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| author |   Al Viro <viro@zeniv.linux.org.uk> | 2012-12-14 13:49:35 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-12-19 18:07:40 -0500 |
| commit | 9b064fc3f95a8e44e929fdf4d6037334ea03d15b (patch) | |
| tree | dd1a2a6075667841f88b1ea8b62f4df2e18c3c68 /include/linux/compat.h | |
| parent | new helper: restore_altstack() (diff) | |
| download | linux-dev-9b064fc3f95a8e44e929fdf4d6037334ea03d15b.tar.xz linux-dev-9b064fc3f95a8e44e929fdf4d6037334ea03d15b.zip | |
new helper: compat_user_stack_pointer()
Compat counterpart of current_user_stack_pointer(); for most of the biarch
architectures those two are identical, but e.g. arm64 and arm use different
registers for stack pointer...
Note that amd64 variants of current_user_stack_pointer/compat_user_stack_pointer
do *not* rely on pt_regs having been through FIXUP_TOP_OF_STACK.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/compat.h')
| -rw-r--r-- | include/linux/compat.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/compat.h b/include/linux/compat.h index a7877fa809fd..62bb76f91baf 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -65,6 +65,9 @@ #endif /* CONFIG_HAVE_SYSCALL_WRAPPERS */ +#ifndef compat_user_stack_pointer +#define compat_user_stack_pointer() current_user_stack_pointer() +#endif #define compat_jiffies_to_clock_t(x) \ (((unsigned long)(x) * COMPAT_USER_HZ) / HZ) |