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Distinguish different PT_REGS_PARM4 under x86 (#711)

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1. `PT_REGS_CCALL_PARM4` 表示存放C调用约定的第4个参数的寄存器
2. `PT_REGS_SYSCALL_PARM4` 表示存放linux syscall调用约定的第4个参数的寄存器
3. 将原有 `PT_REGS_PARM4` 改为上述之一
4. 将原有 `ksu_handle_execveat_ksud` 和 `ksu_handle_execveat_sucompat` 可能被
kprobe 传递错误实参、且不使用的形参标记为 never_used 并传递 `NULL`
5. 为 `ksu_handle_execveat_ksud` 提供正确的 argv 参数用以在 x86 下也能正确识别 `init
second_stage`

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Co-authored-by: weishu <twsxtd@gmail.com>
This commit is contained in:
4qwerty7
2023-07-06 09:01:35 +08:00
committed by GitHub
parent 2c0a9cd64c
commit f4d2b0feab
5 changed files with 41 additions and 41 deletions
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4
kernel/kernel_compat.c
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@@ -65,11 +65,11 @@ void ksu_android_ns_fs_check()
if (current->nsproxy && current->fs &&
current->nsproxy->mnt_ns != init_task.nsproxy->mnt_ns) {
android_context_saved_enabled = true;
pr_info("android contex saved enabled due to init mnt_ns(%p) != android mnt_ns(%p)\n",
pr_info("android context saved enabled due to init mnt_ns(%p) != android mnt_ns(%p)\n",
current->nsproxy->mnt_ns, init_task.nsproxy->mnt_ns);
ksu_save_ns_fs(&android_context_saved);
} else {
pr_info("android contex saved disabled\n");
pr_info("android context saved disabled\n");
}
task_unlock(current);
}