10213903403
/
os_kernel_lab
1
0
Fork 0
Code Issues 0 Pull Requests 0 Releases 0 Wiki Activity
《操作系统》的实验代码。
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
348 Commits
2 Branches
52 MiB
Tree: 7a698a8313
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '7a698a8313'
${ noResults }
os_kernel_lab/labcodes/lab5/user/libs/initcode.S

14 lines
241 B
Raw Normal View History

initial version
12 years ago
​
​
​
​
​
​
​
​
​
​
​
​
​
 
  1. .text
  2. .globl _start
  3. _start:
  4.     # set ebp for backtrace

  5.     movl $0x0, %ebp
  6. 

  7.     # move down the esp register

  8.     # since it may cause page fault in backtrace

  9.     subl $0x20, %esp
  10. 

  11.     # call user-program function

  12.     call umain
  13. 1:  jmp 1b
  14.