From 8c8680ad112f3ad1360aa5547392119ed4de6581 Mon Sep 17 00:00:00 2001 From: Michael Smith Date: Sat, 16 Jul 2022 16:37:25 +0100 Subject: Add keybind lookup code Also centralise NEXT_INSN macro, into its own header at least for now. --- src/bind.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 src/bind.c (limited to 'src/bind.c') diff --git a/src/bind.c b/src/bind.c new file mode 100644 index 0000000..62cdec3 --- /dev/null +++ b/src/bind.c @@ -0,0 +1,70 @@ +/* + * Copyright © 2022 Michael Smith + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH + * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, + * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR + * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +#include + +#include "con_.h" +#include "dbg.h" +#include "errmsg.h" +#include "hook.h" +#include "intdefs.h" +#include "mem.h" +#include "x86.h" +#include "x86util.h" + +struct keyinfo { + char *binding; + uchar keyuptgt : 3; + uchar pressed : 1; +}; +static struct keyinfo *keyinfo; // engine keybinds list (s_pKeyInfo[]) + +const char *bind_get(int keycode) { return keyinfo[keycode].binding; } + +static bool find_keyinfo(con_cmdcb klbc_cb) { +#ifdef _WIN32 + for (uchar *p = (uchar *)klbc_cb; p - (uchar *)klbc_cb < 32;) { + // key_listboundkeys command, in its loop through each possible index, + // does a mov from that index into a register, something like: + // mov , dword ptr [ * 8 + s_pKeyInfo] + if (p[0] == X86_MOVRMW && (p[1] & 0xC7) == 4 /* SIB + imm32 */ && + (p[2] & 0xC7) == 0xC5 /* [immediate + reg * 8] */) { + keyinfo = mem_loadptr(p + 3); + return true; + } + NEXT_INSN(p, "load from key binding list"); + } +#else +#warning TODO(linux): check whether linux is equivalent! +#endif + return false; +} + +bool bind_init(void) { + struct con_cmd *cmd_key_listboundkeys = con_findcmd("key_listboundkeys"); + if (!cmd_key_listboundkeys) { + errmsg_errorx("couldn't find key_listboundkeys command"); + return false; + } + con_cmdcb cb = con_getcmdcb(cmd_key_listboundkeys); + if (!find_keyinfo(cb)) { + errmsg_warnx("couldn't find key binding list"); + return false; + } + return true; +} + +// vi: sw=4 ts=4 noet tw=80 cc=80 -- cgit v1.2.3