查阅内核代码,发现entry_SYSCALL_64_after_hwframe是从entry_SYSCALL_64开始执行的代码中的标号。因为从entry_SYSCALL_64到entry_SYSCALL_64_after_hwframe的过程中并没有类似于call这样的调用指令,这么说系统调用的入口是从netry_SYSCALL_64开始的。 继续用qemu打个断点看看,毕竟可以看到entry_SYSCALL_64_safe_stack...
内核make生成“ld: arch/x86/entry/syscall_64.o:(.rodata+0xdc0)：未定义的对`__x64_sys_s_e...
* ti flags, and ti status came from the 64-bit SYSCALL fast path, * the slow path, or one of the ia32entry paths.* Use int_ret_from_sys_call to return, since it can safely handle * all of the above.*/ jmpint_ret_from_sys_call 1...
entry_64_compat.S entry_64_fred.S entry_fred.c syscall_32.c syscall_64.c syscall_x32.c thunk.S events hyperv ia32 include kernel kvm lib math-emu mm net pci platform power purgatory ras realmode tools um video virt xen .gitignore ...
The Linux x86 syscall ABI is as far as I know documented "officially" in entry_SYSCALL_64() in the entry code itself (We use %eXX instead of %rXX here since the machine code is slightly shorter; setting %eXX to 0 will also clear the upper 32 bits of %rXX). We can build this ...
[inline] setxattr+0x6ae/0x790 fs/xattr.c:449 path_setxattr+0x1eb/0x380 fs/xattr.c:468 SYSC_lsetxattr+0x8d/0xb0 fs/xattr.c:490 SyS_lsetxattr+0x77/0xa0 fs/xattr.c:486 entry_SYSCALL_64_fastpath+0x13/0x94 origin: save_stack_trace+0x37/0x40 arch/x86/kernel/stacktrace.c:59 kmsan...
若是syscall,则调用对应的系统调用 若是设备中断,则跳转到响应的处理代码 若是page fault,则杀死进程 最后执行 usertrapret() 函数 提一个特别的细节:uservec 中切换了页表,在切换之前使用的是 user page table,所以 trapframe page 在 user page table 中映射到了物理内存的某个 page 中;切换页表后,到了 us...
64:CALL(sys_umount) 65:CALL(sys_ni_syscall)/* was sys_lock */ 66:CALL(sys_ioctl) 67:/* 55 */CALL(sys_fcntl) 68:CALL(sys_ni_syscall)/* was sys_mpx */ 69:CALL(sys_setpgid) 70:CALL(sys_ni_syscall)/* was sys_ulimit */ ...
[4816637.612850] __x64_sys_unshare+0xe/0x20 [4816637.612857] do_syscall_64+0x5b/0x1a0 [4816637.612864] entry_SYSCALL_64_after_hwframe+0x65/0xca [4816637.612867] RIP: 0033:0x7fa603bcbc0b [4816637.612870] Code: 73 01 c3 48 8b 0d 7d f2 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66...
若是syscall,则调用对应的系统调用 若是设备中断,则跳转到响应的处理代码 若是page fault,则杀死进程 最后执行 usertrapret() 函数 image-20230817165937018 提一个特别的细节:uservec 中切换了页表,在切换之前使用的是 user page table,所以 trapframe page 在 user page table 中映射到了物理内存的某个 page 中...