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Length: 4454 (0x1166)
Types: TextFile
Names: »CALLBACK_ASM«
└─⟦a7d1ea751⟧ Bits:30000550 8mm tape, Rational 1000, !users!projects 94_04_11
└─ ⟦129cab021⟧ »DATA«
└─⟦this⟧
└─⟦f64eaa120⟧ Bits:30000752 8mm tape, Rational 1000, !projects 93 02 16
└─ ⟦6f12a12be⟧ »DATA«
└─⟦this⟧
└─⟦2f6cfab89⟧ Bits:30000547 8mm tape, Rational 1000, !projects 94-01-04
└─ ⟦d65440be7⟧ »DATA«
└─⟦this⟧
.set R0,0
.set SP,1
.set R2,2
.set R3,3
.set R4,4
.set R5,5
.set R11,11
.set R12,12
.set R19,19
.set R20,20
.set R29,29
# On entry,
# R3 -> Ada 'subprogram value (not C callable)
# R4 -> output parameter area
#
# On return, R3 -> "C" function descriptor that can be called
# from C, and will call the Ada program described by the
# input parameter;
.csect .ada_to_c{pr},3
.globl .ada_to_c{pr}
#
# Create the C callable function descriptor from the Ada subprogram
# value.
#
l R5,T001(R2) # get entry point of assembly bridge
st R2,4(R4) # save toc into output parm
st R5,0(R4) # set into output param
st R3,8(R4) # save Ada subprogram value
cal R3,0(R4) # R3 := R4
br
.csect .ada_to_c_bridge{pr},3
.globl .ada_to_c_bridge{pr}
#
# R11 -> ada subprogram_value
#
mflr R12
cal SP,-128(SP)
ai R0,R11,0 # preserve R11
mfcr R11
stm R11,36(SP) # save important stuff, so we can call Ada
ai R11,R0,0 # restore R11
l R12,0(R11) # R12 = ada entry point
mtlr R12
l R29,8(R11) # load static link
cal R20,0(0) # stack top is infinite....
brl
ai R3,R19,0 # move function return to C register
lm R11,36(SP) # restore important stuff
mtcr R11
mtlr R12
cal SP,128(SP)
br
.toc
T001: .tc T001{tc},.ada_to_c_bridge{pr}