */
53 enum bfd_endian endian;
54 /* The symbol at the start of the function being disassembled. This
55 is not set reliably, but if it is not NULL, it is correct. */
58 /* For use by the disassembler.
59 The top 16 bits are reserved for public use (and are documented here).
60 The bottom 16 bits are for the internal use of the disassembler. */
62 #define INSN_HAS_RELOC 0x80000000
65 /* Function used to get bytes to disassemble. MEMADDR is the
66 address of the stuff to be disassembled, MYADDR is the address to
67 put the bytes in, and LENGTH is the number of bytes to read.
68 INFO is a pointer to this struct.
69 Returns an errno value or 0 for success. */
70 int (*read_memory_func)
71 PARAMS ((bfd_vma memaddr, bfd_byte *myaddr, int length,
72 struct disassemble_info *info));
74 /* Function which should be called if we get an error that we can't
75 recover from. STATUS is the errno value from read_memory_func and
76 MEMADDR is the address that we were trying to read. INFO is a
77 pointer to this struct. */
78 void (*memory_error_func)
79 PARAMS ((int status, bfd_vma memaddr, struct disassemble_info *info));
81 /* Function called to print ADDR. */
82 void (*print_address_func)
83 PARAMS ((bfd_vma addr, struct disassemble_info *info));
85 /* Function called to determine if there is a symbol at the given ADDR.
86 If there is, the function returns 1, otherwise it returns 0.
87 This is used by ports which support an overlay manager where
88 the overlay number is held in the top part of an address. In
89 some circumstances we want to include the overlay number in the
90 address, (normally because there is a symbol associated with
91 that address), but sometimes we want to mask out the overlay bits. */
92 int (* symbol_at_address_func)
93 PARAMS ((bfd_vma addr, struct disassemble_info * info));
95 /* These are for buffer_read_memory. */
100 /* This variable may be set by the instruction decoder. It suggests
101 the number of bytes objdump should display on a single line. If
102 the instruction decoder sets this, it should always set it to
103 the same value in order to get reasonable looking output. */
106 /* the next two variables control the way objdump displays the raw data */
107 /* For example, if bytes_per_line is 8 and bytes_per_chunk is 4, the */
108 /* output will look like this:
109 00: 00000000 00000000
110 with the chunks displayed according to "display_endian". */
112 enum bfd_endian display_endian;
114 /* Results from instruction decoders. Not all decoders yet support
115 this information. This info is set each time an instruction is
116 decoded, and is only valid for the last such instruction.
118 To determine whether this decoder supports this information, set
119 insn_info_valid to 0, decode an instruction, then check it. */
121 char insn_info_valid; /* Branch info has been set. */
122 char branch_delay_insns; /* How many sequential insn's will run before
123 a branch takes effect. (0 = normal) */
124 char data_size; /* Size of data reference in insn, in bytes */
125 enum dis_insn_type insn_type; /* Type of instruction */
126 bfd_vma target; /* Target address of branch or dref, if known;
128 bfd_vma target2; /* Second target address for dref2 */
133 /* Standard disassemblers. Disassemble one instruction at the given
134 target address. Return number of bytes processed. */
135 typedef int (*disassembler_ftype)
136 PARAMS((bfd_vma, disassemble_info *));
138 extern int print_insn_big_mips PARAMS ((bfd_vma, disassemble_info*));
139 extern int print_insn_little_mips PARAMS ((bfd_vma, disassemble_info*));
140 extern int print_insn_i386 PARAMS ((bfd_vma, disassemble_info*));
141 extern int print_insn_m68k PARAMS ((bfd_vma, disassemble_info*));
142 extern int print_insn_z8001 PARAMS ((bfd_vma, disassemble_info*));
143 extern int print_insn_z8002 PARAMS ((bfd_vma, disassemble_info*));
144 extern int print_insn_h8300 PARAMS ((bfd_vma, disassemble_info*));
145 extern int print_insn_h8300h PARAMS ((bfd_vma, disassemble_info*));
146 extern int print_insn_h8300s PARAMS ((bfd_vma, disassemble_info*));
147 extern int print_insn_h8500 PARAMS ((bfd_vma, disassemble_info*));
148 extern int print_insn_alpha PARAMS ((bfd_vma, disassemble_info*));
149 extern disassembler_ftype arc_get_disassembler PARAMS ((int, int));
150 extern int print_insn_big_arm PARAMS ((bfd_vma, disassemble_info*));
151 extern int print_insn_little_arm PARAMS ((bfd_vma, disassemble_info*));
152 extern int print_insn_sparc PARAMS ((bfd_vma, disassemble_info*));
153 extern int print_insn_big_a29k PARAMS ((bfd_vma, disassemble_info*));
154 extern int print_insn_little_a29k PARAMS ((bfd_vma, disassemble_info*));
155 extern int print_insn_i960 PARAMS ((bfd_vma, disassemble_info*));
156 extern int print_insn_sh PARAMS ((bfd_vma, disassemble_info*));
157 extern int print_insn_shl PARAMS ((bfd_vma, disassemble_info*));
158 extern int print_insn_hppa PARAMS ((bfd_vma, disassemble_info*));
159 extern int print_insn_m32r PARAMS ((bfd_vma, disassemble_info*));
160 extern int print_insn_m88k PARAMS ((bfd_vma, disassemble_info*));
161 extern int print_insn_mn10200 PARAMS ((bfd_vma, disassemble_info*));
162 extern int print_insn_mn10300 PARAMS ((bfd_vma, disassemble_info*));
163 extern int print_insn_ns32k PARAMS ((bfd_vma, disassemble_info*));
164 extern int print_insn_big_powerpc PARAMS ((bfd_vma, disassemble_info*));
165 extern int print_insn_little_powerpc PARAMS ((bfd_vma, disassemble_info*));
166 extern int print_insn_rs6000 PARAMS ((bfd_vma, disassemble_info*));
167 extern int print_insn_w65 PARAMS ((bfd_vma, disassemble_info*));
168 extern int print_insn_d10v PARAMS ((bfd_vma, disassemble_info*));
169 /* start-sanitize-d30v */
170 extern int print_insn_d30v PARAMS ((bfd_vma, disassemble_info*));
171 /* end-sanitize-d30v */
172 extern int print_insn_v850 PARAMS ((bfd_vma, disassemble_info*));
173 /* start-sanitize-tic80 */
174 extern int print_insn_tic80 PARAMS ((bfd_vma, disassemble_info*));
175 /* end-sanitize-tic80 */
176 /* start-sanitize-sky */
177 extern int print_insn_dvp PARAMS ((bfd_vma, disassemble_info*));
178 extern int dvp_insn_p PARAMS ((disassemble_info*));
179 /* end-sanitize-sky */
181 /* Fetch the disassembler for a given BFD, if that support is available. */
182 extern disassembler_ftype disassembler PARAMS ((bfd *));
185 /* This block of definitions is for particular callers who read instructions
186 into a buffer before calling the instruction decoder. */
188 /* Here is a function which callers may wish to use for read_memory_func.
189 It gets bytes from a buffer. */
190 extern int buffer_read_memory
191 PARAMS ((bfd_vma, bfd_byte *, int, struct disassemble_info *));
193 /* This function goes with buffer_read_memory.
194 It prints a message using info->fprintf_func and info->stream. */
195 extern void perror_memory PARAMS ((int, bfd_vma, struct disassemble_info *));
198 /* Just print the address in hex. This is included for completeness even
199 though both GDB and objdump provide their own (to print symbolic
201 extern void generic_print_address
202 PARAMS ((bfd_vma, struct disassemble_info *));
205 extern int generic_symbol_at_address
206 PARAMS ((bfd_vma, struct disassemble_info *));
208 /* Macro to initialize a disassemble_info struct. This should be called
209 by all applications creating such a struct. */
210 #define INIT_DISASSEMBLE_INFO(INFO, STREAM, FPRINTF_FUNC) \
211 (INFO).flavour = bfd_target_unknown_flavour, \
212 (INFO).arch = bfd_arch_unknown, \
214 (INFO).endian = BFD_ENDIAN_UNKNOWN, \
215 INIT_DISASSEMBLE_INFO_NO_ARCH(INFO, STREAM, FPRINTF_FUNC)
217 /* Call this macro to initialize only the internal variables for the
218 disassembler. Architecture dependent things such as byte order, or machine
219 variant are not touched by this macro. This makes things much easier for
220 GDB which must initialize these things seperatly. */
222 #define INIT_DISASSEMBLE_INFO_NO_ARCH(INFO, STREAM, FPRINTF_FUNC) \
223 (INFO).fprintf_func = (FPRINTF_FUNC), \
224 (INFO).stream = (STREAM), \
225 (INFO).symbol = NULL, \
226 (INFO).buffer = NULL, \
227 (INFO).buffer_vma = 0, \
228 (INFO).buffer_length = 0, \
229 (INFO).read_memory_func = buffer_read_memory, \
230 (INFO).memory_error_func = perror_memory, \
231 (INFO).print_address_func = generic_print_address, \
232 (INFO).symbol_at_address_func = generic_symbol_at_address, \
234 (INFO).bytes_per_line = 0, \
235 (INFO).bytes_per_chunk = 0, \
236 (INFO).display_endian = BFD_ENDIAN_UNKNOWN, \
237 (INFO).insn_info_valid = 0
239 #endif /* ! defined (DIS_ASM_H) */