1 files changed, 12 insertions, 69 deletions
diff --git a/src/internal/i386/syscall.s b/src/internal/i386/syscall.s
index 0ebf2218..004ddfef 100644
--- a/src/internal/i386/syscall.s
+++ b/src/internal/i386/syscall.s
@@ -1,78 +1,21 @@
-.hidden __sysinfo
-
-# The calling convention for __vsyscall has the syscall number
-# and 5 args arriving as:  eax, edx, ecx, edi, esi, 4(%esp).
-# This ensures that the inline asm in the C code never has to touch
-# ebx or ebp (which are unavailable in PIC and frame-pointer-using
-# code, respectively), and optimizes for size/simplicity in the caller.
-
-.global __vsyscall
-.hidden __vsyscall
-.type __vsyscall,@function
-__vsyscall:
-	push %edi
-	push %ebx
-	mov %edx,%ebx
-	mov %edi,%edx
-	mov 12(%esp),%edi
-	push %eax
-	call 1f
-2:	mov %ebx,%edx
-	pop %ebx
-	pop %ebx
-	pop %edi
-	ret
-
-1:	mov (%esp),%eax
-	add $[__sysinfo-2b],%eax
-	mov (%eax),%eax
-	test %eax,%eax
-	jz 1f
-	push %eax
-	mov 8(%esp),%eax
-	ret                     # tail call to kernel vsyscall entry
-1:	mov 4(%esp),%eax
-	int $128
-	ret
-
-# The __vsyscall6 entry point is used only for 6-argument syscalls.
-# Instead of passing the 5th argument on the stack, a pointer to the
-# 5th and 6th arguments is passed. This is ugly, but there are no
-# register constraints the inline asm could use that would make it
-# possible to pass two arguments on the stack.
-
-.global __vsyscall6
-.hidden __vsyscall6
-.type __vsyscall6,@function
-__vsyscall6:
-	push %ebp
-	push %eax
-	mov 12(%esp), %ebp
-	mov (%ebp), %eax
-	mov 4(%ebp), %ebp
-	push %eax
-	mov 4(%esp),%eax
-	call __vsyscall
-	pop %ebp
-	pop %ebp
-	pop %ebp
-	ret
-
 .global __syscall
 .hidden __syscall
 .type __syscall,@function
 __syscall:
-	lea 24(%esp),%eax
+	push %ebx
 	push %esi
 	push %edi
-	push %eax
-	mov 16(%esp),%eax
-	mov 20(%esp),%edx
-	mov 24(%esp),%ecx
-	mov 28(%esp),%edi
-	mov 32(%esp),%esi
-	call __vsyscall6
-	pop %edi
+	push %ebp
+	mov 20(%esp),%eax
+	mov 24(%esp),%ebx
+	mov 28(%esp),%ecx
+	mov 32(%esp),%edx
+	mov 36(%esp),%esi
+	mov 40(%esp),%edi
+	mov 44(%esp),%ebp
+	call *%gs:16
+	pop %ebp
 	pop %edi
 	pop %esi
+	pop %ebx
 	ret