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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vdso32	x86-32, vdso: On system call restart after SYSENTER, use int $0x80	2011-08-23 16:20:10 -07:00
.gitignore	x86: add vdso32-int80-syms.lds to .gitignore	2008-01-30 13:33:24 +01:00
checkundef.sh	x86, vdso: Don't quote $nm in the script for checking vdso references	2010-07-27 23:52:29 -07:00
Makefile	x86-64: Add --no-undefined to vDSO build	2011-07-13 11:23:09 -07:00
vclock_gettime.c	x86, vdso: Drop now wrong comment	2011-07-18 12:29:50 -07:00
vdso32-setup.c	mm: arch: rename in_gate_area_no_task to in_gate_area_no_mm	2011-03-23 16:36:55 -04:00
vdso32.S	x86_64: further cleanup of 32-bit compat syscall mechanisms	2008-07-16 11:08:27 +02:00
vdso-layout.lds.S	x86 vDSO: new layout	2008-01-30 13:30:41 +01:00
vdso-note.S	x86_64: move vdso	2007-10-11 11:17:10 +02:00
vdso.lds.S	x86-64: Add time to vDSO	2011-05-24 14:51:29 +02:00
vdso.S	x86-64, vdso: Do not allocate memory for the vDSO	2011-07-21 13:41:53 -07:00
vgetcpu.c	x86-64: Clean up vdso/kernel shared variables	2011-05-24 14:51:28 +02:00
vma.c	x86-64, vdso: Do not allocate memory for the vDSO	2011-07-21 13:41:53 -07:00