cc2c4da881
Previously, backchain was read as a signed quantity, resulting in addresses like 0xfffffffffffeded0 instead of 0xfffeded0 returned by unwinder on 32-bit powerpc. While normally such addresses are masked off, this causes problems for tracepoints, since 0xfffffffffffeded0 is considered unavailable. Fixes a test failure in gdb.trace/entry-values.exp. gdb/ChangeLog: * corefile.c (safe_read_memory_unsigned_integer): New function. * gdbcore.h (safe_read_memory_unsigned_integer): New prototype. * rs6000-tdep.c (rs6000_frame_cache): Read backchain as unsigned.
240 lines
8.1 KiB
C
240 lines
8.1 KiB
C
/* Machine independent variables that describe the core file under GDB.
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Copyright (C) 1986-2016 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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/* Interface routines for core, executable, etc. */
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#if !defined (GDBCORE_H)
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#define GDBCORE_H 1
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struct type;
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struct regcache;
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#include "bfd.h"
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#include "exec.h"
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#include "target.h"
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/* Return the name of the executable file as a string.
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ERR nonzero means get error if there is none specified;
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otherwise return 0 in that case. */
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extern char *get_exec_file (int err);
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/* Nonzero if there is a core file. */
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extern int have_core_file_p (void);
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/* Report a memory error with error(). */
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extern void memory_error (enum target_xfer_status status, CORE_ADDR memaddr);
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/* The string 'memory_error' would use as exception message. Space
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for the result is malloc'd, caller must free. */
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extern char *memory_error_message (enum target_xfer_status err,
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struct gdbarch *gdbarch, CORE_ADDR memaddr);
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/* Like target_read_memory, but report an error if can't read. */
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extern void read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
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/* Like target_read_stack, but report an error if can't read. */
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extern void read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
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/* Like target_read_code, but report an error if can't read. */
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extern void read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len);
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/* Read an integer from debugged memory, given address and number of
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bytes. */
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extern LONGEST read_memory_integer (CORE_ADDR memaddr,
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int len, enum bfd_endian byte_order);
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extern int safe_read_memory_integer (CORE_ADDR memaddr, int len,
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enum bfd_endian byte_order,
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LONGEST *return_value);
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/* Read an unsigned integer from debugged memory, given address and
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number of bytes. */
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extern ULONGEST read_memory_unsigned_integer (CORE_ADDR memaddr,
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int len,
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enum bfd_endian byte_order);
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extern int safe_read_memory_unsigned_integer (CORE_ADDR memaddr, int len,
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enum bfd_endian byte_order,
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ULONGEST *return_value);
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/* Read an integer from debugged code memory, given address,
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number of bytes, and byte order for code. */
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extern LONGEST read_code_integer (CORE_ADDR memaddr, int len,
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enum bfd_endian byte_order);
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/* Read an unsigned integer from debugged code memory, given address,
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number of bytes, and byte order for code. */
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extern ULONGEST read_code_unsigned_integer (CORE_ADDR memaddr,
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int len,
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enum bfd_endian byte_order);
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/* Read a null-terminated string from the debuggee's memory, given
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address, a buffer into which to place the string, and the maximum
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available space. */
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extern void read_memory_string (CORE_ADDR, char *, int);
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/* Read the pointer of type TYPE at ADDR, and return the address it
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represents. */
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CORE_ADDR read_memory_typed_address (CORE_ADDR addr, struct type *type);
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/* Same as target_write_memory, but report an error if can't
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write. */
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extern void write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
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ssize_t len);
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/* Same as write_memory, but notify 'memory_changed' observers. */
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extern void write_memory_with_notification (CORE_ADDR memaddr,
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const bfd_byte *myaddr,
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ssize_t len);
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/* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer. */
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extern void write_memory_unsigned_integer (CORE_ADDR addr, int len,
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enum bfd_endian byte_order,
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ULONGEST value);
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/* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer. */
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extern void write_memory_signed_integer (CORE_ADDR addr, int len,
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enum bfd_endian byte_order,
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LONGEST value);
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/* Hook for `exec_file_command' command to call. */
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extern void (*deprecated_exec_file_display_hook) (const char *filename);
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/* Hook for "file_command", which is more useful than above
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(because it is invoked AFTER symbols are read, not before). */
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extern void (*deprecated_file_changed_hook) (char *filename);
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extern void specify_exec_file_hook (void (*hook) (const char *filename));
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/* Binary File Diddler for the core file. */
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extern bfd *core_bfd;
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extern struct target_ops *core_target;
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/* Whether to open exec and core files read-only or read-write. */
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extern int write_files;
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extern void core_file_command (char *filename, int from_tty);
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extern void exec_file_attach (const char *filename, int from_tty);
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/* If the filename of the main executable is unknown, attempt to
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determine it. If a filename is determined, proceed as though
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it was just specified with the "file" command. Do nothing if
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the filename of the main executable is already known. */
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extern void exec_file_locate_attach (int pid, int from_tty);
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extern void exec_file_clear (int from_tty);
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extern void validate_files (void);
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/* The current default bfd target. */
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extern char *gnutarget;
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extern void set_gnutarget (char *);
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/* Structure to keep track of core register reading functions for
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various core file types. */
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struct core_fns
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{
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/* BFD flavour that a core file handler is prepared to read. This
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can be used by the handler's core tasting function as a first
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level filter to reject BFD's that don't have the right
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flavour. */
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enum bfd_flavour core_flavour;
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/* Core file handler function to call to recognize corefile
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formats that BFD rejects. Some core file format just don't fit
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into the BFD model, or may require other resources to identify
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them, that simply aren't available to BFD (such as symbols from
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another file). Returns nonzero if the handler recognizes the
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format, zero otherwise. */
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int (*check_format) (bfd *);
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/* Core file handler function to call to ask if it can handle a
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given core file format or not. Returns zero if it can't,
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nonzero otherwise. */
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int (*core_sniffer) (struct core_fns *, bfd *);
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/* Extract the register values out of the core file and supply them
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into REGCACHE.
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CORE_REG_SECT points to the register values themselves, read into
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memory.
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CORE_REG_SIZE is the size of that area.
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WHICH says which set of registers we are handling:
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0 --- integer registers
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2 --- floating-point registers, on machines where they are
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discontiguous
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3 --- extended floating-point registers, on machines where
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these are present in yet a third area. (GNU/Linux uses
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this to get at the SSE registers.)
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REG_ADDR is the offset from u.u_ar0 to the register values relative to
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core_reg_sect. This is used with old-fashioned core files to locate the
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registers in a large upage-plus-stack ".reg" section. Original upage
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address X is at location core_reg_sect+x+reg_addr. */
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void (*core_read_registers) (struct regcache *regcache,
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char *core_reg_sect,
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unsigned core_reg_size,
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int which, CORE_ADDR reg_addr);
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/* Finds the next struct core_fns. They are allocated and
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initialized in whatever module implements the functions pointed
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to; an initializer calls deprecated_add_core_fns to add them to
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the global chain. */
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struct core_fns *next;
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};
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/* NOTE: cagney/2004-04-05: Replaced by "regset.h" and
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regset_from_core_section(). */
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extern void deprecated_add_core_fns (struct core_fns *cf);
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extern int default_core_sniffer (struct core_fns *cf, bfd * abfd);
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extern int default_check_format (bfd * abfd);
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#endif /* !defined (GDBCORE_H) */
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