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088dc24508
Unlike GNU ld, which can be instructed to emit symbol based static relocations into fully linked binaries using the --emit-relocs command line switch, the RVCT armlink tool can only emit dynamic relocations into the PT_DYNAMIC segment. This has two consequences . we can only identify absolute relocations, so there is no way to fix up relative relocations between sections, or check their validity in the PE/COFF layout . the r_offset fields of the PT_DYNAMIC DT_REL entries are relative either to the base of the image or to any of its segments but *not* to the base of the input section that contains the location they refer to, and converting them to PE/COFF image offsets is non-trivial unless the sections are laid out in the same way in the ELF and PE/COFF versions of the binary. There is really only one way to deal with this, and that is to require that the ELF and PE/COFF versions of the binary are identical in memory. So enforce that in the code. Also, fix the utterly broken relocation fixup code that dereferences ELF32_R_SYM(r_info) both as a 1-based program header index and a 0-based section header index. If this code ever produced working binaries, it was purely by chance. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Liming Gao <liming.gao@intel.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19236 6f19259b-4bc3-4df7-8a09-765794883524 |
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| .. | ||
| BootSectImage | ||
| Common | ||
| EfiLdrImage | ||
| EfiRom | ||
| GenBootSector | ||
| GenCrc32 | ||
| GenFfs | ||
| GenFv | ||
| GenFw | ||
| GenPage | ||
| GenSec | ||
| GenVtf | ||
| GnuGenBootSector | ||
| Include | ||
| LzmaCompress | ||
| Makefiles | ||
| PyEfiCompressor | ||
| PyUtility | ||
| Split | ||
| TianoCompress | ||
| VfrCompile | ||
| VolInfo | ||
| GNUmakefile | ||
| Makefile | ||