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| author | Alexander Potapenko <glider@google.com> | 2024-12-18 10:48:43 +0100 |
|---|---|---|
| committer | Alexander Potapenko <glider@google.com> | 2024-12-18 13:04:48 +0000 |
| commit | 7279033500a8ac2d5d0a429cb20dd7c2c9cd547e (patch) | |
| tree | 4dc93adc4664074af36fe9b9e4f58b611e278a9b /executor/common_kvm_arm64.h | |
| parent | a0626d3a05d5e31af100787b6749f0b89416c171 (diff) | |
executor: pkg/vminfo: sys/linux: arm64: implement syz_kvm_assert_reg()
Add a pseudo-syscall to assert on register values.
Diffstat (limited to 'executor/common_kvm_arm64.h')
| -rw-r--r-- | executor/common_kvm_arm64.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/executor/common_kvm_arm64.h b/executor/common_kvm_arm64.h index 02e84aad8..6feec78ab 100644 --- a/executor/common_kvm_arm64.h +++ b/executor/common_kvm_arm64.h @@ -380,3 +380,22 @@ static long syz_kvm_assert_syzos_uexit(volatile long a0, volatile long a1) return 0; } #endif + +#if SYZ_EXECUTOR || __NR_syz_kvm_assert_reg +static long syz_kvm_assert_reg(volatile long a0, volatile long a1, volatile long a2) +{ + int vcpu_fd = (int)a0; + uint64 id = (uint64)a1; + uint64 expect = a2, val = 0; + + struct kvm_one_reg reg = {.id = id, .addr = (uint64)&val}; + int ret = ioctl(vcpu_fd, KVM_GET_ONE_REG, ®); + if (ret) + return ret; + if (val != expect) { + errno = EDOM; + return -1; + } + return 0; +} +#endif |