git://gcc.gnu.org / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 979721f8 MM |
1 | # Allocate stack for NT, inserting stack probes every 4k pages |
| 2 | ||
| 3 | .file "ntstack.asm" | |
| 4 | ||
| 5 | # Setup MS Structured-Exception-Handling | |
| 6 | .pdata | |
| 7 | .align 2 | |
| 8 | .ualong ..__allocate_stack,__allocate_stack.e,0,0,__allocate_stack.b | |
| 9 | ||
| 10 | # Switch to the relocation section | |
| 11 | .reldata | |
| 12 | .globl __allocate_stack | |
| 13 | .globl ..__allocate_stack | |
| 14 | __allocate_stack: | |
| 15 | .ualong ..__allocate_stack,.toc | |
| 16 | ||
| 17 | .text | |
| 18 | .align 2 | |
| 19 | ..__allocate_stack: | |
| 20 | .function ..__allocate_stack | |
| 21 | __allocate_stack.b: | |
| d0bac83e | 22 | addi 3,3,15 # round up to 16 byte alignment |
| 979721f8 | 23 | lwz 0,0(1) # old stack link |
| d0bac83e | 24 | rlwinm 3,3,0,0,28 |
| 979721f8 MM |
25 | srawi. 4,3,12 # get # of pages to check |
| 26 | neg 3,3 # negate so we can use stwux | |
| 27 | bgt- 0,.Lcheck | |
| 28 | stwux 0,1,3 # small request, just decrement and return | |
| 29 | blr | |
| 30 | ||
| 31 | .Lcheck: | |
| 32 | mtctr 4 # number of pages to check | |
| 33 | mr 5,1 # tmp pointer | |
| 34 | .Lloop: | |
| 35 | lwzu 6,-4096(5) # touch the page | |
| 36 | bdnz+ .Lloop # and loop back | |
| 37 | ||
| 38 | stwux 0,1,3 # update stack pointer | |
| 39 | blr | |
| 40 | ||
| 41 | __allocate_stack.e: | |
| 42 | FE_MOT_RESVD..__allocate_stack: |