dinosauriel/aos
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

spawn: Map dispatcher into child

Browse Source
This commit is contained in:
Jan Schär 2022-03-23 10:31:13 +01:00
parent c62530f230
commit 3f60fdbb72
2 changed files with 13 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
errors/errno.fugu
View File

@ -577,6 +577,7 @@ errors spawn SPAWN_ERR_ {
failure UNKNOWN_TARGET_ARCH "Unknown target architecture type",
failure UNSUPPORTED_TARGET_ARCH "Unsupported target architecture type",
failure OUT_OF_PIDS "Failure allocating a pid",
failure PAGING_INIT "Failure initializing child paging state",
failure SETUP_CSPACE "Failure in spawn_setup_cspace",
failure DETERMINE_CPUTYPE "Failure in spawn_determine_cputype",

17
lib/spawn/spawn.c
View File

@ -212,7 +212,8 @@ errval_t spawn_load_argv(int argc, char *argv[], struct spawninfo *si,
// rueegges: initialize the foreign paging state
struct paging_state child_paging_state;
// 64 * 1024 is enough to catch null pointers and also enough to not conflict with child starting paging_alloc at VADDR_OFFSET
paging_init_state_foreign(&child_paging_state, 64 * 1024, si->vspace_cap_l0_pagetable, get_default_slot_allocator());
err = paging_init_state_foreign(&child_paging_state, 64 * 1024, si->vspace_cap_l0_pagetable, get_default_slot_allocator());
if (err_is_fail(err)) return err_push(err, SPAWN_ERR_PAGING_INIT);
// - Load the ELF binary
struct allocate_state st = {
@ -240,7 +241,15 @@ errval_t spawn_load_argv(int argc, char *argv[], struct spawninfo *si,
get_current_paging_state(), (void **)&handle,
DISPATCHER_FRAME_SIZE, si->cspace_cap_dispframe, VREGION_FLAGS_READ_WRITE
);
if (err_is_fail(err)) return err;
if (err_is_fail(err)) return err_push(err, SPAWN_ERR_MAP_DISPATCHER_TO_SELF);
dispatcher_handle_t handle_child;
err = paging_map_frame_attr(
&child_paging_state, (void **)&handle_child,
DISPATCHER_FRAME_SIZE, si->cspace_cap_dispframe, VREGION_FLAGS_READ_WRITE
);
if (err_is_fail(err)) return err_push(err, SPAWN_ERR_MAP_DISPATCHER_TO_NEW);
struct dispatcher_shared_generic *disp =
get_dispatcher_shared_generic(handle);
@ -256,7 +265,7 @@ errval_t spawn_load_argv(int argc, char *argv[], struct spawninfo *si,
// core id of the process
disp_gen->core_id = disp_get_core_id();
// Virtual address of the dispatcher frame in child's VSpace
disp->udisp = 0; // TODO
disp->udisp = handle_child;
// Start in disabled mode
disp->disabled = 1;
// A name (for debugging)
@ -274,8 +283,6 @@ errval_t spawn_load_argv(int argc, char *argv[], struct spawninfo *si,
disp_gen->eh_frame_hdr = 0;
disp_gen->eh_frame_hdr_size = 0;
// TODO: Map dispatcher frame into child address space
// - Setup the environment
// TODO