plgh/tree-sitter-linkerscript.ebnf at main · mingodad/plgh · GitHub

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//
// From tree-sitter-linkerscript/src/grammar.json
//
//
// EBNF to generate railroad diagram at
//      (IPV6) https://www.bottlecaps.de/rr/ui
//      (IPV4) https://rr.red-dove.com/ui
//

linkerscript ::=
	 entry_command? _command*

entry_command ::=
	 'ENTRY' '(' symbol ')'

_command ::=
	 assignment
	| sections_command
	| memory_command
	| phdrs_command

sections_command ::=
	 'SECTIONS' '{' _output_section_command* '}'

_output_section_command ::=
	 output_section
	| overlay_command
	| assignment
	| assert_command

output_section ::=
	 ( symbol | '/DISCARD/' ) expression? section_type? ':'? _at? '{' ( ( input_section | assignment | keep_command | provide_command ) ';'? )+ '}' region? lma_region? phdr? fillexp?

_at ::=
	 'AT' '(' expression ')'

region ::=
	 '>' symbol

lma_region ::=
	 'AT' '>' symbol

phdr ::=
	 ':' symbol

fillexp ::=
	 '=' expression

section_type ::=
	 '(' ( 'NOLOAD' | 'DSECT' | 'COPY' | 'INFO' | 'OVERLAY' ) ')'

input_section ::=
	 ( wildcard_pattern | filename | symbol ) ( '(' ( filename | expression | wildcard_pattern )+ ')' )?

wildcard_pattern ::=
	 ( '[' symbol ']' )? '*'

overlay_command ::=
	 'OVERLAY' expression? ':' 'NOCROSSREFS'? _at? '{' _output_section_command* '}' region? phdr? fillexp?

assignment ::=
	 ( symbol | '.' ) ( '=' | '+=' | '-=' | '*=' | '/=' | '<<=' | '>>=' | '&=' | '|=' ) expression ';'

assert_command ::=
	 'ASSERT' '(' expression ( ',' expression )* ')'

keep_command ::=
	 'KEEP' '(' input_section? ')'

provide_command ::=
	 ( 'PROVIDE' | 'PROVIDE_HIDDEN' ) '(' symbol '=' expression ')' ';'

memory_command ::=
	 'MEMORY' '{' _memory* '}'

_memory ::=
	 symbol ( '(' attributes ')' | attributes )? ':' ( 'ORIGIN' | 'org' | 'o' ) '=' expression ',' ( 'LENGTH' | 'len' | 'l' ) '=' expression

attributes ::=
	 [rwxail!]+

phdrs_command ::=
	 'PHDRS' '{' _phdr* '}'

_phdr ::=
	 symbol symbol 'FILEHDR'? 'PHDRS'? _at? ';'

expression ::=
	 conditional_expression
	| unary_expression
	| binary_expression
	| parenthesized_expression
	| call_expression
	| symbol
	| quoted_symbol
	| number
	| '.'

conditional_expression ::=
	 expression '?' expression? ':' expression

unary_expression ::=
	 ( '!' | '~' | '-' ) expression

binary_expression ::=
	 expression '+' expression
	| expression '-' expression
	| expression '*' expression
	| expression '/' expression
	| expression '%' expression
	| expression '||' expression
	| expression '&&' expression
	| expression '|' expression
	| expression '&' expression
	| expression '==' expression
	| expression '!=' expression
	| expression '>' expression
	| expression '>=' expression
	| expression '<=' expression
	| expression '<' expression
	| expression '<<' expression
	| expression '>>' expression

parenthesized_expression ::=
	 '(' expression ')'

call_expression ::=
	 expression argument_list

argument_list ::=
	 '(' ( ( expression | input_section ) ( ',' ( expression | input_section ) )* )? ')'

number ::=
	 ( '0'[xX][a-fA-F0-9]+ | '0'[bB][01]+ | '0'[0-7]+ | '0'|[1-9][0-9]*('h'|'H'|'o'|'O'|'b'|'B'|'d'|'D'|'K'|'M')? )

symbol ::=
	 [a-zA-Z_.][a-zA-Z0-9_.-]*

quoted_symbol ::=
	 '"'  [^"]* '"'

filename ::=
	 [^(){};=, #x09#x0A#x0B#x0C#x0D]+

comment ::=
	 ( '//' ('\'+('.'|'#x0D'?'#x0A')|[^\#x0A])* | '/*' [^*]*'\'*+([^/*][^*]*'\'*+)* '/' )