umka_os: Load very basic userspace KolibriOS app

.gitignore

@@ -38,3 +38,4 @@ t.d
 *.exe
 colors.dtp
 .tup
+hello_board

apps/hello_board.asm

@@ -0,0 +1,23 @@
+use32
+    org 0
+    db  'MENUET01'
+    dd  1, start, i_end, e_end, e_end, 0, 0
+
+__DEBUG__ = 1
+__DEBUG_LEVEL__ = 1
+
+include 'proc32.inc'
+include 'macros.inc'
+include 'debug-fdo.inc'
+
+start:
+        DEBUGF 1, "Hello board\n"
+exit:
+        mcall   18, 9, 2
+        mcall   -1
+        mcall   -2      ; just to check it's unreachable
+
+include_debug_strings
+i_end:
+rb 0x100        ;stack
+e_end:

apps/makefile

@@ -0,0 +1,23 @@
+FASM_EXE ?= fasm
+FASM_FLAGS=-dUMKA=1
+
+ifeq ($(HOST),linux)
+        FASM_INCLUDE=$(KOLIBRIOS)/programs
+        FASM=INCLUDE="$(FASM_INCLUDE)" $(FASM_EXE) $(FASM_FLAGS)
+else ifeq ($(HOST),windows)
+        FASM_INCLUDE=$(KOLIBRIOS)\programs
+        FASM=set "INCLUDE=$(FASM_INCLUDE)" && $(FASM_EXE) $(FASM_FLAGS)
+else
+        $(error your OS is not supported)
+endif
+
+all: hello_board
+
+%: %.asm
+	$(FASM) $< $@
+
+
+.PHONY: all clean
+
+clean:
+	rm -f hello_board

linux/thread.c

@@ -2,6 +2,7 @@
 #define __USE_GNU
 #include <signal.h>
 #include <stddef.h>
+#include <stdlib.h>
 
 sigset_t mask;
 
@@ -12,6 +13,10 @@ void reset_procmask(void) {
 }
 
 int get_fake_if(ucontext_t *ctx) {
-    // we fake IF with id flag
+    // we fake IF with ID flag
     return !(ctx->uc_mcontext.__gregs[REG_EFL] & (1 << 21));
 }
+
+void system_shutdown() {
+    exit(0);
+}

makefile

@@ -7,7 +7,6 @@ ifndef HOST
 endif
 
 FASM_EXE ?= fasm
-FASM_INCLUDE=$(KOLIBRIOS)/kernel/trunk;$(KOLIBRIOS)/programs/develop/libraries/libcrash/hash
 FASM_FLAGS=-dUEFI=1 -dextended_primary_loader=1 -dUMKA=1 -dHOST=$(HOST) -m 2000000
 
 CC ?= gcc
@@ -78,7 +77,7 @@ umka_gen_devices_dat: umka_gen_devices_dat.o umka.o pci.o thread.o util.o
 umka.o umka.fas: umka.asm
 	$(FASM) $< umka.o -s umka.fas
 
-shell.o: shell.c
+shell.o: shell.c lodepng.h
 	$(CC) $(CFLAGS_32) -c $<
 
 thread.o: $(HOST)/thread.c
@@ -90,6 +89,9 @@ pci.o: $(HOST)/pci.c
 lodepng.o: lodepng.c lodepng.h
 	$(CC) $(CFLAGS_32) -c $<
 
+#bestline.o: bestline.c bestline.h
+#	$(CC) $(CFLAGS_32) -U_POSIX_C_SOURCE -Wno-logical-op -Wno-switch-enum -c $<
+
 getopt.o: getopt.c getopt.h
 	$(CC) $(CFLAGS_32) -c $<
 
@@ -136,7 +138,7 @@ umka_fuse.o: umka_fuse.c umka.h
 	$(CC) $(CFLAGS_32) `pkg-config fuse3 --cflags` -c $<
 
 umka_os.o: umka_os.c umka.h
-	$(CC) $(CFLAGS_32) -c $< -D_XOPEN_SOURCE=600
+	$(CC) $(CFLAGS_32) -c $<
 
 umka_gen_devices_dat.o: umka_gen_devices_dat.c umka.h
 	$(CC) $(CFLAGS_32) -c $<

shell.c

@@ -223,13 +223,9 @@ next_line(int is_tty, int block) {
         FD_SET(fileno(fin), &readfds);
         struct timeval timeout = {.tv_sec = 0, .tv_usec = 0};
         int sr = select(fileno(fin)+1, &readfds, NULL, NULL, &timeout);
+        cmd_buf[0] = '\0';
         if (sr > 0) {
             fgets(cmd_buf, FGETS_BUF_LEN, fin);
-            if (cmd_buf[0] == EOF) {
-                cmd_buf[0] = '\0';
-            }
-        } else {
-            cmd_buf[0] = '\0';
         }
         return 1;
     }

umka.asm

@@ -164,15 +164,17 @@ pubsym _display, 'kos_display'
 
 pubsym BOOT, 'kos_boot'
 
+EFLAGS.ID = 1 SHL 21
+
 macro cli {
         pushfd
-        bts     dword[esp], 21
+        bts     dword[esp], BSF EFLAGS.ID
         popfd
 }
 
 macro sti {
         pushfd
-        btr     dword[esp], 21
+        btr     dword[esp], BSF EFLAGS.ID
         popfd
 }
 
@@ -188,6 +190,9 @@ macro int n {
   end if
 }
 
+section '.app' executable writable align 64
+rb 64*1024
+
 section '.text' executable align 64
 
 coverage_begin:
@@ -286,7 +291,7 @@ include 'core/taskman.inc'
 include 'core/dll.inc'
 macro call target {
   if target eq pci_read_reg
-	call	_pci_read_reg
+        call    _pci_read_reg
   else
         call    target
   end if
@@ -603,7 +608,7 @@ proc umka_init c uses ebx esi edi ebp
         sub     [edx+APPDATA.saved_esp], 4
         mov     eax, [edx+APPDATA.saved_esp]
         mov     dword[eax], 0
-        xor     ecx, ecx
+        movi    ecx, MAX_PRIORITY
         call    scheduler_add_thread
 
         mov     [current_slot_idx], 2
@@ -720,7 +725,7 @@ proc irq0 c, _signo, _info, _context
 
         inc     [timer_ticks]
         call    updatecputimes
-        ccall   reset_procmask
+        ccall   reset_procmask          ; kind of irq_eoi:ta
         ccall   get_fake_if, [_context]
         test    eax, eax
         jnz     @f
@@ -760,6 +765,8 @@ proc map_io_mem _base, _size, _flags
         ret
 endp
 
+extrn system_shutdown
+
 sysfn_saveramdisk:
 sysfn_meminfo:
 check_fdd_motor_status:
@@ -767,7 +774,6 @@ check_ATAPI_device_event:
 check_fdd_motor_status_has_work?:
 check_ATAPI_device_event_has_work?:
 request_terminate:
-system_shutdown:
 terminate:
 LoadMedium:
 clear_CD_cache:

umka.ld

@@ -1,7 +1,23 @@
+/*
+MEMORY
+{
+  pew : ORIGIN = 0, LENGTH = 64K
+}
+
 SECTIONS
 {
-  . = ALIGN(65536);
+  .aou 0:
-  .data.aligned :
+  {
+    *(.app)
+  } : NONE
+
+}
+INSERT BEFORE .interp;
+*/
+
+SECTIONS
+{
+  .data.aligned BLOCK(65536) :
   {
     *(SORT_BY_NAME(.data.align*))
   }
@@ -11,8 +27,7 @@ INSERT AFTER .data;
 
 SECTIONS
 {
-  . = ALIGN(65536);
+  .bss.aligned BLOCK(65536) :
-  .bss.aligned :
   {
     *(SORT_BY_NAME(.bss.align*))
   }

umka_os.c

@@ -19,10 +19,12 @@
 
 #include <stdlib.h>
 #include <fcntl.h>
+#define __USE_GNU
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
+#define __USE_MISC
 #include <sys/mman.h>
 #include <sys/select.h>
 #include <sys/stat.h>
@@ -97,6 +99,43 @@ void new_monitor(void) {
 }
 */
 
+struct app_menuet {
+    char signature[8];      // MENUETXX
+    uint32_t    version;    // 1
+    void (*start) (void);   // start
+};
+
+int
+load_app(const char *fname, void *base) {
+    FILE *f = fopen(fname, "r");
+    if (!f) {
+        perror("Can't open app file");
+        exit(1);
+    }
+    fread(base, 1, 0x4000, f);
+    fclose(f);
+
+    for (size_t i = 0; i < 0x64; i++) {
+        fprintf(stderr, "%2.2hx ", ((uint8_t*)base)[i]);
+    }
+    fprintf(stderr, "\n");
+
+    return 0;
+}
+
+void handle_i40(int signo, siginfo_t *info, void *context) {
+    (void)signo;
+    (void)info;
+    ucontext_t *ctx = context;
+    void *ip = (void*)ctx->uc_mcontext.__gregs[REG_EIP];
+    int eax = ctx->uc_mcontext.__gregs[REG_EAX];
+    if (*(uint16_t*)ip == 0x40cd) {
+        ctx->uc_mcontext.__gregs[REG_EIP] += 2; // skip int 0x40
+    }
+    printf("i40: %i %p\n", eax, ip);
+    umka_i40((pushad_t*)(ctx->uc_mcontext.__gregs + REG_EDI));
+}
+
 int
 main() {
     if (coverage)
@@ -111,19 +150,29 @@ main() {
     sa.sa_flags = SA_SIGINFO;
 
     if (sigaction(SIGPROF, &sa, NULL) == -1) {
-        printf("Can't install signal handler!\n");
+        printf("Can't install SIGPROF handler!\n");
         return 1;
     }
 
-/*
+    sa.sa_sigaction = handle_i40;
-    void *app_base = mmap((void*)0x000000, 16*0x100000, PROT_READ | PROT_WRITE |
+    sigemptyset(&sa.sa_mask);
+    sa.sa_flags = SA_SIGINFO;
+
+    if (sigaction(SIGSEGV, &sa, NULL) == -1) {
+        printf("Can't install SIGSEGV handler!\n");
+        return 1;
+    }
+
+    void *app_base = mmap((void*)0, 16*0x100000, PROT_READ | PROT_WRITE |
                           PROT_EXEC, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS,
                           -1, 0);
     if (app_base == MAP_FAILED) {
         perror("mmap failed");
         exit(1);
     }
-*/
+
+    load_app("../apps/hello_board", app_base);
+
     printf("pid=%d, kos_lfb_base=%p\n", getpid(), (void*)kos_lfb_base);
 
     kos_boot.bpp = 32;
@@ -136,6 +185,7 @@ main() {
 
     thread_start(0, monitor, THREAD_STACK_SIZE);
     thread_start(0, umka_thread_net_drv, THREAD_STACK_SIZE);
+    thread_start(0, ((struct app_menuet*)app_base)->start, THREAD_STACK_SIZE);
 //    thread_start(0, umka_thread_ping, THREAD_STACK_SIZE);
 
     setitimer(ITIMER_PROF, &timeout, NULL);

umka_ping.c

@@ -84,6 +84,7 @@ int go_ping = 0;
 void
 umka_thread_ping(void) {
     umka_sti();
+    fprintf(stderr, "[ping] starting\n");
     while (!go_ping) { /* wait until initialized */ }
 
     f75ret_t r75;