# Headless post-script: collect all GP-relative references (addr, imm).
# Dump as CSV lines "GPREF,<insn_addr>,<imm>" for offline base inference.
#@category Analysis

listing = currentProgram.getListing()
lang = currentProgram.getLanguage()
gp = None
for r in lang.getRegisters():
    if r.getName().lower() == 'gp':
        gp = r
        break
print('gp register: %s' % (gp.getName() if gp else None))

from ghidra.program.model.scalar import Scalar  # noqa: E402

it = listing.getInstructions(True)
n = 0
while it.hasNext():
    ins = it.next()
    uses_gp = False
    for i in range(ins.getNumOperands()):
        for o in ins.getOpObjects(i):
            if o == gp:
                uses_gp = True
    if not uses_gp:
        continue
    imm = None
    for i in range(ins.getNumOperands()):
        for o in ins.getOpObjects(i):
            if isinstance(o, Scalar):
                imm = o.getSignedValue()
                break
        if imm is not None:
            break
    print('GPREF,%s,%s' % (ins.getAddress(), imm if imm is not None else ''))
    n += 1
print('total gp-refs: %d' % n)