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| author | Keir Fraser <keir@xen.org> | 2010-12-24 08:47:23 +0000 |
|---|---|---|
| committer | Keir Fraser <keir@xen.org> | 2010-12-24 08:47:23 +0000 |
| commit | 0c4ff0fb92533aff947945f3562221a83bbfb941 (patch) | |
| tree | 6c87342b77718bc05e02e23841051c8aa01d6abe /xen/arch/x86/x86_64/entry.S | |
| parent | abf60d361232f53ad3c51fab74ff3b6f084d7f8e (diff) | |
| download | xen-0c4ff0fb92533aff947945f3562221a83bbfb941.tar.gz xen-0c4ff0fb92533aff947945f3562221a83bbfb941.tar.bz2 xen-0c4ff0fb92533aff947945f3562221a83bbfb941.zip | |
x86-64: use PC-relative exception table entries
... thus allowing to make the entries half their current size. Rather
than adjusting all instances to the new layout, abstract the
construction the table entries via a macro (paralleling a similar one
in recent Linux).
Also change the name of the section (to allow easier detection of
missed cases) and merge the final resulting output sections into
.data.read_mostly.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Diffstat (limited to 'xen/arch/x86/x86_64/entry.S')
| -rw-r--r-- | xen/arch/x86/x86_64/entry.S | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/xen/arch/x86/x86_64/entry.S b/xen/arch/x86/x86_64/entry.S index 7c5fe92786..b30f2d0c13 100644 --- a/xen/arch/x86/x86_64/entry.S +++ b/xen/arch/x86/x86_64/entry.S @@ -84,12 +84,8 @@ failsafe_callback: 1: call create_bounce_frame jmp test_all_events .previous -.section __pre_ex_table,"a" - .quad .Lft0,.Lfx0 -.previous -.section __ex_table,"a" - .quad .Ldf0,failsafe_callback -.previous + _ASM_PRE_EXTABLE(.Lft0, .Lfx0) + _ASM_EXTABLE(.Ldf0, failsafe_callback) ALIGN /* No special register assumptions. */ @@ -412,14 +408,18 @@ UNLIKELY_END(bounce_failsafe) jz domain_crash_synchronous movq %rax,UREGS_rip+8(%rsp) ret -.section __ex_table,"a" - .quad .Lft2,domain_crash_synchronous , .Lft3,domain_crash_synchronous - .quad .Lft4,domain_crash_synchronous , .Lft5,domain_crash_synchronous - .quad .Lft6,domain_crash_synchronous , .Lft7,domain_crash_synchronous - .quad .Lft8,domain_crash_synchronous , .Lft9,domain_crash_synchronous - .quad .Lft10,domain_crash_synchronous , .Lft11,domain_crash_synchronous - .quad .Lft12,domain_crash_synchronous , .Lft13,domain_crash_synchronous -.previous + _ASM_EXTABLE(.Lft2, domain_crash_synchronous) + _ASM_EXTABLE(.Lft3, domain_crash_synchronous) + _ASM_EXTABLE(.Lft4, domain_crash_synchronous) + _ASM_EXTABLE(.Lft5, domain_crash_synchronous) + _ASM_EXTABLE(.Lft6, domain_crash_synchronous) + _ASM_EXTABLE(.Lft7, domain_crash_synchronous) + _ASM_EXTABLE(.Lft8, domain_crash_synchronous) + _ASM_EXTABLE(.Lft9, domain_crash_synchronous) + _ASM_EXTABLE(.Lft10, domain_crash_synchronous) + _ASM_EXTABLE(.Lft11, domain_crash_synchronous) + _ASM_EXTABLE(.Lft12, domain_crash_synchronous) + _ASM_EXTABLE(.Lft13, domain_crash_synchronous) domain_crash_synchronous_string: .asciz "domain_crash_sync called from entry.S\n" |