[Valgrind-developers] ptrace(2) unsupported in Valgrind for the Power architecture.

[Paralkar Anmol-B. <B0...@fr...>]

Hello,

 I am trying to run GDB on my port of Valgrind (3.8.1) to Freescale's e500v2 SPE ISA on linux (3.x),
 to test the port, Valgrind, and hopefully, use the findings to fix issues in GDB itself. GDB runs
 on Valgrind till the point that it makes a ptrace(2) call, which is reported as unsupported.
 As instructed, I began by following the direction given in the file README_MISSING_SYSCALL_OR_IOCTL,
 and found that there used to be ptrace support (in coregrind/m_syswrap/syswrap-ppc32-linux.c) - but,
 it is all commented out. So, ptrace is unsupported on ppc-{32, 64}. (I looked at the svn log,
 but did not find any reason why. Also looked up Bugzilla). I did find:

 http://article.gmane.org/gmane.comp.debugging.valgrind/10225/match=ptrace

 and perhaps in some way related:

 http://thread.gmane.org/gmane.comp.debugging.valgrind.devel/819

 Please could you help me understand the issues involved in getting ptrace(2) working on POWER again?

 Thank you very much.

Sincerely,
Anmol P. Paralkar