hw.c

extern void printm(char *, ...);

void main(void) {
	printm("Hello world!\n");
	printm("Your name is %s\n", "unassigned");
}

hw.ld

OUTPUT_FORMAT(binary)
SECTIONS
{
	. = 0x0000000000020000;
	.data :
	{
		*(.data);
		*(.rodata);
		*(.bss);
	}

	. = 0xFF00000000000000;
	.text :
	{
		*(.text);
	}
}

Shell command.md

$ /opt/riscv/bin/riscv64-unknown-elf-gcc -O3 -c -o hw.o hw.c
$ /opt/riscv/bin/riscv64-unknown-elf-ld -b binary -T k.ld hw.o -o hw.bin --nostdlib

NOTE: The -b binary flag is required or else the command seg-faults.

Sorry; k.ld should read hw.ld.

I'm not sure what the goal is here, but it looks like our toolchain matches upstream

palmer.dabbelt a2 falvo-binary-linker $ make
riscv64-unknown-linux-gnu-gcc -O3 -c -o hw-riscv.o hw.c
gcc -O3 -c -o hw-x86.o hw.c
riscv64-unknown-linux-gnu-ld -b binary -T hw.ld hw-riscv.o -o hw-riscv.bin --nostdlib
ld -b binary -T hw.ld hw-x86.o -o hw-x86.bin --nostdlib
palmer.dabbelt a2 falvo-binary-linker $ file *.bin
hw-riscv.bin: ELF 64-bit LSB  relocatable, version 1 (SYSV), not stripped
hw-x86.bin:   ELF 64-bit LSB  relocatable, x86-64, version 1 (SYSV), not stripped

what were you expecting?