59 lines
2.1 KiB
C
59 lines
2.1 KiB
C
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/* Low-level siginfo manipulation for amd64.
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Copyright (C) 2016-2020 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 NAT_AMD64_LINUX_SIGINFO_H
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#define NAT_AMD64_LINUX_SIGINFO_H
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#include <signal.h> /* For siginfo_t. */
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/* When GDB is built as a 64-bit application on Linux, the
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PTRACE_GETSIGINFO data is always presented in 64-bit layout. Since
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debugging a 32-bit inferior with a 64-bit GDB should look the same
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as debugging it with a 32-bit GDB, we do the 32-bit <-> 64-bit
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conversion in-place ourselves.
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In other to make this conversion independent of the system where gdb
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is compiled the most complete version of the siginfo, named as native
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siginfo, is used internally as an intermediate step.
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Conversion using nat_siginfo is exemplified below:
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compat_siginfo_from_siginfo or compat_x32_siginfo_from_siginfo
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buffer (from the kernel) -> nat_siginfo -> 32 / X32 siginfo
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siginfo_from_compat_x32_siginfo or siginfo_from_compat_siginfo
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32 / X32 siginfo -> nat_siginfo -> buffer (to the kernel) */
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/* Kind of siginfo fixup to be performed. */
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enum amd64_siginfo_fixup_mode
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{
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FIXUP_32 = 1, /* Fixup for 32bit. */
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FIXUP_X32 = 2 /* Fixup for x32. */
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};
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/* Common code for performing the fixup of the siginfo. */
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int amd64_linux_siginfo_fixup_common (siginfo_t *native, gdb_byte *inf,
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int direction,
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enum amd64_siginfo_fixup_mode mode);
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#endif /* NAT_AMD64_LINUX_SIGINFO_H */
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