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Diffstat (limited to '')
| -rw-r--r-- | kernel/user.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/kernel/user.c b/kernel/user.c index fc1167d..f9b541c 100644 --- a/kernel/user.c +++ b/kernel/user.c @@ -230,6 +230,37 @@ fail: return 1; } +struct pcb *user_clone(struct pcb *pcb) +{ + struct pcb *child; + + if (pcb_alloc(&child)) + return NULL; + + // copy context + memcpy(&child->regs, &pcb->regs, sizeof(struct cpu_regs)); + child->memctx = mem_ctx_clone(pcb->memctx, true); + if (child->memctx == NULL) + return NULL; + + // set metadata + child->parent = pcb; + child->state = PROC_STATE_READY; + child->priority = pcb->priority; + child->ticks = 0; + + // copy heap + child->heap_start = pcb->heap_start; + child->heap_len = pcb->heap_len; + + // copy elf data + memcpy(&child->elf_header, &pcb->elf_header, sizeof(Elf64_Ehdr)); + memcpy(&child->elf_segments, &pcb->elf_segments, sizeof(Elf64_Ehdr)); + child->n_elf_segments = pcb->n_elf_segments; + + return child; +} + void user_cleanup(struct pcb *pcb) { if (pcb == NULL) |