-/* Target-dependent code for GDB, the GNU debugger.
- Copyright 2001
- Free Software Foundation, Inc.
+/* Target-dependent code for the i386.
+
+ Copyright (C) 2001-2013 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef I386_TDEP_H
#define I386_TDEP_H
+struct frame_info;
+struct gdbarch;
+struct reggroup;
+struct regset;
+struct regcache;
+
/* GDB's i386 target supports both the 32-bit Intel Architecture
(IA-32) and the 64-bit AMD x86-64 architecture. Internally it uses
a similar register layout for both.
- SSE control register
The general purpose registers for the x86-64 architecture are quite
- different from IA-32. Therefore, the FP0_REGNUM target macro
+ different from IA-32. Therefore, gdbarch_fp0_regnum
determines the register number at which the FPU data registers
start. The number of FPU data and control registers is the same
for both architectures. The number of SSE registers however,
differs and is determined by the num_xmm_regs member of `struct
gdbarch_tdep'. */
+/* Convention for returning structures. */
+
+enum struct_return
+{
+ pcc_struct_return, /* Return "short" structures in memory. */
+ reg_struct_return /* Return "short" structures in registers. */
+};
+
+/* Register classes as defined in the AMD x86-64 psABI. */
+
+enum amd64_reg_class
+{
+ AMD64_INTEGER,
+ AMD64_SSE,
+ AMD64_SSEUP,
+ AMD64_X87,
+ AMD64_X87UP,
+ AMD64_COMPLEX_X87,
+ AMD64_NO_CLASS,
+ AMD64_MEMORY
+};
+
/* i386 architecture specific information. */
struct gdbarch_tdep
{
- /* OS/ABI. */
- int os_ident;
+ /* General-purpose registers. */
+ struct regset *gregset;
+ int *gregset_reg_offset;
+ int gregset_num_regs;
+ size_t sizeof_gregset;
+
+ /* The general-purpose registers used to pass integers when making
+ function calls. This only applies to amd64, as all parameters
+ are passed through the stack on x86. */
+ int call_dummy_num_integer_regs;
+ int *call_dummy_integer_regs;
+
+ /* Used on amd64 only. Classify TYPE according to calling conventions,
+ and store the result in CLASS. */
+ void (*classify) (struct type *type, enum amd64_reg_class class[2]);
+
+ /* Used on amd64 only. Non-zero if the first few MEMORY arguments
+ should be passed by pointer.
+
+ More precisely, MEMORY arguments are passed through the stack.
+ But certain architectures require that their address be passed
+ by register as well, if there are still some integer registers
+ available for argument passing. */
+ int memory_args_by_pointer;
+
+ /* Used on amd64 only.
+
+ If non-zero, then the callers of a function are expected to reserve
+ some space in the stack just before the area where the PC is saved
+ so that the callee may save the integer-parameter registers there.
+ The amount of space is dependent on the list of registers used for
+ integer parameter passing (see component call_dummy_num_integer_regs
+ above). */
+ int integer_param_regs_saved_in_caller_frame;
+
+ /* Floating-point registers. */
+ struct regset *fpregset;
+ size_t sizeof_fpregset;
+
+ /* XSAVE extended state. */
+ struct regset *xstateregset;
+
+ /* Register number for %st(0). The register numbers for the other
+ registers follow from this one. Set this to -1 to indicate the
+ absence of an FPU. */
+ int st0_regnum;
+
+ /* Number of MMX registers. */
+ int num_mmx_regs;
+
+ /* Register number for %mm0. Set this to -1 to indicate the absence
+ of MMX support. */
+ int mm0_regnum;
+
+ /* Number of pseudo YMM registers. */
+ int num_ymm_regs;
+
+ /* Register number for %ymm0. Set this to -1 to indicate the absence
+ of pseudo YMM register support. */
+ int ymm0_regnum;
+
+ /* Number of byte registers. */
+ int num_byte_regs;
+
+ /* Register pseudo number for %al. */
+ int al_regnum;
+
+ /* Number of pseudo word registers. */
+ int num_word_regs;
+
+ /* Register number for %ax. */
+ int ax_regnum;
+
+ /* Number of pseudo dword registers. */
+ int num_dword_regs;
+
+ /* Register number for %eax. Set this to -1 to indicate the absence
+ of pseudo dword register support. */
+ int eax_regnum;
+
+ /* Number of core registers. */
+ int num_core_regs;
/* Number of SSE registers. */
int num_xmm_regs;
+
+ /* Bits of the extended control register 0 (the XFEATURE_ENABLED_MASK
+ register), excluding the x87 bit, which are supported by this GDB. */
+
+ uint64_t xcr0;
+
+ /* Offset of XCR0 in XSAVE extended state. */
+ int xsave_xcr0_offset;
+
+ /* Register names. */
+ const char **register_names;
+
+ /* Register number for %ymm0h. Set this to -1 to indicate the absence
+ of upper YMM register support. */
+ int ymm0h_regnum;
+
+ /* Upper YMM register names. Only used for tdesc_numbered_register. */
+ const char **ymmh_register_names;
+
+ /* Target description. */
+ const struct target_desc *tdesc;
+
+ /* Register group function. */
+ const void *register_reggroup_p;
+
+ /* Offset of saved PC in jmp_buf. */
+ int jb_pc_offset;
+
+ /* Convention for returning structures. */
+ enum struct_return struct_return;
+
+ /* Address range where sigtramp lives. */
+ CORE_ADDR sigtramp_start;
+ CORE_ADDR sigtramp_end;
+
+ /* Detect sigtramp. */
+ int (*sigtramp_p) (struct frame_info *);
+
+ /* Get address of sigcontext for sigtramp. */
+ CORE_ADDR (*sigcontext_addr) (struct frame_info *);
+
+ /* Offset of registers in `struct sigcontext'. */
+ int *sc_reg_offset;
+ int sc_num_regs;
+
+ /* Offset of saved PC and SP in `struct sigcontext'. Usage of these
+ is deprecated, please use `sc_reg_offset' instead. */
+ int sc_pc_offset;
+ int sc_sp_offset;
+
+ /* ISA-specific data types. */
+ struct type *i386_mmx_type;
+ struct type *i386_ymm_type;
+ struct type *i387_ext_type;
+
+ /* Process record/replay target. */
+ /* The map for registers because the AMD64's registers order
+ in GDB is not same as I386 instructions. */
+ const int *record_regmap;
+ /* Parse intx80 args. */
+ int (*i386_intx80_record) (struct regcache *regcache);
+ /* Parse sysenter args. */
+ int (*i386_sysenter_record) (struct regcache *regcache);
+ /* Parse syscall args. */
+ int (*i386_syscall_record) (struct regcache *regcache);
};
/* Floating-point registers. */
-#define FPU_REG_RAW_SIZE 10
-
/* All FPU control regusters (except for FIOFF and FOOFF) are 16-bit
(at most) in the FPU, but are zero-extended to 32 bits in GDB's
register cache. */
-/* "Generic" floating point control register. */
-#define FPC_REGNUM (FP0_REGNUM + 8)
+/* Return non-zero if REGNUM matches the FP register and the FP
+ register set is active. */
+extern int i386_fp_regnum_p (struct gdbarch *, int);
+extern int i386_fpc_regnum_p (struct gdbarch *, int);
+
+/* Register numbers of various important registers. */
+
+enum i386_regnum
+{
+ I386_EAX_REGNUM, /* %eax */
+ I386_ECX_REGNUM, /* %ecx */
+ I386_EDX_REGNUM, /* %edx */
+ I386_EBX_REGNUM, /* %ebx */
+ I386_ESP_REGNUM, /* %esp */
+ I386_EBP_REGNUM, /* %ebp */
+ I386_ESI_REGNUM, /* %esi */
+ I386_EDI_REGNUM, /* %edi */
+ I386_EIP_REGNUM, /* %eip */
+ I386_EFLAGS_REGNUM, /* %eflags */
+ I386_CS_REGNUM, /* %cs */
+ I386_SS_REGNUM, /* %ss */
+ I386_DS_REGNUM, /* %ds */
+ I386_ES_REGNUM, /* %es */
+ I386_FS_REGNUM, /* %fs */
+ I386_GS_REGNUM, /* %gs */
+ I386_ST0_REGNUM, /* %st(0) */
+ I386_MXCSR_REGNUM = 40, /* %mxcsr */
+ I386_YMM0H_REGNUM, /* %ymm0h */
+ I386_YMM7H_REGNUM = I386_YMM0H_REGNUM + 7
+};
+
+/* Register numbers of RECORD_REGMAP. */
+
+enum record_i386_regnum
+{
+ X86_RECORD_REAX_REGNUM,
+ X86_RECORD_RECX_REGNUM,
+ X86_RECORD_REDX_REGNUM,
+ X86_RECORD_REBX_REGNUM,
+ X86_RECORD_RESP_REGNUM,
+ X86_RECORD_REBP_REGNUM,
+ X86_RECORD_RESI_REGNUM,
+ X86_RECORD_REDI_REGNUM,
+ X86_RECORD_R8_REGNUM,
+ X86_RECORD_R9_REGNUM,
+ X86_RECORD_R10_REGNUM,
+ X86_RECORD_R11_REGNUM,
+ X86_RECORD_R12_REGNUM,
+ X86_RECORD_R13_REGNUM,
+ X86_RECORD_R14_REGNUM,
+ X86_RECORD_R15_REGNUM,
+ X86_RECORD_REIP_REGNUM,
+ X86_RECORD_EFLAGS_REGNUM,
+ X86_RECORD_CS_REGNUM,
+ X86_RECORD_SS_REGNUM,
+ X86_RECORD_DS_REGNUM,
+ X86_RECORD_ES_REGNUM,
+ X86_RECORD_FS_REGNUM,
+ X86_RECORD_GS_REGNUM,
+};
+
+#define I386_NUM_GREGS 16
+#define I386_NUM_XREGS 9
+
+#define I386_SSE_NUM_REGS (I386_MXCSR_REGNUM + 1)
+#define I386_AVX_NUM_REGS (I386_YMM7H_REGNUM + 1)
+
+/* Size of the largest register. */
+#define I386_MAX_REGISTER_SIZE 16
+
+/* Types for i386-specific registers. */
+extern struct type *i387_ext_type (struct gdbarch *gdbarch);
+
+/* Checks of different pseudo-registers. */
+extern int i386_byte_regnum_p (struct gdbarch *gdbarch, int regnum);
+extern int i386_word_regnum_p (struct gdbarch *gdbarch, int regnum);
+extern int i386_dword_regnum_p (struct gdbarch *gdbarch, int regnum);
+extern int i386_xmm_regnum_p (struct gdbarch *gdbarch, int regnum);
+extern int i386_ymm_regnum_p (struct gdbarch *gdbarch, int regnum);
+
+extern const char *i386_pseudo_register_name (struct gdbarch *gdbarch,
+ int regnum);
+extern struct type *i386_pseudo_register_type (struct gdbarch *gdbarch,
+ int regnum);
+
+extern void i386_pseudo_register_read_into_value (struct gdbarch *gdbarch,
+ struct regcache *regcache,
+ int regnum,
+ struct value *result);
+
+extern void i386_pseudo_register_write (struct gdbarch *gdbarch,
+ struct regcache *regcache,
+ int regnum, const gdb_byte *buf);
+
+/* Segment selectors. */
+#define I386_SEL_RPL 0x0003 /* Requester's Privilege Level mask. */
+#define I386_SEL_UPL 0x0003 /* User Privilige Level. */
+#define I386_SEL_KPL 0x0000 /* Kernel Privilige Level. */
+
+/* The length of the longest i386 instruction (according to
+ include/asm-i386/kprobes.h in Linux 2.6. */
+#define I386_MAX_INSN_LEN (16)
+
+/* Functions exported from i386-tdep.c. */
+extern CORE_ADDR i386_pe_skip_trampoline_code (struct frame_info *frame,
+ CORE_ADDR pc, char *name);
+extern CORE_ADDR i386_skip_main_prologue (struct gdbarch *gdbarch,
+ CORE_ADDR pc);
+
+/* Return whether the THIS_FRAME corresponds to a sigtramp routine. */
+extern int i386_sigtramp_p (struct frame_info *this_frame);
-/* FPU control word. */
-#define FCTRL_REGNUM FPC_REGNUM
+/* Return non-zero if REGNUM is a member of the specified group. */
+extern int i386_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
+ struct reggroup *group);
-/* FPU status word. */
-#define FSTAT_REGNUM (FPC_REGNUM + 1)
+/* 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);
-/* FPU register tag word. */
-#define FTAG_REGNUM (FPC_REGNUM + 2)
+/* Collect register REGNUM from the register cache REGCACHE and store
+ it in the buffer specified by GREGS and LEN as described by the
+ general-purpose register set REGSET. If REGNUM is -1, do this for
+ all registers in REGSET. */
+extern void i386_collect_gregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len);
-/* FPU instruction's code segment selector, called "FPU Instruction
- Pointer Selector" in the IA-32 manuals. */
-#define FISEG_REGNUM (FPC_REGNUM + 3)
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
+extern const struct regset *
+ i386_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name, size_t sect_size);
-/* FPU instruction's offset within segment. */
-#define FIOFF_REGNUM (FPC_REGNUM + 4)
-/* FPU operand's data segment. */
-#define FOSEG_REGNUM (FPC_REGNUM + 5)
+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);
-/* FPU operand's offset within segment */
-#define FOOFF_REGNUM (FPC_REGNUM + 6)
+/* Initialize a basic ELF architecture variant. */
+extern void i386_elf_init_abi (struct gdbarch_info, struct gdbarch *);
-/* FPU opcode, bottom eleven bits. */
-#define FOP_REGNUM (FPC_REGNUM + 7)
+/* Initialize a SVR4 architecture variant. */
+extern void i386_svr4_init_abi (struct gdbarch_info, struct gdbarch *);
-/* Return non-zero if N corresponds to a FPU data registers. */
-#define FP_REGNUM_P(n) (FP0_REGNUM <= (n) && (n) < FPC_REGNUM)
+extern int i386_process_record (struct gdbarch *gdbarch,
+ struct regcache *regcache, CORE_ADDR addr);
-/* Return non-zero if N corresponds to a FPU control register. */
-#define FPC_REGNUM_P(n) (FPC_REGNUM <= (n) && (n) < XMM0_REGNUM)
+\f
-/* SSE registers. */
+/* Functions and variables exported from i386bsd-tdep.c. */
-/* First SSE data register. */
-#define XMM0_REGNUM (FPC_REGNUM + 8)
+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[];
-/* SSE control/status register. */
-#define MXCSR_REGNUM \
- (XMM0_REGNUM + gdbarch_tdep (current_gdbarch)->num_xmm_regs)
+/* SystemTap related functions. */
-/* Return non-zero if N corresponds to a SSE data register. */
-#define SSE_REGNUM_P(n) (XMM0_REGNUM <= (n) && (n) < MXCSR_REGNUM)
+extern int i386_stap_is_single_operand (struct gdbarch *gdbarch,
+ const char *s);
-/* FIXME: kettenis/2001-11-24: Obsolete macro's. */
-#define FCS_REGNUM FISEG_REGNUM
-#define FCOFF_REGNUM FIOFF_REGNUM
-#define FDS_REGNUM FOSEG_REGNUM
-#define FDOFF_REGNUM FOOFF_REGNUM
-#define IS_FP_REGNUM(n) FP_REGNUM_P (n)
-#define IS_FPU_CTRL_REGNUM(n) FPC_REGNUM_P (n)
-#define IS_SSE_REGNUM(n) SSE_REGNUM_P (n)
+extern int i386_stap_parse_special_token (struct gdbarch *gdbarch,
+ struct stap_parse_info *p);
#endif /* i386-tdep.h */