arch/riscv64/kernel/proc.c


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#include <apos/tcb.h>
#include <apos/elf.h>
#include <csr.h>

stat_t jump_to_userspace(struct tcb *t, int argc, char **argv)
{
	csr_write(CSR_SEPC, t->entry);
	__asm__ volatile("mv sp, %0\n" ::"r"(t->proc_stack_top) : "memory");
	__asm__ volatile("sret\n" ::: "memory");
	/* we should never reach this */
	return ERR_ADDR;
}

stat_t return_to_userspace(struct tcb *t)
{
	/* lol */
	return ERR_ADDR;
}