diff options
| author | kitty <nepeta@canaglie.net> | 2026-02-24 19:11:46 +1100 |
|---|---|---|
| committer | kitty <nepeta@canaglie.net> | 2026-02-24 19:11:46 +1100 |
| commit | 7f577ebad6f135e2169c25deb8f3ca7bf91a9e50 (patch) | |
| tree | 01e5f91292ae23ee6ab3aded3240b57b4cdc5918 /jefs.s | |
| parent | cb16fdb58dbe98c49831a596d332defc2740c051 (diff) | |
error handling?
Diffstat (limited to 'jefs.s')
| -rw-r--r-- | jefs.s | 29 |
1 files changed, 28 insertions, 1 deletions
@@ -6,9 +6,18 @@ mov qword [r14], %1 %endmacro +; this feels like Too much code and probably Too slow to have for every pspop. +; we'll see +; clobbers r8 (which isn't actually used anywhere here) %macro pspop 1 mov %1, qword [r14] lea r14, [r14+8] + cmp r14, wstack + jle %%ok + mov qword [error], 1 + mov r8, qword [handler] + call r8 + %%ok: %endmacro ;;; dictionary macros {{{ @@ -62,7 +71,7 @@ section .bss exec wstack_b: resq 2047 -wstack: resq 1 +wstack: resq 2 umem: resb 0x9c400 umem_e: @@ -174,11 +183,13 @@ defword "c,", c_comma, 0 ret defword "cmove", _cmove, 0 ; ( a1 a2 u -- ) + call heredump pspop rcx pspop rdi pspop rsi rep movsb + call heredump ret defword "cmove,", _cmove_comma, 0 ; ( c-addr u -- ) @@ -242,6 +253,8 @@ defword "parse", parse, 0 pspush r11 ; u ret +; segfault issue is in here i think? +; on second go around only one value is returned? defword "cparse", cparse, 0 pspop r15 ; c mov r13, qword [to_in] @@ -1023,6 +1036,18 @@ defword "0branch", zerobranch, 0 mov qword [here], r12 ret +; rudimentary error handler +; this word may be called when the stack is fucked, +; so instead we take the error from a variable called error. +; this word is intended to be called as an xt from the HANDLER variable, +; so better error handling can be given from forth. +defword "(handler)", brac_handler, 0 + mov r11, [error] + mov rdi, r11 + mov rax, __NR_exit + syscall + ret + ; TEMPORARY HORRIBLE DEBUGGING BULLSHIT {{{ ; debugging word; outputs raw bytes so needs to be piped through `x(x)d` ; terrible and awful @@ -1100,6 +1125,8 @@ defvar "s0", s0, 0, wstack defvar "h0", h0, 0, umem ; beginning of user memory area defvar "hend", hend, 0, umem_e ; ending of user memory area defvar "base", base, 0, 10 +defvar "error", error, 0, 0 +defvar "handler", handler, 0, brac_handler defvar "latest", latest, 0, lfa_latest initfile: |