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X-Received-From: 2a00:1450:4864:20::342 Subject: [Qemu-devel] [RFC PATCH 02/11] semihosting: introduce CONFIG_SEMIHOSTING X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marek Vasut , Aleksandar Rikalo , Chris Wulff , Max Filippov , qemu-arm@nongnu.org, Aleksandar Markovic , Paolo Bonzini , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Aurelien Jarno Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) 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 Benn=C3=A9e Reviewed-by: Philippe Mathieu-Daud=C3=A9 Tested-by: Philippe Mathieu-Daud=C3=A9 --- 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 f23ecfd5c58..1f2e0e7fdeb 100644 --- a/default-configs/arm-softmmu.mak +++ b/default-configs/arm-softmmu.mak @@ -39,3 +39,4 @@ CONFIG_MICROBIT=3Dy CONFIG_FSL_IMX25=3Dy CONFIG_FSL_IMX7=3Dy CONFIG_FSL_IMX6UL=3Dy +CONFIG_SEMIHOSTING=3Dy diff --git a/default-configs/lm32-softmmu.mak b/default-configs/lm32-softmm= u.mak index 6d259665d60..115b3e34c98 100644 --- a/default-configs/lm32-softmmu.mak +++ b/default-configs/lm32-softmmu.mak @@ -4,6 +4,8 @@ # #CONFIG_MILKYMIST_TMU2=3Dn # disabling it actually causes compile-t= ime failures =20 +CONFIG_SEMIHOSTING=3Dy + # Boards: # CONFIG_LM32=3Dy diff --git a/default-configs/m68k-softmmu.mak b/default-configs/m68k-softmm= u.mak index e17495e2a0b..4049a8f2ba9 100644 --- a/default-configs/m68k-softmmu.mak +++ b/default-configs/m68k-softmmu.mak @@ -1,5 +1,7 @@ # Default configuration for m68k-softmmu =20 +CONFIG_SEMIHOSTING=3Dy + # Boards: # CONFIG_AN5206=3Dy diff --git a/default-configs/mips-softmmu-common.mak b/default-configs/mips= -softmmu-common.mak index 8e54a74b7a5..e10ac4b20c0 100644 --- a/default-configs/mips-softmmu-common.mak +++ b/default-configs/mips-softmmu-common.mak @@ -35,6 +35,7 @@ CONFIG_MIPS_CPS=3Dy CONFIG_MIPS_ITU=3Dy CONFIG_R4K=3Dy CONFIG_MALTA=3Dy +CONFIG_SEMIHOSTING=3Dy CONFIG_PCNET_PCI=3Dy CONFIG_MIPSSIM=3Dy CONFIG_ACPI_SMBUS=3Dy diff --git a/default-configs/nios2-softmmu.mak b/default-configs/nios2-soft= mmu.mak index e130d024e62..1bc4082ea99 100644 --- a/default-configs/nios2-softmmu.mak +++ b/default-configs/nios2-softmmu.mak @@ -1,5 +1,7 @@ # Default configuration for nios2-softmmu =20 +CONFIG_SEMIHOSTING=3Dy + # Boards: # CONFIG_NIOS2_10M50=3Dy diff --git a/default-configs/xtensa-softmmu.mak b/default-configs/xtensa-so= ftmmu.mak index 7e4d1cc0979..3aa20a47a7f 100644 --- a/default-configs/xtensa-softmmu.mak +++ b/default-configs/xtensa-softmmu.mak @@ -1,5 +1,7 @@ # Default configuration for Xtensa =20 +CONFIG_SEMIHOSTING=3Dy + # Boards: # CONFIG_XTENSA_SIM=3Dy diff --git a/hw/Kconfig b/hw/Kconfig index 88b9f150070..195f541e50c 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 00000000000..efe0a30734c --- /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 546954f4ff4..09c19bf19ed 100644 --- a/hw/semihosting/Makefile.objs +++ b/hw/semihosting/Makefile.objs @@ -1 +1 @@ -common-obj-$(CONFIG_SOFTMMU) +=3D config.o +obj-$(CONFIG_SEMIHOSTING) +=3D config.o diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs index 269dfa58326..e0d4f11b348 100644 --- a/stubs/Makefile.objs +++ b/stubs/Makefile.objs @@ -39,3 +39,4 @@ stub-obj-y +=3D xen-hvm.o stub-obj-y +=3D pci-host-piix.o stub-obj-y +=3D ram-block.o stub-obj-y +=3D ramfb.o +stub-obj-$(CONFIG_SOFTMMU) +=3D semihost.o diff --git a/stubs/semihost.c b/stubs/semihost.c new file mode 100644 index 00000000000..1a4e88e5326 --- /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 =3D { + .name =3D "", + .head =3D QTAILQ_HEAD_INITIALIZER(qemu_semihosting_config_opts.head), + .desc =3D { + { /* 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) +{ +} --=20 2.20.1