Function lookupLabel

src/e9patch/e9trampoline.cpp:724–742

* Lookup a label value. */

 * Lookup a label value.
 */
static off_t lookupLabel(const Binary *B, const char *label,
    const Instr *I, intptr_t addr, const LabelSet &labels)
{
    if (label[0] != '.' && label[1] != 'L')
        error("failed to build trampoline at address 0x%lx; "
            "unknown prefix for \"%s\" label", I->addr, label);

    intptr_t target = getBuiltinLabelAddress(B, I, label);
    if (target != INTPTR_MIN)
        return target - addr;

    // Check for user labels:
    Label L(I, label);
    auto i = labels.find(L);
    if (i == labels.end())
        error("failed to build trampoline at address 0x%lx; "
            "unknown label \"%s\"", I->addr, label); 
    return i->second - addr;
}

/*
 * Build the trampoline bytes.