Magellan Linux

  • Back to homepage
    • /[pkg-src]/trunk/kernel26-xen/patches-2.6.25-r1/1142-2.6.25-xen-Create-xen-specific-syscall-entry.patch

    Contents of /trunk/kernel26-xen/patches-2.6.25-r1/1142-2.6.25-xen-Create-xen-specific-syscall-entry.patch

    Parent Directory Parent Directory | Revision Log Revision Log

    Revision 606 - (show annotations) (download)
    Thu May 22 23:13:13 2008 UTC (16 years ago) by niro
    File size: 1991 byte(s) 
    -ver bump to 2.6.25-magellan-r1:
- linux-2.6.25.4
- fbcondecor-0.9.4
- squashfs-3.3
- unionfs-2.3.3
- tuxonice-3.0-rc7
- linux-phc-0.3.0
- acpi-dstd-0.9a
- reiser4
- xen-3.2.0
. ipw3945-1.2.2
    1 From f651fb2302e82ffb677241a5e5e1b919f4028fb3 Mon Sep 17 00:00:00 2001
    2 From: Eduardo Habkost <ehabkost@redhat.com>
    3 Date: Mon, 4 Feb 2008 17:36:08 -0200
    4 Subject: [PATCH] Create xen-specific syscall entry
    5
    6 The stack and register saving for syscall entry is very different under
    7 xen. xen_system_call_entry just handle the register saving and jumps
    8 to system_call_after_saveargs, inside system_call.
    9
    10 Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
    11 ---
    12 arch/x86/xen/entry_64.S | 15 +++++++++++++++
    13 arch/x86/xen/setup.c | 2 +-
    14 arch/x86/xen/xen-ops.h | 1 +
    15 3 files changed, 17 insertions(+), 1 deletions(-)
    16
    17 diff --git a/arch/x86/xen/entry_64.S b/arch/x86/xen/entry_64.S
    18 index 2a2a0a0..5c8910b 100644
    19 --- a/arch/x86/xen/entry_64.S
    20 +++ b/arch/x86/xen/entry_64.S
    21 @@ -51,3 +51,18 @@ ENTRY(xen_retint_swapgs) /* return to user-space */
    22 TRACE_IRQS_IRETQ
    23 jmp restore_args
    24 END(xen_retint_swapgs)
    25 +
    26 +
    27 +ENTRY(xen_system_call_entry)
    28 + CFI_STARTPROC simple
    29 +
    30 + //FIXME: CFI directives here
    31 +
    32 + // We need additional space for orig_ax.
    33 + // That would be SAVE_ARGS 8, but we already have
    34 + // r11 and rcx saved on the stack
    35 + SAVE_ARGS -8
    36 +
    37 + jmp system_call_after_saveargs
    38 + CFI_ENDPROC
    39 +END(xen_system_call_entry)
    40 diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
    41 index a64385d..7b0468f 100644
    42 --- a/arch/x86/xen/setup.c
    43 +++ b/arch/x86/xen/setup.c
    44 @@ -100,7 +100,7 @@ void __init xen_arch_setup(void)
    45 #else
    46 HYPERVISOR_set_callbacks((unsigned long)xen_hypervisor_callback,
    47 (unsigned long)xen_failsafe_callback,
    48 - (unsigned long)system_call_after_swapgs);
    49 + (unsigned long)xen_system_call_entry);
    50 #endif
    51
    52 set_iopl.iopl = 1;
    53 diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
    54 index b523062..4bd901c 100644
    55 --- a/arch/x86/xen/xen-ops.h
    56 +++ b/arch/x86/xen/xen-ops.h
    57 @@ -74,4 +74,5 @@ void xen_iret_direct(void);
    58 void xen_iret(void);
    59 void xen_irqenable_syscall_ret(void);
    60
    61 +void xen_system_call_entry(void);
    62 #endif /* XEN_OPS_H */
    63 --
    64 1.5.4.1
    65