X-Git-Url: https://git.rrq.au/?a=blobdiff_plain;f=rrqforth.asm;h=fd377099761171f0f06149912e25882c9f3bfa98;hb=6d4bf76e83379163ae7e027807f79f6cb14a9799;hp=c4b63b4e62d66bc362acc3a1c1fc5a55ddcbdd19;hpb=0d3bd729048b79778f83f100fbaab1970f4efc05;p=rrq%2Frrqforth.git

diff --git a/rrqforth.asm b/rrqforth.asm
index c4b63b4..fd37709 100644
--- a/rrqforth.asm
+++ b/rrqforth.asm
@@ -2,33 +2,12 @@
 	format elf64 executable
 	entry main
 
-previous_word = 0	; Used for chaining the words
-
 include 'machine.asm'
 
 ;;; ============================================================
 
-	segment readable executable
-
-;;; This is the very first word
+	segment readable writable executable
 	
-	;; FORTH is the last word of WORDLIST FORTH
-	WORD p_forth,'FORTH',dowordlist
-	;; ( -- )
-	;; Change to use this wordlist
-	dq last_forth_word
-
-	WORD p_system,'SYSTEM',dowordlist
-	;; ( -- )
-	;; Change to use this wordlist
-	dq last_system_word
-
-last_wordlists_word:
-	WORD p_wordlists,'WORDLISTS',dowordlist
-	;; ( -- )
-	;; Change to use this wordlist
-	dq p_wordlists_TFA
-
 ;;; ========================================
 ;;; These are the core "execution semantics" words, which are placed
 ;;; first so as to remain at the same binary address at successive
@@ -46,6 +25,8 @@ last_wordlists_word:
 ;;; rbp = return stack pointer
 ;;; 
 
+previous_word = 0	; Used for chaining the words
+
 	WORD p_dofasm,'doFASM',dovariable
 	;; Execution semantics for assembly words.
 dofasm:
@@ -92,22 +73,19 @@ dostring:
 	pushpname rax
 	next
 
-	WORD p_dowordlist,'doWORDLIST',dovariable
-	;; Execution semantics for DOES>
-	;; [cfa-8] holds the adjustment offset ("does offset")
-dowordlist:
-	pushr rsi
-	lea rsi, [rax+8] 	; rsi = the DFA of the rax word
-	add rsi,qword [rax-8]	; adjust rsi by the "does offset'
-	next
-
+	WORD p_calltrace,'calltrace',dovalue
+	;; Common call point for debugging
+	;; rax = cfa of called word
+	;; rsi = cell* of next forth word
+	;; [$rsp] = from where the call was
+	ret
 
 include 'syscalls.asm'
 
 ;;; ========================================
 ;;; The stacks are placed here.
 	
-	segment readable writable
+	;segment readable writable
 
 	WORD return_stack,'RETURN-STACK',dovariable
 	;; The return stack
@@ -122,15 +100,22 @@ last_system_word:
 	rb 1048576		; 1 Mb data stack
 DS_TOP:				; The initial rsp
 
+
 ;;; ========================================
 ;;; Core execution control words
 
-	segment readable executable
+	;segment readable executable
 
 ;;; At fasm compilation: reset previous_word to make a new word list
 ;;; Words above belong to the SYSTEM wordlist, and the following
 ;;; belong to the FORTH wordlist.
-previous_word = last_wordlists_word
+previous_word = 0
+
+	WORD p_system,'SYSTEM',dovariable
+	;; ( -- dfa )
+	;; The SYSTEM word list
+	dq last_system_word	; tfa of last SYSTEM word
+	dq p_forth_DFA		; dfa of successor word list
 
 	WORD inline_code,'[ASM]',fasm
 	;; ( -- )
@@ -141,10 +126,9 @@ previous_word = last_wordlists_word
 	jmp qword rsi
 
 	WORD p_execute,'EXECUTE',fasm
-	;; ( tfa -- )
+	;; ( cfa -- )
 	;; Execute the word
 	pop rax
-	tfa2cfa rax
 	jmp qword [rax]		; goto code of that FORTH word (64 bit jump)
 	
 	WORD p_exit, 'EXIT',fasm
@@ -187,7 +171,7 @@ p_zero_branch_SKIP:
 ;;; ========================================
 ;;; Core extension(s)
 
-	segment readable writable executable
+	;segment readable writable executable
 	
 include 'wordlists.asm'
 include 'memory.asm'
@@ -198,18 +182,49 @@ include 'stdio.asm'
 include 'compile.asm'
 
 	WORD p_program_version,'PROGRAM_VERSION',dostring
-	STRING 'RRQ Forth version 0.1 - 2021-05-13',10
+	STRING 'RRQ Forth version 0.1 - 2021-05-22',10
 
 	WORD p_stdin,'STDIN',dovalue
 	;; Initialised to hold a STREAM for fd 0
 	dq 0
 
-;;; The main entry point.
+	WORD p_args,'ARGS',dostring
+	;; Pointer to initial argument block
+	dq 0	   ; *(int argc,(char*[argc]) argv)
+
+	WORD p_lparen,'(',fasm,IMMEDIATE
+	pushr rsi
+p_lparen_loop:
+	DOFORTH  p_stdin, p_read_word
+	pop rax
+	pop rbx
+	cmp rax,0 ; end of stream
+	je p_lparen_exit
+	cmp rax,1
+	jne p_lparen_loop
+	push rbx
+	push qword ')'
+	push 1
+	DOFORTH p_strncmp
+	pop rax
+	cmp rax,0
+	jne p_lparen_loop
+p_lparen_exit:
+	popr rsi
+	next
+	
+;;; ******** The main entry point. ********
+main:	
+	;; Initial rsp points to the arguments block of size (64 bits)
+	;; followed by the argument pointers.
+	mov qword [p_args_DFA],rsp
+	jmp p_quit_DFA 		; QUIT
+
 ;;; This word is also the last word before syscalls
 last_forth_word:
 	WORD p_quit,'QUIT',fasm
 	;; QUIT is the program entry point ********************
-main:
+
 	mov rsp,DS_TOP
 	mov rbp,RS_TOP
 	cmp qword [p_stdin_DFA],0
@@ -226,8 +241,6 @@ p_quit_INITIALIZED:
 	dq p_program_version
 	dq p_tell
 	dq p_stdin
-	dq p_clear_stream
-	dq p_stdin
 	dq p_evaluate_stream
 	BRANCH 0,p_quit_ERROR
 	dq p_false
@@ -248,7 +261,7 @@ p_quit_ERROR:
 
 ;;; ========================================
 
-	segment readable writable
+	;segment readable writable
 	
 heap_start:
 	rb 1048576		; +1 Mb heap