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| author | Jan Beulich <JBeulich@novell.com> | 2010-10-19 14:52:26 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-10-19 14:28:02 -0700 |
| commit | 3234282f33b29d349bcada40204fc7c8fda7fe72 (patch) | |
| tree | d1855c5d9d8e6db25b72b17461da1459cd51fa71 /arch/x86/kernel/entry_32.S | |
| parent | d0ed0c32662e756e7daf85e70a5a27a9c1111331 (diff) | |
| download | blackbird-op-linux-3234282f33b29d349bcada40204fc7c8fda7fe72.tar.gz blackbird-op-linux-3234282f33b29d349bcada40204fc7c8fda7fe72.zip | |
x86, asm: Fix CFI macro invocations to deal with shortcomings in gas
gas prior to (perhaps) 2.16.90 has problems with passing non-
parenthesized expressions containing spaces to macros. Spaces, however,
get inserted by cpp between any macro expanding to a number and a
subsequent + or -. For the +, current x86 gas then removes the space
again (future gas may not do so), but for the - the space gets retained
and is then considered a separator between macro arguments.
Fix the respective definitions for both the - and + cases, so that they
neither contain spaces nor make cpp insert any (the latter by adding
seemingly redundant parentheses).
Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <4CBDBEBA020000780001E05A@vpn.id2.novell.com>
Cc: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/entry_32.S')
| -rw-r--r-- | arch/x86/kernel/entry_32.S | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S index 9fb188d7bc76..f73a4b881aa9 100644 --- a/arch/x86/kernel/entry_32.S +++ b/arch/x86/kernel/entry_32.S @@ -382,20 +382,20 @@ sysenter_past_esp: * enough kernel state to call TRACE_IRQS_OFF can be called - but * we immediately enable interrupts at that point anyway. */ - pushl_cfi $(__USER_DS) + pushl_cfi $__USER_DS /*CFI_REL_OFFSET ss, 0*/ pushl_cfi %ebp CFI_REL_OFFSET esp, 0 pushfl_cfi orl $X86_EFLAGS_IF, (%esp) - pushl_cfi $(__USER_CS) + pushl_cfi $__USER_CS /*CFI_REL_OFFSET cs, 0*/ /* * Push current_thread_info()->sysenter_return to the stack. * A tiny bit of offset fixup is necessary - 4*4 means the 4 words * pushed above; +8 corresponds to copy_thread's esp0 setting. */ - pushl_cfi (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp) + pushl_cfi TI_sysenter_return-THREAD_SIZE_asm+8+4*4(%esp) CFI_REL_OFFSET eip, 0 pushl_cfi %eax |
