Jag har inte hängt med i allt som händer i kärnan (går det ens? haha)
Noterade detta:
#
# Memory initialization
#
CONFIG_CC_HAS_AUTO_VAR_INIT_PATTERN=y
CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_BARE=y
CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO=y
# CONFIG_INIT_STACK_NONE is not set
# CONFIG_INIT_STACK_ALL_PATTERN is not set
CONFIG_INIT_STACK_ALL_ZERO=y # CONFIG_GCC_PLUGIN_STACKLEAK is not set
# CONFIG_INIT_ON_ALLOC_DEFAULT_ON is not set
# CONFIG_INIT_ON_FREE_DEFAULT_ON is not set
CONFIG_CC_HAS_ZERO_CALL_USED_REGS=y
# CONFIG_ZERO_CALL_USED_REGS is not set
# end of Memory initialization
vilket ger en fråga med flera svar. Vad är "korrekt" svar? (bold, italic textrad ovan)
Jag kollade med Archlinux 6.1.16 kärna, blev inte klokare...
* Memory initialization
*
Initialize kernel stack variables at function entry
> 1. no automatic stack variable initialization (weakest) (INIT_STACK_NONE)
2. zero-init structs marked for userspace (weak) (GCC_PLUGIN_STRUCTLEAK_USER) (NEW)
3. zero-init structs passed by reference (strong) (GCC_PLUGIN_STRUCTLEAK_BYREF) (NEW)
4. zero-init everything passed by reference (very strong) (GCC_PLUGIN_STRUCTLEAK_BYREF_ALL) (NEW)
* This gcc plugin is needed for tracking the lowest border of the kernel stack.
* It instruments the kernel code inserting stackleak_track_stack() calls:
* - after alloca();
* - for the functions with a stack frame size greater than or equal
* to the "track-min-size" plugin parameter.
