diff options
| author |  Andreas Larsson <andreas@gaisler.com>
| 2021-02-04 17:23:41 +0100 |
|---|---|---|
| committer |  David S. Miller <davem@davemloft.net>
| 2021-02-18 16:15:11 -0800 |
| commit | c599a7821be7952033727a30e93bd2d053073c78 (patch) | |
| tree | df9b674c803fc84f332c502a184f27a3e99023db /arch/sparc/kernel/rtrap_32.S | |
| parent | sparc32: Limit memblock allocation to low memory (diff) | |
| download | linux-c599a7821be7952033727a30e93bd2d053073c78.tar.gz linux-c599a7821be7952033727a30e93bd2d053073c78.tar.bz2 linux-c599a7821be7952033727a30e93bd2d053073c78.zip | |
sparc32: Preserve clone syscall flags argument for restarts due to signals
This fixes a bug where a clone syscall that is restarted due to a
pending signal is restarted with garbage in the register %o0 that holds
the clone flags.
This keep the original %i0 of a syscall (as seen from the trap handler)
in %l6 rather than %l5. This is done because for clone (and also qfork)
%l5 is used as a temporary variable in the same register window. Before
this, that temporary value would be the value that was then incorrectly
used as the orig_i0 argument to do_notify_resume.
In order to preserve %l6, the temporary usage of %l6 in ret_sys_call is
changed to use %l5 instead and the setting %l6 to 0 or 1 was removed.
The use of that 0 or 1 value in %l6 was removed in commit
28e6103665301ce60634e8a77f0b657c6cc099de.
Signed-off-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/rtrap_32.S')
| -rw-r--r-- | arch/sparc/kernel/rtrap_32.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sparc/kernel/rtrap_32.S b/arch/sparc/kernel/rtrap_32.S index dca8ed810046..8931fe266346 100644 --- a/arch/sparc/kernel/rtrap_32.S +++ b/arch/sparc/kernel/rtrap_32.S @@ -75,7 +75,7 @@ signal_p: ld [%sp + STACKFRAME_SZ + PT_PSR], %t_psr mov %g2, %o2 - mov %l5, %o1 + mov %l6, %o1 call do_notify_resume add %sp, STACKFRAME_SZ, %o0 ! pt_regs ptr |