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convert procs_windows_amd64.asm to tabs

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flysand7
2023-10-20 23:31:09 +11:00
parent ba5df8edca
commit 05a9652f76
1 changed files with 27 additions and 27 deletions
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54
core/runtime/procs_windows_amd64.asm
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@@ -45,35 +45,35 @@ section .text
; totally supports this kind of stack.
__chkstk:
;; Allocate 16 bytes to store values of r10 and r11
sub rsp, 0x10
mov [rsp], r10
mov [rsp+0x8], r11
;; Set r10 to point to the stack as of the moment of the function call
lea r10, [rsp+0x18]
;; Subtract r10 til the bottom of the stack allocation, if we overflow
;; reset r10 to 0, we'll crash with segfault anyway
xor r11, r11
sub r10, rax
cmovb r10, r11
;; Load r11 with the bottom of the stack (lowest allocated address)
mov r11, gs:[0x10] ; NOTE(flysand): gs:[0x10] is stack limit
;; If the bottom of the allocation is above the bottom of the stack,
;; we don't need to probe
cmp r10, r11
jnb .end
;; Align the bottom of the allocation down to page size
and r10w, 0xf000
sub rsp, 0x10
mov [rsp], r10
mov [rsp+0x8], r11
;; Set r10 to point to the stack as of the moment of the function call
lea r10, [rsp+0x18]
;; Subtract r10 til the bottom of the stack allocation, if we overflow
;; reset r10 to 0, we'll crash with segfault anyway
xor r11, r11
sub r10, rax
cmovb r10, r11
;; Load r11 with the bottom of the stack (lowest allocated address)
mov r11, gs:[0x10] ; NOTE(flysand): gs:[0x10] is stack limit
;; If the bottom of the allocation is above the bottom of the stack,
;; we don't need to probe
cmp r10, r11
jnb .end
;; Align the bottom of the allocation down to page size
and r10w, 0xf000
.loop:
;; Move the pointer to the next guard page, and touch it by loading 0
;; into that page
lea r11, [r11-0x1000]
mov byte [r11], 0x0
;; Did we reach the bottom of the allocation?
cmp r10, r11
jnz .loop
lea r11, [r11-0x1000]
mov byte [r11], 0x0
;; Did we reach the bottom of the allocation?
cmp r10, r11
jnz .loop
.end:
;; Restore previous r10 and r11 and return
mov r10, [rsp]
mov r11, [rsp+0x8]
add rsp, 0x10
ret
mov r10, [rsp]
mov r11, [rsp+0x8]
add rsp, 0x10
ret