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| author | Len Brown <len.brown@intel.com> | 2005-09-08 01:45:47 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2005-09-08 01:45:47 -0400 |
| commit | 64e47488c913ac704d465a6af86a26786d1412a5 (patch) | |
| tree | d3b0148592963dcde26e4bb35ddfec8b1eaf8e23 /arch/um/sys-x86_64/stub.S | |
| parent | 4a35a46bf1cda4737c428380d1db5d15e2590d18 (diff) | |
| parent | caf39e87cc1182f7dae84eefc43ca14d54c78ef9 (diff) | |
| download | op-kernel-dev-64e47488c913ac704d465a6af86a26786d1412a5.zip op-kernel-dev-64e47488c913ac704d465a6af86a26786d1412a5.tar.gz | |
Merge linux-2.6 with linux-acpi-2.6
Diffstat (limited to 'arch/um/sys-x86_64/stub.S')
| -rw-r--r-- | arch/um/sys-x86_64/stub.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/um/sys-x86_64/stub.S b/arch/um/sys-x86_64/stub.S index 31c1492..03c2797 100644 --- a/arch/um/sys-x86_64/stub.S +++ b/arch/um/sys-x86_64/stub.S @@ -13,3 +13,54 @@ syscall_stub: or %rcx, %rbx movq %rax, (%rbx) int3 + + .globl batch_syscall_stub +batch_syscall_stub: + mov $(UML_CONFIG_STUB_DATA >> 32), %rbx + sal $32, %rbx + mov $(UML_CONFIG_STUB_DATA & 0xffffffff), %rax + or %rax, %rbx + /* load pointer to first operation */ + mov %rbx, %rsp + add $0x10, %rsp +again: + /* load length of additional data */ + mov 0x0(%rsp), %rax + + /* if(length == 0) : end of list */ + /* write possible 0 to header */ + mov %rax, 8(%rbx) + cmp $0, %rax + jz done + + /* save current pointer */ + mov %rsp, 8(%rbx) + + /* skip additional data */ + add %rax, %rsp + + /* load syscall-# */ + pop %rax + + /* load syscall params */ + pop %rdi + pop %rsi + pop %rdx + pop %r10 + pop %r8 + pop %r9 + + /* execute syscall */ + syscall + + /* check return value */ + pop %rcx + cmp %rcx, %rax + je again + +done: + /* save return value */ + mov %rax, (%rbx) + + /* stop */ + int3 |
