diff options
Diffstat (limited to 'tools/ldparser.py')
| -rw-r--r-- | tools/ldparser.py | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/tools/ldparser.py b/tools/ldparser.py new file mode 100644 index 0000000..c620fe2 --- /dev/null +++ b/tools/ldparser.py @@ -0,0 +1,126 @@ + +import sys + +import pyparsing as pp +from pyparsing import pyparsing_common as ppc + +LPAREN, RPAREN, LBRACE, RBRACE, LBROK, RBROK, COLON, SEMICOLON, EQUALS, COMMA = map(pp.Suppress, '(){}<>:;=,') + +parse_suffix_int = lambda lit: int(lit[:-1]) * (10**(3*(1 + 'kmgtpe'.find(lit[-1].lower())))) +si_suffix = pp.oneOf('k m g t p e', caseless=True) + +numeric_literal = pp.Regex('0x[0-9a-fA-F]+').setName('hex int').setParseAction(pp.tokenMap(int, 16)) \ + | (pp.Regex('[0-9]+[kKmMgGtTpPeE]')).setName('size int').setParseAction(pp.tokenMap(parse_suffix_int)) \ + | pp.Word(pp.nums).setName('int').setParseAction(pp.tokenMap(int)) +access_def = pp.Regex('[rR]?[wW]?[xX]?').setName('access literal').setParseAction(pp.tokenMap(str.lower)) + +origin_expr = pp.Suppress(pp.CaselessKeyword('ORIGIN')) + EQUALS + numeric_literal +length_expr = pp.Suppress(pp.CaselessKeyword('LENGTH')) + EQUALS + numeric_literal +mem_expr = pp.Group(ppc.identifier + LPAREN + access_def + RPAREN + COLON + origin_expr + COMMA + length_expr) +mem_contents = pp.ZeroOrMore(mem_expr) + +mem_toplevel = pp.CaselessKeyword("MEMORY") + pp.Group(LBRACE + pp.Optional(mem_contents, []) + RBRACE) + +glob = pp.Word(pp.alphanums + '._*') +match_expr = pp.Forward() +assignment = pp.Forward() +funccall = pp.Group(pp.Word(pp.alphas + '_') + LPAREN + (assignment | numeric_literal | match_expr | glob | ppc.identifier) + RPAREN + pp.Optional(SEMICOLON)) +value = numeric_literal | funccall | ppc.identifier | '.' +formula = (value + pp.oneOf('+ = * / %') + value) | value +# suppress stray semicolons +assignment << (SEMICOLON | pp.Group((ppc.identifier | '.') + EQUALS + (formula | value) + pp.Optional(SEMICOLON))) +match_expr << (glob + LPAREN + pp.OneOrMore(funccall | glob) + RPAREN) + +section_contents = pp.ZeroOrMore(assignment | funccall | match_expr); + +section_name = pp.Regex('\.[a-zA-Z0-9_.]+') +section_def = pp.Group(section_name + pp.Optional(numeric_literal) + COLON + LBRACE + pp.Group(section_contents) + + RBRACE + pp.Optional(RBROK + ppc.identifier + pp.Optional('AT' + RBROK + ppc.identifier))) +sec_contents = pp.ZeroOrMore(section_def | assignment) + +sections_toplevel = pp.Group(pp.CaselessKeyword("SECTIONS").suppress() + LBRACE + sec_contents + RBRACE) + +toplevel_elements = mem_toplevel | funccall | sections_toplevel | assignment +ldscript = pp.Group(pp.ZeroOrMore(toplevel_elements)) +ldscript.ignore(pp.cppStyleComment) + +if __name__ == '__main__': + import argparse + parser = argparse.ArgumentParser() + parser.add_argument('linker_script', type=argparse.FileType('r')) + args = parser.parse_args() + + #print(mem_expr.parseString('FLASH (rx) : ORIGIN = 0x0800000, LENGTH = 512K', parseAll=True)) + # print(ldscript.parseString(''' + # /* Entry Point */ + # ENTRY(Reset_Handler) + # + # /* Highest address of the user mode stack */ + # _estack = 0x20020000; /* end of RAM */ + # /* Generate a link error if heap and stack don't fit into RAM */ + # _Min_Heap_Size = 0x200;; /* required amount of heap */ + # _Min_Stack_Size = 0x400;; /* required amount of stack */ + # ''', parseAll=True)) + + print(ldscript.parseFile(args.linker_script, parseAll=True)) + #print(funccall.parseString('KEEP(*(.isr_vector))')) + #print(section_contents.parseString(''' + # . = ALIGN(4); + # KEEP(*(.isr_vector)) /* Startup code */ + # . = ALIGN(4); + # ''', parseAll=True)) + + #print(section_def.parseString(''' + # .text : + # { + # . = ALIGN(4); + # *(.text) /* .text sections (code) */ + # *(.text*) /* .text* sections (code) */ + # *(.glue_7) /* glue arm to thumb code */ + # *(.glue_7t) /* glue thumb to arm code */ + # *(.eh_frame) + # + # KEEP (*(.init)) + # KEEP (*(.fini)) + # + # . = ALIGN(4); + # _etext = .; /* define a global symbols at end of code */ + # } >FLASH + # ''', parseAll=True)) + + #print(section_def.parseString('.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH', parseAll=True)) + + #print(assignment.parseString('__preinit_array_start = .', parseAll=True)) + #print(assignment.parseString('a = 23', parseAll=True)) + #print(funccall.parseString('foo (a=23)', parseAll=True)) + #print(funccall.parseString('PROVIDE_HIDDEN (__preinit_array_start = .);', parseAll=True)) + #print(section_def.parseString(''' + # .preinit_array : + # { + # PROVIDE_HIDDEN (__preinit_array_start = .); + # KEEP (*(.preinit_array*)) + # PROVIDE_HIDDEN (__preinit_array_end = .); + # } >FLASH''', parseAll=True)) + #print(match_expr.parseString('*(SORT(.init_array.*))', parseAll=True)) + #print(funccall.parseString('KEEP (*(SORT(.init_array.*)))', parseAll=True)) + #print(section_def.parseString(''' + # .init_array : + # { + # PROVIDE_HIDDEN (__init_array_start = .); + # KEEP (*(SORT(.init_array.*))) + # KEEP (*(.init_array*)) + # PROVIDE_HIDDEN (__init_array_end = .); + # } >FLASH + # ''', parseAll=True)) + + #print(match_expr.parseString('*(.ARM.extab* .gnu.linkonce.armextab.*)', parseAll=True)) + #print(formula.parseString('. + _Min_Heap_Size', parseAll=True)) + #print(assignment.parseString('. = . + _Min_Heap_Size;', parseAll=True)) + #print(sections_toplevel.parseString(''' + # SECTIONS + # { + # .ARMattributes : { } + # } + # ''', parseAll=True)) + #sys.exit(0) + |