diff options
Diffstat (limited to 'src/arbits/slbt_armap_bsd_32.c')
| -rw-r--r-- | src/arbits/slbt_armap_bsd_32.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/src/arbits/slbt_armap_bsd_32.c b/src/arbits/slbt_armap_bsd_32.c new file mode 100644 index 0000000..ed236b6 --- /dev/null +++ b/src/arbits/slbt_armap_bsd_32.c @@ -0,0 +1,147 @@ +/*******************************************************************/ +/* slibtool: a skinny libtool implementation, written in C */ +/* Copyright (C) 2016--2024 SysDeer Technologies, LLC */ +/* Released under the Standard MIT License; see COPYING.SLIBTOOL. */ +/*******************************************************************/ + +#include <stdint.h> +#include <stddef.h> +#include <stdlib.h> +#include <string.h> + +#include <slibtool/slibtool.h> +#include <slibtool/slibtool_arbits.h> +#include "slibtool_ar_impl.h" +#include "slibtool_driver_impl.h" +#include "slibtool_errinfo_impl.h" + +int slbt_ar_parse_primary_armap_bsd_32( + const struct slbt_driver_ctx * dctx, + struct slbt_archive_meta_impl * m) + +{ + struct ar_raw_armap_bsd_32 * armap; + struct ar_meta_member_info * memberp; + struct ar_meta_armap_common_32 *armapref; + struct ar_meta_armap_ref_32 * symrefs; + uint32_t idx; + uint32_t uref; + uint32_t attr; + uint32_t nsyms; + uint32_t nstrs; + uint32_t sizeofrefs_le; + uint32_t sizeofrefs_be; + uint32_t sizeofrefs; + uint32_t sizeofstrs; + const char * ch; + const char * cap; + unsigned char * uch; + unsigned char (*mark)[0x04]; + + armap = &m->armaps.armap_bsd_32; + memberp = m->memberv[0]; + + mark = memberp->ar_object_data; + + armap->ar_size_of_refs = mark; + uch = *mark++; + + armap->ar_first_name_offset = mark; + + sizeofrefs_le = (uch[3] << 24) + (uch[2] << 16) + (uch[1] << 8) + uch[0]; + sizeofrefs_be = (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3]; + + if (sizeofrefs_le < memberp->ar_object_size - sizeof(*mark)) { + sizeofrefs = sizeofrefs_le; + attr = AR_ARMAP_ATTR_LE_32; + + } else if (sizeofrefs_be < memberp->ar_object_size - sizeof(*mark)) { + sizeofrefs = sizeofrefs_be; + attr = AR_ARMAP_ATTR_BE_32; + } else { + return SLBT_CUSTOM_ERROR( + dctx, + SLBT_ERR_AR_INVALID_ARMAP_SIZE_OF_REFS); + } + + nsyms = sizeofrefs / sizeof(struct ar_raw_armap_ref_32); + mark += (sizeofrefs / sizeof(*mark)); + + armap->ar_size_of_strs = mark; + uch = *mark++; + + sizeofstrs = (attr == AR_ARMAP_ATTR_LE_32) + ? (uch[3] << 24) + (uch[2] << 16) + (uch[1] << 8) + uch[0] + : (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3]; + + if (sizeofstrs > memberp->ar_object_size - 2*sizeof(*mark) - sizeofrefs) + return SLBT_CUSTOM_ERROR( + dctx, + SLBT_ERR_AR_INVALID_ARMAP_SIZE_OF_STRS); + + m->symstrs = (const char *)mark; + + cap = m->symstrs; + cap += sizeofstrs; + + if ((cap == m->symstrs) && nsyms) + return SLBT_CUSTOM_ERROR( + dctx, + SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE); + + if (nsyms && !m->symstrs[0]) + return SLBT_CUSTOM_ERROR( + dctx, + SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE); + + for (ch=&m->symstrs[1],nstrs=0; ch<cap; ch++) { + if (!ch[0] && !ch[-1] && (nstrs < nsyms)) + return SLBT_CUSTOM_ERROR( + dctx, + SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE); + + if (!ch[0] && ch[-1] && (nstrs < nsyms)) + nstrs++; + } + + if (nstrs != nsyms) + return SLBT_CUSTOM_ERROR( + dctx, + SLBT_ERR_AR_INVALID_ARMAP_STRING_TABLE); + + if (!(m->symstrv = calloc(nsyms + 1,sizeof(const char *)))) + return SLBT_SYSTEM_ERROR(dctx,0); + + if (!(m->armaps.armap_symrefs_32 = calloc(nsyms + 1,sizeof(*symrefs)))) + return SLBT_SYSTEM_ERROR(dctx,0); + + mark = armap->ar_first_name_offset; + symrefs = m->armaps.armap_symrefs_32; + + for (idx=0,uch=*++mark; idx<nsyms; idx++,uch=*++mark) { + uref = (attr == AR_ARMAP_ATTR_BE_32) + ? (uch[0] << 24) + (uch[1] << 16) + (uch[2] << 8) + uch[3] + : (uch[3] << 24) + (uch[2] << 16) + (uch[1] << 8) + uch[0]; + + symrefs[idx].ar_member_offset = uref; + mark++; + } + + armap->ar_string_table = m->symstrv; + + armapref = &m->armaps.armap_common_32; + armapref->ar_member = memberp; + armapref->ar_symrefs = symrefs; + armapref->ar_armap_bsd = armap; + armapref->ar_armap_attr = AR_ARMAP_ATTR_BSD | attr; + armapref->ar_num_of_symbols = nsyms; + armapref->ar_size_of_refs = sizeofrefs; + armapref->ar_size_of_strs = sizeofstrs; + armapref->ar_string_table = m->symstrs; + + m->armaps.armap_nsyms = nsyms; + + m->armeta.a_armap_primary.ar_armap_common_32 = armapref; + + return 0; +} |