From 16932bb761e52c2ca9397b57af5bdc5bdc5ae6a4 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Alex=20Benn=C3=A9e?= Date: Mon, 13 May 2019 15:25:27 +0100 Subject: [PATCH] semihosting: introduce CONFIG_SEMIHOSTING MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit There isn't much point building semihosting for platforms that don't support it. Introduce a new symbol and enable it only for the softmmu targets that need it. Signed-off-by: Alex Bennée Reviewed-by: Philippe Mathieu-Daudé Tested-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson --- default-configs/arm-softmmu.mak | 1 + default-configs/lm32-softmmu.mak | 2 + default-configs/m68k-softmmu.mak | 2 + default-configs/mips-softmmu-common.mak | 1 + default-configs/nios2-softmmu.mak | 2 + default-configs/xtensa-softmmu.mak | 2 + hw/Kconfig | 1 + hw/semihosting/Kconfig | 3 ++ hw/semihosting/Makefile.objs | 2 +- stubs/Makefile.objs | 1 + stubs/semihost.c | 66 +++++++++++++++++++++++++++++++++ 11 files changed, 82 insertions(+), 1 deletion(-) create mode 100644 hw/semihosting/Kconfig create mode 100644 stubs/semihost.c diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak index f23ecfd5c5..1f2e0e7fde 100644 --- a/default-configs/arm-softmmu.mak +++ b/default-configs/arm-softmmu.mak @@ -39,3 +39,4 @@ CONFIG_MICROBIT=y CONFIG_FSL_IMX25=y CONFIG_FSL_IMX7=y CONFIG_FSL_IMX6UL=y +CONFIG_SEMIHOSTING=y diff --git a/default-configs/lm32-softmmu.mak b/default-configs/lm32-softmmu.mak index 6d259665d6..115b3e34c9 100644 --- a/default-configs/lm32-softmmu.mak +++ b/default-configs/lm32-softmmu.mak @@ -4,6 +4,8 @@ # #CONFIG_MILKYMIST_TMU2=n # disabling it actually causes compile-time failures +CONFIG_SEMIHOSTING=y + # Boards: # CONFIG_LM32=y diff --git a/default-configs/m68k-softmmu.mak b/default-configs/m68k-softmmu.mak index e17495e2a0..4049a8f2ba 100644 --- a/default-configs/m68k-softmmu.mak +++ b/default-configs/m68k-softmmu.mak @@ -1,5 +1,7 @@ # Default configuration for m68k-softmmu +CONFIG_SEMIHOSTING=y + # Boards: # CONFIG_AN5206=y diff --git a/default-configs/mips-softmmu-common.mak b/default-configs/mips-softmmu-common.mak index 8e54a74b7a..e10ac4b20c 100644 --- a/default-configs/mips-softmmu-common.mak +++ b/default-configs/mips-softmmu-common.mak @@ -35,6 +35,7 @@ CONFIG_MIPS_CPS=y CONFIG_MIPS_ITU=y CONFIG_R4K=y CONFIG_MALTA=y +CONFIG_SEMIHOSTING=y CONFIG_PCNET_PCI=y CONFIG_MIPSSIM=y CONFIG_ACPI_SMBUS=y diff --git a/default-configs/nios2-softmmu.mak b/default-configs/nios2-softmmu.mak index e130d024e6..1bc4082ea9 100644 --- a/default-configs/nios2-softmmu.mak +++ b/default-configs/nios2-softmmu.mak @@ -1,5 +1,7 @@ # Default configuration for nios2-softmmu +CONFIG_SEMIHOSTING=y + # Boards: # CONFIG_NIOS2_10M50=y diff --git a/default-configs/xtensa-softmmu.mak b/default-configs/xtensa-softmmu.mak index 7e4d1cc097..3aa20a47a7 100644 --- a/default-configs/xtensa-softmmu.mak +++ b/default-configs/xtensa-softmmu.mak @@ -1,5 +1,7 @@ # Default configuration for Xtensa +CONFIG_SEMIHOSTING=y + # Boards: # CONFIG_XTENSA_SIM=y diff --git a/hw/Kconfig b/hw/Kconfig index 88b9f15007..195f541e50 100644 --- a/hw/Kconfig +++ b/hw/Kconfig @@ -29,6 +29,7 @@ source pci/Kconfig source rdma/Kconfig source scsi/Kconfig source sd/Kconfig +source semihosting/Kconfig source smbios/Kconfig source ssi/Kconfig source timer/Kconfig diff --git a/hw/semihosting/Kconfig b/hw/semihosting/Kconfig new file mode 100644 index 0000000000..efe0a30734 --- /dev/null +++ b/hw/semihosting/Kconfig @@ -0,0 +1,3 @@ + +config SEMIHOSTING + bool diff --git a/hw/semihosting/Makefile.objs b/hw/semihosting/Makefile.objs index 546954f4ff..09c19bf19e 100644 --- a/hw/semihosting/Makefile.objs +++ b/hw/semihosting/Makefile.objs @@ -1 +1 @@ -common-obj-$(CONFIG_SOFTMMU) += config.o +obj-$(CONFIG_SEMIHOSTING) += config.o diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs index 73452ad265..9c7393b08c 100644 --- a/stubs/Makefile.objs +++ b/stubs/Makefile.objs @@ -40,3 +40,4 @@ stub-obj-y += pci-host-piix.o stub-obj-y += ram-block.o stub-obj-y += ramfb.o stub-obj-y += fw_cfg.o +stub-obj-$(CONFIG_SOFTMMU) += semihost.o diff --git a/stubs/semihost.c b/stubs/semihost.c new file mode 100644 index 0000000000..1a4e88e532 --- /dev/null +++ b/stubs/semihost.c @@ -0,0 +1,66 @@ +/* + * Semihosting Stubs for SoftMMU + * + * Copyright (c) 2019 Linaro Ltd + * + * Stubs for SoftMMU targets that don't actually do semihosting. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "qemu/osdep.h" +#include "qemu/option.h" +#include "qemu/error-report.h" +#include "hw/semihosting/semihost.h" + +/* Empty config */ +QemuOptsList qemu_semihosting_config_opts = { + .name = "", + .head = QTAILQ_HEAD_INITIALIZER(qemu_semihosting_config_opts.head), + .desc = { + { /* end of list */ } + }, +}; + +/* Queries to config status default to off */ +bool semihosting_enabled(void) +{ + return false; +} + +SemihostingTarget semihosting_get_target(void) +{ + return SEMIHOSTING_TARGET_AUTO; +} + +/* + * All the rest are empty subs. We could g_assert_not_reached() but + * that adds extra weight to the final binary. Waste not want not. + */ +void qemu_semihosting_enable(void) +{ +} + +int qemu_semihosting_config_options(const char *optarg) +{ + return 1; +} + +const char *semihosting_get_arg(int i) +{ + return NULL; +} + +int semihosting_get_argc(void) +{ + return 0; +} + +const char *semihosting_get_cmdline(void) +{ + return NULL; +} + +void semihosting_arg_fallback(const char *file, const char *cmd) +{ +} -- 2.11.0