| Jeff Dike | d67b569 | 2005-07-07 17:56:49 -0700 | [diff] [blame] | 1 | #include "uml-config.h" |
| 2 | |
| 3 | .globl syscall_stub |
| 4 | .section .__syscall_stub, "x" |
| 5 | syscall_stub: |
| 6 | syscall |
| 7 | /* We don't have 64-bit constants, so this constructs the address |
| 8 | * we need. |
| 9 | */ |
| 10 | movq $(UML_CONFIG_STUB_DATA >> 32), %rbx |
| 11 | salq $32, %rbx |
| 12 | movq $(UML_CONFIG_STUB_DATA & 0xffffffff), %rcx |
| 13 | or %rcx, %rbx |
| 14 | movq %rax, (%rbx) |
| 15 | int3 |
| Jeff Dike | c560049 | 2005-09-03 15:57:36 -0700 | [diff] [blame] | 16 | |
| 17 | .globl batch_syscall_stub |
| 18 | batch_syscall_stub: |
| 19 | movq $(UML_CONFIG_STUB_DATA >> 32), %rbx |
| 20 | salq $32, %rbx |
| 21 | movq $(UML_CONFIG_STUB_DATA & 0xffffffff), %rcx |
| 22 | or %rcx, %rbx |
| 23 | movq %rbx, %rsp |
| 24 | again: pop %rax |
| 25 | cmpq $0, %rax |
| 26 | jz done |
| 27 | pop %rdi |
| 28 | pop %rsi |
| 29 | pop %rdx |
| 30 | pop %r10 |
| 31 | pop %r8 |
| 32 | pop %r9 |
| 33 | syscall |
| 34 | mov %rax, (%rbx) |
| 35 | jmp again |
| 36 | done: int3 |