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Save and restore floating point registers in get/set_mcontext().
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Authored by jhb on Jan 16 2020, 10:51 PM.
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Details

Summary

arm64 and riscv were only saving and restoring floating point
registers for sendsig() and sys_sigreturn(), but not for getcontext(),
setcontext(), and swapcontext().

While here, remove a pointless check for uap being NULL from
sys_sigreturn().

Test Plan
  • booted riscv64 under spike which should exercise sendsig/sigreturn
  • have not tested arm64

Diff Detail

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Build Status
Buildable 28711
Build 26726: arc lint + arc unit

Event Timeline

This revision is now accepted and ready to land.Jan 17 2020, 4:45 PM

Just curious, why does spike in particular exercise sendsig/sigreturn?

Just curious, why does spike in particular exercise sendsig/sigreturn?

I'm just assuming that booting multiuser involves catching at least one signal somewhere along the way.