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| author | Rich Felker <dalias@aerifal.cx> | 2019-07-16 20:49:02 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2019-07-16 20:49:02 -0400 |
| commit | ddc7c4f936c7a90781072f10dbaa122007e939d0 (patch) | |
| tree | 289319113bf6ce143f97eb0fbbc08f46305b8618 /arch/powerpc64/pthread_arch.h | |
| parent | db2a148d9df3d7d1f3423313761f0e2517c1aa2b (diff) | |
| download | musl-ddc7c4f936c7a90781072f10dbaa122007e939d0.tar.gz musl-ddc7c4f936c7a90781072f10dbaa122007e939d0.tar.bz2 musl-ddc7c4f936c7a90781072f10dbaa122007e939d0.tar.xz musl-ddc7c4f936c7a90781072f10dbaa122007e939d0.zip | |
clean up mips64/n32 syscall asm constraints
ever since inline syscalls were added for (o32) mips in commit
328810d32524e4928fec50b57e37e1bf330b2e40, the asm has nonsensically
loaded the syscall number, rather than taking $2 as an input
constraint to let the compiler load it. commit
cfc09b1ecf0c6981494fd73dffe234416f66af10 improved on this somewhat by
allowing a constant syscall number to propagate into an immediate, but
missed that the whole operation made no sense.
now, only $4, $5, $6, $8, and $9 are potential input-only registers.
$2 is always input and output, and $7 is both when it's an argument,
otherwise output-only. previously, $7 was treated as an input (with a
"1" constraint matching its output position) even when it was not an
input, which was arguably undefined behavior (asm input from
indeterminate value). this is corrected.
Diffstat (limited to 'arch/powerpc64/pthread_arch.h')
0 files changed, 0 insertions, 0 deletions