diff options
Diffstat (limited to 'lib/libc/powerpc64/gen/_ctx_start.S')
| -rw-r--r-- | lib/libc/powerpc64/gen/_ctx_start.S | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/libc/powerpc64/gen/_ctx_start.S b/lib/libc/powerpc64/gen/_ctx_start.S index c2f8abfd6486..98225f9c1138 100644 --- a/lib/libc/powerpc64/gen/_ctx_start.S +++ b/lib/libc/powerpc64/gen/_ctx_start.S @@ -34,6 +34,16 @@ ld %r2,8(%r14) ld %r14,0(%r14) #else + /* + * The stack frame was already set up in makecontext(), + * so we can safely use the guaranteed fields here. + * + * Note we do step on the allocated stack frame's TOC, + * but since we never return from this function (i.e. + * never restore the stack frame) this should be safe. + */ + std %r2,24(%r1) /* save TOC */ + /* Load global entry point */ mr %r12,%r14 #endif @@ -41,6 +51,10 @@ blrl /* branch to start function */ mr %r3,%r15 /* pass pointer to ucontext as argument */ nop +#if defined(_CALL_ELF) && _CALL_ELF != 1 + /* Restore TOC */ + ld %r2,24(%r1) +#endif bl CNAME(_ctx_done) /* branch to ctxt completion func */ /* * we should never return from the |