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libafl_qemu: fallback cpu for read-/write_mem

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In systemmode, current_cpu may not be set.
In such cases use the first cpus memory access methods.
This commit is contained in:
Alwin Berger 2022-11-09 13:35:56 +01:00
parent 5c22f11d17
commit 73ccda8b4b
1 changed files with 6 additions and 2 deletions
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8
libafl_qemu/src/emu.rs
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@ -658,11 +658,15 @@ impl Emulator {
} }
pub unsafe fn write_mem(&self, addr: GuestAddr, buf: &[u8]) { pub unsafe fn write_mem(&self, addr: GuestAddr, buf: &[u8]) {
self.current_cpu().unwrap().write_mem(addr, buf); self.current_cpu()
.unwrap_or(self.cpu_from_index(0))
.write_mem(addr, buf);
} }
pub unsafe fn read_mem(&self, addr: GuestAddr, buf: &mut [u8]) { pub unsafe fn read_mem(&self, addr: GuestAddr, buf: &mut [u8]) {
self.current_cpu().unwrap().read_mem(addr, buf); self.current_cpu()
.unwrap_or(self.cpu_from_index(0))
.read_mem(addr, buf);
} }
#[must_use] #[must_use]