From 06362e204afcbda36a70482c0bd7108f7f1759d1 Mon Sep 17 00:00:00 2001
From: Max Wash <mbswash@gmail.com>
Date: Fri, 4 Jul 2025 15:33:36 +0100
Subject: [PATCH] shadow-image: write tag table entry executable info to image

---
 src/shadow-image.c | 53 ++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 47 insertions(+), 6 deletions(-)

diff --git a/src/shadow-image.c b/src/shadow-image.c
index 2bcb5d1..e1befba 100644
--- a/src/shadow-image.c
+++ b/src/shadow-image.c
@@ -31,6 +31,43 @@ static void encode_header(
 	out->h_app_magic = b_i64_htob(in->img_id);
 }
 
+static void encode_tag_executable_info(
+	const struct ec3_tag_executable_info *in,
+	struct ec3_executable *out)
+{
+	out->exe_format = b_i16_htob(in->exe_format);
+
+	switch (in->exe_format) {
+	case EC3_EXEC_ELF:
+		out->exe_elf.elf_data_offset
+			= b_i32_htob(in->exe_elf.elf_data_offset);
+		out->exe_elf.elf_data_filesz
+			= b_i32_htob(in->exe_elf.elf_data_filesz);
+		out->exe_elf.elf_data_memsz
+			= b_i32_htob(in->exe_elf.elf_data_memsz);
+		out->exe_elf.elf_data_align
+			= b_i32_htob(in->exe_elf.elf_data_align);
+
+		out->exe_elf.elf_text_offset
+			= b_i32_htob(in->exe_elf.elf_text_offset);
+		out->exe_elf.elf_text_filesz
+			= b_i32_htob(in->exe_elf.elf_text_filesz);
+		out->exe_elf.elf_text_memsz
+			= b_i32_htob(in->exe_elf.elf_text_memsz);
+		out->exe_elf.elf_text_align
+			= b_i32_htob(in->exe_elf.elf_text_align);
+
+		out->exe_elf.elf_data_vaddr
+			= b_i64_htob(in->exe_elf.elf_data_vaddr);
+		out->exe_elf.elf_text_vaddr
+			= b_i64_htob(in->exe_elf.elf_text_vaddr);
+		out->exe_elf.elf_entry = b_i64_htob(in->exe_elf.elf_entry);
+		break;
+	default:
+		break;
+	}
+}
+
 static void encode_tag(
 	const struct ec3_tag_info *in,
 	struct ec3_tag_table_entry *out)
@@ -42,6 +79,10 @@ static void encode_tag(
 	out->tag_checksum = b_i32_htob(in->tag_checksum);
 	out->tag_ident = b_i64_htob(in->tag_ident);
 	out->tag_length = b_i64_htob(in->tag_total_length);
+
+	if (in->tag_type == EC3_TAG_EXEC) {
+		encode_tag_executable_info(&in->tag_exe, &out->tag_exe);
+	}
 }
 
 static void encode_extent(
@@ -454,8 +495,8 @@ static enum ec3_status put_empty_cluster(
 	return EC3_SUCCESS;
 }
 
-/* retrieve a cached cluster from a tag io context, encode it, and write it
- * to the shadow image */
+/* retrieve a cached cluster from a tag io context, encode it, and write
+ * it to the shadow image */
 static enum ec3_status copy_cached_cluster(
 	struct shadow_image *image,
 	struct ec3_tag_ioctx *tag,
@@ -521,10 +562,10 @@ static enum ec3_status copy_cached_cluster(
 	return EC3_SUCCESS;
 }
 
-/* read a range of clusters from the source image, delimited by an extent.
- * write the clusters to the shadow image. the tag's cache is also checked for
- * each cluster in the extent. of a cached version of the cluster's contents
- * exists, that is used instead */
+/* read a range of clusters from the source image, delimited by an
+ * extent. write the clusters to the shadow image. the tag's cache is
+ * also checked for each cluster in the extent. of a cached version of
+ * the cluster's contents exists, that is used instead */
 static enum ec3_status copy_cluster_range(
 	struct ec3_image_ioctx *src,
 	struct shadow_image *dest,