diff options
| author | Jordan Niethe <jniethe5@gmail.com> | 2020-05-06 13:40:34 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-19 00:10:37 +1000 |
| commit | 95b980a00d1220ca67550a933166704db8bc5c14 (patch) | |
| tree | 2e049da522701c72aa1432aae51331f77969100c /arch/powerpc/lib | |
| parent | 7ba68b2172c19031fdc2a2caf37328edd146e299 (diff) | |
powerpc: Add a probe_kernel_read_inst() function
Introduce a probe_kernel_read_inst() function to use in cases where
probe_kernel_read() is used for getting an instruction. This will be
more useful for prefixed instructions.
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Reviewed-by: Alistair Popple <alistair@popple.id.au>
[mpe: Don't write to *inst on error]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200506034050.24806-15-jniethe5@gmail.com
Diffstat (limited to 'arch/powerpc/lib')
| -rw-r--r-- | arch/powerpc/lib/inst.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/lib/inst.c b/arch/powerpc/lib/inst.c index 605220dbb6ba..bf3126ee399d 100644 --- a/arch/powerpc/lib/inst.c +++ b/arch/powerpc/lib/inst.c @@ -18,3 +18,16 @@ int probe_user_read_inst(struct ppc_inst *inst, return err; } + +int probe_kernel_read_inst(struct ppc_inst *inst, + struct ppc_inst *src) +{ + unsigned int val; + int err; + + err = probe_kernel_read(&val, src, sizeof(val)); + if (!err) + *inst = ppc_inst(val); + + return err; +} |