diff options
Diffstat (limited to 'src/cmd/ld/ldpe.c')
| -rw-r--r-- | src/cmd/ld/ldpe.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/src/cmd/ld/ldpe.c b/src/cmd/ld/ldpe.c index 39c15e6a1..033e522f2 100644 --- a/src/cmd/ld/ldpe.c +++ b/src/cmd/ld/ldpe.c @@ -135,7 +135,8 @@ ldpe(Biobuf *f, char *pkg, int64 len, char *pn) { char *name; int32 base; - int i, j, l, numaux; + uint32 l; + int i, j, numaux; PeObj *obj; PeSect *sect, *rsect; IMAGE_SECTION_HEADER sh; @@ -170,11 +171,12 @@ ldpe(Biobuf *f, char *pkg, int64 len, char *pn) // TODO return error if found .cormeta } // load string table - Bseek(f, base+obj->fh.PointerToSymbolTable+18*obj->fh.NumberOfSymbols, 0); - if(Bread(f, &l, sizeof l) != sizeof l) + Bseek(f, base+obj->fh.PointerToSymbolTable+sizeof(symbuf)*obj->fh.NumberOfSymbols, 0); + if(Bread(f, symbuf, 4) != 4) goto bad; + l = le32(symbuf); obj->snames = mal(l); - Bseek(f, base+obj->fh.PointerToSymbolTable+18*obj->fh.NumberOfSymbols, 0); + Bseek(f, base+obj->fh.PointerToSymbolTable+sizeof(symbuf)*obj->fh.NumberOfSymbols, 0); if(Bread(f, obj->snames, l) != l) goto bad; // read symbols @@ -209,6 +211,13 @@ ldpe(Biobuf *f, char *pkg, int64 len, char *pn) sect = &obj->sect[i]; if(sect->sh.Characteristics&IMAGE_SCN_MEM_DISCARDABLE) continue; + + if((sect->sh.Characteristics&(IMAGE_SCN_CNT_CODE|IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_CNT_UNINITIALIZED_DATA)) == 0) { + // This has been seen for .idata sections, which we + // want to ignore. See issues 5106 and 5273. + continue; + } + if(map(obj, sect) < 0) goto bad; @@ -230,7 +239,7 @@ ldpe(Biobuf *f, char *pkg, int64 len, char *pn) s->type = STEXT; break; default: - werrstr("unexpected flags for PE section %s", sect->name); + werrstr("unexpected flags %#08ux for PE section %s", sect->sh.Characteristics, sect->name); goto bad; } s->p = sect->base; @@ -248,6 +257,11 @@ ldpe(Biobuf *f, char *pkg, int64 len, char *pn) continue; if(rsect->sh.Characteristics&IMAGE_SCN_MEM_DISCARDABLE) continue; + if((sect->sh.Characteristics&(IMAGE_SCN_CNT_CODE|IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_CNT_UNINITIALIZED_DATA)) == 0) { + // This has been seen for .idata sections, which we + // want to ignore. See issues 5106 and 5273. + continue; + } r = mal(rsect->sh.NumberOfRelocations*sizeof r[0]); Bseek(f, obj->base+rsect->sh.PointerToRelocations, 0); for(j=0; j<rsect->sh.NumberOfRelocations; j++) { @@ -277,7 +291,7 @@ ldpe(Biobuf *f, char *pkg, int64 len, char *pn) case IMAGE_REL_AMD64_ADDR32: // R_X86_64_PC32 case IMAGE_REL_AMD64_ADDR32NB: rp->type = D_PCREL; - rp->add = le32(rsect->base+rp->off); + rp->add = (int32)le32(rsect->base+rp->off); break; case IMAGE_REL_I386_DIR32NB: case IMAGE_REL_I386_DIR32: |