From e524e0a397efe3424cffe6e9d75be5dcf589b685 Mon Sep 17 00:00:00 2001 From: Nick Brassel Date: Mon, 18 Jan 2021 04:45:21 +1100 Subject: [PATCH] Add syscall fallbacks to ChibiOS builds (#11573) * Add fallback syscalls to ChibiOS builds that are present but able to be overridden as appropriate. * Modified location to be ChibiOS-specific. --- tmk_core/chibios.mk | 3 +- tmk_core/common/chibios/syscall-fallbacks.c | 91 +++++++++++++++++++++ 2 files changed, 93 insertions(+), 1 deletion(-) create mode 100644 tmk_core/common/chibios/syscall-fallbacks.c diff --git a/tmk_core/chibios.mk b/tmk_core/chibios.mk index 733f2d60fe..e94e935ebb 100644 --- a/tmk_core/chibios.mk +++ b/tmk_core/chibios.mk @@ -204,7 +204,8 @@ CHIBISRC = $(STARTUPSRC) \ $(PLATFORMSRC) \ $(BOARDSRC) \ $(STREAMSSRC) \ - $(CHIBIOS)/os/various/syscalls.c + $(CHIBIOS)/os/various/syscalls.c \ + $(PLATFORM_COMMON_DIR)/syscall-fallbacks.c # Ensure the ASM files are not subjected to LTO -- it'll strip out interrupt handlers otherwise. QUANTUM_LIB_SRC += $(STARTUPASM) $(PORTASM) $(OSALASM) $(PLATFORMASM) diff --git a/tmk_core/common/chibios/syscall-fallbacks.c b/tmk_core/common/chibios/syscall-fallbacks.c new file mode 100644 index 0000000000..5d232a755d --- /dev/null +++ b/tmk_core/common/chibios/syscall-fallbacks.c @@ -0,0 +1,91 @@ +/* Copyright 2021 Nick Brassel, QMK + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include +#include + +#pragma GCC diagnostic ignored "-Wmissing-prototypes" + +__attribute__((weak, used)) int _read_r(struct _reent *r, int file, char *ptr, int len) { + (void)r; + (void)file; + (void)ptr; + (void)len; + return -1; +} + +__attribute__((weak, used)) int _lseek_r(struct _reent *r, int file, int ptr, int dir) { + (void)r; + (void)file; + (void)ptr; + (void)dir; + return 0; +} + +__attribute__((weak, used)) int _write_r(struct _reent *r, int file, char *ptr, int len) { + (void)r; + (void)file; + (void)ptr; + return len; +} + +__attribute__((weak, used)) int _close_r(struct _reent *r, int file) { + (void)r; + (void)file; + return 0; +} + +__attribute__((weak, used)) caddr_t _sbrk_r(struct _reent *r, int incr) { + (void)r; + (void)incr; + return (caddr_t)-1; +} + +__attribute__((weak, used)) int _fstat_r(struct _reent *r, int file, struct stat *st) { + (void)r; + (void)file; + (void)st; + return 0; +} + +__attribute__((weak, used)) int _isatty_r(struct _reent *r, int fd) { + (void)r; + (void)fd; + return 1; +} + +__attribute__((weak, used)) void _fini(void) { return; } + +__attribute__((weak, used)) pid_t _getpid(void) { return 1; } + +__attribute__((weak, noreturn)) void _exit(int i) { + (void)i; + while (1) + ; +} + +__attribute__((weak)) void _kill(void) {} + +__attribute__((weak)) void *__dso_handle; + +void __cxa_pure_virtual(void); + +__attribute__((weak)) void __cxa_pure_virtual() { + while (1) + ; +} + +#pragma GCC diagnostic pop