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| author | Rusty Russell <rusty@rustcorp.com.au> | 2007-10-22 11:03:35 +1000 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2007-10-23 15:49:53 +1000 |
| commit | c18acd73ffc209def08003a1927473096f66c5ad (patch) | |
| tree | dd8e292ac8ca90b061b7e37ad6947231ced566e3 /include/linux/lguest.h | |
| parent | ee3db0f2b6053b65f3b70253f5f810d9a3d67b28 (diff) | |
| download | lwn-c18acd73ffc209def08003a1927473096f66c5ad.tar.gz lwn-c18acd73ffc209def08003a1927473096f66c5ad.zip | |
Allow guest to specify syscall vector to use.
(Based on Ron Minnich's LGUEST_PLAN9_SYSCALL patch).
This patch allows Guests to specify what system call vector they want,
and we try to reserve it. We only allow one non-Linux system call
vector, to try to avoid DoS on the Host.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/lguest.h')
| -rw-r--r-- | include/linux/lguest.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/lguest.h b/include/linux/lguest.h index 9ddac2f0a97c..083052236db9 100644 --- a/include/linux/lguest.h +++ b/include/linux/lguest.h @@ -48,6 +48,9 @@ struct lguest_data /* Fields initialized by the Guest at boot: */ /* Instruction range to suppress interrupts even if enabled */ unsigned long noirq_start, noirq_end; + + /* The vector to try to use for system calls (0x40 or 0x80). */ + unsigned int syscall_vec; }; extern struct lguest_data lguest_data; #endif /* __ASSEMBLY__ */ |