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| author | emaste <emaste@FreeBSD.org> | 2013-11-14 15:37:20 +0000 |
|---|---|---|
| committer | emaste <emaste@FreeBSD.org> | 2013-11-14 15:37:20 +0000 |
| commit | 9dcbb8e88d3f051a7ee6593c53e5ad49e4904bfd (patch) | |
| tree | e176fc3a1f9254f29a0794cb5f498dea6487cc1e /sys/i386/include/vm86.h | |
| parent | 544cc7da1e2d2b5eaee7344d5fdaebfba13d6ec5 (diff) | |
| download | FreeBSD-src-9dcbb8e88d3f051a7ee6593c53e5ad49e4904bfd.zip FreeBSD-src-9dcbb8e88d3f051a7ee6593c53e5ad49e4904bfd.tar.gz | |
x86: Allow users to change PSL_RF via ptrace(PT_SETREGS...)
Debuggers may need to change PSL_RF. Note that tf_eflags is already stored
in the signal context during signal handling and PSL_RF previously could be
modified via sigreturn, so this change should not provide any new ability
to userspace.
For background see the thread at:
http://lists.freebsd.org/pipermail/freebsd-i386/2007-September/005910.html
Reviewed by: jhb, kib
Sponsored by: DARPA, AFRL
Diffstat (limited to 'sys/i386/include/vm86.h')
| -rw-r--r-- | sys/i386/include/vm86.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/i386/include/vm86.h b/sys/i386/include/vm86.h index e33d720..2253d5c 100644 --- a/sys/i386/include/vm86.h +++ b/sys/i386/include/vm86.h @@ -113,7 +113,7 @@ struct vm86context { } pmap[VM86_PMAPSIZE]; }; -#define VM_USERCHANGE (PSL_USERCHANGE | PSL_RF) +#define VM_USERCHANGE (PSL_USERCHANGE) #define VME_USERCHANGE (VM_USERCHANGE | PSL_VIP | PSL_VIF) struct vm86_kernel { |
