[PowerPC] Save a dword in the powerpc64 signal trampoline
In r291668, an instruction was added to sigcode64.S without the nop pad at the end being taken out. Due to alignment, this means that a dword is being wasted on the shared page for no reason. Take out this nop, and add some comments while I'm here. Reviewed by: jhibbits Sponsored by: Tag1 Consulting, Inc. Differential Revision: https://reviews.freebsd.org/D23055
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=356856
@ -63,9 +63,13 @@ CNAME(sigcode64_elfv2):
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addi 3,1,112+SF_UC /* restore sp, and get &frame->sf_uc */
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li 0,SYS_sigreturn
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sc /* sigreturn(scp) */
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/*
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* If we get back to here, it means sigreturn failed.
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* As such, we are now stuck in the wrong context.
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* Exit immediately without touching the stack.
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*/
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li 0,SYS_exit
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sc /* exit(errno) */
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nop /* align to doubleword */
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endsigcode64:
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.data
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