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| author | Tom Hughes <tomhughes@chromium.org> | 2022-10-03 11:32:07 -0700 |
|---|---|---|
| committer | Chromeos LUCI <chromeos-scoped@luci-project-accounts.iam.gserviceaccount.com> | 2022-10-14 17:01:58 +0000 |
| commit | 45ab4673cb6e7aa589d72f3f3700f7ed74a59e8d (patch) | |
| tree | 0a70b80c64778887cf063a6bcfa662392c34c0c8 | |
| parent | 6003975a719df8440fb8da8ff7270eb6a3edc412 (diff) | |
| download | chrome-ec-45ab4673cb6e7aa589d72f3f3700f7ed74a59e8d.tar.gz | |
libc: Implement _exit(), which is needed by libc
_exit() is called by libc functions such as abort() or exit(). This
implementation replaces the one from newlib's libnosys.
BRANCH=none
BUG=b:234181908
TEST=make buildall
Signed-off-by: Tom Hughes <tomhughes@chromium.org>
Change-Id: I1d8f65fa206b3544a2772f38be854ee905532ad3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3933256
Reviewed-by: Andrea Grandi <agrandi@google.com>
| -rw-r--r-- | Makefile | 6 | ||||
| -rw-r--r-- | include/software_panic.h | 1 | ||||
| -rw-r--r-- | libc/build.mk | 5 | ||||
| -rw-r--r-- | libc/syscalls.c | 29 |
4 files changed, 41 insertions, 0 deletions
@@ -268,6 +268,8 @@ include $(BDIR)/build.mk endif ifeq ($(USE_BUILTIN_STDLIB), 1) include builtin/build.mk +else +include libc/build.mk endif include chip/$(CHIP)/build.mk include core/$(CORE)/build.mk @@ -310,6 +312,8 @@ endif all-obj-$(1)+=$(call objs_from_dir_p,common,common,$(1)) ifeq ($(USE_BUILTIN_STDLIB), 1) all-obj-$(1)+=$(call objs_from_dir_p,builtin,builtin,$(1)) +else +all-obj-$(1)+=$(call objs_from_dir_p,libc,libc,$(1)) endif all-obj-$(1)+=$(call objs_from_dir_p,driver,driver,$(1)) all-obj-$(1)+=$(call objs_from_dir_p,power,power,$(1)) @@ -364,6 +368,8 @@ dirs+=$(shell find common -type d) dirs+=$(shell find driver -type d) ifeq ($(USE_BUILTIN_STDLIB), 1) dirs+=builtin +else +dirs+=libc endif common_dirs=util diff --git a/include/software_panic.h b/include/software_panic.h index d5eb8685b3..ad17e2ea5d 100644 --- a/include/software_panic.h +++ b/include/software_panic.h @@ -22,6 +22,7 @@ #define PANIC_SW_WATCHDOG (PANIC_SW_BASE + 4) #define PANIC_SW_BAD_RNG (PANIC_SW_BASE + 5) #define PANIC_SW_PMIC_FAULT (PANIC_SW_BASE + 6) +#define PANIC_SW_EXIT (PANIC_SW_BASE + 7) #ifndef __ASSEMBLER__ extern const char *const panic_sw_reasons[]; diff --git a/libc/build.mk b/libc/build.mk new file mode 100644 index 0000000000..594f3061d6 --- /dev/null +++ b/libc/build.mk @@ -0,0 +1,5 @@ +# Copyright 2022 The ChromiumOS Authors +# Use of this source code is governed by a BSD-style license that can be +# found in the LICENSE file. + +libc-y=syscalls.o diff --git a/libc/syscalls.c b/libc/syscalls.c new file mode 100644 index 0000000000..9c683a2732 --- /dev/null +++ b/libc/syscalls.c @@ -0,0 +1,29 @@ +/* Copyright 2022 The ChromiumOS Authors + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/** + *@brief Provides implementations of syscalls needed by libc. The newlib + * documentation provides a list of the required syscalls: + * https://sourceware.org/newlib/libc.html#Syscalls and minimal implementations + * can be found in newlib's "nosys" library: + * https://sourceware.org/git/?p=newlib-cygwin.git;a=tree;f=libgloss/libnosys. + */ + +#include "panic.h" +#include "software_panic.h" +#include "task.h" + +/** + * Reboot the system. + * + * This function is called from libc functions such as abort() or exit(). + * + * @param rc exit code + */ +void _exit(int rc) +{ + panic_printf("%s called with rc: %d\n", __func__, rc); + software_panic(PANIC_SW_EXIT, task_get_current()); +} |