diff options
| author | Alexander Potapenko <glider@google.com> | 2025-09-10 15:36:25 +0200 |
|---|---|---|
| committer | Alexander Potapenko <glider@google.com> | 2025-09-11 08:49:06 +0000 |
| commit | 08b12344149080c5f71deae8d8f63662d1a7be2d (patch) | |
| tree | 63473c6b1d61c47e875bf0b50498456a4ec7ef6e /executor/common_kvm_arm64_syzos.h | |
| parent | 4e737d7cdbccc4346473e64ae19614a66c1ddf6b (diff) | |
executor: introduce __no_stack_protector and use it for guest code
When compiling the executor in syz-env-old, -fstack-protector may
kick in and introduce global accesses that tools/check-syzos.sh reports.
To prevent this, introduce the __no_stack_protector macro attribute that
disable stack protection for the function in question, and use it for
guest code.
While at it, factor out some common definitions into common_kvm_syzos.h
Diffstat (limited to 'executor/common_kvm_arm64_syzos.h')
| -rw-r--r-- | executor/common_kvm_arm64_syzos.h | 15 |
1 files changed, 3 insertions, 12 deletions
diff --git a/executor/common_kvm_arm64_syzos.h b/executor/common_kvm_arm64_syzos.h index 41a7f184b..2dd00a146 100644 --- a/executor/common_kvm_arm64_syzos.h +++ b/executor/common_kvm_arm64_syzos.h @@ -3,21 +3,11 @@ // This file provides guest code running inside the ARM64 KVM. +#include "common_kvm_syzos.h" #include "kvm.h" #include <linux/kvm.h> #include <stdbool.h> -// Host will map the code in this section into the guest address space. -#define GUEST_CODE __attribute__((section("guest"))) - -// Prevent function inlining. This attribute is applied to every guest_handle_* function, -// making sure they remain small so that the compiler does not attempt to be too clever -// (e.g. generate switch tables). -#define noinline __attribute__((noinline)) - -// Start/end of the guest section. -extern char *__start_guest, *__stop_guest; - // Compilers will eagerly try to transform the switch statement in guest_main() // into a jump table, unless the cases are sparse enough. // We use prime numbers multiplied by 10 to prevent this behavior. @@ -1201,7 +1191,8 @@ GUEST_CODE static void its_send_movall_cmd(uint64 cmdq_base, uint32 vcpu_id, uin its_send_cmd(cmdq_base, &cmd); } -GUEST_CODE static void its_send_invall_cmd(uint64 cmdq_base, uint32 collection_id) +GUEST_CODE static void +its_send_invall_cmd(uint64 cmdq_base, uint32 collection_id) { struct its_cmd_block cmd; guest_memzero(&cmd, sizeof(cmd)); |