This will work, except it will be -4 and w1 for ILP32. Thanks, Andrew Pinski ________________________________ From: Venkataramanan Kumar <venkataramanan.ku...@linaro.org> Sent: Sunday, August 18, 2013 10:09 PM To: Pinski, Andrew Cc: Linaro Toolchain Subject: Re: [ACTIVITY] 12 - 16 August 2013
Hi Andrew, I am not changing the TCB structure. I am placing it before TCB like the way done in IA64. +# define TLS_PRE_TCB_SIZE \ + (sizeof (struct pthread) \ + + (PTHREAD_STRUCT_END_PADDING < 2 * sizeof (uintptr_t) \ + ? ((2 * sizeof (uintptr_t) + __alignof__ (struct pthread) - 1) \ + & ~(__alignof__ (struct pthread) - 1)) \ + : 0)) And accessing the stack guard in compiler will be like. msr tpidr_el0, x0 ldr x1, [x0-8] Let me know if this will have impact on your changes. Attached is the RFC patch. regards, Venkat. On 19 August 2013 10:06, Pinski, Andrew <andrew.pin...@caviumnetworks.com<mailto:andrew.pin...@caviumnetworks.com>> wrote: I think changing TCB will be changing the ABI. So we don't want to do that I think. Also have you thought about how TCB changes are going to change ILP32 too. I am almost ready to submit the patches for ILP32 out for review on the binutils, glibc, gcc, and kernel lists. Thanks, Andrew ________________________________ From: linaro-toolchain-boun...@lists.linaro.org<mailto:linaro-toolchain-boun...@lists.linaro.org> <linaro-toolchain-boun...@lists.linaro.org<mailto:linaro-toolchain-boun...@lists.linaro.org>> on behalf of Venkataramanan Kumar <venkataramanan.ku...@linaro.org<mailto:venkataramanan.ku...@linaro.org>> Sent: Sunday, August 18, 2013 9:27 PM To: Linaro Toolchain Subject: [ACTIVITY] 12 - 16 August 2013 == Progress == * Libssp support for AArch64 TCWG 23: Understood the TCB datastructure. Sent a mail to the internal team on the changes needed and where to put stack gaurd slot in TCB. Got some comments from Matt. Worked on the changes in eglibc. Tested a simple stack smashing program in V8 model by moving the patched run time linker and glibc. Sent the RFC internally for review. * 4 day week 15-August India naional holiday. == Plan == * Post RFC patch for Libssp support for AArch64 in GCC and glibc TCWG-23 * Continue testing the patch for Libssp support for AArch64 in GCC and glibc TCWG-23 * Backport and test revision 201406 to linaro branch. == Issues == * LTO/PGO work stopped now since libssp support priority is more. * Waiting for Marcus feedback for Matt comments on gprof patches TCWG-20. Misc ------ 23-August availing leave.
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