circuitpython/stm/gchelper.s

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1.5 KiB
ArmAsm
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.syntax unified
.cpu cortex-m4
.thumb
.text
.align 2
@ uint gc_helper_get_regs_and_sp(r0=uint regs[10])
.global gc_helper_get_regs_and_sp
.thumb
.thumb_func
.type gc_helper_get_regs_and_sp, %function
gc_helper_get_regs_and_sp:
@ store registers into given array
str r4, [r0], #4
str r5, [r0], #4
str r6, [r0], #4
str r7, [r0], #4
str r8, [r0], #4
str r9, [r0], #4
str r10, [r0], #4
str r11, [r0], #4
str r12, [r0], #4
str r13, [r0], #4
@ return the sp
mov r0, sp
bx lr
@ this next function is now obsolete
.size gc_helper_get_regs_and_clean_stack, .-gc_helper_get_regs_and_clean_stack
@ void gc_helper_get_regs_and_clean_stack(r0=uint regs[10], r1=heap_end)
.global gc_helper_get_regs_and_clean_stack
.thumb
.thumb_func
.type gc_helper_get_regs_and_clean_stack, %function
gc_helper_get_regs_and_clean_stack:
@ store registers into given array
str r4, [r0], #4
str r5, [r0], #4
str r6, [r0], #4
str r7, [r0], #4
str r8, [r0], #4
str r9, [r0], #4
str r10, [r0], #4
str r11, [r0], #4
str r12, [r0], #4
str r13, [r0], #4
@ clean the stack from given pointer up to current sp
movs r0, #0
mov r2, sp
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b.n .entry
.loop:
str r0, [r1], #4
.entry:
cmp r1, r2
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bcc.n .loop
bx lr
.size gc_helper_get_regs_and_clean_stack, .-gc_helper_get_regs_and_clean_stack