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Fix 32-bit signal handling on ppc64. This was broken when the PSL_USERSTATIC

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macro was changed.  Since copying 64-bit srr1 into 32-bit srr1 drops the upper
32 bits, any bits set in the context were dropped, meaning the context check
fails.  Since 32-bit set_context can't change those bits anyway, copy the ones
from the current context (td->td_frame) before calling set_context().

MFC after:	3 weeks
This commit is contained in:
Justin Hibbits 2014-01-24 02:57:00 +00:00
parent f2a7dc989c
commit b65c25f54a
1 changed files with 1 additions and 0 deletions
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sys/powerpc/powerpc/exec_machdep.c
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@ -752,6 +752,7 @@ set_mcontext32(struct thread *td, const mcontext32_t *mcp)
memcpy(mcp64.mc_av,mcp->mc_av,sizeof(mcp64.mc_av));
for (i = 0; i < 42; i++)
mcp64.mc_frame[i] = mcp->mc_frame[i];
mcp64.mc_srr1 |= (td->td_frame->srr1 & 0xFFFFFFFF00000000ULL);
memcpy(mcp64.mc_fpreg,mcp->mc_fpreg,sizeof(mcp64.mc_fpreg));
error = set_mcontext(td, &mcp64);