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225 lines
6.8 KiB
C
225 lines
6.8 KiB
C
/* Target-dependent code for the i386.
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Copyright 2001, 2002, 2003
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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 2 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, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef I386_TDEP_H
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#define I386_TDEP_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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/* 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, the FP0_REGNUM target macro
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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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struct regset *gregset;
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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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struct regset *fpregset;
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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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/* 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 SSE registers. */
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int num_xmm_regs;
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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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/* 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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};
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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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/* "Generic" floating point control register. */
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#define FPC_REGNUM (FP0_REGNUM + 8)
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/* FPU control word. */
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#define FCTRL_REGNUM FPC_REGNUM
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/* FPU status word. */
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#define FSTAT_REGNUM (FPC_REGNUM + 1)
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/* FPU register tag word. */
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#define FTAG_REGNUM (FPC_REGNUM + 2)
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/* FPU instruction's code segment selector, called "FPU Instruction
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Pointer Selector" in the IA-32 manuals. */
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#define FISEG_REGNUM (FPC_REGNUM + 3)
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/* FPU instruction's offset within segment. */
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#define FIOFF_REGNUM (FPC_REGNUM + 4)
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/* FPU operand's data segment. */
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#define FOSEG_REGNUM (FPC_REGNUM + 5)
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/* FPU operand's offset within segment */
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#define FOOFF_REGNUM (FPC_REGNUM + 6)
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/* FPU opcode, bottom eleven bits. */
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#define FOP_REGNUM (FPC_REGNUM + 7)
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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 (int regnum);
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extern int i386_fpc_regnum_p (int regnum);
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/* SSE registers. */
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/* First SSE data register. */
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#define XMM0_REGNUM (FPC_REGNUM + 8)
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/* SSE control/status register. */
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#define MXCSR_REGNUM \
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(XMM0_REGNUM + gdbarch_tdep (current_gdbarch)->num_xmm_regs)
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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_ST0_REGNUM = 16, /* %st(0) */
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};
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#define I386_NUM_GREGS 16
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#define I386_NUM_FREGS 16
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#define I386_NUM_XREGS 9
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#define I386_SSE_NUM_REGS (I386_NUM_GREGS + I386_NUM_FREGS \
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+ I386_NUM_XREGS)
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/* Size of the largest register. */
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#define I386_MAX_REGISTER_SIZE 16
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/* Functions exported from i386-tdep.c. */
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extern CORE_ADDR i386_pe_skip_trampoline_code (CORE_ADDR pc, char *name);
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extern int i386_frameless_signal_p (struct frame_info *frame);
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/* Return the name of register REG. */
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extern char const *i386_register_name (int reg);
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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
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to register cache REGCACHE. If REGNUM is -1, do this for all
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registers in REGSET. */
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extern void i386_supply_gregset (const struct regset *regset,
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struct regcache *regcache, int regnum,
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const void *gregs, size_t len);
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/* Return the appropriate register set for the core section identified
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by SECT_NAME and SECT_SIZE. */
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extern const struct regset *
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i386_regset_from_core_section (struct gdbarch *gdbarch,
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const char *sect_name, size_t sect_size);
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/* Initialize a basic ELF architecture variant. */
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extern void i386_elf_init_abi (struct gdbarch_info, struct gdbarch *);
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/* Initialize a SVR4 architecture variant. */
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extern void i386_svr4_init_abi (struct gdbarch_info, struct gdbarch *);
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/* Functions and variables exported from i386bsd-tdep.c. */
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extern void i386bsd_init_abi (struct gdbarch_info, struct gdbarch *);
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extern CORE_ADDR i386fbsd_sigtramp_start;
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extern CORE_ADDR i386fbsd_sigtramp_end;
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extern CORE_ADDR i386obsd_sigtramp_start;
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extern CORE_ADDR i386obsd_sigtramp_end;
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extern int i386fbsd4_sc_reg_offset[];
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extern int i386fbsd_sc_reg_offset[];
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extern int i386nbsd_sc_reg_offset[];
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extern int i386obsd_sc_reg_offset[];
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extern int i386bsd_sc_reg_offset[];
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#endif /* i386-tdep.h */
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