Index: head/sys/conf/Makefile.riscv =================================================================== --- head/sys/conf/Makefile.riscv +++ head/sys/conf/Makefile.riscv @@ -28,8 +28,17 @@ INCLUDES+= -I$S/contrib/libfdt +# Set the ELF LMA to the address that OpenSBI's fw_jump jumps to. This allows +# us to load the kernel with the -kernel flag in QEMU without having to embed +# it inside BBL or OpenSBI's fw_payload first. +# Note: For rv32 the start address is different (0x80400000). +# We set this value using --defsym rather than hardcoding it in ldscript.riscv +# so that different kernel configs can override the load address. +KERNEL_LMA?= 0x80200000 + SYSTEM_LD= @${LD} -N -m ${LD_EMULATION} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} \ --no-warn-mismatch --warn-common --export-dynamic \ + --defsym='kernel_lma=${KERNEL_LMA}' \ --dynamic-linker /red/herring \ -o ${.TARGET} -X ${SYSTEM_OBJS} vers.o Index: head/sys/conf/ldscript.riscv =================================================================== --- head/sys/conf/ldscript.riscv +++ head/sys/conf/ldscript.riscv @@ -7,7 +7,8 @@ { /* Read-only sections, merged into text segment: */ . = kernbase; - .text : AT(ADDR(.text) - kernbase) + /* The load address kernel_lma is set using --defsym= on the command line. */ + .text : AT(kernel_lma) { *(.text) *(.stub)