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wine/programs/winedbg/be_x86_64.c

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/*
* Debugger x86_64 specific functions
*
* Copyright 2004 Vincent Béron
* Copyright 2009 Eric Pouech
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "debugger.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
#if defined(__x86_64__)
#define STEP_FLAG 0x00000100 /* single step flag */
static unsigned be_x86_64_get_addr(HANDLE hThread, const CONTEXT* ctx,
enum be_cpu_addr bca, ADDRESS64* addr)
{
addr->Mode = AddrModeFlat;
switch (bca)
{
case be_cpu_addr_pc:
addr->Segment = ctx->SegCs;
addr->Offset = ctx->Rip;
return TRUE;
case be_cpu_addr_stack:
addr->Segment = ctx->SegSs;
addr->Offset = ctx->Rsp;
return TRUE;
case be_cpu_addr_frame:
addr->Segment = ctx->SegSs;
addr->Offset = ctx->Rbp;
return TRUE;
default:
addr->Mode = -1;
return FALSE;
}
}
static unsigned be_x86_64_get_register_info(int regno, enum be_cpu_addr* kind)
{
/* this is true when running in 32bit mode... and wrong in 64 :-/ */
switch (regno)
{
case CV_AMD64_RIP: *kind = be_cpu_addr_pc; return TRUE;
case CV_AMD64_EBP: *kind = be_cpu_addr_frame; return TRUE;
case CV_AMD64_ESP: *kind = be_cpu_addr_stack; return TRUE;
}
return FALSE;
}
static void be_x86_64_single_step(CONTEXT* ctx, unsigned enable)
{
if (enable) ctx->EFlags |= STEP_FLAG;
else ctx->EFlags &= ~STEP_FLAG;
}
static void be_x86_64_print_context(HANDLE hThread, const CONTEXT* ctx,
int all_regs)
{
static const char mxcsr_flags[16][4] = { "IE", "DE", "ZE", "OE", "UE", "PE", "DAZ", "IM",
"DM", "ZM", "OM", "UM", "PM", "R-", "R+", "FZ" };
static const char flags[] = "aVR-N--ODITSZ-A-P-C";
char buf[33];
int i;
strcpy(buf, flags);
for (i = 0; buf[i]; i++)
if (buf[i] != '-' && !(ctx->EFlags & (1 << (sizeof(flags) - 2 - i))))
buf[i] = ' ';
dbg_printf("Register dump:\n");
dbg_printf(" rip:%016lx rsp:%016lx rbp:%016lx eflags:%08x (%s)\n",
ctx->Rip, ctx->Rsp, ctx->Rbp, ctx->EFlags, buf);
dbg_printf(" rax:%016lx rbx:%016lx rcx:%016lx rdx:%016lx\n",
ctx->Rax, ctx->Rbx, ctx->Rcx, ctx->Rdx);
dbg_printf(" rsi:%016lx rdi:%016lx r8:%016lx r9:%016lx r10:%016lx\n",
ctx->Rsi, ctx->Rdi, ctx->R8, ctx->R9, ctx->R10 );
dbg_printf(" r11:%016lx r12:%016lx r13:%016lx r14:%016lx r15:%016lx\n",
ctx->R11, ctx->R12, ctx->R13, ctx->R14, ctx->R15 );
if (!all_regs) return;
dbg_printf(" cs:%04x ds:%04x es:%04x fs:%04x gs:%04x ss:%04x\n",
ctx->SegCs, ctx->SegDs, ctx->SegEs, ctx->SegFs, ctx->SegGs, ctx->SegSs );
dbg_printf("Debug:\n");
dbg_printf(" dr0:%016lx dr1:%016lx dr2:%016lx dr3:%016lx\n",
ctx->Dr0, ctx->Dr1, ctx->Dr2, ctx->Dr3 );
dbg_printf(" dr6:%016lx dr7:%016lx\n", ctx->Dr6, ctx->Dr7 );
dbg_printf("Floating point:\n");
dbg_printf(" flcw:%04x ", LOWORD(ctx->u.FltSave.ControlWord));
dbg_printf(" fltw:%04x ", LOWORD(ctx->u.FltSave.TagWord));
dbg_printf(" flsw:%04x", LOWORD(ctx->u.FltSave.StatusWord));
dbg_printf("(cc:%d%d%d%d", (ctx->u.FltSave.StatusWord & 0x00004000) >> 14,
(ctx->u.FltSave.StatusWord & 0x00000400) >> 10,
(ctx->u.FltSave.StatusWord & 0x00000200) >> 9,
(ctx->u.FltSave.StatusWord & 0x00000100) >> 8);
dbg_printf(" top:%01x", (unsigned int) (ctx->u.FltSave.StatusWord & 0x00003800) >> 11);
if (ctx->u.FltSave.StatusWord & 0x00000001) /* Invalid Fl OP */
{
if (ctx->u.FltSave.StatusWord & 0x00000040) /* Stack Fault */
{
if (ctx->u.FltSave.StatusWord & 0x00000200) /* C1 says Overflow */
dbg_printf(" #IE(Stack Overflow)");
else
dbg_printf(" #IE(Stack Underflow)"); /* Underflow */
}
else dbg_printf(" #IE(Arithmetic error)"); /* Invalid Fl OP */
}
if (ctx->u.FltSave.StatusWord & 0x00000002) dbg_printf(" #DE"); /* Denormalised OP */
if (ctx->u.FltSave.StatusWord & 0x00000004) dbg_printf(" #ZE"); /* Zero Divide */
if (ctx->u.FltSave.StatusWord & 0x00000008) dbg_printf(" #OE"); /* Overflow */
if (ctx->u.FltSave.StatusWord & 0x00000010) dbg_printf(" #UE"); /* Underflow */
if (ctx->u.FltSave.StatusWord & 0x00000020) dbg_printf(" #PE"); /* Precision error */
if (ctx->u.FltSave.StatusWord & 0x00000040)
if (!(ctx->u.FltSave.StatusWord & 0x00000001))
dbg_printf(" #SE"); /* Stack Fault (don't think this can occur) */
if (ctx->u.FltSave.StatusWord & 0x00000080) dbg_printf(" #ES"); /* Error Summary */
if (ctx->u.FltSave.StatusWord & 0x00008000) dbg_printf(" #FB"); /* FPU Busy */
dbg_printf(")\n");
dbg_printf(" flerr:%04x:%08x fldata:%04x:%08x\n",
ctx->u.FltSave.ErrorSelector, ctx->u.FltSave.ErrorOffset,
ctx->u.FltSave.DataSelector, ctx->u.FltSave.DataOffset );
for (i = 0; i < 4; i++)
{
long double st;
memcpy(&st, &ctx->u.FltSave.FloatRegisters[i * 10], 10);
dbg_printf(" st%u:%-16Lg ", i, st);
}
dbg_printf("\n");
for (i = 4; i < 8; i++)
{
long double st;
memcpy(&st, &ctx->u.FltSave.FloatRegisters[i * 10], 10);
dbg_printf(" st%u:%-16Lg ", i, st);
}
dbg_printf("\n");
dbg_printf(" mxcsr: %04x (", ctx->u.FltSave.MxCsr );
for (i = 0; i < 16; i++)
if (ctx->u.FltSave.MxCsr & (1 << i)) dbg_printf( " %s", mxcsr_flags[i] );
dbg_printf(" )\n");
for (i = 0; i < 16; i++)
{
dbg_printf( " %sxmm%u: uint=%016lx%016lx", (i > 9) ? "" : " ", i,
ctx->u.FltSave.XmmRegisters[i].High, ctx->u.FltSave.XmmRegisters[i].Low );
dbg_printf( " double={%g; %g}", *(double *)&ctx->u.FltSave.XmmRegisters[i].Low,
*(double *)&ctx->u.FltSave.XmmRegisters[i].High );
dbg_printf( " float={%g; %g; %g; %g}\n",
(double)*((float *)&ctx->u.FltSave.XmmRegisters[i] + 0),
(double)*((float *)&ctx->u.FltSave.XmmRegisters[i] + 1),
(double)*((float *)&ctx->u.FltSave.XmmRegisters[i] + 2),
(double)*((float *)&ctx->u.FltSave.XmmRegisters[i] + 3) );
}
}
static void be_x86_64_print_segment_info(HANDLE hThread, const CONTEXT* ctx)
{
}
static struct dbg_internal_var be_x86_64_ctx[] =
{
{CV_AMD64_AL, "AL", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rax), dbg_itype_unsigned_char_int},
{CV_AMD64_BL, "BL", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rbx), dbg_itype_unsigned_char_int},
{CV_AMD64_CL, "CL", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rcx), dbg_itype_unsigned_char_int},
{CV_AMD64_DL, "DL", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rdx), dbg_itype_unsigned_char_int},
{CV_AMD64_AH, "AH", (DWORD_PTR*)(FIELD_OFFSET(CONTEXT, Rax)+1), dbg_itype_unsigned_char_int},
{CV_AMD64_BH, "BH", (DWORD_PTR*)(FIELD_OFFSET(CONTEXT, Rbx)+1), dbg_itype_unsigned_char_int},
{CV_AMD64_CH, "CH", (DWORD_PTR*)(FIELD_OFFSET(CONTEXT, Rcx)+1), dbg_itype_unsigned_char_int},
{CV_AMD64_DH, "DH", (DWORD_PTR*)(FIELD_OFFSET(CONTEXT, Rdx)+1), dbg_itype_unsigned_char_int},
{CV_AMD64_AX, "AX", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rax), dbg_itype_unsigned_short_int},
{CV_AMD64_BX, "BX", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rbx), dbg_itype_unsigned_short_int},
{CV_AMD64_CX, "CX", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rcx), dbg_itype_unsigned_short_int},
{CV_AMD64_DX, "DX", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rdx), dbg_itype_unsigned_short_int},
{CV_AMD64_SP, "SP", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rsp), dbg_itype_unsigned_short_int},
{CV_AMD64_BP, "BP", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rbp), dbg_itype_unsigned_short_int},
{CV_AMD64_SI, "SI", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rsi), dbg_itype_unsigned_short_int},
{CV_AMD64_DI, "DI", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rdi), dbg_itype_unsigned_short_int},
{CV_AMD64_EAX, "EAX", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rax), dbg_itype_unsigned_int},
{CV_AMD64_EBX, "EBX", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rbx), dbg_itype_unsigned_int},
{CV_AMD64_ECX, "ECX", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rcx), dbg_itype_unsigned_int},
{CV_AMD64_EDX, "EDX", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rdx), dbg_itype_unsigned_int},
{CV_AMD64_ESP, "ESP", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rsp), dbg_itype_unsigned_int},
{CV_AMD64_EBP, "EBP", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rbp), dbg_itype_unsigned_int},
{CV_AMD64_ESI, "ESI", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rsi), dbg_itype_unsigned_int},
{CV_AMD64_EDI, "EDI", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rdi), dbg_itype_unsigned_int},
{CV_AMD64_ES, "ES", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, SegEs), dbg_itype_unsigned_short_int},
{CV_AMD64_CS, "CS", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, SegCs), dbg_itype_unsigned_short_int},
{CV_AMD64_SS, "SS", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, SegSs), dbg_itype_unsigned_short_int},
{CV_AMD64_DS, "DS", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, SegDs), dbg_itype_unsigned_short_int},
{CV_AMD64_FS, "FS", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, SegFs), dbg_itype_unsigned_short_int},
{CV_AMD64_GS, "GS", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, SegGs), dbg_itype_unsigned_short_int},
{CV_AMD64_FLAGS, "FLAGS", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, EFlags), dbg_itype_unsigned_short_int},
{CV_AMD64_EFLAGS, "EFLAGS", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, EFlags), dbg_itype_unsigned_int},
{CV_AMD64_RIP, "RIP", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rip), dbg_itype_unsigned_long_int},
{CV_AMD64_RAX, "RAX", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rax), dbg_itype_unsigned_long_int},
{CV_AMD64_RBX, "RBX", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rbx), dbg_itype_unsigned_long_int},
{CV_AMD64_RCX, "RCX", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rcx), dbg_itype_unsigned_long_int},
{CV_AMD64_RDX, "RDX", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rdx), dbg_itype_unsigned_long_int},
{CV_AMD64_RSP, "RSP", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rsp), dbg_itype_unsigned_long_int},
{CV_AMD64_RBP, "RBP", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rbp), dbg_itype_unsigned_long_int},
{CV_AMD64_RSI, "RSI", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rsi), dbg_itype_unsigned_long_int},
{CV_AMD64_RDI, "RDI", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, Rdi), dbg_itype_unsigned_long_int},
{CV_AMD64_R8, "R8", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R8), dbg_itype_unsigned_long_int},
{CV_AMD64_R9, "R9", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R9), dbg_itype_unsigned_long_int},
{CV_AMD64_R10, "R10", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R10), dbg_itype_unsigned_long_int},
{CV_AMD64_R11, "R11", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R11), dbg_itype_unsigned_long_int},
{CV_AMD64_R12, "R12", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R12), dbg_itype_unsigned_long_int},
{CV_AMD64_R13, "R13", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R13), dbg_itype_unsigned_long_int},
{CV_AMD64_R14, "R14", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R14), dbg_itype_unsigned_long_int},
{CV_AMD64_R15, "R15", (DWORD_PTR*)FIELD_OFFSET(CONTEXT, R15), dbg_itype_unsigned_long_int},
{0, NULL, 0, dbg_itype_none}
};
#define f_mod(b) ((b)>>6)
#define f_reg(b) (((b)>>3)&0x7)
#define f_rm(b) ((b)&0x7)
static unsigned be_x86_64_is_step_over_insn(const void* insn)
{
BYTE ch;
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 unsigned be_x86_64_is_function_return(const void* insn)
{
BYTE c;
return dbg_read_memory(insn, &c, sizeof(c)) && ((c == 0xC2) || (c == 0xC3));
}
static unsigned be_x86_64_is_break_insn(const void* insn)
{
BYTE c;
return dbg_read_memory(insn, &c, sizeof(c)) && c == 0xCC;
}
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;
case 32:
if (!dbg_read_memory(addr, value, sizeof(*value))) return FALSE;
break;
default: return FALSE;
}
return TRUE;
}
static unsigned be_x86_64_is_func_call(const void* insn, ADDRESS64* callee)
{
BYTE ch;
LONG delta;
short segment;
unsigned op_size = 32, rex = 0;
DWORD64 dst;
/* we assume 64bit mode all over the place */
for (;;)
{
if (!dbg_read_memory(insn, &ch, sizeof(ch))) return FALSE;
if (ch == 0x66) op_size = 16;
else if (ch == 0x67) WINE_FIXME("prefix not supported %x\n", ch);
else if (ch >= 0x40 && ch <= 0x4f) rex = ch & 0xf;
else break;
insn = (const char*)insn + 1;
} while (0);
/* that's the only mode we support anyway */
callee->Mode = AddrModeFlat;
callee->Segment = dbg_context.SegCs;
switch (ch)
{
case 0xe8: /* relative near call */
assert(op_size == 32);
if (!fetch_value((const char*)insn + 1, sizeof(delta), &delta))
return FALSE;
callee->Offset = (DWORD_PTR)insn + 1 + 4 + delta;
return TRUE;
case 0xff:
if (!dbg_read_memory((const char*)insn + 1, &ch, sizeof(ch)))
return FALSE;
WINE_TRACE("Got 0xFF %x (&C7=%x) with rex=%x\n", ch, ch & 0xC7, rex);
/* keep only the CALL and LCALL insn:s */
switch (f_reg(ch))
{
case 0x02:
segment = dbg_context.SegCs;
break;
default: return FALSE;
}
if (rex == 0) 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 (f_reg(ch) == 0x2)
{
/* rip-relative to next insn */
if (!dbg_read_memory((const char*)insn + 2, &delta, sizeof(delta)) ||
!dbg_read_memory((const char*)insn + 6 + delta, &dst, sizeof(dst)))
return FALSE;
callee->Offset = dst;
return TRUE;
}
WINE_FIXME("Unsupported yet call insn (0xFF 0x%02x) at %p\n", ch, insn);
return FALSE;
default:
switch (f_rm(ch))
{
case 0x00: dst = dbg_context.Rax; break;
case 0x01: dst = dbg_context.Rcx; break;
case 0x02: dst = dbg_context.Rdx; break;
case 0x03: dst = dbg_context.Rbx; break;
case 0x04: dst = dbg_context.Rsp; break;
case 0x05: dst = dbg_context.Rbp; break;
case 0x06: dst = dbg_context.Rsi; break;
case 0x07: dst = dbg_context.Rdi; break;
}
if (f_mod(ch) != 0x03)
WINE_FIXME("Unsupported yet call insn (0xFF 0x%02x) at %p\n", ch, insn);
else
{
callee->Offset = dst;
}
break;
}
else
WINE_FIXME("Unsupported yet call insn (rex=0x%02x 0xFF 0x%02x) at %p\n", rex, ch, insn);
return FALSE;
default:
return FALSE;
}
}
static unsigned be_x86_64_is_jump(const void* insn, ADDRESS64* jumpee)
{
return FALSE;
}
extern void be_x86_64_disasm_one_insn(ADDRESS64* addr, int display);
#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_LEN_8 (0x8)
#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_x86_64_get_unused_DR(CONTEXT* ctx, DWORD64** r)
{
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 unsigned be_x86_64_insert_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
CONTEXT* ctx, enum be_xpoint_type type,
void* addr, unsigned long* val, unsigned size)
{
unsigned char ch;
SIZE_T sz;
DWORD64 *pr;
int reg;
unsigned long bits;
switch (type)
{
case be_xpoint_break:
if (size != 0) return 0;
if (!pio->read(hProcess, addr, &ch, 1, &sz) || sz != 1) return 0;
*val = ch;
ch = 0xcc;
if (!pio->write(hProcess, addr, &ch, 1, &sz) || sz != 1) return 0;
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_x86_64_get_unused_DR(ctx, &pr)) == -1) return 0;
*pr = (DWORD64)addr;
if (type != be_xpoint_watch_exec) switch (size)
{
case 8: bits |= DR7_LEN_8; break;
case 4: bits |= DR7_LEN_4; break;
case 2: bits |= DR7_LEN_2; break;
case 1: bits |= DR7_LEN_1; break;
default: WINE_FIXME("Unsupported xpoint_watch of size %d\n", size); return 0;
}
*val = reg;
/* clear old values */
ctx->Dr7 &= ~(0x0F << (DR7_CONTROL_SHIFT + DR7_CONTROL_SIZE * reg));
/* set the correct ones */
ctx->Dr7 |= bits << (DR7_CONTROL_SHIFT + DR7_CONTROL_SIZE * reg);
ctx->Dr7 |= DR7_ENABLE_MASK(reg) | DR7_LOCAL_SLOWDOWN;
break;
default:
dbg_printf("Unknown bp type %c\n", type);
return 0;
}
return 1;
}
static unsigned be_x86_64_remove_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
CONTEXT* ctx, enum be_xpoint_type type,
void* addr, unsigned long val, unsigned size)
{
SIZE_T sz;
unsigned char ch;
switch (type)
{
case be_xpoint_break:
if (size != 0) return 0;
if (!pio->read(hProcess, addr, &ch, 1, &sz) || sz != 1) return 0;
if (ch != (unsigned char)0xCC)
WINE_FIXME("Cannot get back %02x instead of 0xCC at %08lx\n",
ch, (unsigned long)addr);
ch = (unsigned char)val;
if (!pio->write(hProcess, addr, &ch, 1, &sz) || sz != 1) return 0;
break;
case be_xpoint_watch_exec:
case be_xpoint_watch_read:
case be_xpoint_watch_write:
/* simply disable the entry */
ctx->Dr7 &= ~DR7_ENABLE_MASK(val);
break;
default:
dbg_printf("Unknown bp type %c\n", type);
return 0;
}
return 1;
}
static unsigned be_x86_64_is_watchpoint_set(const CONTEXT* ctx, unsigned idx)
{
return ctx->Dr6 & (1 << idx);
}
static void be_x86_64_clear_watchpoint(CONTEXT* ctx, unsigned idx)
{
ctx->Dr6 &= ~(1 << idx);
}
static int be_x86_64_adjust_pc_for_break(CONTEXT* ctx, BOOL way)
{
if (way)
{
ctx->Rip--;
return -1;
}
ctx->Rip++;
return 1;
}
static int be_x86_64_fetch_integer(const struct dbg_lvalue* lvalue, unsigned size,
unsigned ext_sign, LONGLONG* ret)
{
if (size != 1 && size != 2 && size != 4 && size != 8 && size != 16)
return FALSE;
memset(ret, 0, sizeof(*ret)); /* clear unread bytes */
/* FIXME: this assumes that debuggee and debugger use the same
* integral representation
*/
if (!memory_read_value(lvalue, size, ret)) return FALSE;
/* propagate sign information */
if (ext_sign && size < 16 && (*ret >> (size * 8 - 1)) != 0)
{
ULONGLONG neg = -1;
*ret |= neg << (size * 8);
}
return TRUE;
}
static int be_x86_64_fetch_float(const struct dbg_lvalue* lvalue, unsigned size,
long double* ret)
{
char tmp[sizeof(long double)];
/* FIXME: this assumes that debuggee and debugger use the same
* representation for reals
*/
if (!memory_read_value(lvalue, size, tmp)) return FALSE;
/* float & double types have to be promoted to a long double */
switch (size)
{
case sizeof(float): *ret = *(float*)tmp; break;
case sizeof(double): *ret = *(double*)tmp; break;
case sizeof(long double): *ret = *(long double*)tmp; break;
default: return FALSE;
}
return TRUE;
}
struct backend_cpu be_x86_64 =
{
IMAGE_FILE_MACHINE_AMD64,
8,
be_cpu_linearize,
be_cpu_build_addr,
be_x86_64_get_addr,
be_x86_64_get_register_info,
be_x86_64_single_step,
be_x86_64_print_context,
be_x86_64_print_segment_info,
be_x86_64_ctx,
be_x86_64_is_step_over_insn,
be_x86_64_is_function_return,
be_x86_64_is_break_insn,
be_x86_64_is_func_call,
be_x86_64_is_jump,
be_x86_64_disasm_one_insn,
be_x86_64_insert_Xpoint,
be_x86_64_remove_Xpoint,
be_x86_64_is_watchpoint_set,
be_x86_64_clear_watchpoint,
be_x86_64_adjust_pc_for_break,
be_x86_64_fetch_integer,
be_x86_64_fetch_float,
};
#endif
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