1 /* Target-dependent code for GNU/Linux x86.
3 Copyright (C) 2002, 2003, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
6 This file is part of GDB.
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.
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.
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/>. */
21 #ifndef I386_LINUX_TDEP_H
22 #define I386_LINUX_TDEP_H
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. */
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
35 /* Total number of registers for GNU/Linux. */
36 #define I386_LINUX_NUM_REGS (I386_LINUX_ORIG_EAX_REGNUM + 1)
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);
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;
47 /* Format of XSAVE extended state is:
51 sw_usable_bytes[464..511]
52 xstate_hdr_bytes[512..575]
57 Same memory layout will be used for the coredump NT_X86_XSTATE
58 representing the XSAVE extended state registers.
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
68 extern int i386_linux_gregset_reg_offset[];
70 #endif /* i386-linux-tdep.h */