bilbo/dreamcast
1
0
Fork 0
Code Pull Requests Activity

start.s: zeroize RB

Browse Source
This commit is contained in:
Zack Buhman 2024-11-08 21:12:01 -06:00
parent 29ae10c0af
commit 77cdb3554f
1 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
start.s
View File

@ -6,9 +6,11 @@ _start:
/* mask all interrupts */ /* mask all interrupts */
mov.l imask_all,r0 mov.l imask_all,r0
mov.l zero_rb,r2
stc sr,r1 stc sr,r1
or r1,r0 or r1,r0
ldc r0,sr and r0,r2
ldc r2,sr
/* save pr */ /* save pr */
sts.l pr,@-r15 sts.l pr,@-r15
@ -31,6 +33,8 @@ stack_end_ptr:
.long __stack_end .long __stack_end
imask_all: imask_all:
.long 0xf0 .long 0xf0
zero_rb:
.long ~(1 << 29)
runtime_init_ptr: runtime_init_ptr:
.long _runtime_init .long _runtime_init
main_ptr: main_ptr: