Module: wine Branch: master Commit: 4195c2f3bb646a14d1730f83797a6b7646979a2b URL: http://source.winehq.org/git/wine.git/?a=commit;h=4195c2f3bb646a14d1730f8379...
Author: Eric Pouech eric.pouech@orange.fr Date: Mon Dec 14 22:06:00 2009 +0100
winedbg: Implement breakpoint management for x86_64 targets.
---
programs/winedbg/be_x86_64.c | 135 +++++++++++++++++++++++++++++++++++++++-- 1 files changed, 128 insertions(+), 7 deletions(-)
diff --git a/programs/winedbg/be_x86_64.c b/programs/winedbg/be_x86_64.c index ed5cdf2..2f58c88 100644 --- a/programs/winedbg/be_x86_64.c +++ b/programs/winedbg/be_x86_64.c @@ -2,6 +2,7 @@ * 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 @@ -19,6 +20,9 @@ */
#include "debugger.h" +#include "wine/debug.h" + +WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
#if defined(__x86_64__)
@@ -187,31 +191,148 @@ 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) { - dbg_printf("not done insert_Xpoint\n"); - return 0; + 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) { - dbg_printf("not done remove_Xpoint\n"); - return FALSE; + 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) { - dbg_printf("not done is_watchpoint_set\n"); - return FALSE; + return ctx->Dr6 & (1 << idx); }
static void be_x86_64_clear_watchpoint(CONTEXT* ctx, unsigned idx) { - dbg_printf("not done clear_watchpoint\n"); + ctx->Dr6 &= ~(1 << idx); }
static int be_x86_64_adjust_pc_for_break(CONTEXT* ctx, BOOL way)
-
Alexandre Julliard