FreeCalypso > hg > freecalypso-sw
annotate target-utils/c139-lldbg/entry.S @ 1034:405b5469abc4 default tip
top README: repository change notice
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 12 Jun 2016 19:06:34 +0000 |
parents | d7830aee0d35 |
children |
rev | line source |
---|---|
955
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
1 .text |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
2 .globl _entry |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
3 _entry: |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
4 .code 16 |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
5 bx pc |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
6 nop |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
7 |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
8 .code 32 |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
9 stmfd sp!, {r0-r12,lr} |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
10 mrs r0, CPSR |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
11 mov r1, sp |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
12 /* supervisor mode, disable all interrupts */ |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
13 msr CPSR_c, #0xd3 |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
14 ldr sp, =stack_bottom |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
15 /* save entry SP and CPSR */ |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
16 ldr r2, =lldbg_entry_cpsr |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
17 str r0, [r2] |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
18 ldr r2, =lldbg_entry_sp |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
19 str r1, [r2] |
d7830aee0d35
c139-lldbg hack concocted
Mychaela Falconia <falcon@ivan.Harhan.ORG>
parents:
diff
changeset
|
20 b main |