| /* Target-dependent code for GNU/Linux x86. |
| |
| Copyright (C) 2002-2003, 2007-2012 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| 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 of the License, 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, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef I386_LINUX_TDEP_H |
| #define I386_LINUX_TDEP_H |
| |
| /* The Linux kernel pretends there is an additional "orig_eax" |
| register. Since GDB needs access to that register to be able to |
| properly restart system calls when necessary (see |
| i386-linux-tdep.c) we need our own versions of a number of |
| functions that deal with GDB's register cache. */ |
| |
| /* Register number for the "orig_eax" pseudo-register. If this |
| pseudo-register contains a value >= 0 it is interpreted as the |
| system call number that the kernel is supposed to restart. */ |
| #define I386_LINUX_ORIG_EAX_REGNUM I386_AVX_NUM_REGS |
| |
| /* Total number of registers for GNU/Linux. */ |
| #define I386_LINUX_NUM_REGS (I386_LINUX_ORIG_EAX_REGNUM + 1) |
| |
| /* Get XSAVE extended state xcr0 from core dump. */ |
| extern uint64_t i386_linux_core_read_xcr0 |
| (struct gdbarch *gdbarch, struct target_ops *target, bfd *abfd); |
| |
| /* Linux target description. */ |
| extern struct target_desc *tdesc_i386_linux; |
| extern struct target_desc *tdesc_i386_mmx_linux; |
| extern struct target_desc *tdesc_i386_avx_linux; |
| |
| /* Format of XSAVE extended state is: |
| struct |
| { |
| fxsave_bytes[0..463] |
| sw_usable_bytes[464..511] |
| xstate_hdr_bytes[512..575] |
| avx_bytes[576..831] |
| future_state etc |
| }; |
| |
| Same memory layout will be used for the coredump NT_X86_XSTATE |
| representing the XSAVE extended state registers. |
| |
| The first 8 bytes of the sw_usable_bytes[464..467] is the OS enabled |
| extended state mask, which is the same as the extended control register |
| 0 (the XFEATURE_ENABLED_MASK register), XCR0. We can use this mask |
| together with the mask saved in the xstate_hdr_bytes to determine what |
| states the processor/OS supports and what state, used or initialized, |
| the process/thread is in. */ |
| #define I386_LINUX_XSAVE_XCR0_OFFSET 464 |
| |
| extern int i386_linux_gregset_reg_offset[]; |
| |
| #endif /* i386-linux-tdep.h */ |
