SYS-OSS/FRET-qemu
4
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

allow interrupts from multiple sources

Browse Source
This commit is contained in:
Alwin Berger 2024-09-05 15:20:06 +02:00
parent d3fca27481
commit 16960d9d07
1 changed files with 24 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
hw/timer/armv7m_systick.c
View File

@ -310,33 +310,42 @@ static void armv7m_systick_register_types(void)
type_init(armv7m_systick_register_types)
/* Begin LibAFL instrumentation */
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wpointer-to-int-cast"
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wint-to-pointer-cast"
#include "qemu/seqlock.h"
#include "sysemu/cpu-timers-internal.h"
#define NUM_INTERRUPT_SOURCES 6
#define MAX_NUM_INTERRUPT 128
extern void libafl_send_irq(int irqn);
volatile uint32_t libafl_interrupt_offsets[MAX_NUM_INTERRUPT];
volatile uint64_t libafl_num_interrupts = 0;
static ptimer_state* libafl_interrupt_timers[MAX_NUM_INTERRUPT] = {0};
volatile uint32_t libafl_interrupt_offsets[NUM_INTERRUPT_SOURCES][MAX_NUM_INTERRUPT];
volatile uint64_t libafl_num_interrupts[NUM_INTERRUPT_SOURCES] = {0};
static ptimer_state* libafl_interrupt_timers[NUM_INTERRUPT_SOURCES][MAX_NUM_INTERRUPT] = {0};
/* This can be moved to a helper function later */
static void libafl_timed_int_hook(void*);
static void libafl_timed_int_hook(void* arg)
{
libafl_send_irq(0);
libafl_send_irq((int)arg);
}
void libafl_start_int_timer( void );
void libafl_start_int_timer( void ) {
if (libafl_num_interrupts == 0) {return;}
for (int i=0; i<libafl_num_interrupts && i<MAX_NUM_INTERRUPT; i++) {
if (libafl_interrupt_offsets[i] == 0) {continue;}
if (!libafl_interrupt_timers[i]) {
libafl_interrupt_timers[i] = ptimer_init(&libafl_timed_int_hook, NULL, 0);
for (int source=0; source<NUM_INTERRUPT_SOURCES; source++) {
if (libafl_num_interrupts[source] == 0) {continue;}
for (int i=0; i<libafl_num_interrupts[source] && i<MAX_NUM_INTERRUPT; i++) {
if (libafl_interrupt_offsets[source][i] == 0) {continue;}
if (!libafl_interrupt_timers[source][i]) {
libafl_interrupt_timers[source][i] = ptimer_init(&libafl_timed_int_hook, (void*)source, 0);
}
ptimer_transaction_begin(libafl_interrupt_timers[source][i]);
ptimer_stop(libafl_interrupt_timers[source][i]);
ptimer_set_period(libafl_interrupt_timers[source][i], libafl_interrupt_offsets[source][i]);
ptimer_set_count(libafl_interrupt_timers[source][i], 1 << timers_state.icount_time_shift); // needs to be in sync with shift
ptimer_run(libafl_interrupt_timers[source][i], 1);
ptimer_transaction_commit(libafl_interrupt_timers[source][i]);
}
ptimer_transaction_begin(libafl_interrupt_timers[i]);
ptimer_stop(libafl_interrupt_timers[i]);
ptimer_set_period(libafl_interrupt_timers[i], libafl_interrupt_offsets[i]);
ptimer_set_count(libafl_interrupt_timers[i], 1 << timers_state.icount_time_shift); // needs to be in sync with shift
ptimer_run(libafl_interrupt_timers[i], 1);
ptimer_transaction_commit(libafl_interrupt_timers[i]);
}
}
#pragma GCC diagnostic pop
#pragma GCC diagnostic pop
/* End LibAFL instrumentation */