56 lines
865 B
PHP
56 lines
865 B
PHP
comment "subroutine prologue"
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.macro gdbasm_enter
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st r11,@-sp
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st r13,@-sp
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mv r11,sp
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.endm
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comment "subroutine epilogue"
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.macro gdbasm_leave
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add3 sp,r11,0
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ld r13,@sp+
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ld r11,@sp+
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jmp r13
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.endm
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.macro gdbasm_call subr
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bl \subr
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.endm
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.macro gdbasm_several_nops
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nop
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nop
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nop
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nop
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.endm
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comment "exit (0)"
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.macro gdbasm_exit0
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ldi r4, 1
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ldi r0, 0
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trap 15
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.endm
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comment "crt0 startup"
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.macro gdbasm_startup
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; R14 always contains memory base address (0)
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ldi r14,0
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; Set the USER and SYSTEM stack pointers.
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ldi r0, 0 ; zero arguments
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ldi r1, 0
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mvtc r0, psw ; select SPI and set it
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ldi sp, _stack
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ldi r10, 0x8000 ; select SPU/FP and set it
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mvtc r10, psw || ldi r11, 0; clear stack frame
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ldi sp, _stack - 0x200
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ldi r13, 0
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st r11, @-sp
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st r13, @-sp
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; mv r11, sp
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.endm
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