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authorAl Viro <viro@ftp.linux.org.uk>2011-08-18 20:03:19 +0100
committerRichard Weinberger <richard@nod.at>2011-11-02 14:14:51 +0100
commit6582b7f7743da6ce3e3714e9e8b18e0e073d4acd (patch)
tree649346d2333865ccd4bb4d560ceb50c39139c5c2 /arch/um/sys-x86_64/stub.S
parentum: merge arch/um/sys-{i386,x86_64}/shared (diff)
downloadlinux-dev-6582b7f7743da6ce3e3714e9e8b18e0e073d4acd.tar.xz
linux-dev-6582b7f7743da6ce3e3714e9e8b18e0e073d4acd.zip
um: merge arch/um/sys-{i386,x86_64}
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/sys-x86_64/stub.S')
-rw-r--r--arch/um/sys-x86_64/stub.S66
1 files changed, 0 insertions, 66 deletions
diff --git a/arch/um/sys-x86_64/stub.S b/arch/um/sys-x86_64/stub.S
deleted file mode 100644
index 20e4a96a6dcb..000000000000
--- a/arch/um/sys-x86_64/stub.S
+++ /dev/null
@@ -1,66 +0,0 @@
-#include "as-layout.h"
-
- .globl syscall_stub
-.section .__syscall_stub, "ax"
-syscall_stub:
- syscall
- /* We don't have 64-bit constants, so this constructs the address
- * we need.
- */
- movq $(STUB_DATA >> 32), %rbx
- salq $32, %rbx
- movq $(STUB_DATA & 0xffffffff), %rcx
- or %rcx, %rbx
- movq %rax, (%rbx)
- int3
-
- .globl batch_syscall_stub
-batch_syscall_stub:
- mov $(STUB_DATA >> 32), %rbx
- sal $32, %rbx
- mov $(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