| |
| /*--------------------------------------------------------------------*/ |
| /*--- x86-specific stuff for the core. x86/core_arch.h ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of Valgrind, an extensible x86 protected-mode |
| emulator for monitoring program execution on x86-Unixes. |
| |
| Copyright (C) 2000-2004 Nicholas Nethercote |
| njn25@cam.ac.uk |
| |
| 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 (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 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. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| #ifndef __X86_CORE_ARCH_H |
| #define __X86_CORE_ARCH_H |
| |
| #include "core_arch_asm.h" // arch-specific asm stuff |
| #include "tool_arch.h" // arch-specific tool stuff |
| |
| #include "libvex_guest_x86.h" |
| |
| |
| /* --------------------------------------------------------------------- |
| Interesting registers |
| ------------------------------------------------------------------ */ |
| |
| // Accessors for the ThreadArchState |
| #define ARCH_INSTR_PTR(regs) ((regs).vex.guest_EIP) |
| #define ARCH_STACK_PTR(regs) ((regs).vex.guest_ESP) |
| #define ARCH_FRAME_PTR(regs) ((regs).vex.guest_EBP) |
| |
| #define ARCH_CLREQ_ARGS(regs) ((regs).vex.guest_EAX) |
| #define ARCH_PTHREQ_RET(regs) ((regs).vex.guest_EDX) |
| #define ARCH_CLREQ_RET(regs) ((regs).vex.guest_EDX) |
| |
| // Accessors for the baseBlock |
| #define R_STACK_PTR R_ESP |
| #define R_FRAME_PTR R_EBP |
| |
| #define R_CLREQ_RET R_EDX |
| #define R_PTHREQ_RET R_EDX |
| |
| // Stack frame layout and linkage |
| #define FIRST_STACK_FRAME(ebp) (ebp) |
| #define STACK_FRAME_RET(ebp) (((UInt*)ebp)[1]) |
| #define STACK_FRAME_NEXT(ebp) (((UInt*)ebp)[0]) |
| |
| // Get stack pointer and frame pointer |
| #define ARCH_GET_REAL_STACK_PTR(esp) do { \ |
| asm("movl %%esp, %0" : "=r" (esp)); \ |
| } while (0) |
| |
| #define ARCH_GET_REAL_FRAME_PTR(ebp) do { \ |
| asm("movl %%ebp, %0" : "=r" (ebp)); \ |
| } while (0) |
| |
| // So the dispatch loop can find %EIP |
| extern Int VGOFF_(m_eip); |
| |
| |
| /* --------------------------------------------------------------------- |
| Elf stuff |
| ------------------------------------------------------------------ */ |
| |
| #define VG_ELF_ENDIANNESS ELFDATA2LSB |
| #define VG_ELF_MACHINE EM_386 |
| #define VG_ELF_CLASS ELFCLASS32 |
| |
| |
| /* --------------------------------------------------------------------- |
| LDT type |
| ------------------------------------------------------------------ */ |
| |
| // XXX: eventually this will be x86-private, not seen by the core(?) |
| |
| /* This is the hardware-format for a segment descriptor, ie what the |
| x86 actually deals with. It is 8 bytes long. It's ugly. */ |
| |
| typedef struct _LDT_ENTRY { |
| union { |
| struct { |
| UShort LimitLow; |
| UShort BaseLow; |
| unsigned BaseMid : 8; |
| unsigned Type : 5; |
| unsigned Dpl : 2; |
| unsigned Pres : 1; |
| unsigned LimitHi : 4; |
| unsigned Sys : 1; |
| unsigned Reserved_0 : 1; |
| unsigned Default_Big : 1; |
| unsigned Granularity : 1; |
| unsigned BaseHi : 8; |
| } Bits; |
| struct { |
| UInt word1; |
| UInt word2; |
| } Words; |
| } |
| LdtEnt; |
| } VgLdtEntry; |
| |
| |
| /* --------------------------------------------------------------------- |
| Architecture-specific part of a ThreadState |
| ------------------------------------------------------------------ */ |
| |
| // Architecture-specific part of a ThreadState |
| // XXX: eventually this should be made abstract, ie. the fields not visible |
| // to the core... then VgLdtEntry can be made non-visible to the core |
| // also. |
| typedef |
| struct { |
| /* Pointer to this thread's Local (Segment) Descriptor Table. |
| Starts out as NULL, indicating there is no table, and we hope |
| to keep it that way. If the thread does __NR_modify_ldt to |
| create entries, we allocate a 8192-entry table at that point. |
| This is a straight copy of the Linux kernel's scheme. Don't |
| forget to deallocate this at thread exit. */ |
| VgLdtEntry* ldt; |
| |
| /* TLS table. This consists of a small number (currently 3) of |
| entries from the Global Descriptor Table. */ |
| VgLdtEntry tls[VKI_GDT_ENTRY_TLS_ENTRIES]; |
| |
| /* --- BEGIN vex-mandated guest state --- */ |
| |
| /* Saved machine context. */ |
| VexGuestX86State vex; |
| |
| /* Saved shadow context. */ |
| VexGuestX86State vex_shadow; |
| |
| /* Spill area. */ |
| UChar vex_spill[LibVEX_N_SPILL_BYTES]; |
| |
| /* --- END vex-mandated guest state --- */ |
| } |
| ThreadArchState; |
| |
| |
| /* --------------------------------------------------------------------- |
| libpthread stuff |
| ------------------------------------------------------------------ */ |
| |
| struct arch_thread_aux { |
| void* tls_data; |
| int tls_segment; |
| unsigned long sysinfo; |
| }; |
| |
| /* --------------------------------------------------------------------- |
| Miscellaneous constants |
| ------------------------------------------------------------------ */ |
| |
| // Total number of spill slots available for register allocation. |
| #define VG_MAX_SPILLSLOTS 100 |
| |
| // Valgrind's signal stack size, in words. |
| #define VG_SIGSTACK_SIZE_W 10000 |
| |
| // Base address of client address space. |
| #define CLIENT_BASE 0x00000000ul |
| |
| #endif // __X86_CORE_ARCH_H |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end ---*/ |
| /*--------------------------------------------------------------------*/ |