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| author | user <user@clank> | 2026-07-17 20:22:34 +0200 |
|---|---|---|
| committer | user <user@clank> | 2026-07-17 20:22:34 +0200 |
| commit | bf647581fbad727ad22021d345d3955abf44c2f3 (patch) | |
| tree | 59e77e48c1e07dd181e2c0d693016847c441c662 /c | |
| parent | net: fix truncated TCP field offsets corrupting multi-segment recv (diff) | |
| download | gbos-bf647581fbad727ad22021d345d3955abf44c2f3.tar.gz gbos-bf647581fbad727ad22021d345d3955abf44c2f3.tar.xz gbos-bf647581fbad727ad22021d345d3955abf44c2f3.zip | |
net: SYS_POLLCON + larger console ring for link-injected input
Programs that own their main loop (the IRC client) need to poll for
typed input without blocking. pollin() only sees the on-screen keyboard;
bytes injected over the link (gbhub 'type', for scripted/hub-driven
sessions) land in the kernel console ring, previously only drained by the
blocking KGetc path. Add SYS_POLLCON: a non-blocking con_pop for
userland.
Also enlarge that console ring 16 -> 64. One net_pump drains an entire
serial burst into the ring at once, so a whole injected command line has
to fit or bytes are dropped and lines merge (a 20-char command came out
truncated and glued to the next). 64 covers a full line; mask stays a
power of two.
Diffstat (limited to 'c')
| -rw-r--r-- | c/gbos.h | 2 | ||||
| -rw-r--r-- | c/libc.s | 8 |
2 files changed, 9 insertions, 1 deletions
@@ -17,6 +17,8 @@ void ssend(unsigned char b); /* link-port: transmit one byte */ unsigned char srecv(void); /* link-port: receive one byte (blocks) */ int srecv_nb(void); /* link-port: receive, or -1 if none */ unsigned char pollin(void); /* poll OSK for a typed char, or 0 */ +unsigned char pollcon(void); /* poll console ring (link-injected + input, filled by net pumps), or 0 */ unsigned char sys_net(void *req); /* socket layer trap (see sock.h) */ void gsleep(unsigned char units); /* delay units*(1/64)s (raw trap) */ void msleep(unsigned int ms); /* delay ~ms milliseconds */ @@ -1,6 +1,6 @@ .module libc .globl _writes, _putc, _puts, _nl, _strlen, _readc, _sexit, _getpid, _getargs - .globl _open, _close, _fgetc, _fputc, _flist, _fremove, _pipe, _ssend, _srecv, _srecv_nb, _pollin + .globl _open, _close, _fgetc, _fputc, _flist, _fremove, _pipe, _ssend, _srecv, _srecv_nb, _pollin, _pollcon .globl _sys_net, _gsleep ;; SDCC sm83 sdcccall(1): 1st arg -> A (byte) or DE (pointer); ret A / BC. ;; rst $30 (the trap) clobbers BC/DE/HL; SDCC treats them caller-saved, so @@ -136,6 +136,12 @@ _pollin: rst #0x30 ret + ;; unsigned char pollcon(void) -> A (queued console byte, or 0) +_pollcon: + ld c, #35 ; SYS_POLLCON + rst #0x30 + ret + ;; unsigned char open(const char *name /*DE*/, unsigned char mode /*A*/) -> A(fd) _open: ld b, a ; B = mode |