2 * Debugger i386 specific functions
4 * Copyright 2004 Eric Pouech
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
22 #include "wine/debug.h"
24 WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
28 /* debugger/db_disasm.c */
29 extern void be_i386_disasm_one_insn(ADDRESS64* addr, int display);
31 #define STEP_FLAG 0x00000100 /* single step flag */
32 #define V86_FLAG 0x00020000
34 #define IS_VM86_MODE(ctx) (ctx->EFlags & V86_FLAG)
36 static ADDRESS_MODE get_selector_type(HANDLE hThread, const CONTEXT* ctx, WORD sel)
40 if (IS_VM86_MODE(ctx)) return AddrModeReal;
41 /* null or system selector */
42 if (!(sel & 4) || ((sel >> 3) < 17)) return AddrModeFlat;
43 if (GetThreadSelectorEntry(hThread, sel, &le))
44 return le.HighWord.Bits.Default_Big ? AddrMode1632 : AddrMode1616;
45 /* selector doesn't exist */
49 static void* be_i386_linearize(HANDLE hThread, const ADDRESS64* addr)
56 return (void*)((DWORD)(LOWORD(addr->Segment) << 4) + (DWORD)addr->Offset);
58 if (!(addr->Segment & 4) || ((addr->Segment >> 3) < 17))
59 return (void*)(DWORD)addr->Offset;
62 if (!GetThreadSelectorEntry(hThread, addr->Segment, &le)) return NULL;
63 return (void*)((le.HighWord.Bits.BaseHi << 24) +
64 (le.HighWord.Bits.BaseMid << 16) + le.BaseLow +
68 return (void*)(DWORD)addr->Offset;
73 static unsigned be_i386_build_addr(HANDLE hThread, const CONTEXT* ctx, ADDRESS64* addr,
74 unsigned seg, unsigned long offset)
76 addr->Mode = AddrModeFlat;
78 addr->Offset = offset;
81 addr->Mode = get_selector_type(hThread, ctx, seg);
86 addr->Offset &= 0xffff;
99 static unsigned be_i386_get_addr(HANDLE hThread, const CONTEXT* ctx,
100 enum be_cpu_addr bca, ADDRESS64* addr)
105 return be_i386_build_addr(hThread, ctx, addr, ctx->SegCs, ctx->Eip);
106 case be_cpu_addr_stack:
107 return be_i386_build_addr(hThread, ctx, addr, ctx->SegSs, ctx->Esp);
108 case be_cpu_addr_frame:
109 return be_i386_build_addr(hThread, ctx, addr, ctx->SegSs, ctx->Ebp);
114 static void be_i386_single_step(CONTEXT* ctx, unsigned enable)
116 if (enable) ctx->EFlags |= STEP_FLAG;
117 else ctx->EFlags &= ~STEP_FLAG;
120 static void be_i386_all_print_context(HANDLE hThread, const CONTEXT* ctx)
122 long double ST[8]; /* These are for floating regs */
125 /* Break out the FPU state and the floating point registers */
126 dbg_printf("Floating Point Unit status:\n");
127 dbg_printf(" FLCW:%04x ", LOWORD(ctx->FloatSave.ControlWord));
128 dbg_printf(" FLTW:%04x ", LOWORD(ctx->FloatSave.TagWord));
129 dbg_printf(" FLEO:%08x ", (unsigned int) ctx->FloatSave.ErrorOffset);
130 dbg_printf(" FLSW:%04x", LOWORD(ctx->FloatSave.StatusWord));
132 /* Isolate the condition code bits - note they are not contiguous */
133 dbg_printf("(CC:%ld%ld%ld%ld", (ctx->FloatSave.StatusWord & 0x00004000) >> 14,
134 (ctx->FloatSave.StatusWord & 0x00000400) >> 10,
135 (ctx->FloatSave.StatusWord & 0x00000200) >> 9,
136 (ctx->FloatSave.StatusWord & 0x00000100) >> 8);
138 /* Now pull out hte 3 bit of the TOP stack pointer */
139 dbg_printf(" TOP:%01x", (unsigned int) (ctx->FloatSave.StatusWord & 0x00003800) >> 11);
141 /* Lets analyse the error bits and indicate the status
142 * the Invalid Op flag has sub status which is tested as follows */
143 if (ctx->FloatSave.StatusWord & 0x00000001) { /* Invalid Fl OP */
144 if (ctx->FloatSave.StatusWord & 0x00000040) { /* Stack Fault */
145 if (ctx->FloatSave.StatusWord & 0x00000200) /* C1 says Overflow */
146 dbg_printf(" #IE(Stack Overflow)");
148 dbg_printf(" #IE(Stack Underflow)"); /* Underflow */
150 else dbg_printf(" #IE(Arthimetic error)"); /* Invalid Fl OP */
153 if (ctx->FloatSave.StatusWord & 0x00000002) dbg_printf(" #DE"); /* Denormalised OP */
154 if (ctx->FloatSave.StatusWord & 0x00000004) dbg_printf(" #ZE"); /* Zero Divide */
155 if (ctx->FloatSave.StatusWord & 0x00000008) dbg_printf(" #OE"); /* Overflow */
156 if (ctx->FloatSave.StatusWord & 0x00000010) dbg_printf(" #UE"); /* Underflow */
157 if (ctx->FloatSave.StatusWord & 0x00000020) dbg_printf(" #PE"); /* Precision error */
158 if (ctx->FloatSave.StatusWord & 0x00000040)
159 if (!(ctx->FloatSave.StatusWord & 0x00000001))
160 dbg_printf(" #SE"); /* Stack Fault (don't think this can occur) */
161 if (ctx->FloatSave.StatusWord & 0x00000080) dbg_printf(" #ES"); /* Error Summary */
162 if (ctx->FloatSave.StatusWord & 0x00008000) dbg_printf(" #FB"); /* FPU Busy */
165 /* Here are the rest of the registers */
166 dbg_printf(" FLES:%08x ", (unsigned int) ctx->FloatSave.ErrorSelector);
167 dbg_printf(" FLDO:%08x ", (unsigned int) ctx->FloatSave.DataOffset);
168 dbg_printf(" FLDS:%08x ", (unsigned int) ctx->FloatSave.DataSelector);
169 dbg_printf(" FLCNS:%08x \n", (unsigned int) ctx->FloatSave.Cr0NpxState);
171 /* Now for the floating point registers */
172 dbg_printf("Floating Point Registers:\n");
173 for (cnt = 0; cnt < 4; cnt++)
175 memcpy(&ST[cnt], &ctx->FloatSave.RegisterArea[cnt * 10], 10);
176 dbg_printf(" ST%d:%Lf ", cnt, ST[cnt]);
179 for (cnt = 4; cnt < 8; cnt++)
181 memcpy(&ST[cnt], &ctx->FloatSave.RegisterArea[cnt * 10], 10);
182 dbg_printf(" ST%d:%Lf ", cnt, ST[cnt]);
187 static void be_i386_print_context(HANDLE hThread, const CONTEXT* ctx, int all_regs)
192 dbg_printf("Register dump:\n");
194 /* First get the segment registers out of the way */
195 dbg_printf(" CS:%04x SS:%04x DS:%04x ES:%04x FS:%04x GS:%04x",
196 (WORD)ctx->SegCs, (WORD)ctx->SegSs,
197 (WORD)ctx->SegDs, (WORD)ctx->SegEs,
198 (WORD)ctx->SegFs, (WORD)ctx->SegGs);
200 strcpy(buf, " - 00 - - - ");
201 pt = buf + strlen(buf) - 1;
202 if (ctx->EFlags & 0x00000001) *pt-- = 'C'; /* Carry Flag */
203 if (ctx->EFlags & 0x00000002) *pt-- = '1';
204 if (ctx->EFlags & 0x00000004) *pt-- = 'P'; /* Parity Flag */
205 if (ctx->EFlags & 0x00000008) *pt-- = '-';
206 if (ctx->EFlags & 0x00000010) *pt-- = 'A'; /* Auxiliary Carry Flag */
207 if (ctx->EFlags & 0x00000020) *pt-- = '-';
208 if (ctx->EFlags & 0x00000040) *pt-- = 'Z'; /* Zero Flag */
209 if (ctx->EFlags & 0x00000080) *pt-- = 'S'; /* Sign Flag */
210 if (ctx->EFlags & 0x00000100) *pt-- = 'T'; /* Trap/Trace Flag */
211 if (ctx->EFlags & 0x00000200) *pt-- = 'I'; /* Interupt Enable Flag */
212 if (ctx->EFlags & 0x00000400) *pt-- = 'D'; /* Direction Indicator */
213 if (ctx->EFlags & 0x00000800) *pt-- = 'O'; /* Overflow flags */
214 if (ctx->EFlags & 0x00001000) *pt-- = '1'; /* I/O Privilege Level */
215 if (ctx->EFlags & 0x00002000) *pt-- = '1'; /* I/O Privilege Level */
216 if (ctx->EFlags & 0x00004000) *pt-- = 'N'; /* Nested Task Flag */
217 if (ctx->EFlags & 0x00008000) *pt-- = '-';
218 if (ctx->EFlags & 0x00010000) *pt-- = 'R'; /* Resume Flag */
219 if (ctx->EFlags & 0x00020000) *pt-- = 'V'; /* Vritual Mode Flag */
220 if (ctx->EFlags & 0x00040000) *pt-- = 'a'; /* Alignment Check Flag */
222 switch (get_selector_type(hThread, ctx, ctx->SegCs))
226 dbg_printf("\n IP:%04x SP:%04x BP:%04x FLAGS:%04x(%s)\n",
227 LOWORD(ctx->Eip), LOWORD(ctx->Esp),
228 LOWORD(ctx->Ebp), LOWORD(ctx->EFlags), buf);
229 dbg_printf(" AX:%04x BX:%04x CX:%04x DX:%04x SI:%04x DI:%04x\n",
230 LOWORD(ctx->Eax), LOWORD(ctx->Ebx),
231 LOWORD(ctx->Ecx), LOWORD(ctx->Edx),
232 LOWORD(ctx->Esi), LOWORD(ctx->Edi));
236 dbg_printf("\n EIP:%08lx ESP:%08lx EBP:%08lx EFLAGS:%08lx(%s)\n",
237 ctx->Eip, ctx->Esp, ctx->Ebp, ctx->EFlags, buf);
238 dbg_printf(" EAX:%08lx EBX:%08lx ECX:%08lx EDX:%08lx\n",
239 ctx->Eax, ctx->Ebx, ctx->Ecx, ctx->Edx);
240 dbg_printf(" ESI:%08lx EDI:%08lx\n",
245 if (all_regs) be_i386_all_print_context(hThread, ctx); /* print floating regs */
249 static void be_i386_print_segment_info(HANDLE hThread, const CONTEXT* ctx)
251 if (get_selector_type(hThread, ctx, ctx->SegCs) == AddrMode1616)
253 info_win32_segments(ctx->SegDs >> 3, 1);
254 if (ctx->SegEs != ctx->SegDs) info_win32_segments(ctx->SegEs >> 3, 1);
256 info_win32_segments(ctx->SegFs >> 3, 1);
259 static struct dbg_internal_var be_i386_ctx[] =
261 {CV_REG_AL, "AL", (DWORD*)FIELD_OFFSET(CONTEXT, Eax), dbg_itype_unsigned_char_int},
262 {CV_REG_CL, "CL", (DWORD*)FIELD_OFFSET(CONTEXT, Ecx), dbg_itype_unsigned_char_int},
263 {CV_REG_DL, "DL", (DWORD*)FIELD_OFFSET(CONTEXT, Edx), dbg_itype_unsigned_char_int},
264 {CV_REG_BL, "BL", (DWORD*)FIELD_OFFSET(CONTEXT, Ebx), dbg_itype_unsigned_char_int},
265 {CV_REG_AH, "AH", (DWORD*)(FIELD_OFFSET(CONTEXT, Eax)+1), dbg_itype_unsigned_char_int},
266 {CV_REG_CH, "CH", (DWORD*)(FIELD_OFFSET(CONTEXT, Ecx)+1), dbg_itype_unsigned_char_int},
267 {CV_REG_DH, "DH", (DWORD*)(FIELD_OFFSET(CONTEXT, Edx)+1), dbg_itype_unsigned_char_int},
268 {CV_REG_BH, "BH", (DWORD*)(FIELD_OFFSET(CONTEXT, Ebx)+1), dbg_itype_unsigned_char_int},
269 {CV_REG_AX, "AX", (DWORD*)FIELD_OFFSET(CONTEXT, Eax), dbg_itype_unsigned_short_int},
270 {CV_REG_CX, "CX", (DWORD*)FIELD_OFFSET(CONTEXT, Ecx), dbg_itype_unsigned_short_int},
271 {CV_REG_DX, "DX", (DWORD*)FIELD_OFFSET(CONTEXT, Edx), dbg_itype_unsigned_short_int},
272 {CV_REG_BX, "BX", (DWORD*)FIELD_OFFSET(CONTEXT, Ebx), dbg_itype_unsigned_short_int},
273 {CV_REG_SP, "SP", (DWORD*)FIELD_OFFSET(CONTEXT, Esp), dbg_itype_unsigned_short_int},
274 {CV_REG_BP, "BP", (DWORD*)FIELD_OFFSET(CONTEXT, Ebp), dbg_itype_unsigned_short_int},
275 {CV_REG_SI, "SI", (DWORD*)FIELD_OFFSET(CONTEXT, Esi), dbg_itype_unsigned_short_int},
276 {CV_REG_DI, "DI", (DWORD*)FIELD_OFFSET(CONTEXT, Edi), dbg_itype_unsigned_short_int},
277 {CV_REG_EAX, "EAX", (DWORD*)FIELD_OFFSET(CONTEXT, Eax), dbg_itype_unsigned_int},
278 {CV_REG_ECX, "ECX", (DWORD*)FIELD_OFFSET(CONTEXT, Ecx), dbg_itype_unsigned_int},
279 {CV_REG_EDX, "EDX", (DWORD*)FIELD_OFFSET(CONTEXT, Edx), dbg_itype_unsigned_int},
280 {CV_REG_EBX, "EBX", (DWORD*)FIELD_OFFSET(CONTEXT, Ebx), dbg_itype_unsigned_int},
281 {CV_REG_ESP, "ESP", (DWORD*)FIELD_OFFSET(CONTEXT, Esp), dbg_itype_unsigned_int},
282 {CV_REG_EBP, "EBP", (DWORD*)FIELD_OFFSET(CONTEXT, Ebp), dbg_itype_unsigned_int},
283 {CV_REG_ESI, "ESI", (DWORD*)FIELD_OFFSET(CONTEXT, Esi), dbg_itype_unsigned_int},
284 {CV_REG_EDI, "EDI", (DWORD*)FIELD_OFFSET(CONTEXT, Edi), dbg_itype_unsigned_int},
285 {CV_REG_ES, "ES", (DWORD*)FIELD_OFFSET(CONTEXT, SegEs), dbg_itype_unsigned_short_int},
286 {CV_REG_CS, "CS", (DWORD*)FIELD_OFFSET(CONTEXT, SegCs), dbg_itype_unsigned_short_int},
287 {CV_REG_SS, "SS", (DWORD*)FIELD_OFFSET(CONTEXT, SegSs), dbg_itype_unsigned_short_int},
288 {CV_REG_DS, "DS", (DWORD*)FIELD_OFFSET(CONTEXT, SegDs), dbg_itype_unsigned_short_int},
289 {CV_REG_FS, "FS", (DWORD*)FIELD_OFFSET(CONTEXT, SegFs), dbg_itype_unsigned_short_int},
290 {CV_REG_GS, "GS", (DWORD*)FIELD_OFFSET(CONTEXT, SegGs), dbg_itype_unsigned_short_int},
291 {CV_REG_IP, "IP", (DWORD*)FIELD_OFFSET(CONTEXT, Eip), dbg_itype_unsigned_short_int},
292 {CV_REG_FLAGS, "FLAGS", (DWORD*)FIELD_OFFSET(CONTEXT, EFlags), dbg_itype_unsigned_short_int},
293 {CV_REG_EIP, "EIP", (DWORD*)FIELD_OFFSET(CONTEXT, Eip), dbg_itype_unsigned_int},
294 {CV_REG_EFLAGS, "EFLAGS", (DWORD*)FIELD_OFFSET(CONTEXT, EFlags), dbg_itype_unsigned_int},
295 {0, NULL, 0, dbg_itype_none}
298 static const struct dbg_internal_var* be_i386_init_registers(CONTEXT* ctx)
300 struct dbg_internal_var* div;
302 for (div = be_i386_ctx; div->name; div++)
303 div->pval = (DWORD*)((char*)ctx + (DWORD)div->pval);
307 static unsigned be_i386_is_step_over_insn(const void* insn)
313 if (!dbg_read_memory(insn, &ch, sizeof(ch))) return FALSE;
317 /* Skip all prefixes */
324 case 0x66: /* opcode size prefix */
325 case 0x67: /* addr size prefix */
326 case 0xf0: /* lock */
327 case 0xf2: /* repne */
328 case 0xf3: /* repe */
329 insn = (const char*)insn + 1;
332 /* Handle call instructions */
333 case 0xcd: /* int <intno> */
334 case 0xe8: /* call <offset> */
335 case 0x9a: /* lcall <seg>:<off> */
338 case 0xff: /* call <regmodrm> */
339 if (!dbg_read_memory((const char*)insn + 1, &ch, sizeof(ch)))
341 return (((ch & 0x38) == 0x10) || ((ch & 0x38) == 0x18));
343 /* Handle string instructions */
344 case 0x6c: /* insb */
345 case 0x6d: /* insw */
346 case 0x6e: /* outsb */
347 case 0x6f: /* outsw */
348 case 0xa4: /* movsb */
349 case 0xa5: /* movsw */
350 case 0xa6: /* cmpsb */
351 case 0xa7: /* cmpsw */
352 case 0xaa: /* stosb */
353 case 0xab: /* stosw */
354 case 0xac: /* lodsb */
355 case 0xad: /* lodsw */
356 case 0xae: /* scasb */
357 case 0xaf: /* scasw */
366 static unsigned be_i386_is_function_return(const void* insn)
370 if (!dbg_read_memory(insn, &ch, sizeof(ch))) return FALSE;
371 return (ch == 0xC2) || (ch == 0xC3);
374 static unsigned be_i386_is_break_insn(const void* insn)
378 if (!dbg_read_memory(insn, &c, sizeof(c))) return FALSE;
382 static unsigned be_i386_is_func_call(const void* insn, ADDRESS64* callee)
387 if (!dbg_read_memory(insn, &ch, sizeof(ch))) return FALSE;
391 dbg_read_memory((const char*)insn + 1, &delta, sizeof(delta));
393 callee->Mode = AddrModeFlat;
394 callee->Offset = (DWORD)insn;
395 be_i386_disasm_one_insn(callee, FALSE);
396 callee->Offset += delta;
400 if (!dbg_read_memory((const char*)insn + 1, &ch, sizeof(ch)))
403 if (ch != 0x10 && ch != 0x18) return FALSE;
407 WINE_FIXME("Unsupported yet call insn (0x%02x) at %p\n", ch, insn);
414 #define DR7_CONTROL_SHIFT 16
415 #define DR7_CONTROL_SIZE 4
417 #define DR7_RW_EXECUTE (0x0)
418 #define DR7_RW_WRITE (0x1)
419 #define DR7_RW_READ (0x3)
421 #define DR7_LEN_1 (0x0)
422 #define DR7_LEN_2 (0x4)
423 #define DR7_LEN_4 (0xC)
425 #define DR7_LOCAL_ENABLE_SHIFT 0
426 #define DR7_GLOBAL_ENABLE_SHIFT 1
427 #define DR7_ENABLE_SIZE 2
429 #define DR7_LOCAL_ENABLE_MASK (0x55)
430 #define DR7_GLOBAL_ENABLE_MASK (0xAA)
432 #define DR7_CONTROL_RESERVED (0xFC00)
433 #define DR7_LOCAL_SLOWDOWN (0x100)
434 #define DR7_GLOBAL_SLOWDOWN (0x200)
436 #define DR7_ENABLE_MASK(dr) (1<<(DR7_LOCAL_ENABLE_SHIFT+DR7_ENABLE_SIZE*(dr)))
437 #define IS_DR7_SET(ctrl,dr) ((ctrl)&DR7_ENABLE_MASK(dr))
439 static inline int be_i386_get_unused_DR(CONTEXT* ctx, unsigned long** r)
441 if (!IS_DR7_SET(ctx->Dr7, 0))
446 if (!IS_DR7_SET(ctx->Dr7, 1))
451 if (!IS_DR7_SET(ctx->Dr7, 2))
456 if (!IS_DR7_SET(ctx->Dr7, 3))
461 dbg_printf("All hardware registers have been used\n");
466 static unsigned be_i386_insert_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
467 CONTEXT* ctx, enum be_xpoint_type type,
468 void* addr, unsigned long* val, unsigned size)
478 case be_xpoint_break:
479 if (size != 0) return 0;
480 if (!pio->read(hProcess, addr, &ch, 1, &sz) || sz != 1) return 0;
483 if (!pio->write(hProcess, addr, &ch, 1, &sz) || sz != 1) return 0;
485 case be_xpoint_watch_exec:
486 bits = DR7_RW_EXECUTE;
488 case be_xpoint_watch_read:
491 case be_xpoint_watch_write:
494 if ((reg = be_i386_get_unused_DR(ctx, &pr)) == -1) return 0;
495 *pr = (unsigned long)addr;
496 if (type != be_xpoint_watch_exec) switch (size)
498 case 4: bits |= DR7_LEN_4; break;
499 case 2: bits |= DR7_LEN_2; break;
500 case 1: bits |= DR7_LEN_1; break;
504 /* clear old values */
505 ctx->Dr7 &= ~(0x0F << (DR7_CONTROL_SHIFT + DR7_CONTROL_SIZE * reg));
506 /* set the correct ones */
507 ctx->Dr7 |= bits << (DR7_CONTROL_SHIFT + DR7_CONTROL_SIZE * reg);
508 ctx->Dr7 |= DR7_ENABLE_MASK(reg) | DR7_LOCAL_SLOWDOWN;
511 dbg_printf("Unknown bp type %c\n", type);
517 static unsigned be_i386_remove_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
518 CONTEXT* ctx, enum be_xpoint_type type,
519 void* addr, unsigned long val, unsigned size)
526 case be_xpoint_break:
527 if (size != 0) return 0;
528 if (!pio->read(hProcess, addr, &ch, 1, &sz) || sz != 1) return 0;
529 if (ch != (unsigned char)0xCC)
530 WINE_FIXME("Cannot get back %02x instead of 0xCC at %08lx\n",
531 ch, (unsigned long)addr);
532 ch = (unsigned char)val;
533 if (!pio->write(hProcess, addr, &ch, 1, &sz) || sz != 1) return 0;
535 case be_xpoint_watch_exec:
536 case be_xpoint_watch_read:
537 case be_xpoint_watch_write:
538 /* simply disable the entry */
539 ctx->Dr7 &= ~DR7_ENABLE_MASK(val);
542 dbg_printf("Unknown bp type %c\n", type);
548 static unsigned be_i386_is_watchpoint_set(const CONTEXT* ctx, unsigned idx)
550 return ctx->Dr6 & (1 << idx);
553 static void be_i386_clear_watchpoint(CONTEXT* ctx, unsigned idx)
555 ctx->Dr6 &= ~(1 << idx);
558 static int be_i386_adjust_pc_for_break(CONTEXT* ctx, BOOL way)
569 static int be_i386_fetch_integer(const struct dbg_lvalue* lvalue, unsigned size,
570 unsigned ext_sign, LONGLONG* ret)
572 if (size != 1 && size != 2 && size != 4 && size != 8) return FALSE;
574 memset(ret, 0, sizeof(*ret)); /* clear unread bytes */
575 /* FIXME: this assumes that debuggee and debugger use the same
576 * integral representation
578 if (!memory_read_value(lvalue, size, ret)) return FALSE;
580 /* propagate sign information */
581 if (ext_sign && size < 8 && (*ret >> (size * 8 - 1)) != 0)
584 *ret |= neg << (size * 8);
589 static int be_i386_fetch_float(const struct dbg_lvalue* lvalue, unsigned size,
594 /* FIXME: this assumes that debuggee and debugger use the same
595 * representation for reals
597 if (!memory_read_value(lvalue, size, tmp)) return FALSE;
599 /* float & double types have to be promoted to a long double */
602 case sizeof(float): *ret = *(float*)tmp; break;
603 case sizeof(double): *ret = *(double*)tmp; break;
604 case sizeof(long double): *ret = *(long double*)tmp; break;
605 default: return FALSE;
610 struct backend_cpu be_i386 =
616 be_i386_print_context,
617 be_i386_print_segment_info,
618 be_i386_init_registers,
619 be_i386_is_step_over_insn,
620 be_i386_is_function_return,
621 be_i386_is_break_insn,
622 be_i386_is_func_call,
623 be_i386_disasm_one_insn,
624 be_i386_insert_Xpoint,
625 be_i386_remove_Xpoint,
626 be_i386_is_watchpoint_set,
627 be_i386_clear_watchpoint,
628 be_i386_adjust_pc_for_break,
629 be_i386_fetch_integer,