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authorMarkus Metzger <markus.t.metzger@intel.com>2008-01-30 13:32:03 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:32:03 +0100
commite6ae5d9540727b0e2e5e2fbeb683c84671ed0a31 (patch)
tree921ac1e9d98478b4d3b23171e965b868df7e36a9 /arch/x86/kernel/ds.c
parentda35c37198132abebf877cca2ad3c6d9bcd84282 (diff)
x86, ptrace: support 32bit-cross-64bit BTS recording
Support BTS recording of 32bit and 64bit tasks from 32bit or 64bit tasks. Signed-off-by: Markus Metzger <markus.t.metzger@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/ds.c')
-rw-r--r--arch/x86/kernel/ds.c91
1 files changed, 45 insertions, 46 deletions
diff --git a/arch/x86/kernel/ds.c b/arch/x86/kernel/ds.c
index 6eb5d49a36b..1c5ca4d1878 100644
--- a/arch/x86/kernel/ds.c
+++ b/arch/x86/kernel/ds.c
@@ -111,53 +111,53 @@ static struct ds_configuration ds_cfg;
* Accessor functions for some DS and BTS fields using the above
* global ptrace_bts_cfg.
*/
-static inline void *get_bts_buffer_base(char *base)
+static inline unsigned long get_bts_buffer_base(char *base)
{
- return *(void **)(base + ds_cfg.bts_buffer_base.offset);
+ return *(unsigned long *)(base + ds_cfg.bts_buffer_base.offset);
}
-static inline void set_bts_buffer_base(char *base, void *value)
+static inline void set_bts_buffer_base(char *base, unsigned long value)
{
- (*(void **)(base + ds_cfg.bts_buffer_base.offset)) = value;
+ (*(unsigned long *)(base + ds_cfg.bts_buffer_base.offset)) = value;
}
-static inline void *get_bts_index(char *base)
+static inline unsigned long get_bts_index(char *base)
{
- return *(void **)(base + ds_cfg.bts_index.offset);
+ return *(unsigned long *)(base + ds_cfg.bts_index.offset);
}
-static inline void set_bts_index(char *base, void *value)
+static inline void set_bts_index(char *base, unsigned long value)
{
- (*(void **)(base + ds_cfg.bts_index.offset)) = value;
+ (*(unsigned long *)(base + ds_cfg.bts_index.offset)) = value;
}
-static inline void *get_bts_absolute_maximum(char *base)
+static inline unsigned long get_bts_absolute_maximum(char *base)
{
- return *(void **)(base + ds_cfg.bts_absolute_maximum.offset);
+ return *(unsigned long *)(base + ds_cfg.bts_absolute_maximum.offset);
}
-static inline void set_bts_absolute_maximum(char *base, void *value)
+static inline void set_bts_absolute_maximum(char *base, unsigned long value)
{
- (*(void **)(base + ds_cfg.bts_absolute_maximum.offset)) = value;
+ (*(unsigned long *)(base + ds_cfg.bts_absolute_maximum.offset)) = value;
}
-static inline void *get_bts_interrupt_threshold(char *base)
+static inline unsigned long get_bts_interrupt_threshold(char *base)
{
- return *(void **)(base + ds_cfg.bts_interrupt_threshold.offset);
+ return *(unsigned long *)(base + ds_cfg.bts_interrupt_threshold.offset);
}
-static inline void set_bts_interrupt_threshold(char *base, void *value)
+static inline void set_bts_interrupt_threshold(char *base, unsigned long value)
{
- (*(void **)(base + ds_cfg.bts_interrupt_threshold.offset)) = value;
+ (*(unsigned long *)(base + ds_cfg.bts_interrupt_threshold.offset)) = value;
}
-static inline long get_from_ip(char *base)
+static inline unsigned long get_from_ip(char *base)
{
- return *(long *)(base + ds_cfg.from_ip.offset);
+ return *(unsigned long *)(base + ds_cfg.from_ip.offset);
}
-static inline void set_from_ip(char *base, long value)
+static inline void set_from_ip(char *base, unsigned long value)
{
- (*(long *)(base + ds_cfg.from_ip.offset)) = value;
+ (*(unsigned long *)(base + ds_cfg.from_ip.offset)) = value;
}
-static inline long get_to_ip(char *base)
+static inline unsigned long get_to_ip(char *base)
{
- return *(long *)(base + ds_cfg.to_ip.offset);
+ return *(unsigned long *)(base + ds_cfg.to_ip.offset);
}
-static inline void set_to_ip(char *base, long value)
+static inline void set_to_ip(char *base, unsigned long value)
{
- (*(long *)(base + ds_cfg.to_ip.offset)) = value;
+ (*(unsigned long *)(base + ds_cfg.to_ip.offset)) = value;
}
static inline unsigned char get_info_type(char *base)
{
@@ -180,7 +180,7 @@ static inline void set_info_data(char *base, unsigned long value)
int ds_allocate(void **dsp, size_t bts_size_in_bytes)
{
size_t bts_size_in_records;
- void *bts;
+ unsigned long bts;
void *ds;
if (!ds_cfg.sizeof_ds || !ds_cfg.sizeof_bts)
@@ -197,7 +197,7 @@ int ds_allocate(void **dsp, size_t bts_size_in_bytes)
if (bts_size_in_bytes <= 0)
return -EINVAL;
- bts = kzalloc(bts_size_in_bytes, GFP_KERNEL);
+ bts = (unsigned long)kzalloc(bts_size_in_bytes, GFP_KERNEL);
if (!bts)
return -ENOMEM;
@@ -205,7 +205,7 @@ int ds_allocate(void **dsp, size_t bts_size_in_bytes)
ds = kzalloc(ds_cfg.sizeof_ds, GFP_KERNEL);
if (!ds) {
- kfree(bts);
+ kfree((void *)bts);
return -ENOMEM;
}
@@ -221,7 +221,7 @@ int ds_allocate(void **dsp, size_t bts_size_in_bytes)
int ds_free(void **dsp)
{
if (*dsp)
- kfree(get_bts_buffer_base(*dsp));
+ kfree((void *)get_bts_buffer_base(*dsp));
kfree(*dsp);
*dsp = 0;
@@ -230,7 +230,7 @@ int ds_free(void **dsp)
int ds_get_bts_size(void *ds)
{
- size_t size_in_bytes;
+ int size_in_bytes;
if (!ds_cfg.sizeof_ds || !ds_cfg.sizeof_bts)
return -EOPNOTSUPP;
@@ -246,7 +246,7 @@ int ds_get_bts_size(void *ds)
int ds_get_bts_end(void *ds)
{
- size_t size_in_bytes = ds_get_bts_size(ds);
+ int size_in_bytes = ds_get_bts_size(ds);
if (size_in_bytes <= 0)
return size_in_bytes;
@@ -256,7 +256,7 @@ int ds_get_bts_end(void *ds)
int ds_get_bts_index(void *ds)
{
- size_t index_offset_in_bytes;
+ int index_offset_in_bytes;
if (!ds_cfg.sizeof_ds || !ds_cfg.sizeof_bts)
return -EOPNOTSUPP;
@@ -288,19 +288,19 @@ int ds_get_overflow(void *ds)
int ds_clear(void *ds)
{
int bts_size = ds_get_bts_size(ds);
- void *bts_base;
+ unsigned long bts_base;
if (bts_size <= 0)
return bts_size;
bts_base = get_bts_buffer_base(ds);
- memset(bts_base, 0, bts_size);
+ memset((void *)bts_base, 0, bts_size);
set_bts_index(ds, bts_base);
return 0;
}
-int ds_read_bts(void *ds, size_t index, struct bts_struct *out)
+int ds_read_bts(void *ds, int index, struct bts_struct *out)
{
void *bts;
@@ -313,8 +313,7 @@ int ds_read_bts(void *ds, size_t index, struct bts_struct *out)
if (index >= ds_get_bts_size(ds))
return -EINVAL;
- bts = get_bts_buffer_base(ds);
- bts = (char *)bts + (index * ds_cfg.sizeof_bts);
+ bts = (void *)(get_bts_buffer_base(ds) + (index * ds_cfg.sizeof_bts));
memset(out, 0, sizeof(*out));
if (get_from_ip(bts) == BTS_ESCAPE_ADDRESS) {
@@ -326,12 +325,12 @@ int ds_read_bts(void *ds, size_t index, struct bts_struct *out)
out->variant.lbr.to_ip = get_to_ip(bts);
}
- return 0;
+ return sizeof(*out);;
}
int ds_write_bts(void *ds, const struct bts_struct *in)
{
- void *bts;
+ unsigned long bts;
if (!ds_cfg.sizeof_ds || !ds_cfg.sizeof_bts)
return -EOPNOTSUPP;
@@ -341,33 +340,33 @@ int ds_write_bts(void *ds, const struct bts_struct *in)
bts = get_bts_index(ds);
- memset(bts, 0, ds_cfg.sizeof_bts);
+ memset((void *)bts, 0, ds_cfg.sizeof_bts);
switch (in->qualifier) {
case BTS_INVALID:
break;
case BTS_BRANCH:
- set_from_ip(bts, in->variant.lbr.from_ip);
- set_to_ip(bts, in->variant.lbr.to_ip);
+ set_from_ip((void *)bts, in->variant.lbr.from_ip);
+ set_to_ip((void *)bts, in->variant.lbr.to_ip);
break;
case BTS_TASK_ARRIVES:
case BTS_TASK_DEPARTS:
- set_from_ip(bts, BTS_ESCAPE_ADDRESS);
- set_info_type(bts, in->qualifier);
- set_info_data(bts, in->variant.jiffies);
+ set_from_ip((void *)bts, BTS_ESCAPE_ADDRESS);
+ set_info_type((void *)bts, in->qualifier);
+ set_info_data((void *)bts, in->variant.jiffies);
break;
default:
return -EINVAL;
}
- bts = (char *)bts + ds_cfg.sizeof_bts;
+ bts = bts + ds_cfg.sizeof_bts;
if (bts >= get_bts_absolute_maximum(ds))
bts = get_bts_buffer_base(ds);
set_bts_index(ds, bts);
- return 0;
+ return ds_cfg.sizeof_bts;
}
unsigned long ds_debugctl_mask(void)