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48136e006e
Add new commands under the "memory-tag" prefix to allow users to inspect, modify and check memory tags in different ways. The available subcommands are the following: - memory-tag print-logical-tag <expression>: Prints the logical tag for a particular address. - memory-tag withltag <expression> <tag>: Prints the address tagged with the logical tag <tag>. - memory-tag print-allocation-tag <expression>: Prints the allocation tag for a particular address. - memory-tag setatag <expression> <length> <tags>: Sets one or more allocation tags to the specified tags. - memory-tag check <expression>: Checks if the logical tag in <address> matches its allocation tag. These commands make use of the memory tagging gdbarch methods, and are still available, but disabled, when memory tagging is not supported by the architecture. I've pondered about a way to make these commands invisible when memory tagging is not available, but given the check is at runtime (and support may come and go based on a process' configuration), that is a bit too late in the process to either not include the commands or get rid of them. Ideas are welcome. gdb/ChangeLog: 2021-03-24 Luis Machado <luis.machado@linaro.org> * printcmd.c: Include gdbsupport/rsp-low.h. (memory_tag_list): New static global. (process_print_command_args): Factored out of print_command_1. (print_command_1): Use process_print_command_args. (show_addr_not_tagged, show_memory_tagging_unsupported) (memory_tag_command, memory_tag_print_tag_command) (memory_tag_print_logical_tag_command) (memory_tag_print_allocation_tag_command, parse_with_logical_tag_input) (memory_tag_with_logical_tag_command, parse_set_allocation_tag_input) (memory_tag_set_allocation_tag_command, memory_tag_check_command): New functions. (_initialize_printcmd): Add "memory-tag" prefix and subcommands. gdbsupport/ChangeLog: 2021-03-24 Luis Machado <luis.machado@linaro.org> * rsp-low.cc (fromhex, hex2bin): Move to ... * common-utils.cc: ... here. (fromhex) Change error message text to not be RSP-specific. * rsp-low.h (fromhex, hex2bin): Move to ... * common-utils.h: ... here.
83 lines
3.1 KiB
C++
83 lines
3.1 KiB
C++
/* Low-level RSP routines for GDB, the GNU debugger.
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Copyright (C) 1988-2021 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef COMMON_RSP_LOW_H
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#define COMMON_RSP_LOW_H
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/* Convert number NIB to a hex digit. */
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extern int tohex (int nib);
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/* Write a character representing the low order four bits of NIBBLE in
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hex to *BUF. Returns BUF+1. */
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extern char *pack_nibble (char *buf, int nibble);
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/* Write the low byte of BYTE in hex to *BUF. Returns BUF+2. */
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extern char *pack_hex_byte (char *pkt, int byte);
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/* Read hex digits from BUFF and convert to a number, which is stored
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in RESULT. Reads until a non-hex digit is seen. Returns a pointer
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to the terminating character. */
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extern const char *unpack_varlen_hex (const char *buff, ULONGEST *result);
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/* Like hex2bin, but return a std::string. */
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extern std::string hex2str (const char *hex);
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/* Like hex2bin, but return a std::string. */
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extern std::string hex2str (const char *hex, int count);
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/* Convert some bytes to a hexadecimal representation. BIN holds the
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bytes to convert. COUNT says how many bytes to convert. The
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resulting characters are stored in HEX, followed by a NUL
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character. Returns the number of bytes actually converted. */
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extern int bin2hex (const gdb_byte *bin, char *hex, int count);
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/* Overloaded version of bin2hex that returns a std::string. */
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extern std::string bin2hex (const gdb_byte *bin, int count);
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/* Convert BUFFER, binary data at least LEN_UNITS addressable memory units
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long, into escaped binary data in OUT_BUF. Only copy memory units that fit
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completely in OUT_BUF. Set *OUT_LEN_UNITS to the number of units from
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BUFFER successfully encoded in OUT_BUF, and return the number of bytes used
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in OUT_BUF. The total number of bytes in the output buffer will be at most
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OUT_MAXLEN_BYTES. This function properly escapes '*', and so is suitable
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for the server side as well as the client. */
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extern int remote_escape_output (const gdb_byte *buffer, int len_units,
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int unit_size, gdb_byte *out_buf,
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int *out_len_units, int out_maxlen_bytes);
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/* Convert BUFFER, escaped data LEN bytes long, into binary data
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in OUT_BUF. Return the number of bytes written to OUT_BUF.
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Raise an error if the total number of bytes exceeds OUT_MAXLEN.
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This function reverses remote_escape_output. */
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extern int remote_unescape_input (const gdb_byte *buffer, int len,
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gdb_byte *out_buf, int out_maxlen);
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#endif /* COMMON_RSP_LOW_H */
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