--- /dev/null
+#!/usr/bin/env python
+# Script to analyze code and arrange ld sections.
+#
+# Copyright (C) 2008-2014 Kevin O'Connor <kevin@koconnor.net>
+#
+# This file may be distributed under the terms of the GNU GPLv3 license.
+
+import operator
+import sys
+
+# LD script headers/trailers
+COMMONHEADER = """
+/* DO NOT EDIT! This is an autogenerated file. See scripts/layoutrom.py. */
+OUTPUT_FORMAT("elf32-i386")
+OUTPUT_ARCH("i386")
+SECTIONS
+{
+"""
+COMMONTRAILER = """
+
+ /* Discard regular data sections to force a link error if
+ * code attempts to access data not marked with VAR16 (or other
+ * appropriate macro)
+ */
+ /DISCARD/ : {
+ *(.text*) *(.data*) *(.bss*) *(.rodata*)
+ *(COMMON) *(.discard*) *(.eh_frame) *(.note*)
+ }
+}
+"""
+
+
+######################################################################
+# Determine section locations
+######################################################################
+
+# Align 'pos' to 'alignbytes' offset
+def alignpos(pos, alignbytes):
+ mask = alignbytes - 1
+ return (pos + mask) & ~mask
+
+# Determine the final addresses for a list of sections that end at an
+# address.
+def setSectionsStart(sections, endaddr, minalign=1, segoffset=0):
+ totspace = 0
+ for section in sections:
+ if section.align > minalign:
+ minalign = section.align
+ totspace = alignpos(totspace, section.align) + section.size
+ startaddr = int((endaddr - totspace) / minalign) * minalign
+ curaddr = startaddr
+ for section in sections:
+ curaddr = alignpos(curaddr, section.align)
+ section.finalloc = curaddr
+ section.finalsegloc = curaddr - segoffset
+ curaddr += section.size
+ return startaddr, minalign
+
+# The 16bit code can't exceed 64K of space.
+BUILD_BIOS_ADDR = 0xf0000
+BUILD_BIOS_SIZE = 0x10000
+BUILD_ROM_START = 0xc0000
+BUILD_LOWRAM_END = 0xa0000
+# Space to reserve in f-segment for dynamic allocations
+BUILD_MIN_BIOSTABLE = 2048
+
+# Layout the 16bit code. This ensures sections with fixed offset
+# requirements are placed in the correct location. It also places the
+# 16bit code as high as possible in the f-segment.
+def fitSections(sections, fillsections):
+ # fixedsections = [(addr, section), ...]
+ fixedsections = []
+ for section in sections:
+ if section.name.startswith('.fixedaddr.'):
+ addr = int(section.name[11:], 16)
+ section.finalloc = addr + BUILD_BIOS_ADDR
+ section.finalsegloc = addr
+ fixedsections.append((addr, section))
+ if section.align != 1:
+ print("Error: Fixed section %s has non-zero alignment (%d)" % (
+ section.name, section.align))
+ sys.exit(1)
+ fixedsections.sort(key=operator.itemgetter(0))
+ firstfixed = fixedsections[0][0]
+
+ # Find freespace in fixed address area
+ # fixedAddr = [(freespace, section), ...]
+ fixedAddr = []
+ for i in range(len(fixedsections)):
+ fixedsectioninfo = fixedsections[i]
+ addr, section = fixedsectioninfo
+ if i == len(fixedsections) - 1:
+ nextaddr = BUILD_BIOS_SIZE
+ else:
+ nextaddr = fixedsections[i+1][0]
+ avail = nextaddr - addr - section.size
+ fixedAddr.append((avail, section))
+ fixedAddr.sort(key=operator.itemgetter(0))
+
+ # Attempt to fit other sections into fixed area
+ canrelocate = [(section.size, section.align, section.name, section)
+ for section in fillsections]
+ canrelocate.sort()
+ canrelocate = [section for size, align, name, section in canrelocate]
+ totalused = 0
+ for freespace, fixedsection in fixedAddr:
+ addpos = fixedsection.finalsegloc + fixedsection.size
+ totalused += fixedsection.size
+ nextfixedaddr = addpos + freespace
+# print("Filling section %x uses %d, next=%x, available=%d" % (
+# fixedsection.finalloc, fixedsection.size, nextfixedaddr, freespace))
+ while 1:
+ canfit = None
+ for fitsection in canrelocate:
+ if addpos + fitsection.size > nextfixedaddr:
+ # Can't fit and nothing else will fit.
+ break
+ fitnextaddr = alignpos(addpos, fitsection.align) + fitsection.size
+# print("Test %s - %x vs %x" % (
+# fitsection.name, fitnextaddr, nextfixedaddr))
+ if fitnextaddr > nextfixedaddr:
+ # This item can't fit.
+ continue
+ canfit = (fitnextaddr, fitsection)
+ if canfit is None:
+ break
+ # Found a section that can fit.
+ fitnextaddr, fitsection = canfit
+ canrelocate.remove(fitsection)
+ fitsection.finalloc = addpos + BUILD_BIOS_ADDR
+ fitsection.finalsegloc = addpos
+ addpos = fitnextaddr
+ totalused += fitsection.size
+# print(" Adding %s (size %d align %d) pos=%x avail=%d" % (
+# fitsection[2], fitsection[0], fitsection[1]
+# , fitnextaddr, nextfixedaddr - fitnextaddr))
+
+ # Report stats
+ total = BUILD_BIOS_SIZE-firstfixed
+ slack = total - totalused
+ print ("Fixed space: 0x%x-0x%x total: %d slack: %d"
+ " Percent slack: %.1f%%" % (
+ firstfixed, BUILD_BIOS_SIZE, total, slack,
+ (float(slack) / total) * 100.0))
+
+ return firstfixed + BUILD_BIOS_ADDR
+
+# Return the subset of sections with a given category
+def getSectionsCategory(sections, category):
+ return [section for section in sections if section.category == category]
+
+# Return the subset of sections with a given fileid
+def getSectionsFileid(sections, fileid):
+ return [section for section in sections if section.fileid == fileid]
+
+# Return the subset of sections with a given name prefix
+def getSectionsPrefix(sections, prefix):
+ return [section for section in sections
+ if section.name.startswith(prefix)]
+
+# The sections (and associated information) to be placed in output rom
+class LayoutInfo:
+ sections = None
+ genreloc = None
+ sec32init_start = sec32init_end = sec32init_align = None
+ sec32low_start = sec32low_end = None
+ zonelow_base = final_sec32low_start = None
+ zonefseg_start = zonefseg_end = None
+ final_readonly_start = None
+ varlowsyms = entrysym = None
+
+# Determine final memory addresses for sections
+def doLayout(sections, config, genreloc):
+ li = LayoutInfo()
+ li.sections = sections
+ li.genreloc = genreloc
+ # Determine 16bit positions
+ sections16 = getSectionsCategory(sections, '16')
+ textsections = getSectionsPrefix(sections16, '.text.')
+ rodatasections = getSectionsPrefix(sections16, '.rodata')
+ datasections = getSectionsPrefix(sections16, '.data16.')
+ fixedsections = getSectionsCategory(sections, 'fixed')
+
+ firstfixed = fitSections(fixedsections, textsections)
+ remsections = [s for s in textsections+rodatasections+datasections
+ if s.finalloc is None]
+ sec16_start, sec16_align = setSectionsStart(
+ remsections, firstfixed, segoffset=BUILD_BIOS_ADDR)
+
+ # Determine 32seg positions
+ sections32seg = getSectionsCategory(sections, '32seg')
+ textsections = getSectionsPrefix(sections32seg, '.text.')
+ rodatasections = getSectionsPrefix(sections32seg, '.rodata')
+ datasections = getSectionsPrefix(sections32seg, '.data32seg.')
+
+ sec32seg_start, sec32seg_align = setSectionsStart(
+ textsections + rodatasections + datasections, sec16_start
+ , segoffset=BUILD_BIOS_ADDR)
+
+ # Determine 32bit "fseg memory" data positions
+ sections32textfseg = getSectionsCategory(sections, '32textfseg')
+ sec32textfseg_start, sec32textfseg_align = setSectionsStart(
+ sections32textfseg, sec32seg_start, 16)
+
+ sections32fseg = getSectionsCategory(sections, '32fseg')
+ sec32fseg_start, sec32fseg_align = setSectionsStart(
+ sections32fseg, sec32textfseg_start, 16
+ , segoffset=BUILD_BIOS_ADDR)
+
+ # Determine 32flat runtime positions
+ sections32flat = getSectionsCategory(sections, '32flat')
+ textsections = getSectionsPrefix(sections32flat, '.text.')
+ rodatasections = getSectionsPrefix(sections32flat, '.rodata')
+ datasections = getSectionsPrefix(sections32flat, '.data.')
+ bsssections = getSectionsPrefix(sections32flat, '.bss.')
+
+ sec32flat_start, sec32flat_align = setSectionsStart(
+ textsections + rodatasections + datasections + bsssections
+ , sec32fseg_start, 16)
+
+ # Determine 32flat init positions
+ sections32init = getSectionsCategory(sections, '32init')
+ init32_textsections = getSectionsPrefix(sections32init, '.text.')
+ init32_rodatasections = getSectionsPrefix(sections32init, '.rodata')
+ init32_datasections = getSectionsPrefix(sections32init, '.data.')
+ init32_bsssections = getSectionsPrefix(sections32init, '.bss.')
+
+ sec32init_start, sec32init_align = setSectionsStart(
+ init32_textsections + init32_rodatasections
+ + init32_datasections + init32_bsssections
+ , sec32flat_start, 16)
+
+ # Determine location of ZoneFSeg memory.
+ zonefseg_end = sec32flat_start
+ if not genreloc:
+ zonefseg_end = sec32init_start
+ zonefseg_start = BUILD_BIOS_ADDR
+ if zonefseg_start + BUILD_MIN_BIOSTABLE > zonefseg_end:
+ # Not enough ZoneFSeg space - force a minimum space.
+ zonefseg_end = sec32fseg_start
+ zonefseg_start = zonefseg_end - BUILD_MIN_BIOSTABLE
+ sec32flat_start, sec32flat_align = setSectionsStart(
+ textsections + rodatasections + datasections + bsssections
+ , zonefseg_start, 16)
+ sec32init_start, sec32init_align = setSectionsStart(
+ init32_textsections + init32_rodatasections
+ + init32_datasections + init32_bsssections
+ , sec32flat_start, 16)
+ li.sec32init_start = sec32init_start
+ li.sec32init_end = sec32flat_start
+ li.sec32init_align = sec32init_align
+ final_readonly_start = min(BUILD_BIOS_ADDR, sec32flat_start)
+ if not genreloc:
+ final_readonly_start = min(BUILD_BIOS_ADDR, sec32init_start)
+ li.zonefseg_start = zonefseg_start
+ li.zonefseg_end = zonefseg_end
+ li.final_readonly_start = final_readonly_start
+
+ # Determine "low memory" data positions
+ sections32low = getSectionsCategory(sections, '32low')
+ sec32low_end = sec32init_start
+ if config.get('CONFIG_MALLOC_UPPERMEMORY'):
+ final_sec32low_end = final_readonly_start
+ zonelow_base = final_sec32low_end - 64*1024
+ zonelow_base = max(BUILD_ROM_START, alignpos(zonelow_base, 2*1024))
+ else:
+ final_sec32low_end = BUILD_LOWRAM_END
+ zonelow_base = final_sec32low_end - 64*1024
+ relocdelta = final_sec32low_end - sec32low_end
+ li.sec32low_start, li.sec32low_align = setSectionsStart(
+ sections32low, sec32low_end, 16
+ , segoffset=zonelow_base - relocdelta)
+ li.sec32low_end = sec32low_end
+ li.zonelow_base = zonelow_base
+ li.final_sec32low_start = li.sec32low_start + relocdelta
+
+ # Print statistics
+ size16 = BUILD_BIOS_ADDR + BUILD_BIOS_SIZE - sec16_start
+ size32seg = sec16_start - sec32seg_start
+ size32textfseg = sec32seg_start - sec32textfseg_start
+ size32fseg = sec32textfseg_start - sec32fseg_start
+ size32flat = sec32fseg_start - sec32flat_start
+ size32init = sec32flat_start - sec32init_start
+ sizelow = li.sec32low_end - li.sec32low_start
+ print("16bit size: %d" % size16)
+ print("32bit segmented size: %d" % size32seg)
+ print("32bit flat size: %d" % (size32flat + size32textfseg))
+ print("32bit flat init size: %d" % size32init)
+ print("Lowmem size: %d" % sizelow)
+ print("f-segment var size: %d" % size32fseg)
+ return li
+
+
+######################################################################
+# Linker script output
+######################################################################
+
+# Write LD script includes for the given cross references
+def outXRefs(sections, useseg=0, exportsyms=[], forcedelta=0):
+ xrefs = dict([(symbol.name, symbol) for symbol in exportsyms])
+ out = ""
+ for section in sections:
+ for reloc in section.relocs:
+ symbol = reloc.symbol
+ if (symbol.section is not None
+ and (symbol.section.fileid != section.fileid
+ or symbol.name != reloc.symbolname)):
+ xrefs[reloc.symbolname] = symbol
+ for symbolname, symbol in xrefs.items():
+ loc = symbol.section.finalloc
+ if useseg:
+ loc = symbol.section.finalsegloc
+ out += "%s = 0x%x ;\n" % (symbolname, loc + forcedelta + symbol.offset)
+ return out
+
+# Write LD script includes for the given sections
+def outSections(sections, useseg=0):
+ out = ""
+ for section in sections:
+ loc = section.finalloc
+ if useseg:
+ loc = section.finalsegloc
+ out += "%s 0x%x : { *(%s) }\n" % (section.name, loc, section.name)
+ return out
+
+# Write LD script includes for the given sections using relative offsets
+def outRelSections(sections, startsym, useseg=0):
+ sections = [(section.finalloc, section) for section in sections
+ if section.finalloc is not None]
+ sections.sort(key=operator.itemgetter(0))
+ out = ""
+ for addr, section in sections:
+ loc = section.finalloc
+ if useseg:
+ loc = section.finalsegloc
+ out += ". = ( 0x%x - %s ) ;\n" % (loc, startsym)
+ if section.name in ('.rodata.str1.1', '.rodata'):
+ out += "_rodata%s = . ;\n" % (section.fileid,)
+ out += "*%s.*(%s)\n" % (section.fileid, section.name)
+ return out
+
+# Build linker script output for a list of relocations.
+def strRelocs(outname, outrel, relocs):
+ relocs.sort()
+ return (" %s_start = ABSOLUTE(.) ;\n" % (outname,)
+ + "".join(["LONG(0x%x - %s)\n" % (pos, outrel)
+ for pos in relocs])
+ + " %s_end = ABSOLUTE(.) ;\n" % (outname,))
+
+# Find relocations to the given sections
+def getRelocs(sections, tosection, type=None):
+ return [section.finalloc + reloc.offset
+ for section in sections
+ for reloc in section.relocs
+ if (reloc.symbol.section in tosection
+ and (type is None or reloc.type == type))]
+
+# Output the linker scripts for all required sections.
+def writeLinkerScripts(li, out16, out32seg, out32flat):
+ # Write 16bit linker script
+ filesections16 = getSectionsFileid(li.sections, '16')
+ out = outXRefs(filesections16, useseg=1) + """
+ zonelow_base = 0x%x ;
+ _zonelow_seg = 0x%x ;
+
+%s
+""" % (li.zonelow_base,
+ int(li.zonelow_base / 16),
+ outSections(filesections16, useseg=1))
+ outfile = open(out16, 'w')
+ outfile.write(COMMONHEADER + out + COMMONTRAILER)
+ outfile.close()
+
+ # Write 32seg linker script
+ filesections32seg = getSectionsFileid(li.sections, '32seg')
+ out = (outXRefs(filesections32seg, useseg=1)
+ + outSections(filesections32seg, useseg=1))
+ outfile = open(out32seg, 'w')
+ outfile.write(COMMONHEADER + out + COMMONTRAILER)
+ outfile.close()
+
+ # Write 32flat linker script
+ sec32all_start = li.sec32low_start
+ relocstr = ""
+ if li.genreloc:
+ # Generate relocations
+ initsections = dict([
+ (s, 1) for s in getSectionsCategory(li.sections, '32init')])
+ noninitsections = dict([(s, 1) for s in li.sections
+ if s not in initsections])
+ absrelocs = getRelocs(initsections, initsections, type='R_386_32')
+ relrelocs = getRelocs(initsections, noninitsections, type='R_386_PC32')
+ initrelocs = getRelocs(noninitsections, initsections)
+ relocstr = (strRelocs("_reloc_abs", "code32init_start", absrelocs)
+ + strRelocs("_reloc_rel", "code32init_start", relrelocs)
+ + strRelocs("_reloc_init", "code32flat_start", initrelocs))
+ numrelocs = len(absrelocs + relrelocs + initrelocs)
+ sec32all_start -= numrelocs * 4
+ filesections32flat = getSectionsFileid(li.sections, '32flat')
+ out = outXRefs([], exportsyms=li.varlowsyms
+ , forcedelta=li.final_sec32low_start-li.sec32low_start)
+ out += outXRefs(filesections32flat, exportsyms=[li.entrysym]) + """
+ _reloc_min_align = 0x%x ;
+ zonefseg_start = 0x%x ;
+ zonefseg_end = 0x%x ;
+ zonelow_base = 0x%x ;
+ final_varlow_start = 0x%x ;
+ final_readonly_start = 0x%x ;
+ varlow_start = 0x%x ;
+ varlow_end = 0x%x ;
+ code32init_start = 0x%x ;
+ code32init_end = 0x%x ;
+
+ code32flat_start = 0x%x ;
+ .text code32flat_start : {
+%s
+%s
+ code32flat_end = ABSOLUTE(.) ;
+ } :text
+""" % (li.sec32init_align,
+ li.zonefseg_start,
+ li.zonefseg_end,
+ li.zonelow_base,
+ li.final_sec32low_start,
+ li.final_readonly_start,
+ li.sec32low_start,
+ li.sec32low_end,
+ li.sec32init_start,
+ li.sec32init_end,
+ sec32all_start,
+ relocstr,
+ outRelSections(li.sections, 'code32flat_start'))
+ out = COMMONHEADER + out + COMMONTRAILER + """
+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()
Code Review / kvmfornfv.git / blobdiff