* i386-nat.c (TARGET_HAS_DR_LEN_8, DR_LEN_8): Declare.
(i386_length_and_rw_bits, i386_handle_nonaligned_watchpoint, i386_insert_watchpoint, i386_remove_watchpoint): Add support for 8-byte wide watchpoints. (i386_show_dr): Debug message format string change.
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@ -60,6 +60,11 @@
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#ifdef I386_USE_GENERIC_WATCHPOINTS
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/* Support for 8-byte wide hw watchpoints. */
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#ifndef TARGET_HAS_DR_LEN_8
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#define TARGET_HAS_DR_LEN_8 0
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#endif
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/* Debug registers' indices. */
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#define DR_NADDR 4 /* the number of debug address registers */
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#define DR_STATUS 6 /* index of debug status register (DR6) */
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@ -89,6 +94,7 @@
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#define DR_LEN_1 (0x0 << 2) /* 1-byte region watch or breakpt */
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#define DR_LEN_2 (0x1 << 2) /* 2-byte region watch */
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#define DR_LEN_4 (0x3 << 2) /* 4-byte region watch */
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#define DR_LEN_8 (0x2 << 2) /* 8-byte region watch (x86-64) */
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/* Local and Global Enable flags in DR7.
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@ -252,9 +258,9 @@ i386_show_dr (const char *func, CORE_ADDR addr,
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dr_control_mirror, dr_status_mirror);
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ALL_DEBUG_REGISTERS(i)
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{
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printf_unfiltered ("\tDR%d: addr=%08lx, ref.count=%d DR%d: addr=%08lx, ref.count=%d\n",
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i, dr_mirror[i], dr_ref_count[i],
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i+1, dr_mirror[i+1], dr_ref_count[i+1]);
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printf_unfiltered ("\tDR%d: addr=0x%s, ref.count=%d DR%d: addr=0x%s, ref.count=%d\n",
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i, paddr(dr_mirror[i]), dr_ref_count[i],
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i+1, paddr(dr_mirror[i+1]), dr_ref_count[i+1]);
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i++;
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}
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}
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@ -291,12 +297,15 @@ Invalid hw breakpoint type %d in i386_length_and_rw_bits.\n", (int)type);
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switch (len)
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{
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case 4:
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return (DR_LEN_4 | rw);
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case 2:
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return (DR_LEN_2 | rw);
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case 1:
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return (DR_LEN_1 | rw);
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case 2:
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return (DR_LEN_2 | rw);
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case 4:
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return (DR_LEN_4 | rw);
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case 8:
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if (TARGET_HAS_DR_LEN_8)
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return (DR_LEN_8 | rw);
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default:
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internal_error (__FILE__, __LINE__, "\
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Invalid hw breakpoint length %d in i386_length_and_rw_bits.\n", len);
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@ -407,20 +416,26 @@ i386_handle_nonaligned_watchpoint (i386_wp_op_t what, CORE_ADDR addr, int len,
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int align;
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int size;
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int rv = 0, status = 0;
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int max_wp_len = TARGET_HAS_DR_LEN_8 ? 8 : 4;
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static int size_try_array[4][4] =
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static int size_try_array[8][8] =
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{
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{ 1, 1, 1, 1 }, /* trying size one */
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{ 2, 1, 2, 1 }, /* trying size two */
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{ 2, 1, 2, 1 }, /* trying size three */
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{ 4, 1, 2, 1 } /* trying size four */
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{1, 1, 1, 1, 1, 1, 1, 1}, /* trying size one */
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{2, 1, 2, 1, 2, 1, 2, 1}, /* trying size two */
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{2, 1, 2, 1, 2, 1, 2, 1}, /* trying size three */
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{4, 1, 2, 1, 4, 1, 2, 1}, /* trying size four */
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{4, 1, 2, 1, 4, 1, 2, 1}, /* trying size five */
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{4, 1, 2, 1, 4, 1, 2, 1}, /* trying size six */
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{4, 1, 2, 1, 4, 1, 2, 1}, /* trying size seven */
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{8, 1, 2, 1, 4, 1, 2, 1}, /* trying size eight */
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};
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while (len > 0)
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{
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align = addr % 4;
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/* Four is the maximum length an x86 debug register can watch. */
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size = size_try_array[len > 4 ? 3 : len - 1][align];
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align = addr % max_wp_len;
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/* Four(eigth on x86_64) is the maximum length an x86 debug register
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can watch. */
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size = size_try_array[len > max_wp_len ? (max_wp_len - 1) : len - 1][align];
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if (what == WP_COUNT)
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/* size_try_array[] is defined so that each iteration through
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the loop is guaranteed to produce an address and a size
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@ -466,7 +481,8 @@ i386_insert_watchpoint (CORE_ADDR addr, int len, int type)
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{
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int retval;
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if (len == 3 || len > 4 || addr % len != 0)
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if (((len != 1 && len !=2 && len !=4) && !(TARGET_HAS_DR_LEN_8 && len == 8))
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|| addr % len != 0)
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retval = i386_handle_nonaligned_watchpoint (WP_INSERT, addr, len, type);
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else
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{
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@ -489,7 +505,8 @@ i386_remove_watchpoint (CORE_ADDR addr, int len, int type)
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{
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int retval;
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if (len == 3 || len > 4 || addr % len != 0)
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if (((len != 1 && len !=2 && len !=4) && !(TARGET_HAS_DR_LEN_8 && len == 8))
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|| addr % len != 0)
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retval = i386_handle_nonaligned_watchpoint (WP_REMOVE, addr, len, type);
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else
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{
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