Menu
My gcc build toolchain produces a .map file. How do I display the memory map graphically?
555
Advertisements. The mmap() system call provides mapping in the virtual address space of the calling process that maps the files or devices into memory. This is of two types − File mapping or File-backed mapping − This mapping maps the area of the process' virtual memory to the files.
Here's the beginnings of a script in Python. It loads the map file into a list of Sections and Symbols (first half). It then renders the map using HTML (or do whatever you want with the sections and symbols lists).
You can control the script by modifying these lines:
with open('t.map') as f: colors = ['9C9F84', 'A97D5D', 'F7DCB4', '5C755E'] total_height = 32.0 map2html.py
from __future__ import with_statement import re class Section: def __init__(self, address, size, segment, section): self.address = address self.size = size self.segment = segment self.section = section def __str__(self): return self.section+"" class Symbol: def __init__(self, address, size, file, name): self.address = address self.size = size self.file = file self.name = name def __str__(self): return self.name #=============================== # Load the Sections and Symbols # sections = [] symbols = [] with open('t.map') as f: in_sections = True for line in f: m = re.search('^([0-9A-Fx]+)\s+([0-9A-Fx]+)\s+((\[[ 0-9]+\])|\w+)\s+(.*?)\s*$', line) if m: if in_sections: sections.append(Section(eval(m.group(1)), eval(m.group(2)), m.group(3), m.group(5))) else: symbols.append(Symbol(eval(m.group(1)), eval(m.group(2)), m.group(3), m.group(5))) else: if len(sections) > 0: in_sections = False #=============================== # Gererate the HTML File # colors = ['9C9F84', 'A97D5D', 'F7DCB4', '5C755E'] total_height = 32.0 segments = set() for s in sections: segments.add(s.segment) segment_colors = dict() i = 0 for s in segments: segment_colors[s] = colors[i % len(colors)] i += 1 total_size = 0 for s in symbols: total_size += s.size sections.sort(lambda a,b: a.address - b.address) symbols.sort(lambda a,b: a.address - b.address) def section_from_address(addr): for s in sections: if addr >= s.address and addr < (s.address + s.size): return s return None print "<html><head>" print " <style>a { color: black; text-decoration: none; font-family:monospace }</style>" print "<body>" print "<table cellspacing='1px'>" for sym in symbols: section = section_from_address(sym.address) height = (total_height/total_size) * sym.size font_size = 1.0 if height > 1.0 else height print "<tr style='background-color:#%s;height:%gem;line-height:%gem;font-size:%gem'><td style='overflow:hidden'>" % \ (segment_colors[section.segment], height, height, font_size) print "<a href='#%s'>%s</a>" % (sym.name, sym.name) print "</td></tr>" print "</table>" print "</body></html>" And here's a bad rendering of the HTML it outputs:
101
I've written a C# program to display the information in a Map file along with information not usually present in the map file (like static symbols provided you can use binutils). The code is available here. In short it parses the map file and also uses BINUTILS (if available) to gather more information. To run it you need to download the code and run the project under visual studio, browse to the map file path and click Analyze.
Note: Only works for GCC/LD map files
Screenshot: [![3]](https://i.stack.imgur.com/W9uZ9.png)
25
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
