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450cfad383
libelf_relocatedyn() reads the handful of DT_* tags it needs to walk the relocation tables and ignores the rest. Three more matter now. DT_PLTGOT is where the object's data base lives. An FDPIC module runs with that in the PIC base register, and every function descriptor built for it names the same base as the one its callee should run with, so without it there is nothing to put in a descriptor's second word. The DT_*_ARRAY tags are the constructor and destructor tables. These are already found through the section headers a few lines further down, and that path is kept, but the dynamic tags are the authoritative copy and an object is not obliged to carry section headers at all. Both paths now translate through libelf_addr(), so they agree on the answer rather than depending on which ran last. The tag values themselves were missing from include/elf.h and are added. Sizing the descriptor pool has to happen here rather than later. R_ARM_FUNCDESC asks the loader to manufacture a descriptor and hand back its address, which means the space must exist by the time the relocation is applied, and by then the segment has been placed. So libelf_elfsize() reserves it behind the writable data, bounded by the relocation count -- one relocation cannot ask for more than one descriptor. That bound has slack in it, but a descriptor is two words and modules are small, which is cheaper than walking every relocation twice to get an exact count. Nothing here runs for a non-FDPIC object. Built and booted mps3-an547:picostest with no change in behaviour. Assisted-by: Claude Opus 5 (1M context) <noreply@anthropic.com> Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com> |
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| arpa | ||
| crypto | ||
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| netinet | ||
| netpacket | ||
| nuttx | ||
| ssp | ||
| sys | ||
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