mkiiskila commented on a change in pull request #474: PIC32: Fix stack align
URL: https://github.com/apache/mynewt-core/pull/474#discussion_r130982969
 
 

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 File path: kernel/os/include/os/arch/pic32/os/os_arch.h
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 @@ -38,7 +38,8 @@ typedef uint32_t os_sr_t;
 /* Stack type, aligned to a 32-bit word. */
 #define OS_STACK_PATTERN    (0xdeadbeef)
 
-typedef uint32_t os_stack_t;
+/* uint64_t in an attempt to get the stack 8 aligned */
+typedef uint64_t os_stack_t;
 
 Review comment:
   I would also adjust stack_top in os_arch_task_stack_init(), if it was not 
aligned on 8-byte boundary.
   
   The use case that would worry me is where user allocates the stack with 
malloc(), as opposed to declaring a global variable. malloc() might, or might 
not, be returning 8-byte aligned data.
   
   typedef'ing os_stack_t as uint64, or adding that aligned() attribute seems 
useful also.
 
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