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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-07-12 02:22:00 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-16 11:08:27 +0200 |
| commit | 6a52e4b1cddd90fbfde8fb67021657936ee74b07 (patch) | |
| tree | c876e1fafe89169f373f6b04739242b5d646fcf7 /arch/x86/vdso/vdso32.S | |
| parent | 71415c6a0877d5944d5dc3060f3b03513746158d (diff) | |
| download | linux-6a52e4b1cddd90fbfde8fb67021657936ee74b07.tar.gz linux-6a52e4b1cddd90fbfde8fb67021657936ee74b07.tar.bz2 linux-6a52e4b1cddd90fbfde8fb67021657936ee74b07.zip | |
x86_64: further cleanup of 32-bit compat syscall mechanisms
AMD only supports "syscall" from 32-bit compat usermode.
Intel and Centaur(?) only support "sysenter" from 32-bit compat usermode.
Set the X86 feature bits accordingly, and set up the vdso in
accordance with those bits. On the offchance we run on in a 64-bit
environment which supports neither syscall nor sysenter from 32-bit
mode, then fall back to the int $0x80 vdso.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/vdso/vdso32.S')
| -rw-r--r-- | arch/x86/vdso/vdso32.S | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/x86/vdso/vdso32.S b/arch/x86/vdso/vdso32.S index 1e36f72cab86..2ce5f82c333b 100644 --- a/arch/x86/vdso/vdso32.S +++ b/arch/x86/vdso/vdso32.S @@ -2,14 +2,17 @@ __INITDATA - .globl vdso32_default_start, vdso32_default_end -vdso32_default_start: -#ifdef CONFIG_X86_32 + .globl vdso32_int80_start, vdso32_int80_end +vdso32_int80_start: .incbin "arch/x86/vdso/vdso32-int80.so" -#else +vdso32_int80_end: + + .globl vdso32_syscall_start, vdso32_syscall_end +vdso32_syscall_start: +#ifdef CONFIG_COMPAT .incbin "arch/x86/vdso/vdso32-syscall.so" #endif -vdso32_default_end: +vdso32_syscall_end: .globl vdso32_sysenter_start, vdso32_sysenter_end vdso32_sysenter_start: |