| # Allocate stack for NT, inserting stack probes every 4k pages |
| |
| .file "ntstack.asm" |
| |
| # Setup MS Structured-Exception-Handling |
| .pdata |
| .align 2 |
| .ualong ..__allocate_stack,__allocate_stack.e,0,0,__allocate_stack.b |
| |
| # Switch to the relocation section |
| .reldata |
| .globl __allocate_stack |
| .globl ..__allocate_stack |
| __allocate_stack: |
| .ualong ..__allocate_stack,.toc |
| |
| .text |
| .align 2 |
| ..__allocate_stack: |
| .function ..__allocate_stack |
| __allocate_stack.b: |
| addi 3,3,15 # round up to 16 byte alignment |
| lwz 0,0(1) # old stack link |
| rlwinm 3,3,0,0,28 |
| srawi. 4,3,12 # get # of pages to check |
| neg 3,3 # negate so we can use stwux |
| bgt- 0,.Lcheck |
| stwux 0,1,3 # small request, just decrement and return |
| blr |
| |
| .Lcheck: |
| mtctr 4 # number of pages to check |
| mr 5,1 # tmp pointer |
| .Lloop: |
| lwzu 6,-4096(5) # touch the page |
| bdnz+ .Lloop # and loop back |
| |
| stwux 0,1,3 # update stack pointer |
| blr |
| |
| __allocate_stack.e: |
| FE_MOT_RESVD..__allocate_stack: |
