Sweden-Number/programs/winedbg/be_x86_64.c

401 lines
15 KiB
C

/*
* 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 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) dbg_printf( "Floating point x86_64 dump not implemented\n" );
}
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_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}
};
static const struct dbg_internal_var* be_x86_64_init_registers(CONTEXT* ctx)
{
struct dbg_internal_var* div;
for (div = be_x86_64_ctx; div->name; div++)
div->pval = (DWORD_PTR*)((char*)ctx + (DWORD_PTR)div->pval);
return be_x86_64_ctx;
}
static unsigned be_x86_64_is_step_over_insn(const void* insn)
{
dbg_printf("not done step_over_insn\n");
return FALSE;
}
static unsigned be_x86_64_is_function_return(const void* insn)
{
dbg_printf("not done is_function_return\n");
return FALSE;
}
static unsigned be_x86_64_is_break_insn(const void* insn)
{
dbg_printf("not done is_break_insn\n");
return FALSE;
}
static unsigned be_x86_64_is_func_call(const void* insn, ADDRESS64* callee)
{
dbg_printf("not done is_func_call\n");
return FALSE;
}
static void be_x86_64_disasm_one_insn(ADDRESS64* addr, int display)
{
dbg_printf("Disasm NIY\n");
}
#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_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 4: bits |= DR7_LEN_4; break;
case 2: bits |= DR7_LEN_2; break;
case 1: bits |= DR7_LEN_1; break;
default: 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)
{
dbg_printf("not done fetch_float\n");
return FALSE;
}
struct backend_cpu be_x86_64 =
{
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_init_registers,
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_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