Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=0c2f51a7d2546f65e4198cccd6a56e2a8b857677
Commit:     0c2f51a7d2546f65e4198cccd6a56e2a8b857677
Parent:     108b545137b03ec1d6a5765017d57f86056bf57c
Author:     Roland McGrath <[EMAIL PROTECTED]>
AuthorDate: Wed Jan 30 13:30:42 2008 +0100
Committer:  Ingo Molnar <[EMAIL PROTECTED]>
CommitDate: Wed Jan 30 13:30:42 2008 +0100

    x86 vDSO: arch/x86/vdso/vdso32
    
    This moves the i386 vDSO sources into arch/x86/vdso/vdso32/, a
    new directory.  This patch is a pure renaming, but paves the way
    for consolidating the vDSO build logic.
    
    Signed-off-by: Roland McGrath <[EMAIL PROTECTED]>
    Cc: Andrew Morton <[EMAIL PROTECTED]>
    Cc: Linus Torvalds <[EMAIL PROTECTED]>
    Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
    Signed-off-by: Ingo Molnar <[EMAIL PROTECTED]>
    Signed-off-by: Thomas Gleixner <[EMAIL PROTECTED]>
---
 arch/x86/ia32/vsyscall-sigreturn.S      |    3 +-
 arch/x86/kernel/Makefile_32             |    3 +
 arch/x86/kernel/vsyscall-int80_32.S     |   53 -----------
 arch/x86/kernel/vsyscall-note_32.S      |   45 ----------
 arch/x86/kernel/vsyscall-sigreturn_32.S |  143 -------------------------------
 arch/x86/kernel/vsyscall-sysenter_32.S  |  122 --------------------------
 arch/x86/vdso/vdso32/int80.S            |   53 +++++++++++
 arch/x86/vdso/vdso32/note.S             |   45 ++++++++++
 arch/x86/vdso/vdso32/sigreturn.S        |  143 +++++++++++++++++++++++++++++++
 arch/x86/vdso/vdso32/sysenter.S         |  122 ++++++++++++++++++++++++++
 10 files changed, 367 insertions(+), 365 deletions(-)

diff --git a/arch/x86/ia32/vsyscall-sigreturn.S 
b/arch/x86/ia32/vsyscall-sigreturn.S
index b383be0..295eecf 100644
--- a/arch/x86/ia32/vsyscall-sigreturn.S
+++ b/arch/x86/ia32/vsyscall-sigreturn.S
@@ -139,5 +139,4 @@ __kernel_rt_sigreturn:
        .align 4
 .LENDFDE3:
 
-#include "../../x86/kernel/vsyscall-note_32.S"
-
+#include "../vdso/vdso32/note.S"
diff --git a/arch/x86/kernel/Makefile_32 b/arch/x86/kernel/Makefile_32
index eb2da53..f7c1c1c 100644
--- a/arch/x86/kernel/Makefile_32
+++ b/arch/x86/kernel/Makefile_32
@@ -56,6 +56,9 @@ $(obj)/vsyscall_32.o: $(obj)/vsyscall-int80_32.so 
$(obj)/vsyscall-sysenter_32.so
 targets += $(foreach F,int80 sysenter,vsyscall-$F_32.o vsyscall-$F_32.so)
 targets += vsyscall-note_32.o vsyscall_32.lds
 
+$(obj)/vsyscall-%_32.o: $(src)/../vdso/vdso32/%.S
+       $(call if_changed_dep,as_o_S)
+
 # The DSO images are built using a special linker script.
 quiet_cmd_syscall = SYSCALL $@
       cmd_syscall = $(CC) -m elf_i386 -nostdlib $(SYSCFLAGS_$(@F)) \
diff --git a/arch/x86/kernel/vsyscall-int80_32.S 
b/arch/x86/kernel/vsyscall-int80_32.S
deleted file mode 100644
index 103cab6..0000000
--- a/arch/x86/kernel/vsyscall-int80_32.S
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * 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.
- */
-
-       .text
-       .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
-.LSTARTFRAMEDLSI:
-       .long .LENDCIEDLSI-.LSTARTCIEDLSI
-.LSTARTCIEDLSI:
-       .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
-.LENDCIEDLSI:
-       .long .LENDFDEDLSI-.LSTARTFDEDLSI /* Length FDE */
-.LSTARTFDEDLSI:
-       .long .LSTARTFDEDLSI-.LSTARTFRAMEDLSI /* CIE pointer */
-       .long .LSTART_vsyscall-.        /* PC-relative start address */
-       .long .LEND_vsyscall-.LSTART_vsyscall
-       .uleb128 0
-       .align 4
-.LENDFDEDLSI:
-       .previous
-
-/*
- * Get the common code for the sigreturn entry points.
- */
-#include "vsyscall-sigreturn_32.S"
diff --git a/arch/x86/kernel/vsyscall-note_32.S 
b/arch/x86/kernel/vsyscall-note_32.S
deleted file mode 100644
index fcf376a..0000000
--- a/arch/x86/kernel/vsyscall-note_32.S
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
- * Here we can supply some information useful to userland.
- */
-
-#include <linux/version.h>
-#include <linux/elfnote.h>
-
-/* Ideally this would use UTS_NAME, but using a quoted string here
-   doesn't work. Remember to change this when changing the
-   kernel's name. */
-ELFNOTE_START(Linux, 0, "a")
-       .long LINUX_VERSION_CODE
-ELFNOTE_END
-
-#ifdef CONFIG_XEN
-/*
- * Add a special note telling glibc's dynamic linker a fake hardware
- * flavor that it will use to choose the search path for libraries in the
- * same way it uses real hardware capabilities like "mmx".
- * We supply "nosegneg" as the fake capability, to indicate that we
- * do not like negative offsets in instructions using segment overrides,
- * since we implement those inefficiently.  This makes it possible to
- * install libraries optimized to avoid those access patterns in someplace
- * like /lib/i686/tls/nosegneg.  Note that an /etc/ld.so.conf.d/file
- * corresponding to the bits here is needed to make ldconfig work right.
- * It should contain:
- *     hwcap 1 nosegneg
- * to match the mapping of bit to name that we give here.
- *
- * At runtime, the fake hardware feature will be considered to be present
- * if its bit is set in the mask word.  So, we start with the mask 0, and
- * at boot time we set VDSO_NOTE_NONEGSEG_BIT if running under Xen.
- */
-
-#include "../../x86/xen/vdso.h"        /* Defines VDSO_NOTE_NONEGSEG_BIT.  */
-
-       .globl VDSO_NOTE_MASK
-ELFNOTE_START(GNU, 2, "a")
-       .long 1                 /* ncaps */
-VDSO_NOTE_MASK:
-       .long 0                 /* mask */
-       .byte VDSO_NOTE_NONEGSEG_BIT; .asciz "nosegneg" /* bit, name */
-ELFNOTE_END
-#endif
diff --git a/arch/x86/kernel/vsyscall-sigreturn_32.S 
b/arch/x86/kernel/vsyscall-sigreturn_32.S
deleted file mode 100644
index e939253..0000000
--- a/arch/x86/kernel/vsyscall-sigreturn_32.S
+++ /dev/null
@@ -1,143 +0,0 @@
-/*
- * Common code for the sigreturn entry points on the vsyscall page.
- * So far this code is the same for both int80 and sysenter versions.
- * This file is #include'd by vsyscall-*.S to define them after the
- * vsyscall entry point.  The kernel assumes that the addresses of these
- * routines are constant for all vsyscall implementations.
- */
-
-#include <asm/unistd.h>
-#include <asm/asm-offsets.h>
-
-
-/* XXX
-   Should these be named "_sigtramp" or something?
-*/
-
-       .text
-       .org __kernel_vsyscall+32,0x90
-       .globl __kernel_sigreturn
-       .type __kernel_sigreturn,@function
-__kernel_sigreturn:
-.LSTART_sigreturn:
-       popl %eax               /* XXX does this mean it needs unwind info? */
-       movl $__NR_sigreturn, %eax
-       int $0x80
-.LEND_sigreturn:
-       .size __kernel_sigreturn,.-.LSTART_sigreturn
-
-       .balign 32
-       .globl __kernel_rt_sigreturn
-       .type __kernel_rt_sigreturn,@function
-__kernel_rt_sigreturn:
-.LSTART_rt_sigreturn:
-       movl $__NR_rt_sigreturn, %eax
-       int $0x80
-.LEND_rt_sigreturn:
-       .size __kernel_rt_sigreturn,.-.LSTART_rt_sigreturn
-       .balign 32
-       .previous
-
-       .section .eh_frame,"a",@progbits
-.LSTARTFRAMEDLSI1:
-       .long .LENDCIEDLSI1-.LSTARTCIEDLSI1
-.LSTARTCIEDLSI1:
-       .long 0                 /* CIE ID */
-       .byte 1                 /* Version number */
-       .string "zRS"           /* 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 0                 /* DW_CFA_nop */
-       .align 4
-.LENDCIEDLSI1:
-       .long .LENDFDEDLSI1-.LSTARTFDEDLSI1 /* Length FDE */
-.LSTARTFDEDLSI1:
-       .long .LSTARTFDEDLSI1-.LSTARTFRAMEDLSI1 /* CIE pointer */
-       /* HACK: The dwarf2 unwind routines will subtract 1 from the
-          return address to get an address in the middle of the
-          presumed call instruction.  Since we didn't get here via
-          a call, we need to include the nop before the real start
-          to make up for it.  */
-       .long .LSTART_sigreturn-1-.     /* PC-relative start address */
-       .long .LEND_sigreturn-.LSTART_sigreturn+1
-       .uleb128 0                      /* Augmentation */
-       /* What follows are the instructions for the table generation.
-          We record the locations of each register saved.  This is
-          complicated by the fact that the "CFA" is always assumed to
-          be the value of the stack pointer in the caller.  This means
-          that we must define the CFA of this body of code to be the
-          saved value of the stack pointer in the sigcontext.  Which
-          also means that there is no fixed relation to the other 
-          saved registers, which means that we must use DW_CFA_expression
-          to compute their addresses.  It also means that when we 
-          adjust the stack with the popl, we have to do it all over again.  */
-
-#define do_cfa_expr(offset)                                            \
-       .byte 0x0f;                     /* DW_CFA_def_cfa_expression */ \
-       .uleb128 1f-0f;                 /*   length */                  \
-0:     .byte 0x74;                     /*     DW_OP_breg4 */           \
-       .sleb128 offset;                /*      offset */               \
-       .byte 0x06;                     /*     DW_OP_deref */           \
-1:
-
-#define do_expr(regno, offset)                                         \
-       .byte 0x10;                     /* DW_CFA_expression */         \
-       .uleb128 regno;                 /*   regno */                   \
-       .uleb128 1f-0f;                 /*   length */                  \
-0:     .byte 0x74;                     /*     DW_OP_breg4 */           \
-       .sleb128 offset;                /*       offset */              \
-1:
-
-       do_cfa_expr(IA32_SIGCONTEXT_esp+4)
-       do_expr(0, IA32_SIGCONTEXT_eax+4)
-       do_expr(1, IA32_SIGCONTEXT_ecx+4)
-       do_expr(2, IA32_SIGCONTEXT_edx+4)
-       do_expr(3, IA32_SIGCONTEXT_ebx+4)
-       do_expr(5, IA32_SIGCONTEXT_ebp+4)
-       do_expr(6, IA32_SIGCONTEXT_esi+4)
-       do_expr(7, IA32_SIGCONTEXT_edi+4)
-       do_expr(8, IA32_SIGCONTEXT_eip+4)
-
-       .byte 0x42      /* DW_CFA_advance_loc 2 -- nop; popl eax. */
-
-       do_cfa_expr(IA32_SIGCONTEXT_esp)
-       do_expr(0, IA32_SIGCONTEXT_eax)
-       do_expr(1, IA32_SIGCONTEXT_ecx)
-       do_expr(2, IA32_SIGCONTEXT_edx)
-       do_expr(3, IA32_SIGCONTEXT_ebx)
-       do_expr(5, IA32_SIGCONTEXT_ebp)
-       do_expr(6, IA32_SIGCONTEXT_esi)
-       do_expr(7, IA32_SIGCONTEXT_edi)
-       do_expr(8, IA32_SIGCONTEXT_eip)
-
-       .align 4
-.LENDFDEDLSI1:
-
-       .long .LENDFDEDLSI2-.LSTARTFDEDLSI2 /* Length FDE */
-.LSTARTFDEDLSI2:
-       .long .LSTARTFDEDLSI2-.LSTARTFRAMEDLSI1 /* CIE pointer */
-       /* HACK: See above wrt unwind library assumptions.  */
-       .long .LSTART_rt_sigreturn-1-.  /* PC-relative start address */
-       .long .LEND_rt_sigreturn-.LSTART_rt_sigreturn+1
-       .uleb128 0                      /* Augmentation */
-       /* What follows are the instructions for the table generation.
-          We record the locations of each register saved.  This is
-          slightly less complicated than the above, since we don't
-          modify the stack pointer in the process.  */
-
-       do_cfa_expr(IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_esp)
-       do_expr(0, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_eax)
-       do_expr(1, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_ecx)
-       do_expr(2, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_edx)
-       do_expr(3, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_ebx)
-       do_expr(5, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_ebp)
-       do_expr(6, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_esi)
-       do_expr(7, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_edi)
-       do_expr(8, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_eip)
-
-       .align 4
-.LENDFDEDLSI2:
-       .previous
diff --git a/arch/x86/kernel/vsyscall-sysenter_32.S 
b/arch/x86/kernel/vsyscall-sysenter_32.S
deleted file mode 100644
index ed879bf..0000000
--- a/arch/x86/kernel/vsyscall-sysenter_32.S
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
- * Code for the vsyscall page.  This version uses the sysenter instruction.
- *
- * NOTE:
- * 1) __kernel_vsyscall _must_ be first in this page.
- * 2) there are alignment constraints on this stub, see vsyscall-sigreturn.S
- *    for details.
- */
-
-/*
- * The caller puts arg2 in %ecx, which gets pushed. The kernel will use
- * %ecx itself for arg2. The pushing is because the sysexit instruction
- * (found in entry.S) requires that we clobber %ecx with the desired %esp.
- * User code might expect that %ecx is unclobbered though, as it would be
- * for returning via the iret instruction, so we must push and pop.
- *
- * The caller puts arg3 in %edx, which the sysexit instruction requires
- * for %eip. Thus, exactly as for arg2, we must push and pop.
- *
- * Arg6 is different. The caller puts arg6 in %ebp. Since the sysenter
- * instruction clobbers %esp, the user's %esp won't even survive entry
- * into the kernel. We store %esp in %ebp. Code in entry.S must fetch
- * arg6 from the stack.
- *
- * You can not use this vsyscall for the clone() syscall because the
- * three dwords on the parent stack do not get copied to the child.
- */
-       .text
-       .globl __kernel_vsyscall
-       .type __kernel_vsyscall,@function
-__kernel_vsyscall:
-.LSTART_vsyscall:
-       push %ecx
-.Lpush_ecx:
-       push %edx
-.Lpush_edx:
-       push %ebp
-.Lenter_kernel:
-       movl %esp,%ebp
-       sysenter
-
-       /* 7: align return point with nop's to make disassembly easier */
-       .space 7,0x90
-
-       /* 14: System call restart point is here! (SYSENTER_RETURN-2) */
-       jmp .Lenter_kernel
-       /* 16: System call normal return point is here! */
-       .globl SYSENTER_RETURN  /* Symbol used by sysenter.c  */
-SYSENTER_RETURN:
-       pop %ebp
-.Lpop_ebp:
-       pop %edx
-.Lpop_edx:
-       pop %ecx
-.Lpop_ecx:
-       ret
-.LEND_vsyscall:
-       .size __kernel_vsyscall,.-.LSTART_vsyscall
-       .previous
-
-       .section .eh_frame,"a",@progbits
-.LSTARTFRAMEDLSI:
-       .long .LENDCIEDLSI-.LSTARTCIEDLSI
-.LSTARTCIEDLSI:
-       .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
-.LENDCIEDLSI:
-       .long .LENDFDEDLSI-.LSTARTFDEDLSI /* Length FDE */
-.LSTARTFDEDLSI:
-       .long .LSTARTFDEDLSI-.LSTARTFRAMEDLSI /* CIE pointer */
-       .long .LSTART_vsyscall-.        /* PC-relative start address */
-       .long .LEND_vsyscall-.LSTART_vsyscall
-       .uleb128 0
-       /* What follows are the instructions for the table generation.
-          We have to record all changes of the stack pointer.  */
-       .byte 0x04              /* DW_CFA_advance_loc4 */
-       .long .Lpush_ecx-.LSTART_vsyscall
-       .byte 0x0e              /* DW_CFA_def_cfa_offset */
-       .byte 0x08              /* RA at offset 8 now */
-       .byte 0x04              /* DW_CFA_advance_loc4 */
-       .long .Lpush_edx-.Lpush_ecx
-       .byte 0x0e              /* DW_CFA_def_cfa_offset */
-       .byte 0x0c              /* RA at offset 12 now */
-       .byte 0x04              /* DW_CFA_advance_loc4 */
-       .long .Lenter_kernel-.Lpush_edx
-       .byte 0x0e              /* DW_CFA_def_cfa_offset */
-       .byte 0x10              /* RA at offset 16 now */
-       .byte 0x85, 0x04        /* DW_CFA_offset %ebp -16 */
-       /* Finally the epilogue.  */
-       .byte 0x04              /* DW_CFA_advance_loc4 */
-       .long .Lpop_ebp-.Lenter_kernel
-       .byte 0x0e              /* DW_CFA_def_cfa_offset */
-       .byte 0x0c              /* RA at offset 12 now */
-       .byte 0xc5              /* DW_CFA_restore %ebp */
-       .byte 0x04              /* DW_CFA_advance_loc4 */
-       .long .Lpop_edx-.Lpop_ebp
-       .byte 0x0e              /* DW_CFA_def_cfa_offset */
-       .byte 0x08              /* RA at offset 8 now */
-       .byte 0x04              /* DW_CFA_advance_loc4 */
-       .long .Lpop_ecx-.Lpop_edx
-       .byte 0x0e              /* DW_CFA_def_cfa_offset */
-       .byte 0x04              /* RA at offset 4 now */
-       .align 4
-.LENDFDEDLSI:
-       .previous
-
-/*
- * Get the common code for the sigreturn entry points.
- */
-#include "vsyscall-sigreturn_32.S"
diff --git a/arch/x86/vdso/vdso32/int80.S b/arch/x86/vdso/vdso32/int80.S
new file mode 100644
index 0000000..3c8e4c6
--- /dev/null
+++ b/arch/x86/vdso/vdso32/int80.S
@@ -0,0 +1,53 @@
+/*
+ * 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.
+ */
+
+       .text
+       .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
+.LSTARTFRAMEDLSI:
+       .long .LENDCIEDLSI-.LSTARTCIEDLSI
+.LSTARTCIEDLSI:
+       .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
+.LENDCIEDLSI:
+       .long .LENDFDEDLSI-.LSTARTFDEDLSI /* Length FDE */
+.LSTARTFDEDLSI:
+       .long .LSTARTFDEDLSI-.LSTARTFRAMEDLSI /* CIE pointer */
+       .long .LSTART_vsyscall-.        /* PC-relative start address */
+       .long .LEND_vsyscall-.LSTART_vsyscall
+       .uleb128 0
+       .align 4
+.LENDFDEDLSI:
+       .previous
+
+/*
+ * Get the common code for the sigreturn entry points.
+ */
+#include "sigreturn.S"
diff --git a/arch/x86/vdso/vdso32/note.S b/arch/x86/vdso/vdso32/note.S
new file mode 100644
index 0000000..0cf934f
--- /dev/null
+++ b/arch/x86/vdso/vdso32/note.S
@@ -0,0 +1,45 @@
+/*
+ * This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
+ * Here we can supply some information useful to userland.
+ */
+
+#include <linux/version.h>
+#include <linux/elfnote.h>
+
+/* Ideally this would use UTS_NAME, but using a quoted string here
+   doesn't work. Remember to change this when changing the
+   kernel's name. */
+ELFNOTE_START(Linux, 0, "a")
+       .long LINUX_VERSION_CODE
+ELFNOTE_END
+
+#ifdef CONFIG_XEN
+/*
+ * Add a special note telling glibc's dynamic linker a fake hardware
+ * flavor that it will use to choose the search path for libraries in the
+ * same way it uses real hardware capabilities like "mmx".
+ * We supply "nosegneg" as the fake capability, to indicate that we
+ * do not like negative offsets in instructions using segment overrides,
+ * since we implement those inefficiently.  This makes it possible to
+ * install libraries optimized to avoid those access patterns in someplace
+ * like /lib/i686/tls/nosegneg.  Note that an /etc/ld.so.conf.d/file
+ * corresponding to the bits here is needed to make ldconfig work right.
+ * It should contain:
+ *     hwcap 1 nosegneg
+ * to match the mapping of bit to name that we give here.
+ *
+ * At runtime, the fake hardware feature will be considered to be present
+ * if its bit is set in the mask word.  So, we start with the mask 0, and
+ * at boot time we set VDSO_NOTE_NONEGSEG_BIT if running under Xen.
+ */
+
+#include "../../xen/vdso.h"    /* Defines VDSO_NOTE_NONEGSEG_BIT.  */
+
+       .globl VDSO_NOTE_MASK
+ELFNOTE_START(GNU, 2, "a")
+       .long 1                 /* ncaps */
+VDSO_NOTE_MASK:
+       .long 0                 /* mask */
+       .byte VDSO_NOTE_NONEGSEG_BIT; .asciz "nosegneg" /* bit, name */
+ELFNOTE_END
+#endif
diff --git a/arch/x86/vdso/vdso32/sigreturn.S b/arch/x86/vdso/vdso32/sigreturn.S
new file mode 100644
index 0000000..778f464
--- /dev/null
+++ b/arch/x86/vdso/vdso32/sigreturn.S
@@ -0,0 +1,143 @@
+/*
+ * Common code for the sigreturn entry points on the vsyscall page.
+ * So far this code is the same for both int80 and sysenter versions.
+ * This file is #include'd by vsyscall-*.S to define them after the
+ * vsyscall entry point.  The kernel assumes that the addresses of these
+ * routines are constant for all vsyscall implementations.
+ */
+
+#include <asm/unistd.h>
+#include <asm/asm-offsets.h>
+
+
+/* XXX
+   Should these be named "_sigtramp" or something?
+*/
+
+       .text
+       .org __kernel_vsyscall+32,0x90
+       .globl __kernel_sigreturn
+       .type __kernel_sigreturn,@function
+__kernel_sigreturn:
+.LSTART_sigreturn:
+       popl %eax               /* XXX does this mean it needs unwind info? */
+       movl $__NR_sigreturn, %eax
+       int $0x80
+.LEND_sigreturn:
+       .size __kernel_sigreturn,.-.LSTART_sigreturn
+
+       .balign 32
+       .globl __kernel_rt_sigreturn
+       .type __kernel_rt_sigreturn,@function
+__kernel_rt_sigreturn:
+.LSTART_rt_sigreturn:
+       movl $__NR_rt_sigreturn, %eax
+       int $0x80
+.LEND_rt_sigreturn:
+       .size __kernel_rt_sigreturn,.-.LSTART_rt_sigreturn
+       .balign 32
+       .previous
+
+       .section .eh_frame,"a",@progbits
+.LSTARTFRAMEDLSI1:
+       .long .LENDCIEDLSI1-.LSTARTCIEDLSI1
+.LSTARTCIEDLSI1:
+       .long 0                 /* CIE ID */
+       .byte 1                 /* Version number */
+       .string "zRS"           /* 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 0                 /* DW_CFA_nop */
+       .align 4
+.LENDCIEDLSI1:
+       .long .LENDFDEDLSI1-.LSTARTFDEDLSI1 /* Length FDE */
+.LSTARTFDEDLSI1:
+       .long .LSTARTFDEDLSI1-.LSTARTFRAMEDLSI1 /* CIE pointer */
+       /* HACK: The dwarf2 unwind routines will subtract 1 from the
+          return address to get an address in the middle of the
+          presumed call instruction.  Since we didn't get here via
+          a call, we need to include the nop before the real start
+          to make up for it.  */
+       .long .LSTART_sigreturn-1-.     /* PC-relative start address */
+       .long .LEND_sigreturn-.LSTART_sigreturn+1
+       .uleb128 0                      /* Augmentation */
+       /* What follows are the instructions for the table generation.
+          We record the locations of each register saved.  This is
+          complicated by the fact that the "CFA" is always assumed to
+          be the value of the stack pointer in the caller.  This means
+          that we must define the CFA of this body of code to be the
+          saved value of the stack pointer in the sigcontext.  Which
+          also means that there is no fixed relation to the other
+          saved registers, which means that we must use DW_CFA_expression
+          to compute their addresses.  It also means that when we
+          adjust the stack with the popl, we have to do it all over again.  */
+
+#define do_cfa_expr(offset)                                            \
+       .byte 0x0f;                     /* DW_CFA_def_cfa_expression */ \
+       .uleb128 1f-0f;                 /*   length */                  \
+0:     .byte 0x74;                     /*     DW_OP_breg4 */           \
+       .sleb128 offset;                /*      offset */               \
+       .byte 0x06;                     /*     DW_OP_deref */           \
+1:
+
+#define do_expr(regno, offset)                                         \
+       .byte 0x10;                     /* DW_CFA_expression */         \
+       .uleb128 regno;                 /*   regno */                   \
+       .uleb128 1f-0f;                 /*   length */                  \
+0:     .byte 0x74;                     /*     DW_OP_breg4 */           \
+       .sleb128 offset;                /*       offset */              \
+1:
+
+       do_cfa_expr(IA32_SIGCONTEXT_esp+4)
+       do_expr(0, IA32_SIGCONTEXT_eax+4)
+       do_expr(1, IA32_SIGCONTEXT_ecx+4)
+       do_expr(2, IA32_SIGCONTEXT_edx+4)
+       do_expr(3, IA32_SIGCONTEXT_ebx+4)
+       do_expr(5, IA32_SIGCONTEXT_ebp+4)
+       do_expr(6, IA32_SIGCONTEXT_esi+4)
+       do_expr(7, IA32_SIGCONTEXT_edi+4)
+       do_expr(8, IA32_SIGCONTEXT_eip+4)
+
+       .byte 0x42      /* DW_CFA_advance_loc 2 -- nop; popl eax. */
+
+       do_cfa_expr(IA32_SIGCONTEXT_esp)
+       do_expr(0, IA32_SIGCONTEXT_eax)
+       do_expr(1, IA32_SIGCONTEXT_ecx)
+       do_expr(2, IA32_SIGCONTEXT_edx)
+       do_expr(3, IA32_SIGCONTEXT_ebx)
+       do_expr(5, IA32_SIGCONTEXT_ebp)
+       do_expr(6, IA32_SIGCONTEXT_esi)
+       do_expr(7, IA32_SIGCONTEXT_edi)
+       do_expr(8, IA32_SIGCONTEXT_eip)
+
+       .align 4
+.LENDFDEDLSI1:
+
+       .long .LENDFDEDLSI2-.LSTARTFDEDLSI2 /* Length FDE */
+.LSTARTFDEDLSI2:
+       .long .LSTARTFDEDLSI2-.LSTARTFRAMEDLSI1 /* CIE pointer */
+       /* HACK: See above wrt unwind library assumptions.  */
+       .long .LSTART_rt_sigreturn-1-.  /* PC-relative start address */
+       .long .LEND_rt_sigreturn-.LSTART_rt_sigreturn+1
+       .uleb128 0                      /* Augmentation */
+       /* What follows are the instructions for the table generation.
+          We record the locations of each register saved.  This is
+          slightly less complicated than the above, since we don't
+          modify the stack pointer in the process.  */
+
+       do_cfa_expr(IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_esp)
+       do_expr(0, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_eax)
+       do_expr(1, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_ecx)
+       do_expr(2, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_edx)
+       do_expr(3, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_ebx)
+       do_expr(5, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_ebp)
+       do_expr(6, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_esi)
+       do_expr(7, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_edi)
+       do_expr(8, IA32_RT_SIGFRAME_sigcontext-4 + IA32_SIGCONTEXT_eip)
+
+       .align 4
+.LENDFDEDLSI2:
+       .previous
diff --git a/arch/x86/vdso/vdso32/sysenter.S b/arch/x86/vdso/vdso32/sysenter.S
new file mode 100644
index 0000000..4b98fc4
--- /dev/null
+++ b/arch/x86/vdso/vdso32/sysenter.S
@@ -0,0 +1,122 @@
+/*
+ * Code for the vsyscall page.  This version uses the sysenter instruction.
+ *
+ * NOTE:
+ * 1) __kernel_vsyscall _must_ be first in this page.
+ * 2) there are alignment constraints on this stub, see vsyscall-sigreturn.S
+ *    for details.
+ */
+
+/*
+ * The caller puts arg2 in %ecx, which gets pushed. The kernel will use
+ * %ecx itself for arg2. The pushing is because the sysexit instruction
+ * (found in entry.S) requires that we clobber %ecx with the desired %esp.
+ * User code might expect that %ecx is unclobbered though, as it would be
+ * for returning via the iret instruction, so we must push and pop.
+ *
+ * The caller puts arg3 in %edx, which the sysexit instruction requires
+ * for %eip. Thus, exactly as for arg2, we must push and pop.
+ *
+ * Arg6 is different. The caller puts arg6 in %ebp. Since the sysenter
+ * instruction clobbers %esp, the user's %esp won't even survive entry
+ * into the kernel. We store %esp in %ebp. Code in entry.S must fetch
+ * arg6 from the stack.
+ *
+ * You can not use this vsyscall for the clone() syscall because the
+ * three dwords on the parent stack do not get copied to the child.
+ */
+       .text
+       .globl __kernel_vsyscall
+       .type __kernel_vsyscall,@function
+__kernel_vsyscall:
+.LSTART_vsyscall:
+       push %ecx
+.Lpush_ecx:
+       push %edx
+.Lpush_edx:
+       push %ebp
+.Lenter_kernel:
+       movl %esp,%ebp
+       sysenter
+
+       /* 7: align return point with nop's to make disassembly easier */
+       .space 7,0x90
+
+       /* 14: System call restart point is here! (SYSENTER_RETURN-2) */
+       jmp .Lenter_kernel
+       /* 16: System call normal return point is here! */
+       .globl SYSENTER_RETURN  /* Symbol used by sysenter.c  */
+SYSENTER_RETURN:
+       pop %ebp
+.Lpop_ebp:
+       pop %edx
+.Lpop_edx:
+       pop %ecx
+.Lpop_ecx:
+       ret
+.LEND_vsyscall:
+       .size __kernel_vsyscall,.-.LSTART_vsyscall
+       .previous
+
+       .section .eh_frame,"a",@progbits
+.LSTARTFRAMEDLSI:
+       .long .LENDCIEDLSI-.LSTARTCIEDLSI
+.LSTARTCIEDLSI:
+       .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
+.LENDCIEDLSI:
+       .long .LENDFDEDLSI-.LSTARTFDEDLSI /* Length FDE */
+.LSTARTFDEDLSI:
+       .long .LSTARTFDEDLSI-.LSTARTFRAMEDLSI /* CIE pointer */
+       .long .LSTART_vsyscall-.        /* PC-relative start address */
+       .long .LEND_vsyscall-.LSTART_vsyscall
+       .uleb128 0
+       /* What follows are the instructions for the table generation.
+          We have to record all changes of the stack pointer.  */
+       .byte 0x04              /* DW_CFA_advance_loc4 */
+       .long .Lpush_ecx-.LSTART_vsyscall
+       .byte 0x0e              /* DW_CFA_def_cfa_offset */
+       .byte 0x08              /* RA at offset 8 now */
+       .byte 0x04              /* DW_CFA_advance_loc4 */
+       .long .Lpush_edx-.Lpush_ecx
+       .byte 0x0e              /* DW_CFA_def_cfa_offset */
+       .byte 0x0c              /* RA at offset 12 now */
+       .byte 0x04              /* DW_CFA_advance_loc4 */
+       .long .Lenter_kernel-.Lpush_edx
+       .byte 0x0e              /* DW_CFA_def_cfa_offset */
+       .byte 0x10              /* RA at offset 16 now */
+       .byte 0x85, 0x04        /* DW_CFA_offset %ebp -16 */
+       /* Finally the epilogue.  */
+       .byte 0x04              /* DW_CFA_advance_loc4 */
+       .long .Lpop_ebp-.Lenter_kernel
+       .byte 0x0e              /* DW_CFA_def_cfa_offset */
+       .byte 0x0c              /* RA at offset 12 now */
+       .byte 0xc5              /* DW_CFA_restore %ebp */
+       .byte 0x04              /* DW_CFA_advance_loc4 */
+       .long .Lpop_edx-.Lpop_ebp
+       .byte 0x0e              /* DW_CFA_def_cfa_offset */
+       .byte 0x08              /* RA at offset 8 now */
+       .byte 0x04              /* DW_CFA_advance_loc4 */
+       .long .Lpop_ecx-.Lpop_edx
+       .byte 0x0e              /* DW_CFA_def_cfa_offset */
+       .byte 0x04              /* RA at offset 4 now */
+       .align 4
+.LENDFDEDLSI:
+       .previous
+
+/*
+ * Get the common code for the sigreturn entry points.
+ */
+#include "sigreturn.S"
-
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