#include "ppc32.h"
#endif
-/*
- * Store another value in a callchain_entry.
- */
-static inline void callchain_store(struct perf_callchain_entry *entry, u64 ip)
-{
- unsigned int nr = entry->nr;
-
- if (nr < PERF_MAX_STACK_DEPTH) {
- entry->ip[nr] = ip;
- entry->nr = nr + 1;
- }
-}
/*
* Is sp valid as the address of the next kernel stack frame after prev_sp?
return 0;
}
-static void perf_callchain_kernel(struct pt_regs *regs,
- struct perf_callchain_entry *entry)
+void
+perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs)
{
unsigned long sp, next_sp;
unsigned long next_ip;
lr = regs->link;
sp = regs->gpr[1];
- callchain_store(entry, PERF_CONTEXT_KERNEL);
- callchain_store(entry, regs->nip);
+ perf_callchain_store(entry, regs->nip);
if (!validate_sp(sp, current, STACK_FRAME_OVERHEAD))
return;
next_ip = regs->nip;
lr = regs->link;
level = 0;
- callchain_store(entry, PERF_CONTEXT_KERNEL);
+ perf_callchain_store(entry, PERF_CONTEXT_KERNEL);
} else {
if (level == 0)
++level;
}
- callchain_store(entry, next_ip);
+ perf_callchain_store(entry, next_ip);
if (!valid_next_sp(next_sp, sp))
return;
sp = next_sp;
puc == (unsigned long) &sf->uc;
}
-static void perf_callchain_user_64(struct pt_regs *regs,
- struct perf_callchain_entry *entry)
+static void perf_callchain_user_64(struct perf_callchain_entry *entry,
+ struct pt_regs *regs)
{
unsigned long sp, next_sp;
unsigned long next_ip;
next_ip = regs->nip;
lr = regs->link;
sp = regs->gpr[1];
- callchain_store(entry, PERF_CONTEXT_USER);
- callchain_store(entry, next_ip);
+ perf_callchain_store(entry, next_ip);
for (;;) {
fp = (unsigned long __user *) sp;
read_user_stack_64(&uregs[PT_R1], &sp))
return;
level = 0;
- callchain_store(entry, PERF_CONTEXT_USER);
- callchain_store(entry, next_ip);
+ perf_callchain_store(entry, PERF_CONTEXT_USER);
+ perf_callchain_store(entry, next_ip);
continue;
}
if (level == 0)
next_ip = lr;
- callchain_store(entry, next_ip);
+ perf_callchain_store(entry, next_ip);
++level;
sp = next_sp;
}
return __get_user_inatomic(*ret, ptr);
}
-static inline void perf_callchain_user_64(struct pt_regs *regs,
- struct perf_callchain_entry *entry)
+static inline void perf_callchain_user_64(struct perf_callchain_entry *entry,
+ struct pt_regs *regs)
{
}
return mctx->mc_gregs;
}
-static void perf_callchain_user_32(struct pt_regs *regs,
- struct perf_callchain_entry *entry)
+static void perf_callchain_user_32(struct perf_callchain_entry *entry,
+ struct pt_regs *regs)
{
unsigned int sp, next_sp;
unsigned int next_ip;
next_ip = regs->nip;
lr = regs->link;
sp = regs->gpr[1];
- callchain_store(entry, PERF_CONTEXT_USER);
- callchain_store(entry, next_ip);
+ perf_callchain_store(entry, next_ip);
while (entry->nr < PERF_MAX_STACK_DEPTH) {
fp = (unsigned int __user *) (unsigned long) sp;
read_user_stack_32(&uregs[PT_R1], &sp))
return;
level = 0;
- callchain_store(entry, PERF_CONTEXT_USER);
- callchain_store(entry, next_ip);
+ perf_callchain_store(entry, PERF_CONTEXT_USER);
+ perf_callchain_store(entry, next_ip);
continue;
}
if (level == 0)
next_ip = lr;
- callchain_store(entry, next_ip);
+ perf_callchain_store(entry, next_ip);
++level;
sp = next_sp;
}
}
-/*
- * Since we can't get PMU interrupts inside a PMU interrupt handler,
- * we don't need separate irq and nmi entries here.
- */
-static DEFINE_PER_CPU(struct perf_callchain_entry, cpu_perf_callchain);
-
-struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
+void
+perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs)
{
- struct perf_callchain_entry *entry = &__get_cpu_var(cpu_perf_callchain);
-
- entry->nr = 0;
-
- if (!user_mode(regs)) {
- perf_callchain_kernel(regs, entry);
- if (current->mm)
- regs = task_pt_regs(current);
- else
- regs = NULL;
- }
-
- if (regs) {
- if (current_is_64bit())
- perf_callchain_user_64(regs, entry);
- else
- perf_callchain_user_32(regs, entry);
- }
-
- return entry;
+ if (current_is_64bit())
+ perf_callchain_user_64(entry, regs);
+ else
+ perf_callchain_user_32(entry, regs);
}