diff --git a/build/build_flash_kl3.sh b/build/build_flash_kl3.sh
index c2c6ee3..7c0e753 100755
--- a/build/build_flash_kl3.sh
+++ b/build/build_flash_kl3.sh
@@ -938,6 +938,8 @@ if [ "${DEF_CORE_TYPE}" == "ampplc" ]; then
     ../tools/rom_img/make_ld.sh --addrs ../ap/.output/cus/lib/ht_${DEF_IMAGE_TYPE}.out \
     ../startup/ldscripts/riscv3/amp_cus_symbol > ../startup/ldscripts/riscv3/cus.addrs.ld
 fi
+../tools/rom_img/make_ld.sh --addrs ../sbl/.output/plc/lib/kunlun_sbl.out \
+    ../tools/rom_img/sbl_symbol > ../startup/ldscripts/riscv3/sbl.addrs.ld
 build_obj_func ${DEF_IMAGE_TYPE} ${DEF_PLC_APP} PLC
 
 # 删除 cfg_log.txt
diff --git a/sbl/src/sbl_printf.c b/sbl/src/sbl_printf.c
index 86c89e5..d1cad07 100644
--- a/sbl/src/sbl_printf.c
+++ b/sbl/src/sbl_printf.c
@@ -22,6 +22,8 @@ Information is free from patent or copyright infringement.
 #define SBL_DEBUG_UART_PORT    0
 
 extern struct uart_ctrl uart_e_ctrl;
+
+// 这个定义在其他文件
 extern uint32_t g_is_print_enable;
 
 static int (*format_str_v_fn)(const str_format_context *ctxt, const char *format,
@@ -65,6 +67,13 @@ int8_t getc(void)
         return (int8_t)c;
 }
 
+
+
+extern str_format_context rom_log_ctxt;
+extern int rom_format_str_v(const str_format_context *ctxt, const char *format,
+    va_list ap);
+
+
 int sbl_printf_init(void *sbl_format_str_v, void *sbl_log_ctxt)
 {
     format_str_v_fn = sbl_format_str_v;
@@ -81,6 +90,9 @@ int32_t sbl_printf(const char *fmt, ...)
 
     if (g_is_print_enable == 0)
         return 0;
+    if(!format_str_v_fn){
+        sbl_printf_init(rom_format_str_v, &rom_log_ctxt);
+    }
 
     va_start(ap, fmt);
     res = format_str_v_fn(p_log_ctxt, fmt, ap);
diff --git a/startup/ldscripts/riscv3/link_flash_4m_cco_plc_only.lds b/startup/ldscripts/riscv3/link_flash_4m_cco_plc_only.lds
index 1c68bb9..bacd264 100644
--- a/startup/ldscripts/riscv3/link_flash_4m_cco_plc_only.lds
+++ b/startup/ldscripts/riscv3/link_flash_4m_cco_plc_only.lds
@@ -178,4 +178,5 @@ SECTIONS
 
 }
 
-INCLUDE "rom.addrs.ld"
\ No newline at end of file
+INCLUDE "rom.addrs.ld"
+INCLUDE "sbl.addrs.ld"
\ No newline at end of file
diff --git a/startup/ldscripts/riscv3/link_flash_4m_sta_plc_only.lds b/startup/ldscripts/riscv3/link_flash_4m_sta_plc_only.lds
index 9ffab8a..93293b6 100644
--- a/startup/ldscripts/riscv3/link_flash_4m_sta_plc_only.lds
+++ b/startup/ldscripts/riscv3/link_flash_4m_sta_plc_only.lds
@@ -186,4 +186,5 @@ SECTIONS
 }
 
 INCLUDE "sec_cpu_sta.addrs.ld"
-INCLUDE "rom.addrs.ld"
\ No newline at end of file
+INCLUDE "rom.addrs.ld"
+INCLUDE "sbl.addrs.ld"
\ No newline at end of file
diff --git a/startup/ldscripts/riscv3/link_psram_8m_cco_plc_only.lds b/startup/ldscripts/riscv3/link_psram_8m_cco_plc_only.lds
index f025481..1f0c9ab 100644
--- a/startup/ldscripts/riscv3/link_psram_8m_cco_plc_only.lds
+++ b/startup/ldscripts/riscv3/link_psram_8m_cco_plc_only.lds
@@ -185,4 +185,5 @@ SECTIONS
 }
 
 INCLUDE "sec_cpu_cco.addrs.ld"
-INCLUDE "rom.addrs.ld"
\ No newline at end of file
+INCLUDE "rom.addrs.ld"
+INCLUDE "sbl.addrs.ld"
\ No newline at end of file
diff --git a/startup/ldscripts/riscv3/link_psram_8m_sta_plc_only.lds b/startup/ldscripts/riscv3/link_psram_8m_sta_plc_only.lds
index 50602cb..4a7fea5 100644
--- a/startup/ldscripts/riscv3/link_psram_8m_sta_plc_only.lds
+++ b/startup/ldscripts/riscv3/link_psram_8m_sta_plc_only.lds
@@ -185,4 +185,5 @@ SECTIONS
 }
 
 INCLUDE "sec_cpu_sta.addrs.ld"
-INCLUDE "rom.addrs.ld"
\ No newline at end of file
+INCLUDE "rom.addrs.ld"
+INCLUDE "sbl.addrs.ld"
\ No newline at end of file
diff --git a/startup/misc/main.c b/startup/misc/main.c
index e567db8..d2f878d 100644
--- a/startup/misc/main.c
+++ b/startup/misc/main.c
@@ -126,10 +126,15 @@ int32_t iot_module_start(void)
     return 0;
 }
 
+extern int32_t sbl_printf(const char *fmt, ...);
+
+
 uint32_t iot_plc_entry(iot_build_info_t *info)
 {
     sbl_param_input_t param = {0};
 
+    sbl_printf("enter fw...\n");
+
     iot_system_get_fw_boot_param(&param);
     // 设置app的build_info
     iot_version_set_user_build_info(info);
diff --git a/tools/rom_img/sbl_symbol b/tools/rom_img/sbl_symbol
new file mode 100644
index 0000000..0c6bb24
--- /dev/null
+++ b/tools/rom_img/sbl_symbol
@@ -0,0 +1 @@
+sbl_printf
\ No newline at end of file