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Bug #472 » fix-arm-syscall.patch

fix arm syscall instrumentation - Mathieu Desnoyers, 03/23/2013 12:07 PM

View differences:

lttng-syscalls.c
# endif
#endif
#ifndef __NR_SYSCALL_BASE
#define __NR_SYSCALL_BASE 0
#endif
static
void syscall_entry_probe(void *__data, struct pt_regs *regs, long id);
......
#undef TRACE_SYSCALL_TABLE
#define TRACE_SYSCALL_TABLE(_template, _name, _nr, _nrargs) \
[ _nr ] = { \
[ (_nr) - __NR_SYSCALL_BASE ] = { \
.func = __event_probe__##_template, \
.nrargs = (_nrargs), \
.fields = __event_fields___##_template, \
......
#undef TRACE_SYSCALL_TABLE
#define TRACE_SYSCALL_TABLE(_template, _name, _nr, _nrargs) \
[ _nr ] = { \
[ (_nr) - __NR_SYSCALL_BASE] = { \
.func = __event_probe__##compat_##_template, \
.nrargs = (_nrargs), \
.fields = __event_fields___##compat_##_template,\
......
struct lttng_event *event, *unknown_event;
const struct trace_syscall_entry *table, *entry;
size_t table_len;
long syscall_offset;
syscall_offset = id - __NR_SYSCALL_BASE;
if (unlikely(is_compat_task())) {
table = compat_sc_table;
table_len = ARRAY_SIZE(compat_sc_table);
......
table_len = ARRAY_SIZE(sc_table);
unknown_event = chan->sc_unknown;
}
if (unlikely(id >= table_len)) {
syscall_entry_unknown(unknown_event, regs, id);
if (unlikely(syscall_offset >= table_len)) {
syscall_entry_unknown(unknown_event, regs, syscall_offset);
return;
}
if (unlikely(is_compat_task()))
event = chan->compat_sc_table[id];
event = chan->compat_sc_table[syscall_offset];
else
event = chan->sc_table[id];
event = chan->sc_table[syscall_offset];
if (unlikely(!event)) {
syscall_entry_unknown(unknown_event, regs, id);
syscall_entry_unknown(unknown_event, regs, syscall_offset);
return;
}
entry = &table[id];
entry = &table[syscall_offset];
WARN_ON_ONCE(!entry);
switch (entry->nrargs) {
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