| /* |
| * Copyright 2014, NICTA |
| * |
| * This software may be distributed and modified according to the terms of |
| * the BSD 2-Clause license. Note that NO WARRANTY is provided. |
| * See "LICENSE_BSD2.txt" for details. |
| * |
| * @TAG(NICTA_BSD) |
| */ |
| #include <autoconf.h> |
| #include <sel4/types.h> |
| #include <sel4utils/thread.h> |
| #include <stdbool.h> |
| |
| #include "../../helpers.h" |
| |
| int |
| sel4utils_arch_init_context(void *entry_point, void *stack_top, seL4_UserContext *context) |
| { |
| context->esp = (seL4_Word) stack_top; |
| /* set edx to zero in case we are setting this when spawning a process as |
| * edx is the atexit parameter, which we currently do not use */ |
| context->edx = 0; |
| context->gs = IPCBUF_GDT_SELECTOR; |
| context->eip = (seL4_Word) entry_point; |
| |
| return 0; |
| } |
| |
| int |
| sel4utils_arch_init_context_with_args(void *entry_point, void *arg0, void *arg1, void *arg2, |
| bool local_stack, void *stack_top, seL4_UserContext *context, |
| vka_t *vka, vspace_t *local_vspace, vspace_t *remote_vspace) |
| { |
| |
| if (local_stack) { |
| seL4_Word *stack_ptr = (seL4_Word *) stack_top; |
| stack_ptr[-5] = (seL4_Word) arg0; |
| stack_ptr[-4] = (seL4_Word) arg1; |
| stack_ptr[-3] = (seL4_Word) arg2; |
| stack_top = (void *) ((uintptr_t) stack_top - 24u); |
| } else if (local_vspace && remote_vspace && vka) { |
| seL4_Word stack_args[6] = {0, (seL4_Word) arg0, (seL4_Word) arg1, (seL4_Word) arg2, 0, 0}; |
| int error = sel4utils_stack_write(local_vspace, remote_vspace, vka, stack_args, sizeof(stack_args), |
| (uintptr_t *) &stack_top); |
| if (error) { |
| return -1; |
| } |
| } |
| |
| return sel4utils_arch_init_context(entry_point, stack_top, context); |
| } |
| |
| |
