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450afa9497
When running the selftests, I run into:
...
$ gdb -q -batch -ex "maint selftest"
...
Running selftest execute_cfa_program::aarch64:ilp32.
warning: A handler for the OS ABI "GNU/Linux" is not built into this
configuration of GDB. Attempting to continue with the default aarch64:ilp32
settings.
...
and likewise for execute_cfa_program::i8086 and
execute_cfa_program::ia64-elf32.
The warning can easily be reproduced outside the selftests by doing:
...
$ gdb -q -batch -ex "set arch aarch64:ilp32"
...
and can be prevented by first doing "set osabi none".
Fix the warning by setting osabi to none while doing selftests that iterate
over all architectures.
This causes a regression in the print_one_insn selftests for the ARC
architecture.
The problem is pre-existing, and can be demonstrated (already without this
patch) using:
...
$ gdb -q -batch -ex "set osabi none" -ex "maint selftest print_one_insn::A6"
Running selftest print_one_insn::A6.
Self test failed: Cannot access memory at address 0x0
Ran 1 unit tests, 1 failed
$
...
For ARC, we use the generic case in print_one_insn_test, containing this code:
...
int kind = gdbarch_breakpoint_kind_from_pc (gdbarch, &pc);
...
insn = gdbarch_sw_breakpoint_from_kind (gdbarch, kind, &bplen);
...
The problem is that with osabi linux we trigger:
...
static int
arc_linux_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
{
return trap_size;
}
...
but with osabi none:
...
arc_breakpoint_kind_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr)
{
size_t length_with_limm = gdb_insn_length (gdbarch, *pcptr);
...
which needs access to memory, and will consequently fail.
Fix this in print_one_insn_test, in the default case, by iterating over
supported osabi's to makes sure we trigger arc_linux_breakpoint_kind_from_pc
which will give us a usable instruction to disassemble.
Tested on x86_64-linux.
96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
/* OS ABI variant handling for GDB.
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Copyright (C) 2001-2022 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 OSABI_H
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#define OSABI_H
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/* * List of known OS ABIs. If you change this, make sure to update the
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table in osabi.c. */
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enum gdb_osabi
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{
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GDB_OSABI_UNKNOWN = 0, /* keep this zero */
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GDB_OSABI_NONE,
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GDB_OSABI_SVR4,
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GDB_OSABI_HURD,
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GDB_OSABI_SOLARIS,
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GDB_OSABI_LINUX,
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GDB_OSABI_FREEBSD,
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GDB_OSABI_NETBSD,
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GDB_OSABI_OPENBSD,
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GDB_OSABI_WINCE,
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GDB_OSABI_GO32,
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GDB_OSABI_QNXNTO,
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GDB_OSABI_CYGWIN,
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GDB_OSABI_WINDOWS,
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GDB_OSABI_AIX,
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GDB_OSABI_DICOS,
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GDB_OSABI_DARWIN,
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GDB_OSABI_OPENVMS,
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GDB_OSABI_LYNXOS178,
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GDB_OSABI_NEWLIB,
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GDB_OSABI_SDE,
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GDB_OSABI_PIKEOS,
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GDB_OSABI_INVALID /* keep this last */
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};
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/* Register an OS ABI sniffer. Each arch/flavour may have more than
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one sniffer. This is used to e.g. differentiate one OS's a.out from
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another. The first sniffer to return something other than
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GDB_OSABI_UNKNOWN wins, so a sniffer should be careful to claim a file
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only if it knows for sure what it is. */
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void gdbarch_register_osabi_sniffer (enum bfd_architecture,
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enum bfd_flavour,
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enum gdb_osabi (*)(bfd *));
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/* Register a handler for an OS ABI variant for a given architecture
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and machine type. There should be only one handler for a given OS
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ABI for each architecture and machine type combination. */
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void gdbarch_register_osabi (enum bfd_architecture, unsigned long,
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enum gdb_osabi,
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void (*)(struct gdbarch_info,
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struct gdbarch *));
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/* Lookup the OS ABI corresponding to the specified BFD. */
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enum gdb_osabi gdbarch_lookup_osabi (bfd *);
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/* Lookup the OS ABI corresponding to the specified target description
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string. */
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enum gdb_osabi osabi_from_tdesc_string (const char *text);
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/* Return true if there's an OS ABI handler for INFO. */
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bool has_gdb_osabi_handler (struct gdbarch_info info);
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/* Initialize the gdbarch for the specified OS ABI variant. */
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void gdbarch_init_osabi (struct gdbarch_info, struct gdbarch *);
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/* Return the name of the specified OS ABI. */
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const char *gdbarch_osabi_name (enum gdb_osabi);
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/* Return a regular expression that matches the OS part of a GNU
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configury triplet for the given OSABI. */
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const char *osabi_triplet_regexp (enum gdb_osabi osabi);
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/* Helper routine for ELF file sniffers. This looks at ABI tag note
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sections to determine the OS ABI from the note. */
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void generic_elf_osabi_sniff_abi_tag_sections (bfd *, asection *,
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enum gdb_osabi *);
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#endif /* OSABI_H */
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