From: Vineet Gupta <vgupta@synopsys.com>
Date: Wed, 27 Feb 2013 10:34:07 +0000 (+0530)
Subject: ARC: gdbserver using regset interface possibly broken
X-Git-Tag: v3.9-rc1~25^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5dc99e50d2d66f8ddeb4e20af1908ad99db0cb98;p=pandora-kernel.git

ARC: gdbserver using regset interface possibly broken

ptrace regset interface relies on ELF_NGREG for ceiling the size of user
request. So any larger request (even if legit)  would be clipped.

The existing def of ELF_NGREG didn't use user_regs_struct and was
technically one placeholder short (stop_pc) - although the current code
would still work because pt_regs includes a bunch of extra fields,
making
      ELF_NGREG >= sizeof(struct user_regs_struct)/sizeof(long)

But we need to remove this ambiguity, specially since pt_regs should NOT
be directly associated with with anything userspace-ish.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---

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