1 /* Target-dependent code for GNU/Linux x86.
3 Copyright (C) 2002-2016 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #ifndef I386_LINUX_TDEP_H
21 #define I386_LINUX_TDEP_H
23 /* The Linux kernel pretends there is an additional "orig_eax"
24 register. Since GDB needs access to that register to be able to
25 properly restart system calls when necessary (see
26 i386-linux-tdep.c) we need our own versions of a number of
27 functions that deal with GDB's register cache. */
29 /* Register number for the "orig_eax" pseudo-register. If this
30 pseudo-register contains a value >= 0 it is interpreted as the
31 system call number that the kernel is supposed to restart. */
32 #define I386_LINUX_ORIG_EAX_REGNUM (I386_ZMM7H_REGNUM + 1)
34 /* Total number of registers for GNU/Linux. */
35 #define I386_LINUX_NUM_REGS (I386_LINUX_ORIG_EAX_REGNUM + 1)
37 /* Get XSAVE extended state xcr0 from core dump. */
38 extern uint64_t i386_linux_core_read_xcr0 (bfd *abfd);
40 /* Linux target description. */
41 extern struct target_desc *tdesc_i386_linux;
42 extern struct target_desc *tdesc_i386_mmx_linux;
43 extern struct target_desc *tdesc_i386_avx_linux;
44 extern struct target_desc *tdesc_i386_mpx_linux;
45 extern struct target_desc *tdesc_i386_avx512_linux;
47 /* Format of XSAVE extended state is:
51 sw_usable_bytes[464..511]
52 xstate_hdr_bytes[512..575]
55 avx512_k_regs[1088..1152]
56 avx512_zmmh_regs0-7[1153..1407]
57 avx512_zmmh_regs8-15[1408..1663]
58 avx512_zmm_regs16-31[1664..2687]
62 Same memory layout will be used for the coredump NT_X86_XSTATE
63 representing the XSAVE extended state registers.
65 The first 8 bytes of the sw_usable_bytes[464..467] is the OS enabled
66 extended state mask, which is the same as the extended control register
67 0 (the XFEATURE_ENABLED_MASK register), XCR0. We can use this mask
68 together with the mask saved in the xstate_hdr_bytes to determine what
69 states the processor/OS supports and what state, used or initialized,
70 the process/thread is in. */
71 #define I386_LINUX_XSAVE_XCR0_OFFSET 464
73 extern int i386_linux_gregset_reg_offset[];
75 /* Return x86 siginfo type. */
76 extern struct type *x86_linux_get_siginfo_type (struct gdbarch *gdbarch);
78 #endif /* i386-linux-tdep.h */