867 lines
35 KiB
C
867 lines
35 KiB
C
/*
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* Debugger i386 specific functions
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*
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* Copyright 2004 Eric Pouech
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "debugger.h"
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#include "wine/debug.h"
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#if defined(__i386__) || defined(__x86_64__)
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WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
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/* db_disasm.c */
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extern void be_i386_disasm_one_insn(ADDRESS64* addr, int display);
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#define STEP_FLAG 0x00000100 /* single step flag */
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#define V86_FLAG 0x00020000
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#define IS_VM86_MODE(ctx) (ctx->EFlags & V86_FLAG)
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static ADDRESS_MODE get_selector_type(HANDLE hThread, const WOW64_CONTEXT *ctx, WORD sel)
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{
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LDT_ENTRY le;
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if (IS_VM86_MODE(ctx)) return AddrModeReal;
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/* null or system selector */
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if (!(sel & 4) || ((sel >> 3) < 17)) return AddrModeFlat;
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if (dbg_curr_process->process_io->get_selector(hThread, sel, &le))
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return le.HighWord.Bits.Default_Big ? AddrMode1632 : AddrMode1616;
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/* selector doesn't exist */
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return -1;
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}
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static void* be_i386_linearize(HANDLE hThread, const ADDRESS64* addr)
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{
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LDT_ENTRY le;
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switch (addr->Mode)
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{
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case AddrModeReal:
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return (void*)((DWORD_PTR)(LOWORD(addr->Segment) << 4) + (DWORD_PTR)addr->Offset);
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case AddrMode1632:
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if (!(addr->Segment & 4) || ((addr->Segment >> 3) < 17))
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return (void*)(DWORD_PTR)addr->Offset;
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/* fall through */
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case AddrMode1616:
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if (!dbg_curr_process->process_io->get_selector(hThread, addr->Segment, &le)) return NULL;
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return (void*)((le.HighWord.Bits.BaseHi << 24) +
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(le.HighWord.Bits.BaseMid << 16) + le.BaseLow +
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(DWORD_PTR)addr->Offset);
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case AddrModeFlat:
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return (void*)(DWORD_PTR)addr->Offset;
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}
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return NULL;
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}
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static BOOL be_i386_build_addr(HANDLE hThread, const dbg_ctx_t *ctx, ADDRESS64* addr,
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unsigned seg, DWORD64 offset)
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{
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addr->Mode = AddrModeFlat;
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addr->Segment = seg;
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addr->Offset = offset;
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if (seg)
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{
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addr->Mode = get_selector_type(hThread, &ctx->x86, seg);
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switch (addr->Mode)
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{
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case AddrModeReal:
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case AddrMode1616:
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addr->Offset &= 0xffff;
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break;
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case AddrModeFlat:
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case AddrMode1632:
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break;
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default:
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addr->Mode = -1;
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return FALSE;
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}
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}
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return TRUE;
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}
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static BOOL be_i386_get_addr(HANDLE hThread, const dbg_ctx_t *ctx,
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enum be_cpu_addr bca, ADDRESS64* addr)
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{
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switch (bca)
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{
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case be_cpu_addr_pc:
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return be_i386_build_addr(hThread, ctx, addr, ctx->x86.SegCs, ctx->x86.Eip);
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case be_cpu_addr_stack:
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return be_i386_build_addr(hThread, ctx, addr, ctx->x86.SegSs, ctx->x86.Esp);
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case be_cpu_addr_frame:
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return be_i386_build_addr(hThread, ctx, addr, ctx->x86.SegSs, ctx->x86.Ebp);
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}
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return FALSE;
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}
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static BOOL be_i386_get_register_info(int regno, enum be_cpu_addr* kind)
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{
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switch (regno)
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{
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case CV_REG_EIP: *kind = be_cpu_addr_pc; return TRUE;
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case CV_REG_EBP: *kind = be_cpu_addr_frame; return TRUE;
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case CV_REG_ESP: *kind = be_cpu_addr_stack; return TRUE;
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}
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return FALSE;
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}
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static void be_i386_single_step(dbg_ctx_t *ctx, BOOL enable)
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{
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if (enable) ctx->x86.EFlags |= STEP_FLAG;
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else ctx->x86.EFlags &= ~STEP_FLAG;
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}
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static void be_i386_all_print_context(HANDLE hThread, const dbg_ctx_t *pctx)
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{
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static const char mxcsr_flags[16][4] = { "IE", "DE", "ZE", "OE", "UE", "PE", "DAZ", "IM",
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"DM", "ZM", "OM", "UM", "PM", "R-", "R+", "FZ" };
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const WOW64_CONTEXT *ctx = &pctx->x86;
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XSAVE_FORMAT *xmm_area;
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int cnt;
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/* Break out the FPU state and the floating point registers */
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dbg_printf("Floating Point Unit status:\n");
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dbg_printf(" FLCW:%04x ", LOWORD(ctx->FloatSave.ControlWord));
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dbg_printf(" FLTW:%04x ", LOWORD(ctx->FloatSave.TagWord));
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dbg_printf(" FLEO:%08x ", (unsigned int) ctx->FloatSave.ErrorOffset);
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dbg_printf(" FLSW:%04x", LOWORD(ctx->FloatSave.StatusWord));
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/* Isolate the condition code bits - note they are not contiguous */
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dbg_printf("(CC:%ld%ld%ld%ld", (ctx->FloatSave.StatusWord & 0x00004000) >> 14,
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(ctx->FloatSave.StatusWord & 0x00000400) >> 10,
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(ctx->FloatSave.StatusWord & 0x00000200) >> 9,
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(ctx->FloatSave.StatusWord & 0x00000100) >> 8);
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/* Now pull out the 3 bit of the TOP stack pointer */
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dbg_printf(" TOP:%01x", (unsigned int) (ctx->FloatSave.StatusWord & 0x00003800) >> 11);
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/* Lets analyse the error bits and indicate the status
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* the Invalid Op flag has sub status which is tested as follows */
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if (ctx->FloatSave.StatusWord & 0x00000001) { /* Invalid Fl OP */
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if (ctx->FloatSave.StatusWord & 0x00000040) { /* Stack Fault */
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if (ctx->FloatSave.StatusWord & 0x00000200) /* C1 says Overflow */
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dbg_printf(" #IE(Stack Overflow)");
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else
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dbg_printf(" #IE(Stack Underflow)"); /* Underflow */
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}
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else dbg_printf(" #IE(Arthimetic error)"); /* Invalid Fl OP */
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}
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if (ctx->FloatSave.StatusWord & 0x00000002) dbg_printf(" #DE"); /* Denormalised OP */
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if (ctx->FloatSave.StatusWord & 0x00000004) dbg_printf(" #ZE"); /* Zero Divide */
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if (ctx->FloatSave.StatusWord & 0x00000008) dbg_printf(" #OE"); /* Overflow */
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if (ctx->FloatSave.StatusWord & 0x00000010) dbg_printf(" #UE"); /* Underflow */
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if (ctx->FloatSave.StatusWord & 0x00000020) dbg_printf(" #PE"); /* Precision error */
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if (ctx->FloatSave.StatusWord & 0x00000040)
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if (!(ctx->FloatSave.StatusWord & 0x00000001))
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dbg_printf(" #SE"); /* Stack Fault (don't think this can occur) */
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if (ctx->FloatSave.StatusWord & 0x00000080) dbg_printf(" #ES"); /* Error Summary */
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if (ctx->FloatSave.StatusWord & 0x00008000) dbg_printf(" #FB"); /* FPU Busy */
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dbg_printf(")\n");
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/* Here are the rest of the registers */
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dbg_printf(" FLES:%08lx FLDO:%08lx FLDS:%08lx FLCNS:%08lx\n",
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ctx->FloatSave.ErrorSelector,
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ctx->FloatSave.DataOffset,
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ctx->FloatSave.DataSelector,
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ctx->FloatSave.Cr0NpxState);
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/* Now for the floating point registers */
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dbg_printf("Floating Point Registers:\n");
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for (cnt = 0; cnt < 8; cnt++)
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{
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const BYTE *p = &ctx->FloatSave.RegisterArea[cnt * 10];
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if (cnt == 4) dbg_printf("\n");
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dbg_printf(" ST%d:%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x ", cnt,
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p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], p[8], p[9] );
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}
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xmm_area = (XSAVE_FORMAT *) &ctx->ExtendedRegisters;
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dbg_printf(" mxcsr: %04lx (", xmm_area->MxCsr );
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for (cnt = 0; cnt < 16; cnt++)
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if (xmm_area->MxCsr & (1 << cnt)) dbg_printf( " %s", mxcsr_flags[cnt] );
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dbg_printf(" )\n");
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for (cnt = 0; cnt < 8; cnt++)
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{
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dbg_printf( " xmm%u: uint=%08x%08x%08x%08x", cnt,
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*((unsigned int *)&xmm_area->XmmRegisters[cnt] + 3),
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*((unsigned int *)&xmm_area->XmmRegisters[cnt] + 2),
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*((unsigned int *)&xmm_area->XmmRegisters[cnt] + 1),
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*((unsigned int *)&xmm_area->XmmRegisters[cnt] + 0));
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dbg_printf( " double={%g; %g}", *(double *)&xmm_area->XmmRegisters[cnt].Low,
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*(double *)&xmm_area->XmmRegisters[cnt].High );
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dbg_printf( " float={%g; %g; %g; %g}\n",
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(double)*((float *)&xmm_area->XmmRegisters[cnt] + 0),
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(double)*((float *)&xmm_area->XmmRegisters[cnt] + 1),
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(double)*((float *)&xmm_area->XmmRegisters[cnt] + 2),
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(double)*((float *)&xmm_area->XmmRegisters[cnt] + 3) );
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}
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dbg_printf("\n");
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}
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static void be_i386_print_context(HANDLE hThread, const dbg_ctx_t *pctx, int all_regs)
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{
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static const char flags[] = "aVR-N--ODITSZ-A-P-C";
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const WOW64_CONTEXT *ctx = &pctx->x86;
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int i;
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char buf[33];
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dbg_printf("Register dump:\n");
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/* First get the segment registers out of the way */
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dbg_printf(" CS:%04x SS:%04x DS:%04x ES:%04x FS:%04x GS:%04x",
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(WORD)ctx->SegCs, (WORD)ctx->SegSs,
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(WORD)ctx->SegDs, (WORD)ctx->SegEs,
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(WORD)ctx->SegFs, (WORD)ctx->SegGs);
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strcpy(buf, flags);
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for (i = 0; buf[i]; i++)
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if (buf[i] != '-' && !(ctx->EFlags & (1 << (sizeof(flags) - 2 - i))))
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buf[i] = ' ';
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switch (get_selector_type(hThread, ctx, ctx->SegCs))
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{
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case AddrMode1616:
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case AddrModeReal:
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dbg_printf("\n IP:%04x SP:%04x BP:%04x FLAGS:%04x(%s)\n",
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LOWORD(ctx->Eip), LOWORD(ctx->Esp),
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LOWORD(ctx->Ebp), LOWORD(ctx->EFlags), buf);
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dbg_printf(" AX:%04x BX:%04x CX:%04x DX:%04x SI:%04x DI:%04x\n",
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LOWORD(ctx->Eax), LOWORD(ctx->Ebx),
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LOWORD(ctx->Ecx), LOWORD(ctx->Edx),
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LOWORD(ctx->Esi), LOWORD(ctx->Edi));
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break;
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case AddrModeFlat:
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case AddrMode1632:
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dbg_printf("\n EIP:%08lx ESP:%08lx EBP:%08lx EFLAGS:%08lx(%s)\n",
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ctx->Eip, ctx->Esp, ctx->Ebp, ctx->EFlags, buf);
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dbg_printf(" EAX:%08lx EBX:%08lx ECX:%08lx EDX:%08lx\n",
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ctx->Eax, ctx->Ebx, ctx->Ecx, ctx->Edx);
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dbg_printf(" ESI:%08lx EDI:%08lx\n",
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ctx->Esi, ctx->Edi);
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break;
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}
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if (all_regs) be_i386_all_print_context(hThread, pctx);
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}
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static void be_i386_print_segment_info(HANDLE hThread, const dbg_ctx_t *ctx)
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{
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if (get_selector_type(hThread, &ctx->x86, ctx->x86.SegCs) == AddrMode1616)
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{
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info_win32_segments(ctx->x86.SegDs >> 3, 1);
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if (ctx->x86.SegEs != ctx->x86.SegDs)
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info_win32_segments(ctx->x86.SegEs >> 3, 1);
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}
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info_win32_segments(ctx->x86.SegFs >> 3, 1);
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}
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static struct dbg_internal_var be_i386_ctx[] =
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{
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{CV_REG_AL, "AL", (void*)FIELD_OFFSET(WOW64_CONTEXT, Eax), dbg_itype_unsigned_char_int},
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{CV_REG_CL, "CL", (void*)FIELD_OFFSET(WOW64_CONTEXT, Ecx), dbg_itype_unsigned_char_int},
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{CV_REG_DL, "DL", (void*)FIELD_OFFSET(WOW64_CONTEXT, Edx), dbg_itype_unsigned_char_int},
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{CV_REG_BL, "BL", (void*)FIELD_OFFSET(WOW64_CONTEXT, Ebx), dbg_itype_unsigned_char_int},
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{CV_REG_AH, "AH", (void*)(FIELD_OFFSET(WOW64_CONTEXT, Eax)+1), dbg_itype_unsigned_char_int},
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{CV_REG_CH, "CH", (void*)(FIELD_OFFSET(WOW64_CONTEXT, Ecx)+1), dbg_itype_unsigned_char_int},
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{CV_REG_DH, "DH", (void*)(FIELD_OFFSET(WOW64_CONTEXT, Edx)+1), dbg_itype_unsigned_char_int},
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{CV_REG_BH, "BH", (void*)(FIELD_OFFSET(WOW64_CONTEXT, Ebx)+1), dbg_itype_unsigned_char_int},
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{CV_REG_AX, "AX", (void*)FIELD_OFFSET(WOW64_CONTEXT, Eax), dbg_itype_unsigned_short_int},
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{CV_REG_CX, "CX", (void*)FIELD_OFFSET(WOW64_CONTEXT, Ecx), dbg_itype_unsigned_short_int},
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{CV_REG_DX, "DX", (void*)FIELD_OFFSET(WOW64_CONTEXT, Edx), dbg_itype_unsigned_short_int},
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{CV_REG_BX, "BX", (void*)FIELD_OFFSET(WOW64_CONTEXT, Ebx), dbg_itype_unsigned_short_int},
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{CV_REG_SP, "SP", (void*)FIELD_OFFSET(WOW64_CONTEXT, Esp), dbg_itype_unsigned_short_int},
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{CV_REG_BP, "BP", (void*)FIELD_OFFSET(WOW64_CONTEXT, Ebp), dbg_itype_unsigned_short_int},
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{CV_REG_SI, "SI", (void*)FIELD_OFFSET(WOW64_CONTEXT, Esi), dbg_itype_unsigned_short_int},
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{CV_REG_DI, "DI", (void*)FIELD_OFFSET(WOW64_CONTEXT, Edi), dbg_itype_unsigned_short_int},
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{CV_REG_EAX, "EAX", (void*)FIELD_OFFSET(WOW64_CONTEXT, Eax), dbg_itype_unsigned_int},
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{CV_REG_ECX, "ECX", (void*)FIELD_OFFSET(WOW64_CONTEXT, Ecx), dbg_itype_unsigned_int},
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{CV_REG_EDX, "EDX", (void*)FIELD_OFFSET(WOW64_CONTEXT, Edx), dbg_itype_unsigned_int},
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{CV_REG_EBX, "EBX", (void*)FIELD_OFFSET(WOW64_CONTEXT, Ebx), dbg_itype_unsigned_int},
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{CV_REG_ESP, "ESP", (void*)FIELD_OFFSET(WOW64_CONTEXT, Esp), dbg_itype_unsigned_int},
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{CV_REG_EBP, "EBP", (void*)FIELD_OFFSET(WOW64_CONTEXT, Ebp), dbg_itype_unsigned_int},
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{CV_REG_ESI, "ESI", (void*)FIELD_OFFSET(WOW64_CONTEXT, Esi), dbg_itype_unsigned_int},
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{CV_REG_EDI, "EDI", (void*)FIELD_OFFSET(WOW64_CONTEXT, Edi), dbg_itype_unsigned_int},
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{CV_REG_ES, "ES", (void*)FIELD_OFFSET(WOW64_CONTEXT, SegEs), dbg_itype_unsigned_short_int},
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{CV_REG_CS, "CS", (void*)FIELD_OFFSET(WOW64_CONTEXT, SegCs), dbg_itype_unsigned_short_int},
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{CV_REG_SS, "SS", (void*)FIELD_OFFSET(WOW64_CONTEXT, SegSs), dbg_itype_unsigned_short_int},
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{CV_REG_DS, "DS", (void*)FIELD_OFFSET(WOW64_CONTEXT, SegDs), dbg_itype_unsigned_short_int},
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{CV_REG_FS, "FS", (void*)FIELD_OFFSET(WOW64_CONTEXT, SegFs), dbg_itype_unsigned_short_int},
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{CV_REG_GS, "GS", (void*)FIELD_OFFSET(WOW64_CONTEXT, SegGs), dbg_itype_unsigned_short_int},
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{CV_REG_IP, "IP", (void*)FIELD_OFFSET(WOW64_CONTEXT, Eip), dbg_itype_unsigned_short_int},
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{CV_REG_FLAGS, "FLAGS", (void*)FIELD_OFFSET(WOW64_CONTEXT, EFlags), dbg_itype_unsigned_short_int},
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{CV_REG_EIP, "EIP", (void*)FIELD_OFFSET(WOW64_CONTEXT, Eip), dbg_itype_unsigned_int},
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{CV_REG_EFLAGS, "EFLAGS", (void*)FIELD_OFFSET(WOW64_CONTEXT, EFlags), dbg_itype_unsigned_int},
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{CV_REG_ST0, "ST0", (void*)FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[ 0]), dbg_itype_long_real},
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{CV_REG_ST0+1, "ST1", (void*)FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[10]), dbg_itype_long_real},
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{CV_REG_ST0+2, "ST2", (void*)FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[20]), dbg_itype_long_real},
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{CV_REG_ST0+3, "ST3", (void*)FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[30]), dbg_itype_long_real},
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{CV_REG_ST0+4, "ST4", (void*)FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[40]), dbg_itype_long_real},
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{CV_REG_ST0+5, "ST5", (void*)FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[50]), dbg_itype_long_real},
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{CV_REG_ST0+6, "ST6", (void*)FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[60]), dbg_itype_long_real},
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{CV_REG_ST0+7, "ST7", (void*)FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[70]), dbg_itype_long_real},
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{CV_AMD64_XMM0, "XMM0", (void*)(FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[0])), dbg_itype_m128a},
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{CV_AMD64_XMM0+1, "XMM1", (void*)(FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[1])), dbg_itype_m128a},
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{CV_AMD64_XMM0+2, "XMM2", (void*)(FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[2])), dbg_itype_m128a},
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{CV_AMD64_XMM0+3, "XMM3", (void*)(FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[3])), dbg_itype_m128a},
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{CV_AMD64_XMM0+4, "XMM4", (void*)(FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[4])), dbg_itype_m128a},
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{CV_AMD64_XMM0+5, "XMM5", (void*)(FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[5])), dbg_itype_m128a},
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{CV_AMD64_XMM0+6, "XMM6", (void*)(FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[6])), dbg_itype_m128a},
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{CV_AMD64_XMM0+7, "XMM7", (void*)(FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[7])), dbg_itype_m128a},
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{0, NULL, 0, dbg_itype_none}
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};
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static BOOL be_i386_is_step_over_insn(const void* insn)
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{
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BYTE ch;
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|
|
for (;;)
|
|
{
|
|
if (!dbg_read_memory(insn, &ch, sizeof(ch))) return FALSE;
|
|
|
|
switch (ch)
|
|
{
|
|
/* Skip all prefixes */
|
|
case 0x2e: /* cs: */
|
|
case 0x36: /* ss: */
|
|
case 0x3e: /* ds: */
|
|
case 0x26: /* es: */
|
|
case 0x64: /* fs: */
|
|
case 0x65: /* gs: */
|
|
case 0x66: /* opcode size prefix */
|
|
case 0x67: /* addr size prefix */
|
|
case 0xf0: /* lock */
|
|
case 0xf2: /* repne */
|
|
case 0xf3: /* repe */
|
|
insn = (const char*)insn + 1;
|
|
continue;
|
|
|
|
/* Handle call instructions */
|
|
case 0xcd: /* int <intno> */
|
|
case 0xe8: /* call <offset> */
|
|
case 0x9a: /* lcall <seg>:<off> */
|
|
return TRUE;
|
|
|
|
case 0xff: /* call <regmodrm> */
|
|
if (!dbg_read_memory((const char*)insn + 1, &ch, sizeof(ch)))
|
|
return FALSE;
|
|
return (((ch & 0x38) == 0x10) || ((ch & 0x38) == 0x18));
|
|
|
|
/* Handle string instructions */
|
|
case 0x6c: /* insb */
|
|
case 0x6d: /* insw */
|
|
case 0x6e: /* outsb */
|
|
case 0x6f: /* outsw */
|
|
case 0xa4: /* movsb */
|
|
case 0xa5: /* movsw */
|
|
case 0xa6: /* cmpsb */
|
|
case 0xa7: /* cmpsw */
|
|
case 0xaa: /* stosb */
|
|
case 0xab: /* stosw */
|
|
case 0xac: /* lodsb */
|
|
case 0xad: /* lodsw */
|
|
case 0xae: /* scasb */
|
|
case 0xaf: /* scasw */
|
|
return TRUE;
|
|
|
|
default:
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
static BOOL be_i386_is_function_return(const void* insn)
|
|
{
|
|
BYTE ch;
|
|
|
|
if (!dbg_read_memory(insn, &ch, sizeof(ch))) return FALSE;
|
|
if (ch == 0xF3) /* REP */
|
|
{
|
|
insn = (const char*)insn + 1;
|
|
if (!dbg_read_memory(insn, &ch, sizeof(ch))) return FALSE;
|
|
}
|
|
return (ch == 0xC2) || (ch == 0xC3);
|
|
}
|
|
|
|
static BOOL be_i386_is_break_insn(const void* insn)
|
|
{
|
|
BYTE c;
|
|
|
|
if (!dbg_read_memory(insn, &c, sizeof(c))) return FALSE;
|
|
return c == 0xCC;
|
|
}
|
|
|
|
static unsigned get_size(ADDRESS_MODE am)
|
|
{
|
|
if (am == AddrModeReal || am == AddrMode1616) return 16;
|
|
return 32;
|
|
}
|
|
|
|
static BOOL fetch_value(const char* addr, unsigned sz, int* value)
|
|
{
|
|
char value8;
|
|
short value16;
|
|
|
|
switch (sz)
|
|
{
|
|
case 8:
|
|
if (!dbg_read_memory(addr, &value8, sizeof(value8)))
|
|
return FALSE;
|
|
*value = value8;
|
|
break;
|
|
case 16:
|
|
if (!dbg_read_memory(addr, &value16, sizeof(value16)))
|
|
return FALSE;
|
|
*value = value16;
|
|
break;
|
|
case 32:
|
|
if (!dbg_read_memory(addr, value, sizeof(*value)))
|
|
return FALSE;
|
|
break;
|
|
default: return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static BOOL be_i386_is_func_call(const void* insn, ADDRESS64* callee)
|
|
{
|
|
BYTE ch;
|
|
int delta;
|
|
short segment;
|
|
unsigned dst = 0;
|
|
unsigned operand_size;
|
|
ADDRESS_MODE cs_addr_mode;
|
|
|
|
cs_addr_mode = get_selector_type(dbg_curr_thread->handle, &dbg_context.x86,
|
|
dbg_context.x86.SegCs);
|
|
operand_size = get_size(cs_addr_mode);
|
|
|
|
/* get operand_size (also getting rid of the various prefixes */
|
|
do
|
|
{
|
|
if (!dbg_read_memory(insn, &ch, sizeof(ch))) return FALSE;
|
|
if (ch == 0x66)
|
|
{
|
|
operand_size = 48 - operand_size; /* 16 => 32, 32 => 16 */
|
|
insn = (const char*)insn + 1;
|
|
}
|
|
} while (ch == 0x66 || ch == 0x67);
|
|
|
|
switch (ch)
|
|
{
|
|
case 0xe8: /* relative near call */
|
|
callee->Mode = cs_addr_mode;
|
|
if (!fetch_value((const char*)insn + 1, operand_size, &delta))
|
|
return FALSE;
|
|
callee->Segment = dbg_context.x86.SegCs;
|
|
callee->Offset = (DWORD_PTR)insn + 1 + (operand_size / 8) + delta;
|
|
return TRUE;
|
|
|
|
case 0x9a: /* absolute far call */
|
|
if (!dbg_read_memory((const char*)insn + 1 + operand_size / 8,
|
|
&segment, sizeof(segment)))
|
|
return FALSE;
|
|
callee->Mode = get_selector_type(dbg_curr_thread->handle, &dbg_context.x86,
|
|
segment);
|
|
if (!fetch_value((const char*)insn + 1, operand_size, &delta))
|
|
return FALSE;
|
|
callee->Segment = segment;
|
|
callee->Offset = delta;
|
|
return TRUE;
|
|
|
|
case 0xff:
|
|
if (!dbg_read_memory((const char*)insn + 1, &ch, sizeof(ch)))
|
|
return FALSE;
|
|
/* keep only the CALL and LCALL insn:s */
|
|
switch ((ch >> 3) & 0x07)
|
|
{
|
|
case 0x02:
|
|
segment = dbg_context.x86.SegCs;
|
|
break;
|
|
case 0x03:
|
|
if (!dbg_read_memory((const char*)insn + 1 + operand_size / 8,
|
|
&segment, sizeof(segment)))
|
|
return FALSE;
|
|
break;
|
|
default: return FALSE;
|
|
}
|
|
/* FIXME: we only support the 32 bit far calls for now */
|
|
if (operand_size != 32)
|
|
{
|
|
WINE_FIXME("Unsupported yet call insn (0xFF 0x%02x) with 16 bit operand-size at %p\n", ch, insn);
|
|
return FALSE;
|
|
}
|
|
switch (ch & 0xC7) /* keep Mod R/M only (skip reg) */
|
|
{
|
|
case 0x04:
|
|
case 0x44:
|
|
case 0x84:
|
|
WINE_FIXME("Unsupported yet call insn (0xFF 0x%02x) (SIB bytes) at %p\n", ch, insn);
|
|
return FALSE;
|
|
case 0x05: /* addr32 */
|
|
if ((ch & 0x38) == 0x10 || /* call */
|
|
(ch & 0x38) == 0x18) /* lcall */
|
|
{
|
|
void *addr;
|
|
if (!dbg_read_memory((const char *)insn + 2, &addr, sizeof(addr)))
|
|
return FALSE;
|
|
if ((ch & 0x38) == 0x18) /* lcall */
|
|
{
|
|
if (!dbg_read_memory((const char*)addr + operand_size, &segment, sizeof(segment)))
|
|
return FALSE;
|
|
}
|
|
else segment = dbg_context.x86.SegCs;
|
|
if (!dbg_read_memory((const char*)addr, &dst, sizeof(dst)))
|
|
return FALSE;
|
|
callee->Mode = get_selector_type(dbg_curr_thread->handle, &dbg_context.x86, segment);
|
|
callee->Segment = segment;
|
|
callee->Offset = dst;
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
default:
|
|
switch (ch & 0x07)
|
|
{
|
|
case 0x00: dst = dbg_context.x86.Eax; break;
|
|
case 0x01: dst = dbg_context.x86.Ecx; break;
|
|
case 0x02: dst = dbg_context.x86.Edx; break;
|
|
case 0x03: dst = dbg_context.x86.Ebx; break;
|
|
case 0x04: dst = dbg_context.x86.Esp; break;
|
|
case 0x05: dst = dbg_context.x86.Ebp; break;
|
|
case 0x06: dst = dbg_context.x86.Esi; break;
|
|
case 0x07: dst = dbg_context.x86.Edi; break;
|
|
}
|
|
if ((ch >> 6) != 0x03) /* indirect address */
|
|
{
|
|
if (ch >> 6) /* we got a displacement */
|
|
{
|
|
if (!fetch_value((const char*)insn + 2, (ch >> 6) == 0x01 ? 8 : 32, &delta))
|
|
return FALSE;
|
|
dst += delta;
|
|
}
|
|
if (((ch >> 3) & 0x07) == 0x03) /* LCALL */
|
|
{
|
|
if (!dbg_read_memory((const char*)(UINT_PTR)dst + operand_size, &segment, sizeof(segment)))
|
|
return FALSE;
|
|
}
|
|
else segment = dbg_context.x86.SegCs;
|
|
if (!dbg_read_memory((const char*)(UINT_PTR)dst, &delta, sizeof(delta)))
|
|
return FALSE;
|
|
callee->Mode = get_selector_type(dbg_curr_thread->handle, &dbg_context.x86,
|
|
segment);
|
|
callee->Segment = segment;
|
|
callee->Offset = delta;
|
|
}
|
|
else
|
|
{
|
|
callee->Mode = cs_addr_mode;
|
|
callee->Segment = dbg_context.x86.SegCs;
|
|
callee->Offset = dst;
|
|
}
|
|
}
|
|
return TRUE;
|
|
|
|
default:
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static BOOL be_i386_is_jump(const void* insn, ADDRESS64* jumpee)
|
|
{
|
|
BYTE ch;
|
|
int delta;
|
|
unsigned operand_size;
|
|
ADDRESS_MODE cs_addr_mode;
|
|
|
|
cs_addr_mode = get_selector_type(dbg_curr_thread->handle, &dbg_context.x86,
|
|
dbg_context.x86.SegCs);
|
|
operand_size = get_size(cs_addr_mode);
|
|
|
|
/* get operand_size (also getting rid of the various prefixes */
|
|
do
|
|
{
|
|
if (!dbg_read_memory(insn, &ch, sizeof(ch))) return FALSE;
|
|
if (ch == 0x66)
|
|
{
|
|
operand_size = 48 - operand_size; /* 16 => 32, 32 => 16 */
|
|
insn = (const char*)insn + 1;
|
|
}
|
|
} while (ch == 0x66 || ch == 0x67);
|
|
|
|
switch (ch)
|
|
{
|
|
case 0xe9: /* jmp near */
|
|
jumpee->Mode = cs_addr_mode;
|
|
if (!fetch_value((const char*)insn + 1, operand_size, &delta))
|
|
return FALSE;
|
|
jumpee->Segment = dbg_context.x86.SegCs;
|
|
jumpee->Offset = (DWORD_PTR)insn + 1 + (operand_size / 8) + delta;
|
|
return TRUE;
|
|
default: WINE_FIXME("unknown %x\n", ch); return FALSE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
#define DR7_CONTROL_SHIFT 16
|
|
#define DR7_CONTROL_SIZE 4
|
|
|
|
#define DR7_RW_EXECUTE (0x0)
|
|
#define DR7_RW_WRITE (0x1)
|
|
#define DR7_RW_READ (0x3)
|
|
|
|
#define DR7_LEN_1 (0x0)
|
|
#define DR7_LEN_2 (0x4)
|
|
#define DR7_LEN_4 (0xC)
|
|
|
|
#define DR7_LOCAL_ENABLE_SHIFT 0
|
|
#define DR7_GLOBAL_ENABLE_SHIFT 1
|
|
#define DR7_ENABLE_SIZE 2
|
|
|
|
#define DR7_LOCAL_ENABLE_MASK (0x55)
|
|
#define DR7_GLOBAL_ENABLE_MASK (0xAA)
|
|
|
|
#define DR7_CONTROL_RESERVED (0xFC00)
|
|
#define DR7_LOCAL_SLOWDOWN (0x100)
|
|
#define DR7_GLOBAL_SLOWDOWN (0x200)
|
|
|
|
#define DR7_ENABLE_MASK(dr) (1<<(DR7_LOCAL_ENABLE_SHIFT+DR7_ENABLE_SIZE*(dr)))
|
|
#define IS_DR7_SET(ctrl,dr) ((ctrl)&DR7_ENABLE_MASK(dr))
|
|
|
|
static inline int be_i386_get_unused_DR(dbg_ctx_t *pctx, DWORD** r)
|
|
{
|
|
WOW64_CONTEXT *ctx = &pctx->x86;
|
|
|
|
if (!IS_DR7_SET(ctx->Dr7, 0))
|
|
{
|
|
*r = &ctx->Dr0;
|
|
return 0;
|
|
}
|
|
if (!IS_DR7_SET(ctx->Dr7, 1))
|
|
{
|
|
*r = &ctx->Dr1;
|
|
return 1;
|
|
}
|
|
if (!IS_DR7_SET(ctx->Dr7, 2))
|
|
{
|
|
*r = &ctx->Dr2;
|
|
return 2;
|
|
}
|
|
if (!IS_DR7_SET(ctx->Dr7, 3))
|
|
{
|
|
*r = &ctx->Dr3;
|
|
return 3;
|
|
}
|
|
dbg_printf("All hardware registers have been used\n");
|
|
|
|
return -1;
|
|
}
|
|
|
|
static BOOL be_i386_insert_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
|
|
dbg_ctx_t *ctx, enum be_xpoint_type type,
|
|
void* addr, unsigned *val, unsigned size)
|
|
{
|
|
unsigned char ch;
|
|
SIZE_T sz;
|
|
DWORD *pr;
|
|
int reg;
|
|
unsigned int bits;
|
|
|
|
switch (type)
|
|
{
|
|
case be_xpoint_break:
|
|
if (size != 0) return FALSE;
|
|
if (!pio->read(hProcess, addr, &ch, 1, &sz) || sz != 1) return FALSE;
|
|
*val = ch;
|
|
ch = 0xcc;
|
|
if (!pio->write(hProcess, addr, &ch, 1, &sz) || sz != 1) return FALSE;
|
|
break;
|
|
case be_xpoint_watch_exec:
|
|
bits = DR7_RW_EXECUTE;
|
|
goto hw_bp;
|
|
case be_xpoint_watch_read:
|
|
bits = DR7_RW_READ;
|
|
goto hw_bp;
|
|
case be_xpoint_watch_write:
|
|
bits = DR7_RW_WRITE;
|
|
hw_bp:
|
|
if ((reg = be_i386_get_unused_DR(ctx, &pr)) == -1) return FALSE;
|
|
*pr = (DWORD_PTR)addr;
|
|
if (type != be_xpoint_watch_exec) switch (size)
|
|
{
|
|
case 4: bits |= DR7_LEN_4; break;
|
|
case 2: bits |= DR7_LEN_2; break;
|
|
case 1: bits |= DR7_LEN_1; break;
|
|
default: return FALSE;
|
|
}
|
|
*val = reg;
|
|
/* clear old values */
|
|
ctx->x86.Dr7 &= ~(0x0F << (DR7_CONTROL_SHIFT + DR7_CONTROL_SIZE * reg));
|
|
/* set the correct ones */
|
|
ctx->x86.Dr7 |= bits << (DR7_CONTROL_SHIFT + DR7_CONTROL_SIZE * reg);
|
|
ctx->x86.Dr7 |= DR7_ENABLE_MASK(reg) | DR7_LOCAL_SLOWDOWN;
|
|
break;
|
|
default:
|
|
dbg_printf("Unknown bp type %c\n", type);
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static BOOL be_i386_remove_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
|
|
dbg_ctx_t *ctx, enum be_xpoint_type type,
|
|
void* addr, unsigned val, unsigned size)
|
|
{
|
|
SIZE_T sz;
|
|
unsigned char ch;
|
|
|
|
switch (type)
|
|
{
|
|
case be_xpoint_break:
|
|
if (size != 0) return FALSE;
|
|
if (!pio->read(hProcess, addr, &ch, 1, &sz) || sz != 1) return FALSE;
|
|
if (ch != (unsigned char)0xCC)
|
|
WINE_FIXME("Cannot get back %02x instead of 0xCC at %p\n", ch, addr);
|
|
ch = (unsigned char)val;
|
|
if (!pio->write(hProcess, addr, &ch, 1, &sz) || sz != 1) return FALSE;
|
|
break;
|
|
case be_xpoint_watch_exec:
|
|
case be_xpoint_watch_read:
|
|
case be_xpoint_watch_write:
|
|
/* simply disable the entry */
|
|
ctx->x86.Dr7 &= ~DR7_ENABLE_MASK(val);
|
|
break;
|
|
default:
|
|
dbg_printf("Unknown bp type %c\n", type);
|
|
return FALSE;
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
static BOOL be_i386_is_watchpoint_set(const dbg_ctx_t *ctx, unsigned idx)
|
|
{
|
|
return ctx->x86.Dr6 & (1 << idx);
|
|
}
|
|
|
|
static void be_i386_clear_watchpoint(dbg_ctx_t *ctx, unsigned idx)
|
|
{
|
|
ctx->x86.Dr6 &= ~(1 << idx);
|
|
}
|
|
|
|
static int be_i386_adjust_pc_for_break(dbg_ctx_t *ctx, BOOL way)
|
|
{
|
|
if (way)
|
|
{
|
|
ctx->x86.Eip--;
|
|
return -1;
|
|
}
|
|
ctx->x86.Eip++;
|
|
return 1;
|
|
}
|
|
|
|
static BOOL be_i386_get_context(HANDLE thread, dbg_ctx_t *ctx)
|
|
{
|
|
ctx->x86.ContextFlags = WOW64_CONTEXT_ALL;
|
|
return Wow64GetThreadContext(thread, &ctx->x86);
|
|
}
|
|
|
|
static BOOL be_i386_set_context(HANDLE thread, const dbg_ctx_t *ctx)
|
|
{
|
|
return Wow64SetThreadContext(thread, &ctx->x86);
|
|
}
|
|
|
|
#define REG(f,n,t,r) {f, n, t, FIELD_OFFSET(WOW64_CONTEXT, r), sizeof(((WOW64_CONTEXT*)NULL)->r)}
|
|
|
|
static struct gdb_register be_i386_gdb_register_map[] = {
|
|
REG("core", "eax", NULL, Eax),
|
|
REG(NULL, "ecx", NULL, Ecx),
|
|
REG(NULL, "edx", NULL, Edx),
|
|
REG(NULL, "ebx", NULL, Ebx),
|
|
REG(NULL, "esp", "data_ptr", Esp),
|
|
REG(NULL, "ebp", "data_ptr", Ebp),
|
|
REG(NULL, "esi", NULL, Esi),
|
|
REG(NULL, "edi", NULL, Edi),
|
|
REG(NULL, "eip", "code_ptr", Eip),
|
|
REG(NULL, "eflags", "i386_eflags", EFlags),
|
|
REG(NULL, "cs", NULL, SegCs),
|
|
REG(NULL, "ss", NULL, SegSs),
|
|
REG(NULL, "ds", NULL, SegDs),
|
|
REG(NULL, "es", NULL, SegEs),
|
|
REG(NULL, "fs", NULL, SegFs),
|
|
REG(NULL, "gs", NULL, SegGs),
|
|
{ NULL, "st0", "i387_ext", FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[ 0]), 10},
|
|
{ NULL, "st1", "i387_ext", FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[10]), 10},
|
|
{ NULL, "st2", "i387_ext", FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[20]), 10},
|
|
{ NULL, "st3", "i387_ext", FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[30]), 10},
|
|
{ NULL, "st4", "i387_ext", FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[40]), 10},
|
|
{ NULL, "st5", "i387_ext", FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[50]), 10},
|
|
{ NULL, "st6", "i387_ext", FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[60]), 10},
|
|
{ NULL, "st7", "i387_ext", FIELD_OFFSET(WOW64_CONTEXT, FloatSave.RegisterArea[70]), 10},
|
|
{ NULL, "fctrl", NULL, FIELD_OFFSET(WOW64_CONTEXT, FloatSave.ControlWord), 2},
|
|
{ NULL, "fstat", NULL, FIELD_OFFSET(WOW64_CONTEXT, FloatSave.StatusWord), 2},
|
|
{ NULL, "ftag", NULL, FIELD_OFFSET(WOW64_CONTEXT, FloatSave.TagWord), 2},
|
|
{ NULL, "fiseg", NULL, FIELD_OFFSET(WOW64_CONTEXT, FloatSave.ErrorSelector), 2},
|
|
REG(NULL, "fioff", NULL, FloatSave.ErrorOffset),
|
|
{ NULL, "foseg", NULL, FIELD_OFFSET(WOW64_CONTEXT, FloatSave.DataSelector), 2},
|
|
REG(NULL, "fooff", NULL, FloatSave.DataOffset),
|
|
{ NULL, "fop", NULL, FIELD_OFFSET(WOW64_CONTEXT, FloatSave.ErrorSelector)+2, 2},
|
|
|
|
{ "sse", "xmm0", "vec128", FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[0]), 16},
|
|
{ NULL, "xmm1", "vec128", FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[1]), 16},
|
|
{ NULL, "xmm2", "vec128", FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[2]), 16},
|
|
{ NULL, "xmm3", "vec128", FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[3]), 16},
|
|
{ NULL, "xmm4", "vec128", FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[4]), 16},
|
|
{ NULL, "xmm5", "vec128", FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[5]), 16},
|
|
{ NULL, "xmm6", "vec128", FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[6]), 16},
|
|
{ NULL, "xmm7", "vec128", FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, XmmRegisters[7]), 16},
|
|
{ NULL, "mxcsr", "i386_mxcsr", FIELD_OFFSET(WOW64_CONTEXT, ExtendedRegisters) + FIELD_OFFSET(XSAVE_FORMAT, MxCsr), 4},
|
|
};
|
|
|
|
struct backend_cpu be_i386 =
|
|
{
|
|
IMAGE_FILE_MACHINE_I386,
|
|
4,
|
|
be_i386_linearize,
|
|
be_i386_build_addr,
|
|
be_i386_get_addr,
|
|
be_i386_get_register_info,
|
|
be_i386_single_step,
|
|
be_i386_print_context,
|
|
be_i386_print_segment_info,
|
|
be_i386_ctx,
|
|
be_i386_is_step_over_insn,
|
|
be_i386_is_function_return,
|
|
be_i386_is_break_insn,
|
|
be_i386_is_func_call,
|
|
be_i386_is_jump,
|
|
be_i386_disasm_one_insn,
|
|
be_i386_insert_Xpoint,
|
|
be_i386_remove_Xpoint,
|
|
be_i386_is_watchpoint_set,
|
|
be_i386_clear_watchpoint,
|
|
be_i386_adjust_pc_for_break,
|
|
be_i386_get_context,
|
|
be_i386_set_context,
|
|
be_i386_gdb_register_map,
|
|
ARRAY_SIZE(be_i386_gdb_register_map),
|
|
};
|
|
#endif
|