libc库增加tiny模式，最小体积更小

configs/STM32F103ZET6_defconfig

@@ -110,4 +110,4 @@ CONFIG_RT_USING_PIN=y
 CONFIG_CPU_TYPE="stm32f1"
 CONFIG_RTT_DIR="./"
 CONFIG_ARCH="cortex-m3"
-CONFIG_KNL_EXRAM=y
+CONFIG_KNL_EXRAM=n

mkrtos_user/lib/mlibc/CMakeLists.txt

@@ -14,12 +14,14 @@ crt/*.S
 crt/*.s)
 list(REMOVE_ITEM deps ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/mlibc/crt/start_init.S)
 list(REMOVE_ITEM deps ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/mlibc/crt/start.S)
+list(REMOVE_ITEM deps ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/mlibc/crt/start_tiny.S)
 list(REMOVE_ITEM deps ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/mlibc/ldso/dlstart.c)
 list(REMOVE_ITEM deps ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/mlibc/ldso/dynlink.c)
 list(REMOVE_ITEM deps ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/mlibc/crt/rcrt1.c)
 
 add_library(start_init ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/mlibc/crt/start_init.S)
 add_library(start ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/mlibc/crt/start.S)
+add_library(start_tiny ${CMAKE_SOURCE_DIR}/mkrtos_user/lib/mlibc/crt/start_tiny.S)
 
 add_library(muslc ${deps})
 target_link_libraries(

mkrtos_user/lib/mlibc/crt/crt1_tiny.c

@@ -0,0 +1,21 @@
+#include <features.h>
+#include "libc.h"
+
+#define START "_start"
+
+// #include "crt_arch.h"
+
+int main();
+weak void _init();
+weak void _fini();
+int __libc_start_main_tiny(int (*main)(int, char **, char **), int argc, char **argv,
+						   void (*init_dummy)(), void (*fini_dummy)());
+extern void *app_start_addr;
+void _start_tiny_init(long *p, void *start_addr)
+{
+	int argc = p[0];
+	char **argv = (void *)(p + 1);
+
+	app_start_addr = start_addr; // ATShining add.
+	__libc_start_main_tiny(main, argc, argv, _init, _fini);
+}

mkrtos_user/lib/mlibc/crt/start_tiny.S

@@ -0,0 +1,61 @@
+    .syntax unified
+    .section .first
+    
+    .globl reloc
+
+    .align 2
+    .globl    _start_
+    .type    _start_, %function
+_start_:
+    /*save r0 */
+    mov     r12, r0
+    b       __start
+    .SPACE   32 - (. -  _start_)
+_head_start:
+    .ascii  "MKRTOS. "
+    .word   __ram_size__
+heap_offset:     .word     __heap_start__ - _start_
+stack_offset:    .word     __stack_start__ - _start_
+heap_size:       .word     __heap_size__
+stack_size:      .word     __stack_size__
+data_offset:     .word     __data_start__ - _start_
+
+    .word   __bss_start__ - _start_
+got_start:    	.word    	__got_start__
+got_end:       	.word     	__got_end__
+rel_start:      .word     	__rel_start__
+rel_end:     .word    __rel_end__
+text_start: .word __text_start__
+    .SPACE   128 - (. -  _start_)
+
+    .align
+__start:
+
+    movs    r1, #0
+    adr     r2, _start_
+    bic     r2, r2, #1
+    ldr     r0, = __data_start__
+    add     r0, r0, r2
+    ldr     r3, = __data_end__
+    add     r3, r3, r2
+    b       LoopCopyDataInit
+CopyDataInit:
+    ldr     r2, [r0, r1]
+    str     r2, [r9, r1]
+    adds    r1, r1, #4
+LoopCopyDataInit:
+    adds    r2, r0, r1
+    cmp     r2, r3
+    bcc     CopyDataInit
+
+    mov     r0, r9
+    adr     r1, _start_
+    bic     r1, r1, #1
+    bl      _reloc
+
+	@ pop     {r0, r12}
+    mov     r0, sp
+    adr		r1, _start_
+    bl      _start_tiny_init
+    b		.
+	.end

mkrtos_user/lib/mlibc/src/env/__libc_start_main_tiny.c

@@ -0,0 +1,50 @@
+#include <elf.h>
+#include <poll.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <unistd.h>
+#include "libc.h"
+
+static size_t fake_auxv[20];
+#define AUX_CNT 38
+
+int __libc_start_main_tiny(int (*main)(int, char **, char **), int argc, char **argv,
+                           void (*init_dummy)(), void (*fini_dummy)())
+{
+	char **envp = argv + argc + 1;
+    
+    size_t i, *auxv, aux[AUX_CNT] = {0};
+	for (i = 0; envp[i]; i++)
+		;
+	libc.auxv = auxv = (void *)(envp + i + 1);
+	for (i = 0; auxv[i]; i += 2)
+	{
+		if (auxv[i] < AUX_CNT)
+		{
+			aux[auxv[i]] = auxv[i + 1];
+		}
+		else if (auxv[i] == 0xfe)
+		{
+			extern void u_env_init(void **in_env);
+
+			u_env_init((void *)auxv[i + 1]);
+		}
+	}
+
+    libc.page_size = 512;
+    libc.auxv = fake_auxv;
+    __init_tls(fake_auxv);
+
+    // _init();
+    extern void *app_start_addr;
+    extern weak hidden void (*const __init_array_start)(void), (*const __init_array_end)(void);
+
+    unsigned long start_addr = ((unsigned long)app_start_addr) & (~3UL);
+
+    uintptr_t a = (uintptr_t)&__init_array_start;
+    for (; a < (uintptr_t)&__init_array_end; a += sizeof(void (*)()))
+    {
+        ((void (*)(void))((uintptr_t)(*((unsigned long *)a)) + start_addr | 0x1UL))();
+    }
+    exit(main(0, NULL, 0));
+}

mkrtos_user/server/fs/cpiofs/heap_stack.c

@@ -1,6 +1,6 @@
 
 #define HEAP_SIZE 512
-#define STACK_SIZE 1024 * 2
+#define STACK_SIZE (2048)
 
 #if defined(__CC_ARM)
 #define HEAP_ATTR SECTION("HEAP") __attribute__((zero_init))

mkrtos_user/server/fs/fatfs/CMakeLists.txt

@@ -73,10 +73,10 @@ add_custom_target(
     ${CMAKE_SIZE} fatfs.elf
     COMMAND
     mkdir -p ${CMAKE_SOURCE_DIR}/build/output/cpio
-    COMMAND
+    # COMMAND
-    cp fatfs.bin ${CMAKE_SOURCE_DIR}/build/output/cpio/fatfs
+    # cp fatfs.bin ${CMAKE_SOURCE_DIR}/build/output/cpio/fatfs
-    COMMAND
+    # COMMAND
-    cp fatfs.elf ${CMAKE_SOURCE_DIR}/build/output/fatfs.elf
+    # cp fatfs.elf ${CMAKE_SOURCE_DIR}/build/output/fatfs.elf
 )
 
 add_dependencies(fatfs_dump fatfs.elf)

mkrtos_user/server/hello/CMakeLists.txt

@@ -11,7 +11,7 @@ add_executable(hello.elf
 )
 target_link_libraries(hello.elf
     PUBLIC
-    start
+    start_tiny
     muslc
     sys
     sys_util

mkrtos_user/server/hello/src/main.c

@@ -1,20 +1,21 @@
 
-#include <stdio.h>
+// #include <stdio.h>
-
+#include <cons_cli.h>
 int main(int argc, char *args[])
 {
-    printf("print test0.\n");
+    cons_write_str("Hello world.\n");
-    printf("print test1.\n");
+    // printf("print test0.\n");
-    printf("print test2.\n");
+    // printf("print test1.\n");
-    float a = 1.1;
+    // printf("print test2.\n");
-    float b = 1.2;
+    // float a = 1.1;
-    float c;
+    // float b = 1.2;
+    // float c;
 
-    while (1)
+    // while (1)
-    {
+    // {
-        c = a + b;
+    //     c = a + b;
-        printf("%c %d %f\n", 'a', 1234, 1.1);
+    //     printf("%c %d %f\n", 'a', 1234, 1.1);
-        printf("%c %d %lf\n", 'a', 1234, a * b);
+    //     printf("%c %d %lf\n", 'a', 1234, a * b);
-    }
+    // }
     return 0;
 }

mkrtos_user/server/shell/src/heap_stack.c

@@ -1,6 +1,6 @@
 
 #define HEAP_SIZE 2048
-#define STACK_SIZE 2048
+#define STACK_SIZE (1024 + 256)
 
 #if defined(__CC_ARM)
 #define HEAP_ATTR SECTION("HEAP") __attribute__((zero_init))

mkrtos_user/server/tinycc-arm-thumb/CMakeLists.txt

@@ -91,10 +91,10 @@ add_custom_target(
     ${CMAKE_SIZE} tcc.elf
     COMMAND
     mkdir -p ${CMAKE_SOURCE_DIR}/build/output/cpio
-    COMMAND
+    # COMMAND
-    cp tcc.bin ${CMAKE_SOURCE_DIR}/build/output/cpio/tcc
+    # cp tcc.bin ${CMAKE_SOURCE_DIR}/build/output/cpio/tcc
-    COMMAND
+    # COMMAND
-    cp tcc.elf ${CMAKE_SOURCE_DIR}/build/output/tcc.elf
+    # cp tcc.elf ${CMAKE_SOURCE_DIR}/build/output/tcc.elf
 )
 
 add_dependencies(tcc_dump tcc.elf)

setting.cmake

@@ -34,7 +34,7 @@ endif()
 
 
 # -mfloat-abi=soft  -u _printf_float 
-set(CMAKE_C_FLAGS "-mcpu=${CONFIG_ARCH}  -O0 -g3 -lc -lrdimon -mfloat-abi=${FLOAT_TYPE} -u _printf_float -D=MKRTOS \
+set(CMAKE_C_FLAGS "-mcpu=${CONFIG_ARCH}  -Os -g3 -lc -lrdimon -mfloat-abi=${FLOAT_TYPE} -u _printf_float -D=MKRTOS \
 -std=gnu11 -ffunction-sections -fdata-sections -fno-builtin \
 -nostartfiles -nodefaultlibs -nostdlib -nostdinc -Xlinker  \
 -fno-stack-protector -Wl,--gc-sections \