Merge pull request 'Add section headers for better debugging' (#2) from tbsliver/return-42-improvement into main

Reviewed-on: #2

programs/return-42/00_elf_header.txt

@@ -48,8 +48,8 @@
 40 00 00 00 00 00 00 00
 
 # Section Header Table Offset - e_shoff
-# We dont have one! no offset
-00 00 00 00 00 00 00 00
+# 64 + 56 + 16 + 16
+98 00 00 00 00 00 00 00
 
 # Processor Flags - e_flags - No flags set
 00 00 00 00
@@ -68,9 +68,9 @@
 
 # Section Header Count - e_shnum
 # Set to 3 based on example
-00 00
+03 00
 
 ##Section Header String Table Index - e_shstrndx
 # Set to 2 based on example
-00 00
+02 00
 

programs/return-42/03_string_table.txt

@@ -0,0 +1,3 @@
+# String table. ".shstrab\0.text\0" -- 16 bytes
+2e 73 68 73 74 72 74 61 62 00 2e 74 65 78 74 00
+

programs/return-42/04_section_header_null.txt

@@ -0,0 +1,29 @@
+# Section header table, section 0 -- null -- 64 bytes
+
+# 0x0A = offset to the name of the section in the string table
+00 00 00 00
+
+# 1 = type: null
+00 00 00 00
+
+# flags = executable | occupies memory
+00 00 00 00 00 00 00 00
+
+# address in virtual memory of this section
+00 00 00 00 00 00 00 00
+
+# offset in the file of this section (start of program code)
+00 00 00 00 00 00 00 00
+
+# size of this section in the file: 16 bytes
+00 00 00 00 00 00 00 00
+
+# sh_link -- not used for this section
+00 00 00 00 00 00 00 00
+
+# 0x01 = alignment code: default??
+00 00 00 00 00 00 00 00
+
+# sh_entsize: not used
+00 00 00 00 00 00 00 00
+

programs/return-42/05_section_header_program.txt

@@ -0,0 +1,29 @@
+# Section header table, section 1 -- program text -- 64 bytes
+
+# 0x0A = offset to the name of the section in the string table
+0a 00 00 00
+
+# 1 = type: program data
+01 00 00 00
+
+# flags = executable | occupies memory
+06 00 00 00 00 00 00 00
+
+# address in virtual memory of this section
+78 00 40 00 00 00 00 00
+
+# offset in the file of this section (start of program code)
+78 00 00 00 00 00 00 00
+
+# size of this section in the file: 16 bytes
+10 00 00 00 00 00 00 00
+
+# sh_link -- not used for this section
+00 00 00 00 00 00 00 00
+
+# 0x01 = alignment code: default??
+01 00 00 00 00 00 00 00
+
+# sh_entsize: not used
+00 00 00 00 00 00 00 00
+

programs/return-42/06_section_header_string_table.txt

@@ -0,0 +1,29 @@
+# Section header table, section 2 -- string table
+
+# 0x0 = offset to the name of the section in the string table
+00 00 00 00
+
+# 3 = type: string table
+03 00 00 00
+
+# 0x0 = flags
+00 00 00 00 00 00 00 00
+
+# 0x0 = address in virtual memory (not used)
+00 00 00 00 00 00 00 00
+
+# 0xB0 = offset in the file of this section (start of string table)
+b0 00 00 00 00 00 00 00
+
+# 0x10 = size of this section in the file: 16 bytes
+10 00 00 00 00 00 00 00
+
+# sh_link -- not used for this section
+00 00 00 00 00 00 00 00
+
+# 0x01 = alignment code: default??
+01 00 00 00 00 00 00 00
+
+# sh_entsize: not used
+00 00 00 00 00 00 00 00
+