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1         comment "subroutine prologue"
2         .macro gdbasm_enter
3         st r11,@-sp
4         st r13,@-sp
5         mv r11,sp
6         .endm
7
8         comment "subroutine epilogue"
9         .macro gdbasm_leave
10         add3 sp,r11,0
11         ld   r13,@sp+
12         ld   r11,@sp+
13         jmp  r13
14         .endm
15
16         .macro gdbasm_call subr
17         bl \subr
18         .endm
19
20         .macro gdbasm_several_nops
21         nop
22         nop
23         nop
24         nop
25         .endm
26
27         comment "exit (0)"
28         .macro gdbasm_exit0
29         ldi r4, 1
30         ldi r0, 0
31         trap 15
32         .endm
33
34         comment "crt0 startup"
35         .macro gdbasm_startup
36 ; R14 always contains memory base address (0)
37
38         ldi     r14,0
39
40 ; Set the USER and SYSTEM stack pointers.
41
42         ldi     r0, 0           ; zero arguments
43         ldi     r1, 0
44         mvtc    r0, psw         ; select SPI and set it
45         ldi     sp, _stack
46         ldi     r10, 0x8000     ; select SPU/FP and set it
47         mvtc    r10, psw || ldi r11, 0;  clear stack frame
48         ldi     sp, _stack - 0x200
49         ldi     r13, 0
50
51         st      r11, @-sp
52         st      r13, @-sp
53 ;       mv      r11, sp
54
55         .endm
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