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some fixes for ipc

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This commit is contained in:
Eggert Jung
2026-02-24 22:42:41 +01:00
parent e3452cf051
commit a35cc22990
2 changed files with 20 additions and 13 deletions
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11
kernel/syscall/skeleton.cc
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@@ -291,7 +291,7 @@ bool copy_from_phys(Vault& vault, uintptr_t phys_ptr, void* virt_ptr, size_t siz
size_t offset = Page::offset(phys_ptr);
size_t total_size = size + offset;
four_lvl_paging_t* search_table = vault.scheduler.active()->paging_tree;
four_lvl_paging_t* search_table = vault.scheduler.active()->paging_tree;
void* virt_addr = getFreeVirtSpace(search_table, (total_size/4096)+1); // page aligned pointer
if (virt_addr == nullptr) {
@@ -303,7 +303,7 @@ bool copy_from_phys(Vault& vault, uintptr_t phys_ptr, void* virt_ptr, size_t siz
}
memcpy(virt_ptr, (void*)((uintptr_t)(virt_addr)+ (uintptr_t)offset), size);
PageFrameAllocator::free((uintptr_t)(virt_addr));
setMapping((uintptr_t)(virt_addr), 0, search_table);
return true;
}
@@ -357,8 +357,9 @@ int receive(Vault& v, void* buffer, size_t size) {
IpcStruct* ipc = thread->ipc_queue.first();
if (ipc == nullptr) return -1;
size_t copy_len = (size < ipc->size) ? size:ipc->size;
// Buffer holen
if (!copy_from_phys(v, ipc->ptr, buffer, size)) {
if (!copy_from_phys(v, ipc->ptr, buffer, copy_len)) {
return -3;
}
@@ -370,6 +371,10 @@ bool reply(Vault& v, const void* buffer, size_t size) {
Thread* current_thread = v.scheduler.active();
IpcStruct* ipc = current_thread->ipc_queue.dequeue();
//noting to reply to
if(!ipc)
return false;
// if (!ipc || ipc->pid < 0 || static_cast<size_t>(ipc->pid) >= v.thread_count) return false;
Thread* other_thread = v.thread_list[ipc->pid];

22
user/app1/appl.cc
View File

@@ -46,22 +46,24 @@ extern "C" void main() {
//sys_test(1,2,3,4,5);
unsigned id = sys_getpid();
char text[] = "appX";
char text[] = "appX ";
text[3] = 0x30+id;
write(1, text, sizeof(text), 0, (int)id);
uint8_t cnt = 0;
for (unsigned i = 1;; ++i) {
if(id == 2){
send(4, text, strlen(text), text, 5);
write(1, text, strlen(text), 25, (int)id);
}
if(id == 4){
char blubb[10];
receive(blubb, 10);
write(1, blubb, strlen(blubb), 25, (int)id);
reply("toast", 5);
if(i%10 == 0){
if(id == 2){
send(4, text, strlen(text), text, 5);
write(1, text, strlen(text), 25, (int)id);
}
if(id == 4){
char blubb[10];
receive(blubb, 10);
write(1, blubb, strlen(blubb), 25, (int)id);
reply("toast", 5);
}
}
//counter to see app running