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| author | Keith Packard | 2021-01-08 23:42:52 +0100 |
|---|---|---|
| committer | Alex Bennée | 2021-01-18 11:05:06 +0100 |
| commit | a10b9d93ecea0a8f01eb6de56274b1bcb101083b (patch) | |
| tree | 24d8b952a691501fa22791881425539e33535d5a /qemu-options.hx | |
| parent | semihosting: Support SYS_HEAPINFO when env->boot_info is not set (diff) | |
| download | qemu-a10b9d93ecea0a8f01eb6de56274b1bcb101083b.tar.gz qemu-a10b9d93ecea0a8f01eb6de56274b1bcb101083b.tar.xz qemu-a10b9d93ecea0a8f01eb6de56274b1bcb101083b.zip | |
riscv: Add semihosting support
Adapt the arm semihosting support code for RISCV. This implementation
is based on the standard for RISC-V semihosting version 0.2 as
documented in
https://github.com/riscv/riscv-semihosting-spec/releases/tag/0.2
Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20210107170717.2098982-6-keithp@keithp.com>
Message-Id: <20210108224256.2321-17-alex.bennee@linaro.org>
Diffstat (limited to 'qemu-options.hx')
| -rw-r--r-- | qemu-options.hx | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/qemu-options.hx b/qemu-options.hx index 9dc90ffbfb..62791f56d8 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -4207,10 +4207,10 @@ ERST DEF("semihosting", 0, QEMU_OPTION_semihosting, "-semihosting semihosting mode\n", QEMU_ARCH_ARM | QEMU_ARCH_M68K | QEMU_ARCH_XTENSA | QEMU_ARCH_LM32 | - QEMU_ARCH_MIPS | QEMU_ARCH_NIOS2) + QEMU_ARCH_MIPS | QEMU_ARCH_NIOS2 | QEMU_ARCH_RISCV) SRST ``-semihosting`` - Enable semihosting mode (ARM, M68K, Xtensa, MIPS, Nios II only). + Enable semihosting mode (ARM, M68K, Xtensa, MIPS, Nios II, RISC-V only). Note that this allows guest direct access to the host filesystem, so should only be used with a trusted guest OS. @@ -4222,10 +4222,10 @@ DEF("semihosting-config", HAS_ARG, QEMU_OPTION_semihosting_config, "-semihosting-config [enable=on|off][,target=native|gdb|auto][,chardev=id][,arg=str[,...]]\n" \ " semihosting configuration\n", QEMU_ARCH_ARM | QEMU_ARCH_M68K | QEMU_ARCH_XTENSA | QEMU_ARCH_LM32 | -QEMU_ARCH_MIPS | QEMU_ARCH_NIOS2) +QEMU_ARCH_MIPS | QEMU_ARCH_NIOS2 | QEMU_ARCH_RISCV) SRST ``-semihosting-config [enable=on|off][,target=native|gdb|auto][,chardev=id][,arg=str[,...]]`` - Enable and configure semihosting (ARM, M68K, Xtensa, MIPS, Nios II + Enable and configure semihosting (ARM, M68K, Xtensa, MIPS, Nios II, RISC-V only). Note that this allows guest direct access to the host filesystem, so @@ -4240,6 +4240,8 @@ SRST open/read/write/seek/select. Tensilica baremetal libc for ISS and linux platform "sim" use this interface. + On RISC-V this implements the standard semihosting API, version 0.2. + ``target=native|gdb|auto`` Defines where the semihosting calls will be addressed, to QEMU (``native``) or to GDB (``gdb``). The default is ``auto``, which |