Wrap the mmap2 syscall

boot/symbol.s

@@ -2,7 +2,7 @@
 # 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/.
 
-.global symbol_table_build, symbol_table_find
+.global symbol_table_build, symbol_table_find, symbol_table_make_pointer
 
 .include "boot/definitions.inc"
 
@@ -18,6 +18,8 @@ symbol_builtin_name_word: .ascii "Word"
 symbol_builtin_name_byte: .ascii "Byte"
 .type symbol_builtin_name_char, @object
 symbol_builtin_name_char: .ascii "Char"
+.type symbol_builtin_name_bool, @object
+symbol_builtin_name_bool: .ascii "Bool"
 
 # Every type info starts with a word describing what type it is.
 
@@ -34,6 +36,9 @@ symbol_builtin_type_byte: .word TYPE_PRIMITIVE
 .type symbol_builtin_type_char, @object
 symbol_builtin_type_char: .word TYPE_PRIMITIVE
 	.word 1
+.type symbol_builtin_type_bool, @object
+symbol_builtin_type_bool: .word TYPE_PRIMITIVE
+	.word 1
 
 .section .bss
 
@@ -81,20 +86,19 @@ symbol_table_find:
 	beqz s2, .Lsymbol_table_find_not_found
 
 	# Compare string lengths.
+	mv a0, s3
+	mv a1, s4
 	lw a2, 0(s1)
-	bne s3, a2, .Lsymbol_table_find_continue
+	lw a3, 4(s1)
+	call _string_equal
 
-	# If lengths match, compare the content.
-	mv a0, s4
-	lw a1, 4(s1)
-	call _memcmp
-
-	bnez a0, .Lsymbol_table_find_continue
+	beqz a0, .Lsymbol_table_find_continue
 
 	lw a0, 8(s1) # Pointer to the symbol.
 	j .Lsymbol_table_end
 
 .Lsymbol_table_find_continue:
+	addi s1, s1, 12
 	addi s2, s2, -1
 	j .Lsymbol_table_find_loop
 
@@ -113,6 +117,22 @@ symbol_table_find:
 	addi sp, sp, 32
 	ret
 
+# Creates a pointer type.
+#
+# Parameters:
+# a0 - Pointer to the base type.
+# a1 - Output memory.
+#
+# Sets a0 to the size of newly created type in bytes.
+.type symbol_table_make_pointer, @function
+symbol_table_make_pointer:
+	li t0, TYPE_POINTER
+	sw t0, 0(a1)
+	sw a0, 4(a1)
+
+	li a0, 8
+	ret
+
 # Build the initial symbols.
 #
 # Sets a0 to the pointer to the global symbol table.
@@ -165,4 +185,15 @@ symbol_table_build:
 	sw t1, 0(a0)
 	addi t0, t0, 12
 
+	li t1, 4 # Length of the word "Bool".
+	sw t1, 0(t0)
+	la t1, symbol_builtin_name_bool
+	sw t1, 4(t0)
+	la t1, symbol_builtin_type_bool
+	sw t1, 8(t0)
+	lw t1, 0(a0)
+	addi t1, t1, 1
+	sw t1, 0(a0)
+	addi t0, t0, 12
+
 	ret