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Support simple variable assignment

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This commit is contained in:
Eugen Wissner
2025-09-01 09:57:18 +02:00
parent 627975775c
commit 44fa140769
8 changed files with 1454 additions and 505 deletions
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20
Rakefile
View File

@@ -44,13 +44,15 @@ task :convert do
end end
end end
rule /^build\/[[:alpha:]]+\/stage[[:digit:]]+$/ => ->(match) {
"#{match}.s"
} do |t|
sh CROSS_GCC, '-nostdlib', '-o', t.name, *t.prerequisites
end
STAGES.each do |stage| STAGES.each do |stage|
previous = stage.delete_prefix('stage').to_i.pred previous = stage.delete_prefix('stage').to_i.pred
file "build/valid/#{stage}" => "build/valid/#{stage}.s" do |t|
sh CROSS_GCC, '-nostdlib', '-o', t.name, *t.prerequisites
end
file "build/valid/#{stage}.s" => ["build/boot/#{stage}", "boot/#{stage}.elna"] do |t| file "build/valid/#{stage}.s" => ["build/boot/#{stage}", "boot/#{stage}.elna"] do |t|
exe, source = t.prerequisites exe, source = t.prerequisites
@@ -61,10 +63,6 @@ STAGES.each do |stage|
IO.copy_stream last_stdout, t.name IO.copy_stream last_stdout, t.name
end end
file "build/boot/#{stage}" => "build/boot/#{stage}.s" do |t|
sh CROSS_GCC, '-nostdlib', '-o', t.name, *t.prerequisites
end
file "build/boot/#{stage}.s" => ["build/valid/stage#{previous}", "boot/#{stage}.elna"] do |t| file "build/boot/#{stage}.s" => ["build/valid/stage#{previous}", "boot/#{stage}.elna"] do |t|
exe, source = t.prerequisites exe, source = t.prerequisites
@@ -80,12 +78,6 @@ end
# Stage 1. # Stage 1.
# #
file 'build/valid/stage1' => ['build/valid', 'build/valid/stage1.s'] do |t|
source = t.prerequisites.select { |prerequisite| prerequisite.end_with? '.s' }
sh CROSS_GCC, '-nostdlib', '-o', t.name, *source
end
file 'build/valid/stage1.s' => ['build/boot/stage1', 'boot/stage1.s', 'build/valid'] do |t| file 'build/valid/stage1.s' => ['build/boot/stage1', 'boot/stage1.s', 'build/valid'] do |t|
source, exe, = t.prerequisites.partition { |prerequisite| prerequisite.end_with? '.s' } source, exe, = t.prerequisites.partition { |prerequisite| prerequisite.end_with? '.s' }

5
boot/stage1.s
View File

@@ -2,6 +2,11 @@
# v. 2.0. If a copy of the MPL was not distributed with this file, You can # v. 2.0. If a copy of the MPL was not distributed with this file, You can
# obtain one at https://mozilla.org/MPL/2.0/. # obtain one at https://mozilla.org/MPL/2.0/.
# Stage1 compiler.
#
# It supports declaring and calling procedures without arguments.
# A procedure name should start with an underscore.
.equ SOURCE_BUFFER_SIZE, 81920 .equ SOURCE_BUFFER_SIZE, 81920
.equ SYS_READ, 63 .equ SYS_READ, 63

8
boot/stage2.elna
View File

@@ -4,8 +4,12 @@
# Stage2 compiler. # Stage2 compiler.
# #
# It supports declaring and calling procedures without arguments. # - Procedures without none or one argument.
# A procedure name should start with an underscore. # - Goto statements.
# - Character and integer literals.
# - Passing local variables to procedures.
# - Local variables should have the format: v00,
# where 00 is its offset from the sp register.
.section .rodata .section .rodata

8
boot/stage3.elna
View File

@@ -4,12 +4,8 @@
# Stage3 compiler. # Stage3 compiler.
# #
# - Procedures without none or one argument. # - Procedures with multiple arguments.
# - Goto statements. # - Character literals with and without escaping.
# - Character and integer literals.
# - Passing local variables to procedures.
# - Local variables should have the format: v00,
# where 00 is its offset from the sp register.
.section .rodata .section .rodata

238
boot/stage4.elna
View File

@@ -2,14 +2,13 @@
# v. 2.0. If a copy of the MPL was not distributed with this file, You can # v. 2.0. If a copy of the MPL was not distributed with this file, You can
# obtain one at https://mozilla.org/MPL/2.0/. # obtain one at https://mozilla.org/MPL/2.0/.
# Stage3 compiler. # Stage4 compiler.
# #
# - Procedures without none or one argument. # - Taking value of local and global variables. Variables that doesn't begin
# - Goto statements. # with "v" are considered global.
# - Character and integer literals. # - Simple variable assignment, e.g. v0 := 5 or v0 := global_variable;
# - Passing local variables to procedures. # 7 words on the stack, 28 - 56, are reversed for procedure arguments (caller side).
# - Local variables should have the format: v00, # - Take address unary operation "@".
# where 00 is its offset from the sp register.
.section .rodata .section .rodata
@@ -38,10 +37,10 @@ keyword_begin: .ascii "begin"
keyword_var: .ascii "var" keyword_var: .ascii "var"
.type asm_prologue, @object .type asm_prologue, @object
asm_prologue: .string "\taddi sp, sp, -32\n\tsw ra, 28(sp)\n\tsw s0, 24(sp)\n\taddi s0, sp, 32\n" asm_prologue: .string "\taddi sp, sp, -64\n\tsw ra, 60(sp)\n\tsw s0, 56(sp)\n\taddi s0, sp, 64\n"
.type asm_epilogue, @object .type asm_epilogue, @object
asm_epilogue: .string "\tlw ra, 28(sp)\n\tlw s0, 24(sp)\n\taddi sp, sp, 32\n\tret\n" asm_epilogue: .string "\tlw ra, 60(sp)\n\tlw s0, 56(sp)\n\taddi sp, sp, 64\n\tret\n"
.type asm_type_directive, @object .type asm_type_directive, @object
asm_type_directive: .string ".type " asm_type_directive: .string ".type "
@@ -64,23 +63,26 @@ asm_li: .string "\tli "
.type asm_lw, @object .type asm_lw, @object
asm_lw: .string "\tlw " asm_lw: .string "\tlw "
.type asm_la, @object
asm_la: .string "\tla "
.type asm_sw, @object .type asm_sw, @object
asm_sw: .string "\tsw " asm_sw: .string "\tsw "
.type asm_mv, @object .type asm_addi, @object
asm_mv: .string "mv " asm_addi: .string "\taddi "
.type asm_t0, @object .type asm_t0, @object
asm_t0: .string "t0" asm_t0: .string "t0"
.type asm_a0, @object .type asm_t1, @object
asm_a0: .string "a0" asm_t1: .string "t1"
.type asm_comma, @object .type asm_comma, @object
asm_comma: .string ", " asm_comma: .string ", "
.type asm_sp, @object .type asm_sp, @object
asm_sp: .string "(sp)" asm_sp: .string "sp"
.section .bss .section .bss
@@ -257,7 +259,7 @@ begin
_is_upper(); _is_upper();
sw a0, 4(sp) sw a0, 4(sp)
_is_lower(v00); _is_lower(v0);
lw t0, 0(sp) lw t0, 0(sp)
xori t1, t0, '_' xori t1, t0, '_'
@@ -292,7 +294,7 @@ begin
_is_alpha(); _is_alpha();
sw a0, 0(sp) sw a0, 0(sp)
_is_digit(v04); _is_digit(v4);
lw a1, 0(sp) lw a1, 0(sp)
or a0, a0, a1 or a0, a0, a1
@@ -491,7 +493,7 @@ begin
la a0, asm_li la a0, asm_li
_write_z(); _write_z();
la a0, asm_a0 la a0, asm_t0
_write_z(); _write_z();
la a0, asm_comma la a0, asm_comma
@@ -509,7 +511,7 @@ begin
la a0, asm_li la a0, asm_li
_write_z(); _write_z();
la a0, asm_a0 la a0, asm_t0
_write_z(); _write_z();
la a0, asm_comma la a0, asm_comma
@@ -542,43 +544,51 @@ end;
proc _compile_variable_expression(); proc _compile_variable_expression();
begin begin
_compile_designator();
la a0, asm_lw la a0, asm_lw
_write_z(); _write_z();
la a0, asm_a0 la a0, asm_t0
_write_z(); _write_z();
la a0, asm_comma la a0, asm_comma
_write_z(); _write_z();
_advance_token(1); _write_c('(');
_read_token(); la a0, asm_t0
_write_token();
_advance_token();
la a0, asm_sp
_write_z(); _write_z();
_write_c(')');
_write_c('\n'); _write_c('\n');
end; end;
proc _compile_address_expression();
begin
# Skip the "@" sign.
_advance_token(1);
_compile_designator();
end;
proc _compile_expression(); proc _compile_expression();
begin begin
la t0, source_code_position la t0, source_code_position
lw t0, (t0) lw t0, (t0)
lb a0, (t0) lb a0, (t0)
sw a0, 0(sp)
li t1, '\'' li t1, '\''
beq a0, t1, .compile_expression_character_literal beq a0, t1, .compile_expression_character_literal
li t1, 'v' li t1, '@'
beq a0, t1, .compile_expression_variable beq a0, t1, .compile_expression_address
_is_digit(); _is_digit(v0);
bnez a0, .compile_expression_integer_literal bnez a0, .compile_expression_integer_literal
goto .compile_expression_end; goto .compile_expression_variable;
.compile_expression_character_literal: .compile_expression_character_literal:
_compile_character_literal(); _compile_character_literal();
@@ -588,9 +598,13 @@ begin
_compile_integer_literal(); _compile_integer_literal();
goto .compile_expression_end; goto .compile_expression_end;
.compile_expression_address:
_compile_address_expression();
goto .compile_expression_end;
.compile_expression_variable: .compile_expression_variable:
_compile_variable_expression(); _compile_variable_expression();
goto .compile_expression_end;; goto .compile_expression_end;
.compile_expression_end: .compile_expression_end:
end; end;
@@ -628,22 +642,24 @@ begin
la a0, asm_sw la a0, asm_sw
_write_z(); _write_z();
la a0, asm_a0 la a0, asm_t0
_write_z(); _write_z();
la a0, asm_comma la a0, asm_comma
_write_z(); _write_z();
# Calculate the stack offset: 20 - (4 * argument_counter) # Calculate the stack offset: 52 - (4 * argument_counter)
lw t0, 8(sp) lw t0, 8(sp)
li t1, 4 li t1, 4
mul t0, t0, t1 mul t0, t0, t1
li t1, 20 li t1, 52
sub a0, t1, t0 sub a0, t1, t0
_write_i(); _write_i();
_write_c('(')
la a0, asm_sp la a0, asm_sp
_write_z(); _write_z();
_write_c(')')
_write_c('\n'); _write_c('\n');
@@ -683,17 +699,19 @@ begin
la a0, asm_comma la a0, asm_comma
_write_z(); _write_z();
# Calculate the stack offset: 20 - (4 * argument_counter) # Calculate the stack offset: 52 - (4 * argument_counter)
lw t0, 8(sp) lw t0, 8(sp)
li t1, 4 li t1, 4
mul t0, t0, t1 mul t0, t0, t1
li t1, 20 li t1, 52
sub a0, t1, t0 sub a0, t1, t0
_write_i(); _write_i();
_write_c('(');
la a0, asm_sp la a0, asm_sp
_write_z(); _write_z();
_write_c(')');
_write_c('\n'); _write_c('\n');
goto .compile_call_finalize; goto .compile_call_finalize;
@@ -702,7 +720,7 @@ begin
la a0, asm_call la a0, asm_call
_write_z(); _write_z();
_write_s(v04, v00); _write_s(v4, v0);
# Skip the right paren. # Skip the right paren.
_advance_token(1); _advance_token(1);
@@ -718,10 +736,143 @@ begin
la a0, asm_j la a0, asm_j
_write_z(); _write_z();
_write_token(v00); _write_token(v0);
_advance_token(); _advance_token();
end; end;
proc _compile_local_designator();
begin
# Skip "v" in the local variable name.
_advance_token(1);
la a0, asm_addi
_write_z();
la a0, asm_t0
_write_z();
la a0, asm_comma
_write_z();
la a0, asm_sp
_write_z();
la a0, asm_comma
_write_z();
# Read local variable stack offset and save it.
la t0, source_code_position
lw t0, (t0)
sw t0, 0(sp)
_read_token();
sw a0, 4(sp)
_write_token();
_advance_token();
_write_c('\n');
end;
proc _compile_global_designator();
begin
la a0, asm_la
_write_z();
la a0, asm_t0
_write_z();
la a0, asm_comma
_write_z();
_read_token();
_write_token();
_advance_token();
_write_c('\n');
end;
proc _compile_designator();
begin
la t0, source_code_position
lw t0, (t0)
lb a0, (t0)
li t1, 'v'
beq a0, t1, .compile_designator_local
goto .compile_designator_global;
.compile_designator_local:
_compile_local_designator();
goto .compile_designator_end;
.compile_designator_global:
_compile_global_designator();
goto .compile_designator_end;
.compile_designator_end:
end;
proc _compile_assignment();
begin
_compile_designator();
# Save the assignee address on the stack.
la a0, asm_sw
_write_z();
la a0, asm_t0
_write_z();
la a0, asm_comma
_write_z();
_write_i(20);
_write_c('(');
la a0, asm_sp
_write_z();
_write_c(')');
_write_c('\n');
# Skip the assignment sign (:=) with surrounding whitespaces.
_advance_token(4);
# Compile the assignment.
_compile_expression();
la a0, asm_lw
_write_z();
la a0, asm_t1
_write_z();
la a0, asm_comma
_write_z();
_write_i(20);
_write_c('(');
la a0, asm_sp
_write_z();
_write_c(')');
_write_c('\n');
la a0, asm_sw
_write_z();
la a0, asm_t0
_write_z();
la a0, asm_comma
_write_z();
_write_c('(');
la a0, asm_t1
_write_z();
_write_c(')');
end;
proc _compile_statement(); proc _compile_statement();
begin begin
# This is a call if the statement starts with an underscore. # This is a call if the statement starts with an underscore.
@@ -737,6 +888,9 @@ begin
li t1, 'g' li t1, 'g'
beq t0, t1, .compile_statement_goto beq t0, t1, .compile_statement_goto
li t1, 'v'
beq t0, t1, .compile_statement_assignment
_compile_line(); _compile_line();
goto .compile_statement_end; goto .compile_statement_end;
@@ -752,6 +906,12 @@ begin
goto .compile_statement_semicolon; goto .compile_statement_semicolon;
.compile_statement_assignment:
_advance_token(1);
_compile_assignment();
goto .compile_statement_semicolon;
.compile_statement_semicolon: .compile_statement_semicolon:
_advance_token(2); _advance_token(2);
@@ -789,13 +949,13 @@ begin
la a0, asm_type_directive la a0, asm_type_directive
_write_z(); _write_z();
_write_token(v00); _write_token(v0);
la a0, asm_type_function la a0, asm_type_function
_write_z(); _write_z();
# Write procedure label, _procedure_name: # Write procedure label, _procedure_name:
_write_token(v00); _write_token(v0);
la a0, asm_colon la a0, asm_colon
_write_z(); _write_z();

315
boot/stage5.elna
View File

@@ -2,14 +2,13 @@
# v. 2.0. If a copy of the MPL was not distributed with this file, You can # v. 2.0. If a copy of the MPL was not distributed with this file, You can
# obtain one at https://mozilla.org/MPL/2.0/. # obtain one at https://mozilla.org/MPL/2.0/.
# Stage3 compiler. # Stage4 compiler.
# #
# - Procedures without none or one argument. # - Taking value of local and global variables. Variables that doesn't begin
# - Goto statements. # with "v" are considered global.
# - Character and integer literals. # - Simple variable assignment, e.g. v0 := 5 or v0 := global_variable;
# - Passing local variables to procedures. # 7 words on the stack, 28 - 56, are reversed for procedure arguments (caller side).
# - Local variables should have the format: v00, # - Take address unary operation "@".
# where 00 is its offset from the sp register.
.section .rodata .section .rodata
@@ -38,10 +37,10 @@ keyword_begin: .ascii "begin"
keyword_var: .ascii "var" keyword_var: .ascii "var"
.type asm_prologue, @object .type asm_prologue, @object
asm_prologue: .string "\taddi sp, sp, -32\n\tsw ra, 28(sp)\n\tsw s0, 24(sp)\n\taddi s0, sp, 32\n" asm_prologue: .string "\taddi sp, sp, -64\n\tsw ra, 60(sp)\n\tsw s0, 56(sp)\n\taddi s0, sp, 64\n"
.type asm_epilogue, @object .type asm_epilogue, @object
asm_epilogue: .string "\tlw ra, 28(sp)\n\tlw s0, 24(sp)\n\taddi sp, sp, 32\n\tret\n" asm_epilogue: .string "\tlw ra, 60(sp)\n\tlw s0, 56(sp)\n\taddi sp, sp, 64\n\tret\n"
.type asm_type_directive, @object .type asm_type_directive, @object
asm_type_directive: .string ".type " asm_type_directive: .string ".type "
@@ -64,23 +63,26 @@ asm_li: .string "\tli "
.type asm_lw, @object .type asm_lw, @object
asm_lw: .string "\tlw " asm_lw: .string "\tlw "
.type asm_la, @object
asm_la: .string "\tla "
.type asm_sw, @object .type asm_sw, @object
asm_sw: .string "\tsw " asm_sw: .string "\tsw "
.type asm_mv, @object .type asm_addi, @object
asm_mv: .string "mv " asm_addi: .string "\taddi "
.type asm_t0, @object .type asm_t0, @object
asm_t0: .string "t0" asm_t0: .string "t0"
.type asm_a0, @object .type asm_t1, @object
asm_a0: .string "a0" asm_t1: .string "t1"
.type asm_comma, @object .type asm_comma, @object
asm_comma: .string ", " asm_comma: .string ", "
.type asm_sp, @object .type asm_sp, @object
asm_sp: .string "(sp)" asm_sp: .string "sp"
.section .bss .section .bss
@@ -257,7 +259,7 @@ begin
_is_upper(); _is_upper();
sw a0, 4(sp) sw a0, 4(sp)
_is_lower(v00); _is_lower(v0);
lw t0, 0(sp) lw t0, 0(sp)
xori t1, t0, '_' xori t1, t0, '_'
@@ -292,7 +294,7 @@ begin
_is_alpha(); _is_alpha();
sw a0, 0(sp) sw a0, 0(sp)
_is_digit(v04); _is_digit(v4);
lw a1, 0(sp) lw a1, 0(sp)
or a0, a0, a1 or a0, a0, a1
@@ -413,12 +415,7 @@ end;
proc _write_token(); proc _write_token();
begin begin
sw a0, 0(sp) sw a0, 0(sp)
_write_s(source_code_position, v0);
la a0, source_code_position
lw a0, (a0)
lw a1, 0(sp)
_write_s();
lw a0, 0(sp) lw a0, 0(sp)
end; end;
@@ -488,14 +485,9 @@ end;
proc _compile_integer_literal(); proc _compile_integer_literal();
begin begin
la a0, asm_li _write_z(@asm_li);
_write_z(); _write_z(@asm_t0);
_write_z(@asm_comma);
la a0, asm_a0
_write_z();
la a0, asm_comma
_write_z();
_read_token(); _read_token();
_write_token(); _write_token();
@@ -506,14 +498,9 @@ end;
proc _compile_character_literal(); proc _compile_character_literal();
begin begin
la a0, asm_li _write_z(@asm_li);
_write_z(); _write_z(@asm_t0);
_write_z(@asm_comma);
la a0, asm_a0
_write_z();
la a0, asm_comma
_write_z();
_write_c('\''); _write_c('\'');
_advance_token(1); _advance_token(1);
@@ -542,43 +529,45 @@ end;
proc _compile_variable_expression(); proc _compile_variable_expression();
begin begin
la a0, asm_lw _compile_designator();
_write_z();
la a0, asm_a0 _write_z(@asm_lw);
_write_z(); _write_z(@asm_t0);
_write_z(@asm_comma);
la a0, asm_comma _write_c('(');
_write_z(); _write_z(@asm_t0);
_advance_token(1);
_read_token();
_write_token();
_advance_token();
la a0, asm_sp
_write_z();
_write_c(')');
_write_c('\n'); _write_c('\n');
end; end;
proc _compile_address_expression();
begin
# Skip the "@" sign.
_advance_token(1);
_compile_designator();
end;
proc _compile_expression(); proc _compile_expression();
begin begin
la t0, source_code_position la t0, source_code_position
lw t0, (t0) lw t0, (t0)
lb a0, (t0) lb a0, (t0)
sw a0, 0(sp)
li t1, '\'' li t1, '\''
beq a0, t1, .compile_expression_character_literal beq a0, t1, .compile_expression_character_literal
li t1, 'v' li t1, '@'
beq a0, t1, .compile_expression_variable beq a0, t1, .compile_expression_address
_is_digit(); _is_digit(v0);
bnez a0, .compile_expression_integer_literal bnez a0, .compile_expression_integer_literal
goto .compile_expression_end; goto .compile_expression_variable;
.compile_expression_character_literal: .compile_expression_character_literal:
_compile_character_literal(); _compile_character_literal();
@@ -588,9 +577,13 @@ begin
_compile_integer_literal(); _compile_integer_literal();
goto .compile_expression_end; goto .compile_expression_end;
.compile_expression_address:
_compile_address_expression();
goto .compile_expression_end;
.compile_expression_variable: .compile_expression_variable:
_compile_variable_expression(); _compile_variable_expression();
goto .compile_expression_end;; goto .compile_expression_end;
.compile_expression_end: .compile_expression_end:
end; end;
@@ -604,9 +597,7 @@ begin
_read_token(); _read_token();
sw a0, 0(sp) sw a0, 0(sp)
la t0, source_code_position v4 := source_code_position
lw t0, (t0)
sw t0, 4(sp)
sw zero, 8(sp) sw zero, 8(sp)
@@ -625,25 +616,21 @@ begin
_compile_expression(); _compile_expression();
# Save the argument on the stack. # Save the argument on the stack.
la a0, asm_sw _write_z(@asm_sw);
_write_z(); _write_z(@asm_t0);
_write_z(@asm_comma);
la a0, asm_a0 # Calculate the stack offset: 52 - (4 * argument_counter)
_write_z();
la a0, asm_comma
_write_z();
# Calculate the stack offset: 20 - (4 * argument_counter)
lw t0, 8(sp) lw t0, 8(sp)
li t1, 4 li t1, 4
mul t0, t0, t1 mul t0, t0, t1
li t1, 20 li t1, 52
sub a0, t1, t0 sub a0, t1, t0
_write_i(); _write_i();
la a0, asm_sp _write_c('(');
_write_z(); _write_z(@asm_sp);
_write_c(')')
_write_c('\n'); _write_c('\n');
@@ -673,36 +660,34 @@ begin
addi t0, t0, -1 addi t0, t0, -1
sw t0, 8(sp) sw t0, 8(sp)
la a0, asm_lw _write_z(@asm_lw);
_write_z();
_write_c('a'); _write_c('a');
lw a0, 8(sp) lw a0, 8(sp)
_write_i(); _write_i();
la a0, asm_comma _write_z(@asm_comma);
_write_z();
# Calculate the stack offset: 20 - (4 * argument_counter) # Calculate the stack offset: 52 - (4 * argument_counter)
lw t0, 8(sp) lw t0, 8(sp)
li t1, 4 li t1, 4
mul t0, t0, t1 mul t0, t0, t1
li t1, 20 li t1, 52
sub a0, t1, t0 sub a0, t1, t0
_write_i(); _write_i();
la a0, asm_sp _write_c('(');
_write_z(); _write_z(@asm_sp);
_write_c(')');
_write_c('\n'); _write_c('\n');
goto .compile_call_finalize; goto .compile_call_finalize;
.compile_call_end: .compile_call_end:
la a0, asm_call _write_z(@asm_call);
_write_z();
_write_s(v04, v00); _write_s(v4, v0);
# Skip the right paren. # Skip the right paren.
_advance_token(1); _advance_token(1);
@@ -715,13 +700,111 @@ begin
_read_token(); _read_token();
sw a0, 0(sp) sw a0, 0(sp)
la a0, asm_j _write_z(@asm_j);
_write_z();
_write_token(v00); _write_token(v0);
_advance_token(); _advance_token();
end; end;
proc _compile_local_designator();
begin
# Skip "v" in the local variable name.
_advance_token(1);
_write_z(@asm_addi);
_write_z(@asm_t0);
_write_z(@asm_comma);
_write_z(@asm_sp);
_write_z(@asm_comma);
# Read local variable stack offset and save it.
v0 := source_code_position;
_read_token();
sw a0, 4(sp)
_write_token();
_advance_token();
_write_c('\n');
end;
proc _compile_global_designator();
begin
_write_z(@asm_la);
_write_z(@asm_t0);
_write_z(@asm_comma);
_read_token();
_write_token();
_advance_token();
_write_c('\n');
end;
proc _compile_designator();
begin
la t0, source_code_position
lw t0, (t0)
lb a0, (t0)
li t1, 'v'
beq a0, t1, .compile_designator_local
goto .compile_designator_global;
.compile_designator_local:
_compile_local_designator();
goto .compile_designator_end;
.compile_designator_global:
_compile_global_designator();
goto .compile_designator_end;
.compile_designator_end:
end;
proc _compile_assignment();
begin
_compile_designator();
# Save the assignee address on the stack.
_write_z(@asm_sw);
_write_z(@asm_t0);
_write_z(@asm_comma);
_write_i(20);
_write_c('(');
_write_z(@asm_sp);
_write_c(')');
_write_c('\n');
# Skip the assignment sign (:=) with surrounding whitespaces.
_advance_token(4);
# Compile the assignment.
_compile_expression();
_write_z(@asm_lw);
_write_z(@asm_t1);
_write_z(@asm_comma);
_write_i(20);
_write_c('(');
_write_z(@asm_sp);
_write_c(')');
_write_c('\n');
_write_z(@asm_sw);
_write_z(@asm_t0);
_write_z(@asm_comma);
_write_c('(');
_write_z(@asm_t1);
_write_c(')');
end;
proc _compile_statement(); proc _compile_statement();
begin begin
# This is a call if the statement starts with an underscore. # This is a call if the statement starts with an underscore.
@@ -737,6 +820,9 @@ begin
li t1, 'g' li t1, 'g'
beq t0, t1, .compile_statement_goto beq t0, t1, .compile_statement_goto
li t1, 'v'
beq t0, t1, .compile_statement_assignment
_compile_line(); _compile_line();
goto .compile_statement_end; goto .compile_statement_end;
@@ -752,6 +838,12 @@ begin
goto .compile_statement_semicolon; goto .compile_statement_semicolon;
.compile_statement_assignment:
_advance_token(1);
_compile_assignment();
goto .compile_statement_semicolon;
.compile_statement_semicolon: .compile_statement_semicolon:
_advance_token(2); _advance_token(2);
@@ -789,30 +881,27 @@ begin
la a0, asm_type_directive la a0, asm_type_directive
_write_z(); _write_z();
_write_token(v00); _write_token(v0);
la a0, asm_type_function la a0, asm_type_function
_write_z(); _write_z();
# Write procedure label, _procedure_name: # Write procedure label, _procedure_name:
_write_token(v00); _write_token(v0);
la a0, asm_colon _write_z(@asm_colon);
_write_z();
# Skip the function name and trailing parens, semicolon, "begin" and newline. # Skip the function name and trailing parens, semicolon, "begin" and newline.
lw a0, 0(sp) lw a0, 0(sp)
addi a0, a0, 10 addi a0, a0, 10
_advance_token(); _advance_token();
la a0, asm_prologue _write_z(@asm_prologue);
_write_z();
_compile_procedure_body(); _compile_procedure_body();
# Write the epilogue. # Write the epilogue.
la a0, asm_epilogue _write_z(@asm_epilogue);
_write_z();
# Skip the "end" keyword, semicolon and newline. # Skip the "end" keyword, semicolon and newline.
_advance_token(5); _advance_token(5);
@@ -882,37 +971,22 @@ begin
li t1, '#' li t1, '#'
beq t0, t1, .compile_comment beq t0, t1, .compile_comment
la a0, source_code_position # 8 is ".section" length.
lw a0, (a0) _memcmp(source_code_position, @keyword_section, 8);
la a1, keyword_section
li a2, 8 # ".section" length.
_memcmp();
beqz a0, .compile_section beqz a0, .compile_section
la a0, source_code_position # 5 is ".type" length.
lw a0, (a0) _memcmp(source_code_position, @keyword_type, 5);
la a1, keyword_type
li a2, 5 # ".type" length.
_memcmp();
beqz a0, .compile_type beqz a0, .compile_type
la a0, source_code_position # 5 is "proc " length. Space is needed to distinguish from "procedure".
lw a0, (a0) _memcmp(source_code_position, @keyword_proc, 5);
la a1, keyword_proc
li a2, 5 # "proc " length. Space is needed to distinguish from "procedure".
_memcmp();
beqz a0, .compile_procedure beqz a0, .compile_procedure
la a0, source_code_position # 6 is ".globl" length.
lw a0, (a0) _memcmp(source_code_position, @keyword_global, 6);
la a1, keyword_global
li a2, 6 # ".globl" length.
_memcmp();
beqz a0, .compile_global beqz a0, .compile_global
# Not a known token, exit. # Not a known token, exit.
goto .compile_end; goto .compile_end;
@@ -959,9 +1033,8 @@ end;
proc _start(); proc _start();
begin begin
# Read the source from the standard input. # Read the source from the standard input.
la a0, source_code # Second argument is buffer size. Modifying update the source_code definition.
li a1, 81920 # Buffer size. _read_file(@source_code, 81920);
_read_file();
_compile(); _compile();
_exit(0); _exit(0);

1042
boot/stage6.elna Normal file
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323
rakelib/cross.rake
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@@ -1,323 +0,0 @@
# This Source Code Form is subject to the terms of the Mozilla Public License,
# v. 2.0. If a copy of the MPL was not distributed with this file, You can
# obtain one at https://mozilla.org/MPL/2.0/. -}
# frozen_string_literal: true
require 'pathname'
require 'uri'
require 'net/http'
require 'rake/clean'
require 'open3'
require 'etc'
GCC_VERSION = "15.1.0"
BINUTILS_VERSION = '2.44'
GLIBC_VERSION = '2.41'
KERNEL_VERSION = '5.15.181'
CLOBBER.include 'build'
class BuildTarget
attr_accessor(:build, :gcc, :target, :tmp)
def gxx
@gcc.gsub 'c', '+'
end
def sysroot
tmp + 'sysroot'
end
def rootfs
tmp + 'rootfs'
end
def tools
tmp + 'tools'
end
end
def gcc_verbose(gcc_binary)
read, write = IO.pipe
sh({'LANG' => 'C'}, gcc_binary, '--verbose', err: write)
write.close
output = read.read
read.close
output
end
def find_build_target(gcc_version, task)
gcc_binary = 'gcc'
output = gcc_verbose gcc_binary
if output.start_with? 'Apple clang'
gcc_binary = "gcc-#{gcc_version.split('.').first}"
output = gcc_verbose gcc_binary
end
result = output
.lines
.each_with_object(BuildTarget.new) do |line, accumulator|
if line.start_with? 'Target: '
accumulator.build = line.split(' ').last.strip
elsif line.start_with? 'COLLECT_GCC'
accumulator.gcc = line.split('=').last.strip
end
end
result.tmp = Pathname.new('./build')
task.with_defaults target: 'riscv32-unknown-linux-gnu'
result.target = task[:target]
result
end
def download_and_unarchive(url, target)
case File.extname url.path
when '.bz2'
archive_type = '-j'
root_directory = File.basename url.path, '.tar.bz2'
when '.xz'
archive_type = '-J'
root_directory = File.basename url.path, '.tar.xz'
else
raise "Unsupported archive type #{url.path}."
end
Net::HTTP.start(url.host, url.port, use_ssl: url.scheme == 'https') do |http|
request = Net::HTTP::Get.new url.request_uri
http.request request do |response|
case response
when Net::HTTPRedirection
download_and_unarchive URI.parse(response['location'])
when Net::HTTPSuccess
Open3.popen2 'tar', '-C', target.to_path, archive_type, '-xv' do |stdin, stdout, wait_thread|
Thread.new do
stdout.each { |line| puts line }
end
response.read_body do |chunk|
stdin.write chunk
end
stdin.close
wait_thread.value
end
else
response.error!
end
end
end
target + root_directory
end
namespace :cross do
desc 'Build cross binutils'
task :binutils, [:target] do |_, args|
options = find_build_target GCC_VERSION, args
options.tools.mkpath
source_directory = download_and_unarchive(
URI.parse("https://ftp.gnu.org/gnu/binutils/binutils-#{BINUTILS_VERSION}.tar.xz"),
options.tools)
cwd = source_directory.dirname + 'build-binutils'
cwd.mkpath
options.rootfs.mkpath
env = {
'CC' => options.gcc,
'CXX' => options.gxx
}
configure_options = [
"--prefix=#{options.rootfs.realpath}",
"--target=#{options.target}",
'--disable-nls',
'--enable-gprofng=no',
'--disable-werror',
'--enable-default-hash-style=gnu',
'--disable-libquadmath'
]
configure = source_directory.relative_path_from(cwd) + 'configure'
sh env, configure.to_path, *configure_options, chdir: cwd.to_path
sh env, 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path
sh env, 'make', 'install', chdir: cwd.to_path
end
desc 'Build stage 1 GCC'
task :gcc1, [:target] do |_, args|
options = find_build_target GCC_VERSION, args
options.tools.mkpath
source_directory = download_and_unarchive(
URI.parse("https://gcc.gnu.org/pub/gcc/releases/gcc-#{GCC_VERSION}/gcc-#{GCC_VERSION}.tar.xz"),
options.tools)
cwd = source_directory.dirname + 'build-gcc'
cwd.mkpath
options.rootfs.mkpath
options.sysroot.mkpath
sh 'contrib/download_prerequisites', chdir: source_directory.to_path
configure_options = [
"--prefix=#{options.rootfs.realpath}",
"--with-sysroot=#{options.sysroot.realpath}",
'--enable-languages=c,c++',
'--disable-shared',
'--with-arch=rv32imafdc',
'--with-abi=ilp32d',
'--with-tune=rocket',
'--with-isa-spec=20191213',
'--disable-bootstrap',
'--disable-multilib',
'--disable-libmudflap',
'--disable-libssp',
'--disable-libquadmath',
'--disable-libsanitizer',
'--disable-threads',
'--disable-libatomic',
'--disable-libgomp',
'--disable-libvtv',
'--disable-libstdcxx',
'--disable-nls',
'--with-newlib',
'--without-headers',
"--target=#{options.target}",
"--build=#{options.build}",
"--host=#{options.build}"
]
flags = '-O2 -fPIC'
env = {
'CC' => options.gcc,
'CXX' => options.gxx,
'CFLAGS' => flags,
'CXXFLAGS' => flags,
'PATH' => "#{options.rootfs.realpath + 'bin'}:#{ENV['PATH']}"
}
configure = source_directory.relative_path_from(cwd) + 'configure'
sh env, configure.to_path, *configure_options, chdir: cwd.to_path
sh env, 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path
sh env, 'make', 'install', chdir: cwd.to_path
end
desc 'Copy glibc headers'
task :headers, [:target] do |_, args|
options = find_build_target GCC_VERSION, args
options.tools.mkpath
source_directory = download_and_unarchive(
URI.parse("https://ftp.gnu.org/gnu/glibc/glibc-#{GLIBC_VERSION}.tar.xz"),
options.tools)
include_directory = options.tools + 'include'
include_directory.mkpath
cp (source_directory + 'elf/elf.h'), (include_directory + 'elf.h')
end
desc 'Build linux kernel'
task :kernel, [:target] do |_, args|
options = find_build_target GCC_VERSION, args
options.tools.mkpath
cwd = download_and_unarchive(
URI.parse("https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-#{KERNEL_VERSION}.tar.xz"),
options.tools)
env = {
'CROSS_COMPILE' => "#{options.target}-",
'ARCH' => 'riscv',
'PATH' => "#{options.rootfs.realpath + 'bin'}:#{ENV['PATH']}",
'HOSTCFLAGS' => "-D_UUID_T -D__GETHOSTUUID_H -I#{options.tools.realpath + 'include'}"
}
sh env, 'make', 'rv32_defconfig', chdir: cwd.to_path
sh env, 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path
sh env, 'make', 'headers', chdir: cwd.to_path
user_directory = options.sysroot + 'usr'
user_directory.mkpath
cp_r (cwd + 'usr/include'), (user_directory + 'include')
end
desc 'Build glibc'
task :glibc, [:target] do |_, args|
options = find_build_target GCC_VERSION, args
source_directory = options.tools + "glibc-#{GLIBC_VERSION}"
configure_options = [
'--prefix=/usr',
"--host=#{options.target}",
"--target=#{options.target}",
"--build=#{options.build}",
"--enable-kernel=#{KERNEL_VERSION}",
"--with-headers=#{options.sysroot.realpath + 'usr/include'}",
'--disable-nscd',
'--disable-libquadmath',
'--disable-libitm',
'--disable-werror',
'libc_cv_forced_unwind=yes'
]
bin = options.rootfs.realpath + 'bin'
env = {
'PATH' => "#{bin}:#{ENV['PATH']}",
'MAKE' => 'make' # Otherwise it uses gnumake which can be different and too old.
}
cwd = source_directory.dirname + 'build-glibc'
cwd.mkpath
configure = source_directory.relative_path_from(cwd) +'./configure'
sh env, configure.to_path, *configure_options, chdir: cwd.to_path
sh env, 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path
sh env, 'make', "install_root=#{options.sysroot.realpath}", 'install', chdir: cwd.to_path
end
desc 'Build stage 2 GCC'
task :gcc2, [:target] do |_, args|
options = find_build_target GCC_VERSION, args
source_directory = options.tools + "gcc-#{GCC_VERSION}"
cwd = options.tools + 'build-gcc'
rm_rf cwd
cwd.mkpath
configure_options = [
"--prefix=#{options.rootfs.realpath}",
"--with-sysroot=#{options.sysroot.realpath}",
'--enable-languages=c,c++,lto',
'--enable-lto',
'--enable-shared',
'--with-arch=rv32imafdc',
'--with-abi=ilp32d',
'--with-tune=rocket',
'--with-isa-spec=20191213',
'--disable-bootstrap',
'--disable-multilib',
'--enable-checking=release',
'--disable-libssp',
'--disable-libquadmath',
'--enable-threads=posix',
'--with-default-libstdcxx-abi=new',
'--disable-nls',
"--target=#{options.target}",
"--build=#{options.build}",
"--host=#{options.build}"
]
flags = '-O2 -fPIC'
env = {
'CFLAGS' => flags,
'CXXFLAGS' => flags,
'PATH' => "#{options.rootfs.realpath + 'bin'}:#{ENV['PATH']}"
}
configure = source_directory.relative_path_from(cwd) + 'configure'
sh env, configure.to_path, *configure_options, chdir: cwd.to_path
sh env, 'make', '-j', Etc.nprocessors.to_s, chdir: cwd.to_path
sh env, 'make', 'install', chdir: cwd.to_path
end
end
desc 'Build cross toolchain'
task cross: [
'cross:binutils',
'cross:gcc1',
'cross:headers',
'cross:kernel',
'cross:glibc',
'cross:gcc2'
] do
end