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add hard-coded libafl_exec_systick_hook

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This commit is contained in:
Alwin Berger 2022-04-26 00:29:18 +02:00
parent 8a379ba198
commit a5a49c3292
1 changed files with 22 additions and 0 deletions
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22
hw/timer/armv7m_systick.c
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@ -39,8 +39,30 @@ static inline int64_t systick_scale(SysTickState *s)
} }
} }
/* Begin LibAFL instrumentation */
extern void libafl_send_irq(int irqn);
extern int64_t libafl_get_clock( void );
volatile unsigned int libafl_int_offset = 0;
volatile bool libafl_int_done = false;
/* This can be moved to a helper function later */
inline void libafl_exec_systick_hook(void);
inline void libafl_exec_systick_hook(void)
{
if (libafl_int_offset!=0 && libafl_int_offset) {
if (libafl_get_clock() >= libafl_int_offset) {
if (!libafl_int_done) {
libafl_int_done = true;
libafl_send_irq(0);
}
} else {
libafl_int_done = false;
}
}
}
static void systick_timer_tick(void *opaque) static void systick_timer_tick(void *opaque)
{ {
libafl_exec_systick_hook();
/* End LibAFL instrumentation */
SysTickState *s = (SysTickState *)opaque; SysTickState *s = (SysTickState *)opaque;
trace_systick_timer_tick(); trace_systick_timer_tick();