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| author | Michael Ellerman <mpe@ellerman.id.au> | 2022-06-28 00:02:36 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-07-25 12:05:16 +1000 |
| commit | 611e385087efc2cc3a7033aedd3f84ad0cf2a703 (patch) | |
| tree | 6a5546d4bfc523e329e31526573d599c030e76c7 /block | |
| parent | 149a497d5fda3e996a00437260a4c170e43909c8 (diff) | |
| download | linux-stable-611e385087efc2cc3a7033aedd3f84ad0cf2a703.tar.gz linux-stable-611e385087efc2cc3a7033aedd3f84ad0cf2a703.tar.bz2 linux-stable-611e385087efc2cc3a7033aedd3f84ad0cf2a703.zip | |
selftests/powerpc/ptrace: Do more of ptrace-gpr in asm
The ptrace-gpr test includes some inline asm to load GPR and FPR
registers. It then goes back to C to wait for the parent to trace it and
then checks register contents.
The split between inline asm and C is fragile, it relies on the compiler
not using any non-volatile GPRs after the inline asm block. It also
requires a very large and unwieldy inline asm block.
So convert the logic to set registers, wait, and store registers to a
single asm function, meaning there's no window for the compiler to
intervene.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220627140239.2464900-10-mpe@ellerman.id.au
Diffstat (limited to 'block')
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