38 lines
832 B
C++
38 lines
832 B
C++
//---
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// fxos.passes.cfg: CFG construction, as used by other passes
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//---
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#include <fxos/disassembly.h>
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#include <cassert>
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namespace FxOS {
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CfgPass::CfgPass(Disassembly &disasm):
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DisassemblyPass(disasm)
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{
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}
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void CfgPass::analyze(uint32_t pc, ConcreteInstruction &ci)
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{
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std::vector<std::string> jump_mnemonics {
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"bra", "bf", "bf.s", "bf/s", "bt", "bt.s", "bt/s",
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};
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/* Set the jmptarget fields whenever needed. This is easy because jump
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instructions have trivially computable destinations */
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for(auto mnemonic: jump_mnemonics)
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{
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if(ci.inst.mnemonic != mnemonic) continue;
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auto &args = ci.inst.args;
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assert((args.size() < 1 || args[0].kind != Argument::PcJump)
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&& "invalid use of a jump instruction\n");
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ci.jmptarget = pc + args[0].disp;
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}
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enqueue_unseen_successors(pc, ci);
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}
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} /* namespace FxOS */
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