commit 166bae116c2735bbfd353b135de67878e1e5744b Author: Michael Neumann <mneum...@ntecs.de> Date: Wed Jul 23 01:27:48 2014 +0200
Add field to tls_tcb to support segmented stacks in LLVM When segmented stack support is enabled, LLVM adds code in front of every function to check if the stack is already exhausted, in which case it calls __morestack. For this reason LLVM needs to know the lower boundary of the stack to check against the stack pointer. The stack boundary can be stored in this per-thread field (tcb_segstack) and accessed via %fs:32 (x86_64) or %fs:16 (i386) from the code generated by LLVM. Summary of changes: sys/cpu/i386/include/tls.h | 4 +++- sys/cpu/x86_64/include/tls.h | 4 +++- 2 files changed, 6 insertions(+), 2 deletions(-) http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/166bae116c2735bbfd353b135de67878e1e5744b -- DragonFly BSD source repository