mirror/binutils-gdb
2
0
Fork 0
mirror of https://sourceware.org/git/binutils-gdb.git synced 2024-11-27 03:51:15 +08:00
Code Issues Packages Projects Releases Wiki Activity
78da84f994
binutils-gdb/include/dis-asm.h
Maciej W. Rozycki 471b9d1507 GDB PR tdep/8282: MIPS: Wire in `set disassembler-options' 
Implement MIPS target support for passing options to the disassembler,
complementing commit 65b48a8140 ("GDB: Add support for the new
set/show disassembler-options commands.").

This includes options that expect an argument, so adjust the generic
code and data structures used so as to handle such options.  So as to
give backends syntax flexibility no specific delimiter has been defined
to separate options from their respective arguments, so it has to be
included as the last character of the option name.  Completion code
however has not been adjusted and consequently option arguments cannot
be completed at this time.

Also the MIPS target has non-empty defaults for the options, so that ABI
names for the general-purpose registers respect our `set mips abi ...'
setting rather than always being determined from the ELF headers of the
binary file selected.  Handle these defaults as implicit options, never
shown to the user and always prepended to the user-specified options, so
that the latters can override the defaults.

The resulting output for the MIPS target is as follows:

(gdb) show disassembler-options
The current disassembler options are ''

The following disassembler options are supported for use with the
'set disassembler-options <option>[,<option>...]' command:

  no-aliases      Use canonical instruction forms.

  msa             Recognize MSA instructions.

  virt            Recognize the virtualization ASE instructions.

  xpa             Recognize the eXtended Physical Address (XPA) ASE
                  instructions.

  ginv            Recognize the Global INValidate (GINV) ASE instructions.

  gpr-names=ABI   Print GPR names according to specified ABI.
                  Default: based on binary being disassembled.

  fpr-names=ABI   Print FPR names according to specified ABI.
                  Default: numeric.

  cp0-names=ARCH  Print CP0 register names according to specified architecture.
                  Default: based on binary being disassembled.

  hwr-names=ARCH  Print HWR names according to specified architecture.
                  Default: based on binary being disassembled.

  reg-names=ABI   Print GPR and FPR names according to specified ABI.

  reg-names=ARCH  Print CP0 register and HWR names according to specified
                  architecture.

  For the options above, the following values are supported for "ABI":
    numeric 32 n32 64

  For the options above, the following values are supported for "ARCH":
    numeric r3000 r3900 r4000 r4010 vr4100 vr4111 vr4120 r4300 r4400 r4600
    r4650 r5000 vr5400 vr5500 r5900 r6000 rm7000 rm9000 r8000 r10000 r12000
    r14000 r16000 mips5 mips32 mips32r2 mips32r3 mips32r5 mips32r6 mips64
    mips64r2 mips64r3 mips64r5 mips64r6 interaptiv-mr2 sb1 loongson2e
    loongson2f loongson3a octeon octeon+ octeon2 octeon3 xlr xlp
(gdb)

which corresponds to what `objdump --help' used to print for the MIPS
target, with minor formatting changes, most notably option argument
lists being wrapped, but also the amount of white space separating
options from the respective descriptions.  The relevant part the new
code is now also used by `objdump --help', which means these formatting
changes apply to both outputs, except for argument list wrapping, which
is GDB-specific.

This also adds a separating new line between the heading and option
lists where descriptions are provided, hence:

(gdb) set architecture s390:31-bit
(gdb) show disassembler-options
The current disassembler options are ''

The following disassembler options are supported for use with the
'set disassembler-options <option>[,<option>...]' command:

  esa         Disassemble in ESA architecture mode
  zarch       Disassemble in z/Architecture mode
  insnlength  Print unknown instructions according to length from first two bits
(gdb)

but:

(gdb) set architecture powerpc:common
(gdb) show disassembler-options
The current disassembler options are ''

The following disassembler options are supported for use with the
'set disassembler-options <option>[,<option>...]' command:
  403, 405, 440, 464, 476, 601, 603, 604, 620, 7400, 7410, 7450, 7455, 750cl,
  821, 850, 860, a2, altivec, any, booke, booke32, cell, com, e200z4, e300,
  e500, e500mc, e500mc64, e5500, e6500, e500x2, efs, efs2, power4, power5,
  power6, power7, power8, power9, ppc, ppc32, 32, ppc64, 64, ppc64bridge,
  ppcps, pwr, pwr2, pwr4, pwr5, pwr5x, pwr6, pwr7, pwr8, pwr9, pwrx, raw, spe,
  spe2, titan, vle, vsx
(gdb)

Existing affected target backends have been adjusted accordingly.

This has been verified manually with:

(gdb) set architecture arm
(gdb) set architecture powerpc:common
(gdb) set architecture s390:31-bit

to cause no issues with the `show disassembler-options' and `set
disassembler-options' commands.  A test case for the MIPS target has
also been provided, covering the default settings with ABI overrides as
well as disassembler option overrides.

2018-07-02  Maciej W. Rozycki  <macro@mips.com>
            Simon Marchi  <simon.marchi@polymtl.ca>

	include/
	PR tdep/8282
	* dis-asm.h (disasm_option_arg_t): New typedef.
	(disasm_options_and_args_t): Likewise.
	(disasm_options_t): Add `arg' member, document members.
	(disassembler_options_mips): New prototype.
	(disassembler_options_arm, disassembler_options_powerpc)
	(disassembler_options_s390): Update prototypes.

	opcodes/
	PR tdep/8282
	* mips-dis.c (mips_option_arg_t): New enumeration.
	(mips_options): New variable.
	(disassembler_options_mips): New function.
	(print_mips_disassembler_options): Reimplement in terms of
	`disassembler_options_mips'.
	* arm-dis.c (disassembler_options_arm): Adapt to using the
	`disasm_options_and_args_t' structure.
	* ppc-dis.c (disassembler_options_powerpc): Likewise.
	* s390-dis.c (disassembler_options_s390): Likewise.

	gdb/
	PR tdep/8282
	* disasm.h (gdb_disassembler): Add
	`m_disassembler_options_holder'. member
	* disasm.c (get_all_disassembler_options): New function.
	(gdb_disassembler::gdb_disassembler): Use it.
	(gdb_buffered_insn_length_init_dis): Likewise.
	(gdb_buffered_insn_length): Adjust accordingly.
	(set_disassembler_options): Handle options with arguments.
	(show_disassembler_options_sfunc): Likewise.  Add a leading new
	line if showing options with descriptions.
	(disassembler_options_completer): Adapt to using the
	`disasm_options_and_args_t' structure.
	* mips-tdep.c (mips_disassembler_options): New variable.
	(mips_disassembler_options_o32): Likewise.
	(mips_disassembler_options_n32): Likewise.
	(mips_disassembler_options_n64): Likewise.
	(gdb_print_insn_mips): Don't set `disassembler_options'.
	(gdb_print_insn_mips_n32, gdb_print_insn_mips_n64): Remove
	functions.
	(mips_gdbarch_init): Always set `gdbarch_print_insn' to
	`gdb_print_insn_mips'.  Set `gdbarch_disassembler_options',
	`gdbarch_disassembler_options_implicit' and
	`gdbarch_valid_disassembler_options'.
	* arm-tdep.c (_initialize_arm_tdep): Adapt to using the
	`disasm_options_and_args_t' structure.
	* gdbarch.sh (disassembler_options_implicit): New `gdbarch'
	method.
	(valid_disassembler_options): Switch from `disasm_options_t' to
	the `disasm_options_and_args_t' structure.
	* NEWS: Document `set disassembler-options' support for the MIPS
	target.
	* gdbarch.h: Regenerate.
	* gdbarch.c: Regenerate.

	gdb/doc/
	PR tdep/8282
	* gdb.texinfo (Source and Machine Code): Document `set
	disassembler-options' support for the MIPS target.

	gdb/testsuite/
	PR tdep/8282
	* gdb.arch/mips-disassembler-options.exp: New test.
	* gdb.arch/mips-disassembler-options.s: New test source.
2018-07-02 23:57:21 +01:00

393 lines
16 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* Interface between the opcode library and its callers.
Copyright (C) 1999-2018 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA.
Written by Cygnus Support, 1993.
The opcode library (libopcodes.a) provides instruction decoders for
a large variety of instruction sets, callable with an identical
interface, for making instruction-processing programs more independent
of the instruction set being processed. */
#ifndef DIS_ASM_H
#define DIS_ASM_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdio.h>
#include "bfd.h"
typedef int (*fprintf_ftype) (void *, const char*, ...) ATTRIBUTE_FPTR_PRINTF_2;
enum dis_insn_type
{
dis_noninsn, /* Not a valid instruction. */
dis_nonbranch, /* Not a branch instruction. */
dis_branch, /* Unconditional branch. */
dis_condbranch, /* Conditional branch. */
dis_jsr, /* Jump to subroutine. */
dis_condjsr, /* Conditional jump to subroutine. */
dis_dref, /* Data reference instruction. */
dis_dref2 /* Two data references in instruction. */
};
/* This struct is passed into the instruction decoding routine,
and is passed back out into each callback. The various fields are used
for conveying information from your main routine into your callbacks,
for passing information into the instruction decoders (such as the
addresses of the callback functions), or for passing information
back from the instruction decoders to their callers.
It must be initialized before it is first passed; this can be done
by hand, or using one of the initialization macros below. */
typedef struct disassemble_info
{
fprintf_ftype fprintf_func;
void *stream;
void *application_data;
/* Target description. We could replace this with a pointer to the bfd,
but that would require one. There currently isn't any such requirement
so to avoid introducing one we record these explicitly. */
/* The bfd_flavour. This can be bfd_target_unknown_flavour. */
enum bfd_flavour flavour;
/* The bfd_arch value. */
enum bfd_architecture arch;
/* The bfd_mach value. */
unsigned long mach;
/* Endianness (for bi-endian cpus). Mono-endian cpus can ignore this. */
enum bfd_endian endian;
/* Endianness of code, for mixed-endian situations such as ARM BE8. */
enum bfd_endian endian_code;
/* An arch/mach-specific bitmask of selected instruction subsets, mainly
for processors with run-time-switchable instruction sets. The default,
zero, means that there is no constraint. CGEN-based opcodes ports
may use ISA_foo masks. */
void *insn_sets;
/* Some targets need information about the current section to accurately
display insns. If this is NULL, the target disassembler function
will have to make its best guess. */
asection *section;
/* An array of pointers to symbols either at the location being disassembled
or at the start of the function being disassembled. The array is sorted
so that the first symbol is intended to be the one used. The others are
present for any misc. purposes. This is not set reliably, but if it is
not NULL, it is correct. */
asymbol **symbols;
/* Number of symbols in array. */
int num_symbols;
/* Symbol table provided for targets that want to look at it. This is
used on Arm to find mapping symbols and determine Arm/Thumb code. */
asymbol **symtab;
int symtab_pos;
int symtab_size;
/* For use by the disassembler.
The top 16 bits are reserved for public use (and are documented here).
The bottom 16 bits are for the internal use of the disassembler. */
unsigned long flags;
/* Set if the disassembler has determined that there are one or more
relocations associated with the instruction being disassembled. */
#define INSN_HAS_RELOC (1 << 31)
/* Set if the user has requested the disassembly of data as well as code. */
#define DISASSEMBLE_DATA (1 << 30)
/* Set if the user has specifically set the machine type encoded in the
mach field of this structure. */
#define USER_SPECIFIED_MACHINE_TYPE (1 << 29)
/* Use internally by the target specific disassembly code. */
void *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)
(bfd_vma memaddr, bfd_byte *myaddr, unsigned int length,
struct disassemble_info *dinfo);
/* 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)
(int status, bfd_vma memaddr, struct disassemble_info *dinfo);
/* Function called to print ADDR. */
void (*print_address_func)
(bfd_vma addr, struct disassemble_info *dinfo);
/* Function called to determine if there is a symbol at the given ADDR.
If there is, the function returns 1, otherwise it returns 0.
This is used by ports which support an overlay manager where
the overlay number is held in the top part of an address. In
some circumstances we want to include the overlay number in the
address, (normally because there is a symbol associated with
that address), but sometimes we want to mask out the overlay bits. */
int (* symbol_at_address_func)
(bfd_vma addr, struct disassemble_info *dinfo);
/* Function called to check if a SYMBOL is can be displayed to the user.
This is used by some ports that want to hide special symbols when
displaying debugging outout. */
bfd_boolean (* symbol_is_valid)
(asymbol *, struct disassemble_info *dinfo);
/* These are for buffer_read_memory. */
bfd_byte *buffer;
bfd_vma buffer_vma;
size_t buffer_length;
/* This variable may be set by the instruction decoder. It suggests
the number of bytes objdump should display on a single line. If
the instruction decoder sets this, it should always set it to
the same value in order to get reasonable looking output. */
int bytes_per_line;
/* The next two variables control the way objdump displays the raw data. */
/* For example, if bytes_per_line is 8 and bytes_per_chunk is 4, the */
/* output will look like this:
00: 00000000 00000000
with the chunks displayed according to "display_endian". */
int bytes_per_chunk;
enum bfd_endian display_endian;
/* Number of octets per incremented target address
Normally one, but some DSPs have byte sizes of 16 or 32 bits. */
unsigned int octets_per_byte;
/* The number of zeroes we want to see at the end of a section before we
start skipping them. */
unsigned int skip_zeroes;
/* The number of zeroes to skip at the end of a section. If the number
of zeroes at the end is between SKIP_ZEROES_AT_END and SKIP_ZEROES,
they will be disassembled. If there are fewer than
SKIP_ZEROES_AT_END, they will be skipped. This is a heuristic
attempt to avoid disassembling zeroes inserted by section
alignment. */
unsigned int skip_zeroes_at_end;
/* Whether the disassembler always needs the relocations. */
bfd_boolean disassembler_needs_relocs;
/* Results from instruction decoders. Not all decoders yet support
this information. This info is set each time an instruction is
decoded, and is only valid for the last such instruction.
To determine whether this decoder supports this information, set
insn_info_valid to 0, decode an instruction, then check it. */
char insn_info_valid; /* Branch info has been set. */
char branch_delay_insns; /* How many sequential insn's will run before
a branch takes effect. (0 = normal) */
char data_size; /* Size of data reference in insn, in bytes */
enum dis_insn_type insn_type; /* Type of instruction */
bfd_vma target; /* Target address of branch or dref, if known;
zero if unknown. */
bfd_vma target2; /* Second target address for dref2 */
/* Command line options specific to the target disassembler. */
const char *disassembler_options;
/* If non-zero then try not disassemble beyond this address, even if
there are values left in the buffer. This address is the address
of the nearest symbol forwards from the start of the disassembly,
and it is assumed that it lies on the boundary between instructions.
If an instruction spans this address then this is an error in the
file being disassembled. */
bfd_vma stop_vma;
} disassemble_info;
/* This struct is used to pass information about valid disassembler
option arguments from the target to the generic GDB functions
that set and display them. */
typedef struct
{
/* Option argument name to use in descriptions. */
const char *name;
/* Vector of acceptable option argument values, NULL-terminated. */
const char **values;
} disasm_option_arg_t;
/* This struct is used to pass information about valid disassembler
options, their descriptions and arguments from the target to the
generic GDB functions that set and display them. Options are
defined by tuples of vector entries at each index. */
typedef struct
{
/* Vector of option names, NULL-terminated. */
const char **name;
/* Vector of option descriptions or NULL if none to be shown. */
const char **description;
/* Vector of option argument information pointers or NULL if no
option accepts an argument. NULL entries denote individual
options that accept no argument. */
const disasm_option_arg_t **arg;
} disasm_options_t;
/* This struct is used to pass information about valid disassembler
options and arguments from the target to the generic GDB functions
that set and display them. */
typedef struct
{
/* Valid disassembler options. Individual options that support
an argument will refer to entries in the ARGS vector. */
disasm_options_t options;
/* Vector of acceptable option arguments, NULL-terminated. This
collects all possible option argument choices, some of which
may be shared by different options from the OPTIONS member. */
disasm_option_arg_t *args;
} disasm_options_and_args_t;
/* Standard disassemblers. Disassemble one instruction at the given
target address. Return number of octets processed. */
typedef int (*disassembler_ftype) (bfd_vma, disassemble_info *);
/* Disassemblers used out side of opcodes library. */
extern int print_insn_m32c (bfd_vma, disassemble_info *);
extern int print_insn_mep (bfd_vma, disassemble_info *);
extern int print_insn_sh (bfd_vma, disassemble_info *);
extern int print_insn_sparc (bfd_vma, disassemble_info *);
extern int print_insn_rx (bfd_vma, disassemble_info *);
extern int print_insn_rl78 (bfd_vma, disassemble_info *);
extern int print_insn_rl78_g10 (bfd_vma, disassemble_info *);
extern int print_insn_rl78_g13 (bfd_vma, disassemble_info *);
extern int print_insn_rl78_g14 (bfd_vma, disassemble_info *);
extern disassembler_ftype arc_get_disassembler (bfd *);
extern disassembler_ftype cris_get_disassembler (bfd *);
extern void print_aarch64_disassembler_options (FILE *);
extern void print_i386_disassembler_options (FILE *);
extern void print_mips_disassembler_options (FILE *);
extern void print_nfp_disassembler_options (FILE *);
extern void print_ppc_disassembler_options (FILE *);
extern void print_riscv_disassembler_options (FILE *);
extern void print_arm_disassembler_options (FILE *);
extern void print_arc_disassembler_options (FILE *);
extern void print_s390_disassembler_options (FILE *);
extern void print_wasm32_disassembler_options (FILE *);
extern bfd_boolean aarch64_symbol_is_valid (asymbol *, struct disassemble_info *);
extern bfd_boolean arm_symbol_is_valid (asymbol *, struct disassemble_info *);
extern void disassemble_init_powerpc (struct disassemble_info *);
extern void disassemble_init_s390 (struct disassemble_info *);
extern void disassemble_init_wasm32 (struct disassemble_info *);
extern const disasm_options_and_args_t *disassembler_options_arm (void);
extern const disasm_options_and_args_t *disassembler_options_mips (void);
extern const disasm_options_and_args_t *disassembler_options_powerpc (void);
extern const disasm_options_and_args_t *disassembler_options_s390 (void);
/* Fetch the disassembler for a given architecture ARC, endianess (big
endian if BIG is true), bfd_mach value MACH, and ABFD, if that support
is available. ABFD may be NULL. */
extern disassembler_ftype disassembler (enum bfd_architecture arc,
bfd_boolean big, unsigned long mach,
bfd *abfd);
/* Amend the disassemble_info structure as necessary for the target architecture.
Should only be called after initialising the info->arch field. */
extern void disassemble_init_for_target (struct disassemble_info * dinfo);
/* Document any target specific options available from the disassembler. */
extern void disassembler_usage (FILE *);
/* Remove whitespace and consecutive commas. */
extern char *remove_whitespace_and_extra_commas (char *);
/* Like STRCMP, but treat ',' the same as '\0' so that we match
strings like "foobar" against "foobar,xxyyzz,...". */
extern int disassembler_options_cmp (const char *, const char *);
/* A helper function for FOR_EACH_DISASSEMBLER_OPTION. */
static inline const char *
next_disassembler_option (const char *options)
{
const char *opt = strchr (options, ',');
if (opt != NULL)
opt++;
return opt;
}
/* A macro for iterating over each comma separated option in OPTIONS. */
#define FOR_EACH_DISASSEMBLER_OPTION(OPT, OPTIONS) \
for ((OPT) = (OPTIONS); \
(OPT) != NULL; \
(OPT) = next_disassembler_option (OPT))
/* This block of definitions is for particular callers who read instructions
into a buffer before calling the instruction decoder. */
/* 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
(bfd_vma, bfd_byte *, unsigned 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 (int, bfd_vma, struct disassemble_info *);
/* Just print the address in hex. This is included for completeness even
though both GDB and objdump provide their own (to print symbolic
addresses). */
extern void generic_print_address
(bfd_vma, struct disassemble_info *);
/* Always true. */
extern int generic_symbol_at_address
(bfd_vma, struct disassemble_info *);
/* Also always true. */
extern bfd_boolean generic_symbol_is_valid
(asymbol *, struct disassemble_info *);
/* Method to initialize a disassemble_info struct. This should be
called by all applications creating such a struct. */
extern void init_disassemble_info (struct disassemble_info *dinfo, void *stream,
fprintf_ftype fprintf_func);
/* For compatibility with existing code. */
#define INIT_DISASSEMBLE_INFO(INFO, STREAM, FPRINTF_FUNC) \
init_disassemble_info (&(INFO), (STREAM), (fprintf_ftype) (FPRINTF_FUNC))
#define INIT_DISASSEMBLE_INFO_NO_ARCH(INFO, STREAM, FPRINTF_FUNC) \
init_disassemble_info (&(INFO), (STREAM), (fprintf_ftype) (FPRINTF_FUNC))
#ifdef __cplusplus
}
#endif
#endif /* ! defined (DIS_ASM_H) */
Reference in New Issue View Git Blame Copy Permalink