tree f65d2acf7fac8fa6abe6cc097624f82581cb4c9f
parent 7b5cc4b251b280eede6419a79f939f0a8de43f76
author Elliott Hughes <enh@google.com> 1680817490 -0700
committer Elliott Hughes <enh@google.com> 1680817490 -0700

setjmp.h: increase riscv64 jmp_buf size.

If we switch from x18 to gp for shadow call stack, we're going to need
another slot in jmp_buf. We'll need this even for hardware shadow call
stacks too.

While I'm here, and because this is likely my last chance, let's just
round this up to 32 for safety. musl and glibc only have the minimum
needed (which I think means they'll need an ABI break to support SCS
unless they just use a callee-saved general purpose register), but since
we can't do ABI breaks after we ship, let's play it safe.

Bug: https://github.com/google/android-riscv64/issues/72
Test: treehugger
Change-Id: I60661fb7a308c900bfd08c9361f51919b798c005