m2-internship/dwarf-assembly
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dwarf-assembly/src/README.md
Théophile Bastian 209e668505 Add READMEs
2018-05-15 18:13:09 +02:00

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Dwarf-assembly

Generates C code from the DWARF embedded in an ELF file. This code can then be compiled into a .so, and used to unwind stack frames.

Options

Switch generation policy

The code can either generate one big switch statement for every PC in the ELF, or one switch and a function per FDE, plus a lookup function.

One of the two options must be passed:

  • --switch-per-func: one switch and function per FDE;
  • --global-switch: a single big switch for the whole ELF.

PC list

Instead of generating interval switches (eg case 0x42 ... 0x100), it is possible to provide a binary file (generated by ../extract_pc.py) containing a list of all PCs in the ELF. The file contains one 8-bytes chunk per PC, which is the PC in little endian.

--pc-list PC_LIST_FILE_PATH