projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| d67b569f JD |
1 | #include "uml-config.h" |
| 2 | ||
| 3 | .globl syscall_stub | |
| 4 | .section .__syscall_stub, "x" | |
| c5600490 JD |
5 | |
| 6 | .globl batch_syscall_stub | |
| 7 | batch_syscall_stub: | |
| 07bf731e BS |
8 | /* load pointer to first operation */ |
| 9 | mov $(UML_CONFIG_STUB_DATA+8), %esp | |
| 10 | ||
| 11 | again: | |
| 12 | /* load length of additional data */ | |
| 13 | mov 0x0(%esp), %eax | |
| 14 | ||
| 15 | /* if(length == 0) : end of list */ | |
| 16 | /* write possible 0 to header */ | |
| 17 | mov %eax, UML_CONFIG_STUB_DATA+4 | |
| c5600490 JD |
18 | cmpl $0, %eax |
| 19 | jz done | |
| 07bf731e BS |
20 | |
| 21 | /* save current pointer */ | |
| 22 | mov %esp, UML_CONFIG_STUB_DATA+4 | |
| 23 | ||
| 24 | /* skip additional data */ | |
| 25 | add %eax, %esp | |
| 26 | ||
| 27 | /* load syscall-# */ | |
| 28 | pop %eax | |
| 29 | ||
| 30 | /* load syscall params */ | |
| c5600490 JD |
31 | pop %ebx |
| 32 | pop %ecx | |
| 33 | pop %edx | |
| 34 | pop %esi | |
| 35 | pop %edi | |
| 36 | pop %ebp | |
| 07bf731e BS |
37 | |
| 38 | /* execute syscall */ | |
| c5600490 | 39 | int $0x80 |
| 07bf731e BS |
40 | |
| 41 | /* check return value */ | |
| 42 | pop %ebx | |
| 43 | cmp %ebx, %eax | |
| 44 | je again | |
| 45 | ||
| 46 | done: | |
| 47 | /* save return value */ | |
| c5600490 | 48 | mov %eax, UML_CONFIG_STUB_DATA |
| 07bf731e BS |
49 | |
| 50 | /* stop */ | |
| 51 | int3 |