diff options
Diffstat (limited to 'lib/utils/gchelper_m3.s')
| -rw-r--r-- | lib/utils/gchelper_m3.s | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/lib/utils/gchelper_m3.s b/lib/utils/gchelper_m3.s new file mode 100644 index 0000000000..6baedcdd0e --- /dev/null +++ b/lib/utils/gchelper_m3.s @@ -0,0 +1,62 @@ + .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 + b.n .entry +.loop: + str r0, [r1], #4 +.entry: + cmp r1, r2 + bcc.n .loop + bx lr + + .size gc_helper_get_regs_and_clean_stack, .-gc_helper_get_regs_and_clean_stack |