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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>
22 lines
473 B
ArmAsm
22 lines
473 B
ArmAsm
#include <linux/init.h>
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__INITDATA
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.globl vdso32_int80_start, vdso32_int80_end
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vdso32_int80_start:
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.incbin "arch/x86/vdso/vdso32-int80.so"
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vdso32_int80_end:
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.globl vdso32_syscall_start, vdso32_syscall_end
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vdso32_syscall_start:
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#ifdef CONFIG_COMPAT
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.incbin "arch/x86/vdso/vdso32-syscall.so"
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#endif
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vdso32_syscall_end:
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.globl vdso32_sysenter_start, vdso32_sysenter_end
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vdso32_sysenter_start:
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.incbin "arch/x86/vdso/vdso32-sysenter.so"
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vdso32_sysenter_end:
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__FINIT
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