705 lines
26 KiB
Python
705 lines
26 KiB
Python
#!/usr/bin/env python
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# Script to analyze code and arrange ld sections.
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#
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# Copyright (C) 2008-2014 Kevin O'Connor <kevin@koconnor.net>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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import operator
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import sys
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# LD script headers/trailers
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COMMONHEADER = """
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/* DO NOT EDIT! This is an autogenerated file. See scripts/layoutrom.py. */
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OUTPUT_FORMAT("elf32-i386")
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OUTPUT_ARCH("i386")
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SECTIONS
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{
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"""
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COMMONTRAILER = """
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/* Discard regular data sections to force a link error if
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* code attempts to access data not marked with VAR16 (or other
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* appropriate macro)
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*/
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/DISCARD/ : {
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*(.text*) *(.data*) *(.bss*) *(.rodata*)
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*(COMMON) *(.discard*) *(.eh_frame) *(.note*)
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}
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}
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"""
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######################################################################
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# Determine section locations
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######################################################################
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# Align 'pos' up to 'alignbytes' offset
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def alignpos(pos, alignbytes):
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mask = alignbytes - 1
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return (pos + mask) & ~mask
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# Align 'pos' down to 'alignbytes' offset
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def aligndown(pos, alignbytes):
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mask = alignbytes - 1
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return pos & ~mask
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# Determine the final addresses for a list of sections that end at an
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# address.
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def setSectionsStart(sections, endaddr, minalign=1, segoffset=0):
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totspace = 0
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for section in sections:
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minalign = max(minalign, section.align)
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totspace = alignpos(totspace, section.align) + section.size
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startaddr = int((endaddr - totspace) / minalign) * minalign
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curaddr = startaddr
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for section in sections:
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curaddr = alignpos(curaddr, section.align)
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section.finalloc = curaddr
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section.finalsegloc = curaddr - segoffset
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curaddr += section.size
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return startaddr, minalign
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# The 16bit code can't exceed 64K of space.
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BUILD_BIOS_ADDR = 0xf0000
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BUILD_BIOS_SIZE = 0x10000
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BUILD_ROM_START = 0xc0000
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BUILD_LOWRAM_END = 0xa0000
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# Space to reserve in f-segment for dynamic allocations
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BUILD_MIN_BIOSTABLE = 2048
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# Layout the 16bit code. This ensures sections with fixed offset
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# requirements are placed in the correct location. It also places the
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# 16bit code as high as possible in the f-segment.
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def fitSections(sections, fillsections):
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# fixedsections = [(addr, section), ...]
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fixedsections = []
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for section in sections:
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if section.name.startswith('.fixedaddr.'):
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addr = int(section.name[11:], 16)
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section.finalloc = addr + BUILD_BIOS_ADDR
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section.finalsegloc = addr
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fixedsections.append((addr, section))
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if section.align != 1:
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print("Error: Fixed section %s has non-zero alignment (%d)" % (
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section.name, section.align))
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sys.exit(1)
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fixedsections.sort(key=operator.itemgetter(0))
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firstfixed = fixedsections[0][0]
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# Find freespace in fixed address area
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# fixedAddr = [(freespace, section), ...]
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fixedAddr = []
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for i in range(len(fixedsections)):
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fixedsectioninfo = fixedsections[i]
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addr, section = fixedsectioninfo
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if i == len(fixedsections) - 1:
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nextaddr = BUILD_BIOS_SIZE
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else:
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nextaddr = fixedsections[i+1][0]
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avail = nextaddr - addr - section.size
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fixedAddr.append((avail, section))
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fixedAddr.sort(key=operator.itemgetter(0))
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# Attempt to fit other sections into fixed area
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canrelocate = [(section.size, section.align, section.name, section)
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for section in fillsections]
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canrelocate.sort()
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canrelocate = [section for size, align, name, section in canrelocate]
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totalused = 0
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for freespace, fixedsection in fixedAddr:
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addpos = fixedsection.finalsegloc + fixedsection.size
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totalused += fixedsection.size
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nextfixedaddr = addpos + freespace
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# print("Filling section %x uses %d, next=%x, available=%d" % (
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# fixedsection.finalloc, fixedsection.size, nextfixedaddr, freespace))
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while 1:
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canfit = None
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for fitsection in canrelocate:
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if addpos + fitsection.size > nextfixedaddr:
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# Can't fit and nothing else will fit.
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break
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fitnextaddr = alignpos(addpos, fitsection.align) + fitsection.size
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# print("Test %s - %x vs %x" % (
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# fitsection.name, fitnextaddr, nextfixedaddr))
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if fitnextaddr > nextfixedaddr:
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# This item can't fit.
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continue
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canfit = (fitnextaddr, fitsection)
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if canfit is None:
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break
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# Found a section that can fit.
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fitnextaddr, fitsection = canfit
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canrelocate.remove(fitsection)
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fitsection.finalloc = addpos + BUILD_BIOS_ADDR
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fitsection.finalsegloc = addpos
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addpos = fitnextaddr
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totalused += fitsection.size
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# print(" Adding %s (size %d align %d) pos=%x avail=%d" % (
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# fitsection[2], fitsection[0], fitsection[1]
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# , fitnextaddr, nextfixedaddr - fitnextaddr))
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# Report stats
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total = BUILD_BIOS_SIZE-firstfixed
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slack = total - totalused
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print ("Fixed space: 0x%x-0x%x total: %d slack: %d"
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" Percent slack: %.1f%%" % (
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firstfixed, BUILD_BIOS_SIZE, total, slack,
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(float(slack) / total) * 100.0))
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return firstfixed + BUILD_BIOS_ADDR
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# Return the subset of sections with a given category
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def getSectionsCategory(sections, category):
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return [section for section in sections if section.category == category]
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# Return the subset of sections with a given fileid
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def getSectionsFileid(sections, fileid):
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return [section for section in sections if section.fileid == fileid]
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# Return the subset of sections with a given name prefix
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def getSectionsPrefix(sections, prefix):
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return [section for section in sections
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if section.name.startswith(prefix)]
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# The sections (and associated information) to be placed in output rom
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class LayoutInfo:
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sections = None
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config = None
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genreloc = None
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sec32init_start = sec32init_end = sec32init_align = None
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sec32low_start = sec32low_end = None
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zonelow_base = final_sec32low_start = None
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zonefseg_start = zonefseg_end = None
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final_readonly_start = None
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varlowsyms = entrysym = None
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# Determine final memory addresses for sections
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def doLayout(sections, config, genreloc):
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li = LayoutInfo()
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li.config = config
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li.sections = sections
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li.genreloc = genreloc
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# Determine 16bit positions
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sections16 = getSectionsCategory(sections, '16')
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textsections = getSectionsPrefix(sections16, '.text.')
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rodatasections = getSectionsPrefix(sections16, '.rodata')
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datasections = getSectionsPrefix(sections16, '.data16.')
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fixedsections = getSectionsCategory(sections, 'fixed')
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firstfixed = fitSections(fixedsections, textsections)
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remsections = [s for s in textsections+rodatasections+datasections
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if s.finalloc is None]
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sec16_start, sec16_align = setSectionsStart(
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remsections, firstfixed, segoffset=BUILD_BIOS_ADDR)
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# Determine 32seg positions
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sections32seg = getSectionsCategory(sections, '32seg')
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textsections = getSectionsPrefix(sections32seg, '.text.')
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rodatasections = getSectionsPrefix(sections32seg, '.rodata')
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datasections = getSectionsPrefix(sections32seg, '.data32seg.')
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sec32seg_start, sec32seg_align = setSectionsStart(
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textsections + rodatasections + datasections, sec16_start
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, segoffset=BUILD_BIOS_ADDR)
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# Determine 32bit "fseg memory" data positions
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sections32textfseg = getSectionsCategory(sections, '32textfseg')
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sec32textfseg_start, sec32textfseg_align = setSectionsStart(
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sections32textfseg, sec32seg_start, 16)
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sections32fseg = getSectionsCategory(sections, '32fseg')
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sec32fseg_start, sec32fseg_align = setSectionsStart(
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sections32fseg, sec32textfseg_start, 16
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, segoffset=BUILD_BIOS_ADDR)
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# Determine 32flat runtime positions
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sections32flat = getSectionsCategory(sections, '32flat')
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textsections = getSectionsPrefix(sections32flat, '.text.')
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rodatasections = getSectionsPrefix(sections32flat, '.rodata')
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datasections = getSectionsPrefix(sections32flat, '.data.')
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bsssections = getSectionsPrefix(sections32flat, '.bss.')
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sec32flat_start, sec32flat_align = setSectionsStart(
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textsections + rodatasections + datasections + bsssections
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, sec32fseg_start, 16)
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# Determine 32flat init positions
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sections32init = getSectionsCategory(sections, '32init')
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init32_textsections = getSectionsPrefix(sections32init, '.text.')
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init32_rodatasections = getSectionsPrefix(sections32init, '.rodata')
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init32_datasections = getSectionsPrefix(sections32init, '.data.')
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init32_bsssections = getSectionsPrefix(sections32init, '.bss.')
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sec32init_start, sec32init_align = setSectionsStart(
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init32_textsections + init32_rodatasections
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+ init32_datasections + init32_bsssections
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, sec32flat_start, 16)
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# Determine location of ZoneFSeg memory.
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zonefseg_end = sec32flat_start
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if not genreloc:
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zonefseg_end = sec32init_start
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zonefseg_start = BUILD_BIOS_ADDR
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if zonefseg_start + BUILD_MIN_BIOSTABLE > zonefseg_end:
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# Not enough ZoneFSeg space - force a minimum space.
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zonefseg_end = sec32fseg_start
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zonefseg_start = zonefseg_end - BUILD_MIN_BIOSTABLE
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sec32flat_start, sec32flat_align = setSectionsStart(
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textsections + rodatasections + datasections + bsssections
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, zonefseg_start, 16)
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sec32init_start, sec32init_align = setSectionsStart(
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init32_textsections + init32_rodatasections
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+ init32_datasections + init32_bsssections
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, sec32flat_start, 16)
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li.sec32init_start = sec32init_start
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li.sec32init_end = sec32flat_start
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li.sec32init_align = sec32init_align
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final_readonly_start = min(BUILD_BIOS_ADDR, sec32flat_start)
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if not genreloc:
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final_readonly_start = min(BUILD_BIOS_ADDR, sec32init_start)
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li.zonefseg_start = zonefseg_start
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li.zonefseg_end = zonefseg_end
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li.final_readonly_start = final_readonly_start
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# Determine "low memory" data positions
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sections32low = getSectionsCategory(sections, '32low')
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sec32low_end = sec32init_start
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if config.get('CONFIG_MALLOC_UPPERMEMORY'):
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final_sec32low_end = final_readonly_start
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zonelow_base = final_sec32low_end - 64*1024
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zonelow_base = max(BUILD_ROM_START, alignpos(zonelow_base, 2*1024))
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else:
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final_sec32low_end = BUILD_LOWRAM_END
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zonelow_base = final_sec32low_end - 64*1024
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relocdelta = final_sec32low_end - sec32low_end
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li.sec32low_start, sec32low_align = setSectionsStart(
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sections32low, sec32low_end, 16
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, segoffset=zonelow_base - relocdelta)
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li.sec32low_end = sec32low_end
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li.zonelow_base = zonelow_base
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li.final_sec32low_start = li.sec32low_start + relocdelta
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# Print statistics
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size16 = BUILD_BIOS_ADDR + BUILD_BIOS_SIZE - sec16_start
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size32seg = sec16_start - sec32seg_start
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size32textfseg = sec32seg_start - sec32textfseg_start
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size32fseg = sec32textfseg_start - sec32fseg_start
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size32flat = sec32fseg_start - sec32flat_start
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size32init = sec32flat_start - sec32init_start
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sizelow = li.sec32low_end - li.sec32low_start
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print("16bit size: %d" % size16)
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print("32bit segmented size: %d" % size32seg)
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print("32bit flat size: %d" % (size32flat + size32textfseg))
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print("32bit flat init size: %d" % size32init)
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print("Lowmem size: %d" % sizelow)
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print("f-segment var size: %d" % size32fseg)
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return li
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######################################################################
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# Linker script output
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######################################################################
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# Write LD script includes for the given cross references
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def outXRefs(sections, useseg=0, exportsyms=[], forcedelta=0):
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xrefs = dict([(symbol.name, symbol) for symbol in exportsyms])
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out = ""
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for section in sections:
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for reloc in section.relocs:
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symbol = reloc.symbol
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if (symbol.section is not None
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and (symbol.section.fileid != section.fileid
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or symbol.name != reloc.symbolname)):
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xrefs[reloc.symbolname] = symbol
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for symbolname, symbol in xrefs.items():
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loc = symbol.section.finalloc
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if useseg:
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loc = symbol.section.finalsegloc
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out += "%s = 0x%x ;\n" % (symbolname, loc + forcedelta + symbol.offset)
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return out
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# Write LD script includes for the given sections
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def outSections(sections, useseg=0):
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out = ""
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for section in sections:
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loc = section.finalloc
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if useseg:
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loc = section.finalsegloc
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out += "%s 0x%x : { *(%s) }\n" % (section.name, loc, section.name)
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return out
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# Write LD script includes for the given sections using relative offsets
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def outRelSections(sections, startsym, useseg=0):
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sections = [(section.finalloc, section) for section in sections
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if section.finalloc is not None]
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sections.sort(key=operator.itemgetter(0))
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out = ""
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for addr, section in sections:
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loc = section.finalloc
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if useseg:
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loc = section.finalsegloc
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out += ". = ( 0x%x - %s ) ;\n" % (loc, startsym)
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if section.name in ('.rodata.str1.1', '.rodata'):
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out += "_rodata%s = . ;\n" % (section.fileid,)
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out += "*%s.*(%s)\n" % (section.fileid, section.name)
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return out
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# Build linker script output for a list of relocations.
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def strRelocs(outname, outrel, relocs):
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relocs.sort()
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return (" %s_start = ABSOLUTE(.) ;\n" % (outname,)
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+ "".join(["LONG(0x%x - %s)\n" % (pos, outrel)
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for pos in relocs])
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+ " %s_end = ABSOLUTE(.) ;\n" % (outname,))
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# Find relocations to the given sections
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def getRelocs(sections, tosection, type=None):
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return [section.finalloc + reloc.offset
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for section in sections
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for reloc in section.relocs
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if (reloc.symbol.section in tosection
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and (type is None or reloc.type == type))]
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# Output the linker scripts for all required sections.
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def writeLinkerScripts(li, out16, out32seg, out32flat):
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# Write 16bit linker script
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filesections16 = getSectionsFileid(li.sections, '16')
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out = outXRefs(filesections16, useseg=1) + """
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zonelow_base = 0x%x ;
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_zonelow_seg = 0x%x ;
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%s
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""" % (li.zonelow_base,
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int(li.zonelow_base / 16),
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outSections(filesections16, useseg=1))
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outfile = open(out16, 'w')
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outfile.write(COMMONHEADER + out + COMMONTRAILER)
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outfile.close()
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# Write 32seg linker script
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filesections32seg = getSectionsFileid(li.sections, '32seg')
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out = (outXRefs(filesections32seg, useseg=1)
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+ outSections(filesections32seg, useseg=1))
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outfile = open(out32seg, 'w')
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outfile.write(COMMONHEADER + out + COMMONTRAILER)
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outfile.close()
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# Write 32flat linker script
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sec32all_start = li.sec32low_start
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relocstr = ""
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if li.genreloc:
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# Generate relocations
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initsections = dict([
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(s, 1) for s in getSectionsCategory(li.sections, '32init')])
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noninitsections = dict([(s, 1) for s in li.sections
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if s not in initsections])
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absrelocs = getRelocs(initsections, initsections, type='R_386_32')
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relrelocs = getRelocs(initsections, noninitsections, type='R_386_PC32')
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initrelocs = getRelocs(noninitsections, initsections)
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relocstr = (strRelocs("_reloc_abs", "code32init_start", absrelocs)
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+ strRelocs("_reloc_rel", "code32init_start", relrelocs)
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+ strRelocs("_reloc_init", "code32flat_start", initrelocs))
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numrelocs = len(absrelocs + relrelocs + initrelocs)
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sec32all_start -= numrelocs * 4
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filesections32flat = getSectionsFileid(li.sections, '32flat')
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out = outXRefs([], exportsyms=li.varlowsyms
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, forcedelta=li.final_sec32low_start-li.sec32low_start)
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multiboot_header = ""
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if li.config.get('CONFIG_MULTIBOOT'):
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multiboot_header = "LONG(0x1BADB002) LONG(0) LONG(-0x1BADB002)"
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sec32all_start -= 3 * 4
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sec32all_align = max([section.align for section in li.sections])
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sec32all_start = aligndown(sec32all_start, sec32all_align)
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out += outXRefs(filesections32flat, exportsyms=[li.entrysym]) + """
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_reloc_min_align = 0x%x ;
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zonefseg_start = 0x%x ;
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zonefseg_end = 0x%x ;
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zonelow_base = 0x%x ;
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final_varlow_start = 0x%x ;
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final_readonly_start = 0x%x ;
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varlow_start = 0x%x ;
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varlow_end = 0x%x ;
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code32init_start = 0x%x ;
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code32init_end = 0x%x ;
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code32flat_start = 0x%x ;
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.text code32flat_start : {
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%s
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%s
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%s
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code32flat_end = ABSOLUTE(.) ;
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} :text
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""" % (li.sec32init_align,
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li.zonefseg_start,
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li.zonefseg_end,
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li.zonelow_base,
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li.final_sec32low_start,
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li.final_readonly_start,
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li.sec32low_start,
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li.sec32low_end,
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li.sec32init_start,
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li.sec32init_end,
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sec32all_start,
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multiboot_header,
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relocstr,
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outRelSections(li.sections, 'code32flat_start'))
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out = COMMONHEADER + out + COMMONTRAILER + """
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ENTRY(%s)
|
|
PHDRS
|
|
{
|
|
text PT_LOAD AT ( code32flat_start ) ;
|
|
}
|
|
""" % (li.entrysym.name,)
|
|
outfile = open(out32flat, 'w')
|
|
outfile.write(out)
|
|
outfile.close()
|
|
|
|
|
|
######################################################################
|
|
# Detection of unused sections and init sections
|
|
######################################################################
|
|
|
|
# Visit all sections reachable from a given set of start sections
|
|
def findReachable(anchorsections, checkreloc, data):
|
|
anchorsections = dict([(section, []) for section in anchorsections])
|
|
pending = list(anchorsections)
|
|
while pending:
|
|
section = pending.pop()
|
|
for reloc in section.relocs:
|
|
chain = anchorsections[section] + [section.name]
|
|
if not checkreloc(reloc, section, data, chain):
|
|
continue
|
|
nextsection = reloc.symbol.section
|
|
if nextsection not in anchorsections:
|
|
anchorsections[nextsection] = chain
|
|
pending.append(nextsection)
|
|
return anchorsections
|
|
|
|
# Find "runtime" sections (ie, not init only sections).
|
|
def checkRuntime(reloc, rsection, data, chain):
|
|
section = reloc.symbol.section
|
|
if section is None or '.init.' in section.name:
|
|
return 0
|
|
if '.data.varinit.' in section.name:
|
|
print("ERROR: %s is VARVERIFY32INIT but used from %s" % (
|
|
section.name, chain))
|
|
sys.exit(1)
|
|
return 1
|
|
|
|
# Find and keep the section associated with a symbol (if available).
|
|
def checkKeepSym(reloc, syms, fileid, isxref):
|
|
symbolname = reloc.symbolname
|
|
mustbecfunc = symbolname.startswith('_cfunc')
|
|
if mustbecfunc:
|
|
symprefix = '_cfunc' + fileid + '_'
|
|
if not symbolname.startswith(symprefix):
|
|
return 0
|
|
symbolname = symbolname[len(symprefix):]
|
|
symbol = syms.get(symbolname)
|
|
if (symbol is None or symbol.section is None
|
|
or symbol.section.name.startswith('.discard.')):
|
|
return 0
|
|
isdestcfunc = (symbol.section.name.startswith('.text.')
|
|
and not symbol.section.name.startswith('.text.asm.'))
|
|
if ((mustbecfunc and not isdestcfunc)
|
|
or (not mustbecfunc and isdestcfunc and isxref)):
|
|
return 0
|
|
|
|
reloc.symbol = symbol
|
|
return 1
|
|
|
|
# Resolve a relocation and check if it should be kept in the final binary.
|
|
def checkKeep(reloc, section, symbols, chain):
|
|
ret = checkKeepSym(reloc, symbols[section.fileid], section.fileid, 0)
|
|
if ret:
|
|
return ret
|
|
# Not in primary sections - it may be a cross 16/32 reference
|
|
for fileid in ('16', '32seg', '32flat'):
|
|
if fileid != section.fileid:
|
|
ret = checkKeepSym(reloc, symbols[fileid], fileid, 1)
|
|
if ret:
|
|
return ret
|
|
return 0
|
|
|
|
|
|
######################################################################
|
|
# Startup and input parsing
|
|
######################################################################
|
|
|
|
class Section:
|
|
name = size = alignment = fileid = relocs = None
|
|
finalloc = finalsegloc = category = None
|
|
class Reloc:
|
|
offset = type = symbolname = symbol = None
|
|
class Symbol:
|
|
name = offset = section = None
|
|
|
|
# Read in output from objdump
|
|
def parseObjDump(file, fileid):
|
|
# sections = [section, ...]
|
|
sections = []
|
|
sectionmap = {}
|
|
# symbols[symbolname] = symbol
|
|
symbols = {}
|
|
|
|
state = None
|
|
for line in file.readlines():
|
|
line = line.rstrip()
|
|
if line == 'Sections:':
|
|
state = 'section'
|
|
continue
|
|
if line == 'SYMBOL TABLE:':
|
|
state = 'symbol'
|
|
continue
|
|
if line.startswith('RELOCATION RECORDS FOR ['):
|
|
sectionname = line[24:-2]
|
|
if sectionname.startswith('.debug_'):
|
|
# Skip debugging sections (to reduce parsing time)
|
|
state = None
|
|
continue
|
|
state = 'reloc'
|
|
relocsection = sectionmap[sectionname]
|
|
continue
|
|
|
|
if state == 'section':
|
|
try:
|
|
idx, name, size, vma, lma, fileoff, align = line.split()
|
|
if align[:3] != '2**':
|
|
continue
|
|
section = Section()
|
|
section.name = name
|
|
section.size = int(size, 16)
|
|
section.align = 2**int(align[3:])
|
|
section.fileid = fileid
|
|
section.relocs = []
|
|
sections.append(section)
|
|
sectionmap[name] = section
|
|
except ValueError:
|
|
pass
|
|
continue
|
|
if state == 'symbol':
|
|
try:
|
|
parts = line[17:].split()
|
|
if len(parts) == 3:
|
|
sectionname, size, name = parts
|
|
elif len(parts) == 4 and parts[2] == '.hidden':
|
|
sectionname, size, hidden, name = parts
|
|
else:
|
|
continue
|
|
symbol = Symbol()
|
|
symbol.size = int(size, 16)
|
|
symbol.offset = int(line[:8], 16)
|
|
symbol.name = name
|
|
symbol.section = sectionmap.get(sectionname)
|
|
symbols[name] = symbol
|
|
except ValueError:
|
|
pass
|
|
continue
|
|
if state == 'reloc':
|
|
try:
|
|
off, type, symbolname = line.split()
|
|
reloc = Reloc()
|
|
reloc.offset = int(off, 16)
|
|
reloc.type = type
|
|
reloc.symbolname = symbolname
|
|
reloc.symbol = symbols.get(symbolname)
|
|
if reloc.symbol is None:
|
|
# Some binutils (2.20.1) give section name instead
|
|
# of a symbol - create a dummy symbol.
|
|
reloc.symbol = symbol = Symbol()
|
|
symbol.size = 0
|
|
symbol.offset = 0
|
|
symbol.name = symbolname
|
|
symbol.section = sectionmap.get(symbolname)
|
|
symbols[symbolname] = symbol
|
|
relocsection.relocs.append(reloc)
|
|
except ValueError:
|
|
pass
|
|
return sections, symbols
|
|
|
|
# Parser for constants in simple C header files.
|
|
def scanconfig(file):
|
|
f = open(file, 'r')
|
|
opts = {}
|
|
for l in f.readlines():
|
|
parts = l.split()
|
|
if len(parts) != 3:
|
|
continue
|
|
if parts[0] != '#define':
|
|
continue
|
|
value = parts[2]
|
|
if value.isdigit() or (value.startswith('0x') and value[2:].isdigit()):
|
|
value = int(value, 0)
|
|
opts[parts[1]] = value
|
|
return opts
|
|
|
|
def main():
|
|
# Get output name
|
|
in16, in32seg, in32flat, cfgfile, out16, out32seg, out32flat = sys.argv[1:]
|
|
|
|
# Read in the objdump information
|
|
infile16 = open(in16, 'r')
|
|
infile32seg = open(in32seg, 'r')
|
|
infile32flat = open(in32flat, 'r')
|
|
|
|
# infoX = (sections, symbols)
|
|
info16 = parseObjDump(infile16, '16')
|
|
info32seg = parseObjDump(infile32seg, '32seg')
|
|
info32flat = parseObjDump(infile32flat, '32flat')
|
|
|
|
# Read kconfig config file
|
|
config = scanconfig(cfgfile)
|
|
|
|
# Figure out which sections to keep.
|
|
allsections = info16[0] + info32seg[0] + info32flat[0]
|
|
symbols = {'16': info16[1], '32seg': info32seg[1], '32flat': info32flat[1]}
|
|
if config.get('CONFIG_COREBOOT'):
|
|
entrysym = symbols['16'].get('entry_elf')
|
|
elif config.get('CONFIG_CSM'):
|
|
entrysym = symbols['16'].get('entry_csm')
|
|
else:
|
|
entrysym = symbols['16'].get('reset_vector')
|
|
anchorsections = [entrysym.section] + [
|
|
section for section in allsections
|
|
if section.name.startswith('.fixedaddr.')]
|
|
keepsections = findReachable(anchorsections, checkKeep, symbols)
|
|
sections = [section for section in allsections if section in keepsections]
|
|
|
|
# Separate 32bit flat into runtime, init, and special variable parts
|
|
anchorsections = [
|
|
section for section in sections
|
|
if ('.data.varlow.' in section.name or '.data.varfseg.' in section.name
|
|
or '.fixedaddr.' in section.name or '.runtime.' in section.name)]
|
|
runtimesections = findReachable(anchorsections, checkRuntime, None)
|
|
for section in sections:
|
|
if section.name.startswith('.data.varlow.'):
|
|
section.category = '32low'
|
|
elif section.name.startswith('.data.varfseg.'):
|
|
section.category = '32fseg'
|
|
elif section.name.startswith('.text.32fseg.'):
|
|
section.category = '32textfseg'
|
|
elif section.name.startswith('.fixedaddr.'):
|
|
section.category = 'fixed'
|
|
elif section.fileid == '32flat' and section not in runtimesections:
|
|
section.category = '32init'
|
|
else:
|
|
section.category = section.fileid
|
|
|
|
# Determine the final memory locations of each kept section.
|
|
genreloc = '_reloc_abs_start' in symbols['32flat']
|
|
li = doLayout(sections, config, genreloc)
|
|
|
|
# Exported symbols
|
|
li.varlowsyms = [symbol for symbol in symbols['32flat'].values()
|
|
if (symbol.section is not None
|
|
and symbol.section.finalloc is not None
|
|
and '.data.varlow.' in symbol.section.name
|
|
and symbol.name != symbol.section.name)]
|
|
li.entrysym = entrysym
|
|
|
|
# Write out linker script files.
|
|
writeLinkerScripts(li, out16, out32seg, out32flat)
|
|
|
|
if __name__ == '__main__':
|
|
main()
|