69 lines
1.5 KiB
PHP
69 lines
1.5 KiB
PHP
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### entry point code
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.macro gdbasm_startup
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# Align the stack pointer to an 8-byte boundary.
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lghi %r0,-16
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ngr %r15,%r0
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# Reserve space for the standard stack frame:
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# back chain, and space for the callee to save its registers.
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aghi %r15,-168
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# Zero this frame's back chain pointer.
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xc 0(8,%r15),0(%r15)
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.endm
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### Call a function.
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.macro gdbasm_call subr
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brasl %r14, \subr
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.endm
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### Exit with a zero status.
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.macro gdbasm_exit0
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lghi %r2, 0
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svc 1
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.endm
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### Standard subroutine prologue.
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.macro gdbasm_enter
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# Save all the callee-saves registers. What the heck.
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stmg %r6,%r15,48(%r15)
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# Allocate the stack frame, and write the back chain pointer.
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# Keep the original SP in %r11.
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lgr %r11,%r15
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aghi %r15,-168
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stg %r11,0(%r15)
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.endm
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### Standard subroutine epilogue.
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.macro gdbasm_leave
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# Restore all our registers. This also pops the frame, and
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# restores our return address.
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lmg %r6,%r15,216(%r15)
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# Jump to the return address.
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br %r14
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.endm
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### Several nops.
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.macro gdbasm_several_nops
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lr %r0, %r0
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lr %r0, %r0
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lr %r0, %r0
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lr %r0, %r0
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.endm
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### Declare an `int' variable.
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.macro gdbasm_datavar name value
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.data
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\name:
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.long \value
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.endm
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