executor: sys/linux: SYZOS: add AMD SET_INTERCEPT primitive

This patch introduces SYZOS_API_NESTED_AMD_SET_INTERCEPT to SYZOS.

This primitive enables the fuzzer to surgically modify intercept vectors
in the AMD VMCB (Virtual Machine Control Block) Control Area.
It implements a read-modify-write operation on 32-bit VMCB offsets,
allowing the L1 hypervisor (SYZOS) to deterministically set or clear
specific intercept bits (e.g., for RDTSC, HLT, or exceptions) for the L2
guest.

This capability allows syzkaller to systematically explore KVM's nested
SVM emulation logic by toggling intercepts on and off, rather than
relying on static defaults or random memory corruption.

0 files changed, 0 insertions, 0 deletions