Makefile

@@ -3,7 +3,7 @@ CPPFLAGS = -MMD
 AS=nasm
 ASFLAGS += -f elf32
 LDFLAGS += -m elf_i386
-CFLAGS += -m32 -pipe -Wall -Wextra -Werror -ffreestanding -fno-exceptions -fno-pie -fno-stack-protector -fno-tree-vectorize -D__KERNEL__
+CFLAGS += -m32 -Wall -Wextra -Werror -ffreestanding -fno-exceptions -fno-pie -fno-stack-protector -fno-tree-vectorize -D__KERNEL__
 #keep .i and .s
 #CFLAGS += -save-temps
 #CFLAGS += -fanalyzer -Wno-analyzer-malloc-leak -Wno-analyzer-out-of-bounds

core/syscall.c

@@ -11,6 +11,7 @@
 #include "uaddrspace.h"
 #include "zero.h"
 
+
 int syscallExecute(int syscallId, const struct cpu_state *userCtx)
 {
 
@@ -145,17 +146,6 @@ int syscallExecute(int syscallId, const struct cpu_state *userCtx)
 
             break;
         }
-        case SYSCALL_ID_USLEEP: {
-            unsigned int sleep;
-
-            ret = syscallGet1arg(userCtx, &sleep);
-            if (ret)
-                break;
-
-            ret = threadUsleep(sleep);
-
-            break;
-        }
         default:
             printf("Unknon syscall id %d\n", syscallId);
             ret = -ENOENT;

core/syscall.h

@@ -12,7 +12,6 @@
 #define SYSCALL_ID_MMAP 7
 #define SYSCALL_ID_MUNMAP 8
 #define SYSCALL_ID_NEW_THREAD 9
-#define SYSCALL_ID_USLEEP 10
 
 #ifdef __KERNEL__
 int syscallExecute(int syscallId, const struct cpu_state *user_ctx);

core/thread.c

@@ -292,11 +292,6 @@ int threadYield()
 }
 
 int threadMsleep(unsigned long msec)
-{
-    return threadUsleep(msec*1000);
-}
-
-int threadUsleep(unsigned long usec)
 {
     uint32_t flags;
     struct thread *next, *current;
@@ -304,12 +299,12 @@ int threadUsleep(unsigned long usec)
     disable_IRQs(flags);
 
     current = currentThread;
-    assertmsg(current->state == RUNNING, "thread %s is in state %d for %lu us\n", current->name,
+    assertmsg(current->state == RUNNING, "thread %s is in state %d for %lu\n", current->name,
-              current->state, usec);
+              current->state, msec);
 
     current->state              = SLEEPING;
     current->sleepHaveTimeouted = 0;
-    current->jiffiesSleeping    = usecs_to_jiffies(usec);
+    current->jiffiesSleeping    = msecs_to_jiffies(msec);
     next                        = threadSelectNext();
 
     assert(next != current);

core/thread.h

@@ -83,7 +83,6 @@ int threadYield();
 int threadWait(struct thread *current, struct thread *next, unsigned long msec);
 int threadUnsched(struct thread *th);
 int threadMsleep(unsigned long msec);
-int threadUsleep(unsigned long usec);
 int threadOnJieffiesTick();
 struct thread *getCurrentThread();
 int threadAddThread(struct thread *th);

userspace/kernel/syscall.h

@@ -12,7 +12,6 @@
 #define SYSCALL_ID_MMAP 7
 #define SYSCALL_ID_MUNMAP 8
 #define SYSCALL_ID_NEW_THREAD 9
-#define SYSCALL_ID_USLEEP 10
 
 #ifdef __KERNEL__
 int syscallExecute(int syscallId, const struct cpu_state *user_ctx);

userspace/libc.c

@@ -5,7 +5,6 @@
 #include "swintr.h"
 #include "sys/mman.h"
 #include "syscall.h"
-#include "unistd.h"
 
 int errno = 0;
 int memcmp(const void *aptr, const void *bptr, size_t size)
@@ -766,7 +765,3 @@ int new_thread(start_routine *func, void *arg, size_t stackSize)
     return syscall4(SYSCALL_ID_NEW_THREAD, (unsigned int)thread_runner, (unsigned int)func,
                     (unsigned int)arg, stackSize);
 }
-
-int usleep(useconds_t usec) {
-    return syscall1(SYSCALL_ID_USLEEP, (unsigned int)usec);
-}

userspace/main_user.c

@@ -4,7 +4,6 @@
 #include "stddef.h"
 #include "sys/mman.h"
 #include "tiny.h"
-#include "unistd.h"
 
 int func_help()
 {
@@ -123,7 +122,6 @@ int func_munmap()
 static void *print_hello(void *arg) {
         (void)arg;
         printf("Hello World from thread\n");
-        usleep(100);
 
         return NULL;
 }

userspace/unistd.h

@@ -1,4 +0,0 @@
-#pragma once
-
-typedef unsigned int useconds_t;
-int usleep(useconds_t usec);