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* i386-nat.c (TARGET_HAS_DR_LEN_8, DR_LEN_8): Declare.

Browse source 
(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.
This commit is contained in:
Jiri Smid 2001-09-21 07:16:03 +00:00
parent 5f3b524877
commit e906b9a3a9
1 changed files with 34 additions and 17 deletions
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51
gdb/i386-nat.c
View file

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