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Asked: 2026-05-10T16:45:07+00:00

My gcc build toolchain produces a .map file. How do I display the memory

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My gcc build toolchain produces a .map file. How do I display the memory sections using memory map graphically?

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  1. 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:

    Map

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