driver: pe_lib_get_unit_ctx(): added handling of archives and archive members.

2 files changed, 125 insertions, 2 deletions

diff --git a/src/driver/pe_amain.c b/src/driver/pe_amain.c
index 173f391..606184d 100644
--- a/src/driver/pe_amain.c
+++ b/src/driver/pe_amain.c
@@ -13,7 +13,10 @@
 
 #ifndef PERK_DRIVER_FLAGS
 #define PERK_DRIVER_FLAGS	PERK_DRIVER_VERBOSITY_ERRORS \
-				| PERK_DRIVER_VERBOSITY_UTILITY
+				| PERK_DRIVER_VERBOSITY_UTILITY \
+				| PERK_DRIVER_AR_STRICT_PE \
+				| PERK_DRIVER_AR_STRICT_PE_ARCH \
+				| PERK_DRIVER_AR_OBJECT_VECTOR
 #endif
 
 static const char vermsg[] = "%s%s%s (git://midipix.org/perk): "
diff --git a/src/driver/pe_unit_ctx.c b/src/driver/pe_unit_ctx.c
index 76823b0..0e0373a 100644
--- a/src/driver/pe_unit_ctx.c
+++ b/src/driver/pe_unit_ctx.c
@@ -11,20 +11,118 @@
 #include <sys/mman.h>
 
 #include <perk/perk.h>
+#include <perk/perk_arbits.h>
+#include "perk_ar_impl.h"
 #include "perk_driver_impl.h"
 #include "perk_errinfo_impl.h"
 
 static int pe_lib_free_unit_ctx_impl(struct pe_unit_ctx_impl * ctx, int ret)
 {
+	struct pe_image_meta ** pmeta;
 	if (ctx) {
+		for (pmeta=ctx->objmeta; pmeta && *pmeta; pmeta++)
+			pe_meta_free_image_meta(*pmeta);
+
+		pe_ar_free_archive_meta(ctx->armeta);
 		pe_meta_free_image_meta(ctx->meta);
 		pe_raw_unmap_raw_image(&ctx->map);
+		free(ctx->objmeta);
 		free(ctx);
 	}
 
 	return ret;
 }
 
+static int pe_lib_create_object_vector_or_verify_archive(
+	const struct pe_driver_ctx *    dctx,
+	struct pe_unit_ctx_impl *       ctx)
+{
+	struct pe_archive_meta *        actx;
+	struct pe_archive_meta_impl *   ictx;
+	struct pe_driver_ctx_impl *     idctx;
+	bool                            fvector;
+	bool                            fstrict;
+	bool                            fpurearch;
+	struct pe_image_meta *          meta;
+	struct pe_image_meta **         objmeta;
+	size_t                          veclen;
+	struct pe_raw_image             map;
+	struct ar_meta_member_info **   pmember;
+	struct pe_error_info **         errinfp;
+	enum pe_abi                     m_abi;
+	enum pe_subtype                 m_subtype;
+
+	fvector   = (dctx->cctx->drvflags & PERK_DRIVER_AR_OBJECT_VECTOR);
+	fstrict   = (dctx->cctx->drvflags & PERK_DRIVER_AR_STRICT_PE);
+	fpurearch = (dctx->cctx->drvflags & PERK_DRIVER_AR_STRICT_PE_ARCH);
+
+	if (!fvector && !fstrict && !fpurearch)
+		return 0;
+
+	actx   = ctx->armeta;
+	ictx   = pe_archive_meta_ictx(actx);
+	idctx  = pe_get_driver_ictx(dctx);
+	veclen = ictx->nentries + 1;
+
+	if (fvector && !(ctx->objmeta = calloc(veclen,sizeof(meta))))
+		return PERK_BUFFER_ERROR(dctx);
+
+	if (!actx->a_memberv)
+		return 0;
+
+	for (pmember=actx->a_memberv,objmeta=ctx->objmeta; *pmember; pmember++) {
+		errinfp = idctx->errinfp;
+
+		switch (pmember[0]->ar_member_attr) {
+			case AR_MEMBER_ATTR_ARCHIVE:
+				return PERK_CUSTOM_ERROR(dctx,
+					PERK_ERR_AR_NESTED_ARCHIVE);
+
+			case AR_MEMBER_ATTR_ARMAP:
+			case AR_MEMBER_ATTR_NAMESTRS:
+			case AR_MEMBER_ATTR_LINKINFO:
+				break;
+
+			default:
+				map.map_addr = pmember[0]->ar_object_data;
+				map.map_size = pmember[0]->ar_object_size;
+
+				if (!pe_meta_get_image_meta(dctx,&map,&meta)) {
+					if (fpurearch && (objmeta == ctx->objmeta)) {
+						m_abi     = meta->m_abi;
+						m_subtype = meta->m_subtype;
+
+					} else if (fpurearch) {
+						if ((meta->m_abi != m_abi) || (meta->m_subtype != m_subtype))
+							return PERK_CUSTOM_ERROR(dctx,
+								PERK_ERR_AR_MIXED_PE_MEMBERS);
+					}
+
+					if (fvector) {
+						*objmeta++ = meta;
+					} else {
+						pe_meta_free_image_meta(meta);
+					};
+
+
+				} else if (fstrict || fpurearch) {
+					return PERK_CUSTOM_ERROR(dctx,
+						PERK_ERR_AR_NON_PE_MEMBERS);
+
+				} else {
+					 idctx->errinfp = errinfp;
+
+					for (; *errinfp; )
+						*errinfp++ = 0;
+				}
+
+				break;
+		}
+	}
+
+	return 0;
+}
+
 int pe_lib_get_unit_ctx(
 	const struct pe_driver_ctx *	dctx,
 	const char *			path,
@@ -32,6 +130,8 @@ int pe_lib_get_unit_ctx(
 {
 	struct pe_unit_ctx_impl *	ctx;
 	int				prot;
+	char *                          mark;
+	size_t                          siglen;
 
 	if (!dctx)
 		return PERK_CUSTOM_ERROR(
@@ -51,13 +151,33 @@ int pe_lib_get_unit_ctx(
 		return pe_lib_free_unit_ctx_impl(ctx,
 			PERK_NESTED_ERROR(dctx));
 
-	if (pe_meta_get_image_meta(dctx,&ctx->map,&ctx->meta))
+	if (ctx->map.map_size < (siglen = sizeof(struct ar_raw_signature)))
+		return pe_lib_free_unit_ctx_impl(ctx,
+			PERK_CUSTOM_ERROR(
+				dctx,
+				PERK_ERR_INVALID_IMAGE));
+
+	if (!strncmp((mark = ctx->map.map_addr),AR_SIGNATURE,siglen)) {
+		ctx->armap.map_addr = ctx->map.map_addr;
+		ctx->armap.map_size = ctx->map.map_size;
+
+		if (pe_ar_get_archive_meta(dctx,&ctx->armap,&ctx->armeta))
+			return pe_lib_free_unit_ctx_impl(ctx,
+				PERK_NESTED_ERROR(dctx));
+
+		if (pe_lib_create_object_vector_or_verify_archive(dctx,ctx) < 0)
+			return pe_lib_free_unit_ctx_impl(ctx,
+				PERK_NESTED_ERROR(dctx));
+
+	} else if (pe_meta_get_image_meta(dctx,&ctx->map,&ctx->meta)) {
 		return pe_lib_free_unit_ctx_impl(ctx,
 			PERK_NESTED_ERROR(dctx));
+	}
 
 	ctx->path	= path;
 	ctx->uctx.path	= &ctx->path;
 	ctx->uctx.meta	= ctx->meta;
+	ctx->uctx.armeta= ctx->armeta;
 
 	*pctx = &ctx->uctx;
 	return 0;