H. Peter Anvin 7ca0758cdb x86-32, vdso: On system call restart after SYSENTER, use int $0x80 ... When we enter a 32-bit system call via SYSENTER or SYSCALL, we shuffle the arguments to match the int $0x80 calling convention. This was probably a design mistake, but it's what it is now. This causes errors if the system call as to be restarted. For SYSENTER, we have to invoke the instruction from the vdso as the return address is hardcoded. Accordingly, we can simply replace the jump in the vdso with an int $0x80 instruction and use the slower entry point for a post-restart. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/CA%2B55aFztZ=r5wa0x26KJQxvZOaQq8s2v3u50wCyJcA-Sc4g8gQ@mail.gmail.com Cc: <stable@kernel.org>		2011-08-23 16:20:10 -07:00
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.gitignore
int80.S
note.S
sigreturn.S
syscall.S
sysenter.S	x86-32, vdso: On system call restart after SYSENTER, use int $0x80	2011-08-23 16:20:10 -07:00
vdso32.lds.S