This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / x86_64 / ia32 / vsyscall-int80.S

diff --git a/arch/x86_64/ia32/vsyscall-int80.S b/arch/x86_64/ia32/vsyscall-int80.S
new file mode 100644 (file)
index 0000000..00e4148
--- /dev/null
+++ b/arch/x86_64/ia32/vsyscall-int80.S
@@ -0,0 +1,58 @@
+/*
+ * Code for the vsyscall page.  This version uses the old int $0x80 method.
+ *
+ * NOTE:
+ * 1) __kernel_vsyscall _must_ be first in this page.
+ * 2) there are alignment constraints on this stub, see vsyscall-sigreturn.S
+ *    for details.
+ */
+#include <asm/ia32_unistd.h>
+#include <asm/asm-offsets.h>
+
+       .code32
+       .text
+       .section .text.vsyscall,"ax"
+       .globl __kernel_vsyscall
+       .type __kernel_vsyscall,@function
+__kernel_vsyscall:
+.LSTART_vsyscall:
+       int $0x80
+       ret
+.LEND_vsyscall:
+       .size __kernel_vsyscall,.-.LSTART_vsyscall
+       .previous
+
+       .section .eh_frame,"a",@progbits
+.LSTARTFRAME:
+       .long .LENDCIE-.LSTARTCIE
+.LSTARTCIE:
+       .long 0                 /* CIE ID */
+       .byte 1                 /* Version number */
+       .string "zR"            /* NUL-terminated augmentation string */
+       .uleb128 1              /* Code alignment factor */
+       .sleb128 -4             /* Data alignment factor */
+       .byte 8                 /* Return address register column */
+       .uleb128 1              /* Augmentation value length */
+       .byte 0x1b              /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */
+       .byte 0x0c              /* DW_CFA_def_cfa */
+       .uleb128 4
+       .uleb128 4
+       .byte 0x88              /* DW_CFA_offset, column 0x8 */
+       .uleb128 1
+       .align 4
+.LENDCIE:
+
+       .long .LENDFDE1-.LSTARTFDE1     /* Length FDE */
+.LSTARTFDE1:
+       .long .LSTARTFDE1-.LSTARTFRAME  /* CIE pointer */
+       .long .LSTART_vsyscall-.        /* PC-relative start address */
+       .long .LEND_vsyscall-.LSTART_vsyscall
+       .uleb128 0                      /* Augmentation length */
+       .align 4
+.LENDFDE1:
+               
+/*
+ * Get the common code for the sigreturn entry points.
+ */
+#define SYSCALL_ENTER_KERNEL    int $0x80
+#include "vsyscall-sigreturn.S"