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849d0ba802
pseudo registers are either from raw registers or memory, so gdbarch methods pseudo_register_read and pseudo_register_read_value should have regcache object which only have read methods. In other words, we should disallow writing to regcache in these two gdbarch methods. In order to apply this restriction, this patch adds a new class readable_regcache, derived from reg_buffer, and it only has raw_read and cooked_read methods. regcache is derived from readable_regcache. This patch also passes readable_regcache instead of regcache to gdbarch methods pseudo_register_read and pseudo_register_read_value. This patch moves raw_read* and cooked_read* methods to readable_regcache, which is straightforward. One thing not straightforward is that I split regcache::xfer_part to readable_regcache::read_part and regcache::write_part, because readable_regcache can only have methods to read. readable_regcache is an abstract base class, and it has a pure virtual function raw_update, because I don't want readable_regcache know where these raw registers are from. They can be from either the target (readwrite regcache) or the regcache itself (readonly regcache). gdb: 2018-02-21 Yao Qi <yao.qi@linaro.org> * aarch64-tdep.c (aarch64_pseudo_register_read_value): Change parameter type to 'readable_regcache *'. * amd64-tdep.c (amd64_pseudo_register_read_value): Likewise. * arm-tdep.c (arm_neon_quad_read): Likewise. (arm_pseudo_read): Likewise. * avr-tdep.c (avr_pseudo_register_read): Likewise. * bfin-tdep.c (bfin_pseudo_register_read): Likewise. * frv-tdep.c (frv_pseudo_register_read): Likewise. * gdbarch.c: Re-generated. * gdbarch.h: Re-generated. * gdbarch.sh (pseudo_register_read): Change parameter type to 'readable_regcache *'. (pseudo_register_read_value): Likewise. * h8300-tdep.c (pseudo_from_raw_register): Likewise. (h8300_pseudo_register_read): Likewise. * hppa-tdep.c (hppa_pseudo_register_read): Likewise. * i386-tdep.c (i386_mmx_regnum_to_fp_regnum): Likewise. (i386_pseudo_register_read_into_value): Likewise. (i386_pseudo_register_read_value): Likewise. * i386-tdep.h (i386_pseudo_register_read_into_value): Update declaration. * ia64-tdep.c (ia64_pseudo_register_read): Likewise. * m32c-tdep.c (m32c_raw_read): Likewise. (m32c_read_flg): Likewise. (m32c_banked_register): Likewise. (m32c_banked_read): Likewise. (m32c_sb_read): Likewise. (m32c_part_read): Likewise. (m32c_cat_read): Likewise. (m32c_r3r2r1r0_read): Likewise. (m32c_pseudo_register_read): Likewise. * m68hc11-tdep.c (m68hc11_pseudo_register_read): Likewise. * mep-tdep.c (mep_pseudo_cr32_read): Likewise. (mep_pseudo_cr64_read): Likewise. (mep_pseudo_register_read): Likewise. * mips-tdep.c (mips_pseudo_register_read): Likewise. * msp430-tdep.c (msp430_pseudo_register_read): Likewise. * nds32-tdep.c (nds32_pseudo_register_read): Likewise. * regcache.c (regcache::raw_read): Move it to readable_regcache. (regcache::cooked_read): Likewise. (regcache::cooked_read_value): Likewise. (regcache_cooked_read_signed): (regcache::cooked_read): Likewise. * regcache.h (readable_regcache): New class. (regcache): Inherit readable_regcache. Move some methods to readable_regcache. * rl78-tdep.c (rl78_pseudo_register_read): Change parameter type to 'readable_regcache *'. * rs6000-tdep.c (do_regcache_raw_read): Remove. (e500_pseudo_register_read): Change parameter type to 'readable_regcache *'. (dfp_pseudo_register_read): Likewise. (vsx_pseudo_register_read): Likewise. (efpr_pseudo_register_read): Likewise. * s390-tdep.c (s390_pseudo_register_read): Likewise. * sh-tdep.c (sh_pseudo_register_read): Likewise. * sh64-tdep.c (pseudo_register_read_portions): Likewise. (sh64_pseudo_register_read): Likewise. * sparc-tdep.c (sparc32_pseudo_register_read): Likewise. * sparc64-tdep.c (sparc64_pseudo_register_read): Likewise. * spu-tdep.c (spu_pseudo_register_read_spu): Likewise. (spu_pseudo_register_read): Likewise. * xtensa-tdep.c (xtensa_register_read_masked): Likewise. (xtensa_pseudo_register_read): Likewise.
471 lines
15 KiB
C
471 lines
15 KiB
C
/* Target-dependent code for the i386.
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Copyright (C) 2001-2018 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 I386_TDEP_H
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#define I386_TDEP_H
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#include "infrun.h"
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struct frame_info;
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struct gdbarch;
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struct reggroup;
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struct regset;
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struct regcache;
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/* GDB's i386 target supports both the 32-bit Intel Architecture
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(IA-32) and the 64-bit AMD x86-64 architecture. Internally it uses
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a similar register layout for both.
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- General purpose registers
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- FPU data registers
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- FPU control registers
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- SSE data registers
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- SSE control register
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The general purpose registers for the x86-64 architecture are quite
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different from IA-32. Therefore, gdbarch_fp0_regnum
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determines the register number at which the FPU data registers
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start. The number of FPU data and control registers is the same
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for both architectures. The number of SSE registers however,
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differs and is determined by the num_xmm_regs member of `struct
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gdbarch_tdep'. */
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/* Convention for returning structures. */
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enum struct_return
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{
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pcc_struct_return, /* Return "short" structures in memory. */
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reg_struct_return /* Return "short" structures in registers. */
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};
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/* i386 architecture specific information. */
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struct gdbarch_tdep
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{
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/* General-purpose registers. */
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int *gregset_reg_offset;
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int gregset_num_regs;
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size_t sizeof_gregset;
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/* Floating-point registers. */
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size_t sizeof_fpregset;
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/* Register number for %st(0). The register numbers for the other
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registers follow from this one. Set this to -1 to indicate the
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absence of an FPU. */
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int st0_regnum;
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/* Number of MMX registers. */
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int num_mmx_regs;
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/* Register number for %mm0. Set this to -1 to indicate the absence
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of MMX support. */
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int mm0_regnum;
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/* Number of pseudo YMM registers. */
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int num_ymm_regs;
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/* Register number for %ymm0. Set this to -1 to indicate the absence
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of pseudo YMM register support. */
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int ymm0_regnum;
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/* Number of AVX512 OpMask registers (K-registers) */
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int num_k_regs;
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/* Register number for %k0. Set this to -1 to indicate the absence
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of AVX512 OpMask register support. */
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int k0_regnum;
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/* Number of pseudo ZMM registers ($zmm0-$zmm31). */
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int num_zmm_regs;
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/* Register number for %zmm0. Set this to -1 to indicate the absence
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of pseudo ZMM register support. */
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int zmm0_regnum;
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/* Number of byte registers. */
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int num_byte_regs;
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/* Register pseudo number for %al. */
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int al_regnum;
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/* Number of pseudo word registers. */
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int num_word_regs;
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/* Register number for %ax. */
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int ax_regnum;
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/* Number of pseudo dword registers. */
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int num_dword_regs;
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/* Register number for %eax. Set this to -1 to indicate the absence
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of pseudo dword register support. */
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int eax_regnum;
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/* Number of core registers. */
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int num_core_regs;
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/* Number of SSE registers. */
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int num_xmm_regs;
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/* Number of SSE registers added in AVX512. */
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int num_xmm_avx512_regs;
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/* Register number of XMM16, the first XMM register added in AVX512. */
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int xmm16_regnum;
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/* Number of YMM registers added in AVX512. */
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int num_ymm_avx512_regs;
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/* Register number of YMM16, the first YMM register added in AVX512. */
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int ymm16_regnum;
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/* Bits of the extended control register 0 (the XFEATURE_ENABLED_MASK
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register), excluding the x87 bit, which are supported by this GDB. */
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uint64_t xcr0;
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/* Offset of XCR0 in XSAVE extended state. */
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int xsave_xcr0_offset;
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/* Register names. */
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const char **register_names;
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/* Register number for %ymm0h. Set this to -1 to indicate the absence
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of upper YMM register support. */
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int ymm0h_regnum;
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/* Upper YMM register names. Only used for tdesc_numbered_register. */
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const char **ymmh_register_names;
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/* Register number for %ymm16h. Set this to -1 to indicate the absence
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of support for YMM16-31. */
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int ymm16h_regnum;
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/* YMM16-31 register names. Only used for tdesc_numbered_register. */
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const char **ymm16h_register_names;
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/* Register number for %bnd0r. Set this to -1 to indicate the absence
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bound registers. */
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int bnd0r_regnum;
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/* Register number for pseudo register %bnd0. Set this to -1 to indicate the absence
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bound registers. */
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int bnd0_regnum;
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/* Register number for %bndcfgu. Set this to -1 to indicate the absence
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bound control registers. */
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int bndcfgu_regnum;
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/* MPX register names. Only used for tdesc_numbered_register. */
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const char **mpx_register_names;
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/* Register number for %zmm0h. Set this to -1 to indicate the absence
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of ZMM_HI256 register support. */
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int zmm0h_regnum;
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/* OpMask register names. */
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const char **k_register_names;
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/* ZMM register names. Only used for tdesc_numbered_register. */
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const char **zmmh_register_names;
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/* XMM16-31 register names. Only used for tdesc_numbered_register. */
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const char **xmm_avx512_register_names;
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/* YMM16-31 register names. Only used for tdesc_numbered_register. */
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const char **ymm_avx512_register_names;
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/* Number of PKEYS registers. */
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int num_pkeys_regs;
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/* Register number for PKRU register. */
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int pkru_regnum;
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/* PKEYS register names. */
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const char **pkeys_register_names;
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/* Target description. */
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const struct target_desc *tdesc;
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/* Register group function. */
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gdbarch_register_reggroup_p_ftype *register_reggroup_p;
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/* Offset of saved PC in jmp_buf. */
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int jb_pc_offset;
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/* Convention for returning structures. */
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enum struct_return struct_return;
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/* Address range where sigtramp lives. */
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CORE_ADDR sigtramp_start;
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CORE_ADDR sigtramp_end;
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/* Detect sigtramp. */
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int (*sigtramp_p) (struct frame_info *);
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/* Get address of sigcontext for sigtramp. */
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CORE_ADDR (*sigcontext_addr) (struct frame_info *);
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/* Offset of registers in `struct sigcontext'. */
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int *sc_reg_offset;
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int sc_num_regs;
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/* Offset of saved PC and SP in `struct sigcontext'. Usage of these
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is deprecated, please use `sc_reg_offset' instead. */
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int sc_pc_offset;
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int sc_sp_offset;
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/* ISA-specific data types. */
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struct type *i386_mmx_type;
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struct type *i386_ymm_type;
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struct type *i386_zmm_type;
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struct type *i387_ext_type;
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struct type *i386_bnd_type;
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/* Process record/replay target. */
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/* The map for registers because the AMD64's registers order
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in GDB is not same as I386 instructions. */
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const int *record_regmap;
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/* Parse intx80 args. */
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int (*i386_intx80_record) (struct regcache *regcache);
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/* Parse sysenter args. */
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int (*i386_sysenter_record) (struct regcache *regcache);
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/* Parse syscall args. */
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int (*i386_syscall_record) (struct regcache *regcache);
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/* Regsets. */
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const struct regset *fpregset;
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};
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/* Floating-point registers. */
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/* All FPU control regusters (except for FIOFF and FOOFF) are 16-bit
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(at most) in the FPU, but are zero-extended to 32 bits in GDB's
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register cache. */
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/* Return non-zero if REGNUM matches the FP register and the FP
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register set is active. */
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extern int i386_fp_regnum_p (struct gdbarch *, int);
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extern int i386_fpc_regnum_p (struct gdbarch *, int);
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/* Register numbers of various important registers. */
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enum i386_regnum
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{
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I386_EAX_REGNUM, /* %eax */
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I386_ECX_REGNUM, /* %ecx */
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I386_EDX_REGNUM, /* %edx */
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I386_EBX_REGNUM, /* %ebx */
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I386_ESP_REGNUM, /* %esp */
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I386_EBP_REGNUM, /* %ebp */
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I386_ESI_REGNUM, /* %esi */
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I386_EDI_REGNUM, /* %edi */
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I386_EIP_REGNUM, /* %eip */
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I386_EFLAGS_REGNUM, /* %eflags */
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I386_CS_REGNUM, /* %cs */
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I386_SS_REGNUM, /* %ss */
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I386_DS_REGNUM, /* %ds */
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I386_ES_REGNUM, /* %es */
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I386_FS_REGNUM, /* %fs */
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I386_GS_REGNUM, /* %gs */
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I386_ST0_REGNUM, /* %st(0) */
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I386_MXCSR_REGNUM = 40, /* %mxcsr */
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I386_YMM0H_REGNUM, /* %ymm0h */
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I386_YMM7H_REGNUM = I386_YMM0H_REGNUM + 7,
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I386_BND0R_REGNUM,
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I386_BND3R_REGNUM = I386_BND0R_REGNUM + 3,
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I386_BNDCFGU_REGNUM,
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I386_BNDSTATUS_REGNUM,
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I386_K0_REGNUM, /* %k0 */
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I386_K7_REGNUM = I386_K0_REGNUM + 7,
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I386_ZMM0H_REGNUM, /* %zmm0h */
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I386_ZMM7H_REGNUM = I386_ZMM0H_REGNUM + 7,
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I386_PKRU_REGNUM
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};
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/* Register numbers of RECORD_REGMAP. */
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enum record_i386_regnum
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{
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X86_RECORD_REAX_REGNUM,
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X86_RECORD_RECX_REGNUM,
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X86_RECORD_REDX_REGNUM,
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X86_RECORD_REBX_REGNUM,
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X86_RECORD_RESP_REGNUM,
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X86_RECORD_REBP_REGNUM,
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X86_RECORD_RESI_REGNUM,
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X86_RECORD_REDI_REGNUM,
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X86_RECORD_R8_REGNUM,
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X86_RECORD_R9_REGNUM,
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X86_RECORD_R10_REGNUM,
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X86_RECORD_R11_REGNUM,
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X86_RECORD_R12_REGNUM,
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X86_RECORD_R13_REGNUM,
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X86_RECORD_R14_REGNUM,
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X86_RECORD_R15_REGNUM,
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X86_RECORD_REIP_REGNUM,
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X86_RECORD_EFLAGS_REGNUM,
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X86_RECORD_CS_REGNUM,
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X86_RECORD_SS_REGNUM,
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X86_RECORD_DS_REGNUM,
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X86_RECORD_ES_REGNUM,
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X86_RECORD_FS_REGNUM,
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X86_RECORD_GS_REGNUM,
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};
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#define I386_NUM_GREGS 16
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#define I386_NUM_XREGS 9
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#define I386_SSE_NUM_REGS (I386_MXCSR_REGNUM + 1)
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#define I386_AVX_NUM_REGS (I386_YMM7H_REGNUM + 1)
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#define I386_MPX_NUM_REGS (I386_BNDSTATUS_REGNUM + 1)
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#define I386_AVX512_NUM_REGS (I386_ZMM7H_REGNUM + 1)
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#define I386_PKEYS_NUM_REGS (I386_PKRU_REGNUM + 1)
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/* Size of the largest register. */
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#define I386_MAX_REGISTER_SIZE 64
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/* Types for i386-specific registers. */
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extern struct type *i387_ext_type (struct gdbarch *gdbarch);
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/* Checks of different pseudo-registers. */
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extern int i386_byte_regnum_p (struct gdbarch *gdbarch, int regnum);
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extern int i386_word_regnum_p (struct gdbarch *gdbarch, int regnum);
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extern int i386_dword_regnum_p (struct gdbarch *gdbarch, int regnum);
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extern int i386_xmm_regnum_p (struct gdbarch *gdbarch, int regnum);
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extern int i386_xmm_avx512_regnum_p (struct gdbarch * gdbarch, int regnum);
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extern int i386_ymm_regnum_p (struct gdbarch *gdbarch, int regnum);
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extern int i386_ymm_avx512_regnum_p (struct gdbarch *gdbarch, int regnum);
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extern int i386_bnd_regnum_p (struct gdbarch *gdbarch, int regnum);
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extern int i386_k_regnum_p (struct gdbarch *gdbarch, int regnum);
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extern int i386_zmm_regnum_p (struct gdbarch *gdbarch, int regnum);
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extern int i386_zmmh_regnum_p (struct gdbarch *gdbarch, int regnum);
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extern bool i386_pkru_regnum_p (struct gdbarch *gdbarch, int regnum);
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extern const char *i386_pseudo_register_name (struct gdbarch *gdbarch,
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int regnum);
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extern struct type *i386_pseudo_register_type (struct gdbarch *gdbarch,
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int regnum);
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extern void i386_pseudo_register_read_into_value (struct gdbarch *gdbarch,
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readable_regcache *regcache,
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int regnum,
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struct value *result);
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extern void i386_pseudo_register_write (struct gdbarch *gdbarch,
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struct regcache *regcache,
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int regnum, const gdb_byte *buf);
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extern int i386_ax_pseudo_register_collect (struct gdbarch *gdbarch,
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struct agent_expr *ax,
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int regnum);
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/* Segment selectors. */
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#define I386_SEL_RPL 0x0003 /* Requester's Privilege Level mask. */
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#define I386_SEL_UPL 0x0003 /* User Privilige Level. */
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#define I386_SEL_KPL 0x0000 /* Kernel Privilige Level. */
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/* The length of the longest i386 instruction (according to
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include/asm-i386/kprobes.h in Linux 2.6. */
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#define I386_MAX_INSN_LEN (16)
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/* Functions exported from i386-tdep.c. */
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extern CORE_ADDR i386_pe_skip_trampoline_code (struct frame_info *frame,
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CORE_ADDR pc, char *name);
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extern CORE_ADDR i386_skip_main_prologue (struct gdbarch *gdbarch,
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CORE_ADDR pc);
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/* Return whether the THIS_FRAME corresponds to a sigtramp routine. */
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extern int i386_sigtramp_p (struct frame_info *this_frame);
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/* Return non-zero if REGNUM is a member of the specified group. */
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extern int i386_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
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struct reggroup *group);
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/* Supply register REGNUM from the general-purpose register set REGSET
|
||
to register cache REGCACHE. If REGNUM is -1, do this for all
|
||
registers in REGSET. */
|
||
extern void i386_supply_gregset (const struct regset *regset,
|
||
struct regcache *regcache, int regnum,
|
||
const void *gregs, size_t len);
|
||
|
||
/* General-purpose register set. */
|
||
extern const struct regset i386_gregset;
|
||
|
||
/* Floating-point register set. */
|
||
extern const struct regset i386_fpregset;
|
||
|
||
/* Default iterator over core file register note sections. */
|
||
extern void
|
||
i386_iterate_over_regset_sections (struct gdbarch *gdbarch,
|
||
iterate_over_regset_sections_cb *cb,
|
||
void *cb_data,
|
||
const struct regcache *regcache);
|
||
|
||
typedef buf_displaced_step_closure i386_displaced_step_closure;
|
||
|
||
extern struct displaced_step_closure *i386_displaced_step_copy_insn
|
||
(struct gdbarch *gdbarch, CORE_ADDR from, CORE_ADDR to,
|
||
struct regcache *regs);
|
||
extern void i386_displaced_step_fixup (struct gdbarch *gdbarch,
|
||
struct displaced_step_closure *closure,
|
||
CORE_ADDR from, CORE_ADDR to,
|
||
struct regcache *regs);
|
||
|
||
/* Initialize a basic ELF architecture variant. */
|
||
extern void i386_elf_init_abi (struct gdbarch_info, struct gdbarch *);
|
||
|
||
/* Initialize a SVR4 architecture variant. */
|
||
extern void i386_svr4_init_abi (struct gdbarch_info, struct gdbarch *);
|
||
|
||
/* Convert SVR4 register number REG to the appropriate register number
|
||
used by GDB. */
|
||
extern int i386_svr4_reg_to_regnum (struct gdbarch *gdbarch, int reg);
|
||
|
||
extern int i386_process_record (struct gdbarch *gdbarch,
|
||
struct regcache *regcache, CORE_ADDR addr);
|
||
extern const struct target_desc *i386_target_description (uint64_t xcr0);
|
||
|
||
/* Return true iff the current target is MPX enabled. */
|
||
extern int i386_mpx_enabled (void);
|
||
|
||
|
||
/* Functions and variables exported from i386-bsd-tdep.c. */
|
||
|
||
extern void i386bsd_init_abi (struct gdbarch_info, struct gdbarch *);
|
||
extern CORE_ADDR i386fbsd_sigtramp_start_addr;
|
||
extern CORE_ADDR i386fbsd_sigtramp_end_addr;
|
||
extern CORE_ADDR i386obsd_sigtramp_start_addr;
|
||
extern CORE_ADDR i386obsd_sigtramp_end_addr;
|
||
extern int i386fbsd4_sc_reg_offset[];
|
||
extern int i386fbsd_sc_reg_offset[];
|
||
extern int i386nbsd_sc_reg_offset[];
|
||
extern int i386obsd_sc_reg_offset[];
|
||
extern int i386bsd_sc_reg_offset[];
|
||
|
||
/* SystemTap related functions. */
|
||
|
||
extern int i386_stap_is_single_operand (struct gdbarch *gdbarch,
|
||
const char *s);
|
||
|
||
extern int i386_stap_parse_special_token (struct gdbarch *gdbarch,
|
||
struct stap_parse_info *p);
|
||
|
||
#endif /* i386-tdep.h */
|