| 1 | /* Target-dependent code for GNU/Linux x86. |
| 2 | |
| 3 | Copyright (C) 2002, 2003, 2007, 2008, 2009, 2010, 2011 |
| 4 | Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #ifndef I386_LINUX_TDEP_H |
| 22 | #define I386_LINUX_TDEP_H |
| 23 | |
| 24 | /* The Linux kernel pretends there is an additional "orig_eax" |
| 25 | register. Since GDB needs access to that register to be able to |
| 26 | properly restart system calls when necessary (see |
| 27 | i386-linux-tdep.c) we need our own versions of a number of |
| 28 | functions that deal with GDB's register cache. */ |
| 29 | |
| 30 | /* Register number for the "orig_eax" pseudo-register. If this |
| 31 | pseudo-register contains a value >= 0 it is interpreted as the |
| 32 | system call number that the kernel is supposed to restart. */ |
| 33 | #define I386_LINUX_ORIG_EAX_REGNUM I386_AVX_NUM_REGS |
| 34 | |
| 35 | /* Total number of registers for GNU/Linux. */ |
| 36 | #define I386_LINUX_NUM_REGS (I386_LINUX_ORIG_EAX_REGNUM + 1) |
| 37 | |
| 38 | /* Get XSAVE extended state xcr0 from core dump. */ |
| 39 | extern uint64_t i386_linux_core_read_xcr0 |
| 40 | (struct gdbarch *gdbarch, struct target_ops *target, bfd *abfd); |
| 41 | |
| 42 | /* Linux target description. */ |
| 43 | extern struct target_desc *tdesc_i386_linux; |
| 44 | extern struct target_desc *tdesc_i386_mmx_linux; |
| 45 | extern struct target_desc *tdesc_i386_avx_linux; |
| 46 | |
| 47 | /* Format of XSAVE extended state is: |
| 48 | struct |
| 49 | { |
| 50 | fxsave_bytes[0..463] |
| 51 | sw_usable_bytes[464..511] |
| 52 | xstate_hdr_bytes[512..575] |
| 53 | avx_bytes[576..831] |
| 54 | future_state etc |
| 55 | }; |
| 56 | |
| 57 | Same memory layout will be used for the coredump NT_X86_XSTATE |
| 58 | representing the XSAVE extended state registers. |
| 59 | |
| 60 | The first 8 bytes of the sw_usable_bytes[464..467] is the OS enabled |
| 61 | extended state mask, which is the same as the extended control register |
| 62 | 0 (the XFEATURE_ENABLED_MASK register), XCR0. We can use this mask |
| 63 | together with the mask saved in the xstate_hdr_bytes to determine what |
| 64 | states the processor/OS supports and what state, used or initialized, |
| 65 | the process/thread is in. */ |
| 66 | #define I386_LINUX_XSAVE_XCR0_OFFSET 464 |
| 67 | |
| 68 | extern int i386_linux_gregset_reg_offset[]; |
| 69 | |
| 70 | #endif /* i386-linux-tdep.h */ |