userland: add assembly support

Move arm assembly cheat here, and start some work on x86 cheat as well.
This commit is contained in:
Ciro Santilli 六四事件 法轮功
2019-03-22 00:00:00 +00:00
parent 4943c9ed2e
commit 287c83f3f9
117 changed files with 3870 additions and 547 deletions

17
userland/arch/arm/thumb.S Normal file
View File

@@ -0,0 +1,17 @@
/* Illustrates features that are only available in thumb. */
.syntax unified
.text
.thumb_func
.global asm_main
asm_main:
asm_main_after_prologue:
/* CBZ: cmp and branch if zero instruction. Equivalent to CMP + BEQ.
* TODO create an interesting assertion here.
*/
cbz r1, 1f
1:
mov r0, 0
bx lr