added strlen, strncpy and realloc

[rrq/rrqforth.git] / stdio.asm

diff --git a/stdio.asm b/stdio.asm
index 865b7f0d6dcf462743d5284b197063e4d0953009..9cf7611606e2411832f2572d55b183deae0b1f90 100644 (file)
--- a/stdio.asm
+++ b/stdio.asm
@@ -2,9 +2,9 @@
 ;;; Dynamic memory management. Allocated with MALLOC and released with
 ;;; MUNMAP (see below)
 
-       ;; ( size -- addr )
-       ;; Allocates memory (using brk)
        WORD p_malloc,'MALLOC',fasm
+       ;; ( size -- addr )
+       ;; Allocates memory (using mmap)
        pushr rsi               ; pretend it's a FORTH word since it
                                ; ends via sys_mmap_asm
        pop rax
@@ -16,6 +16,15 @@
        push qword 0            ; offset
        jmp sys_mmap_asm        ; exit via sys_mmap
 
+       WORD p_realloc,'REALLOC',fasm
+       ;; ( addr old new -- )
+       ;; Try remapping a given MMAP region of old size to a new size
+       ;; mremap(void *old_address, size_t old_size,
+        ;;        size_t new_size, int flags, ... /* void *new_address */);
+       pushr rsi
+       push 1                  ; MREMAP_MAYMOVE
+       jmp sys_mmap_asm        ; exit via sys_mmap
+
 ;;; ========================================
 ;;; Input stream handling.
 ;;;