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| author |   Michael Ellerman <mpe@ellerman.id.au> | 2019-07-22 22:26:56 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-07-29 09:34:27 +1000 |
| commit | cee3536d24a1d5db66b9f68c3ece0af128187ab4 (patch) | |
| tree | caeb86d802caa89975cbd86fb1f83ff5ff7fb191 /arch/powerpc/kernel/entry_32.S | |
| parent | Linux 5.3-rc2 (diff) | |
| download | linux-dev-cee3536d24a1d5db66b9f68c3ece0af128187ab4.tar.xz linux-dev-cee3536d24a1d5db66b9f68c3ece0af128187ab4.zip | |
powerpc: Wire up clone3 syscall
Wire up the new clone3 syscall added in commit 7f192e3cd316 ("fork:
add clone3").
This requires a ppc_clone3 wrapper, in order to save the non-volatile
GPRs before calling into the generic syscall code. Otherwise we hit
the BUG_ON in CHECK_FULL_REGS in copy_thread().
Lightly tested using Christian's test code on a Power8 LE VM.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Christian Brauner <christian@brauner.io>
Link: https://lore.kernel.org/r/20190724140259.23554-1-mpe@ellerman.id.au
Diffstat (limited to 'arch/powerpc/kernel/entry_32.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_32.S | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 85fdb6d879f1..54fab22c9a43 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -597,6 +597,14 @@ ppc_clone: stw r0,_TRAP(r1) /* register set saved */ b sys_clone + .globl ppc_clone3 +ppc_clone3: + SAVE_NVGPRS(r1) + lwz r0,_TRAP(r1) + rlwinm r0,r0,0,0,30 /* clear LSB to indicate full */ + stw r0,_TRAP(r1) /* register set saved */ + b sys_clone3 + .globl ppc_swapcontext ppc_swapcontext: SAVE_NVGPRS(r1) |