feat: add libc rom linker files

example/stub_main.c

@@ -7,6 +7,7 @@
 #include <stdint.h>
 #include <stdarg.h>
 #include <stddef.h>
+#include <string.h>
 
 #include <esp-stub-lib/log.h>
 #include <esp-stub-lib/flash.h>
@@ -48,7 +49,9 @@ static  __attribute__((unused)) int handle_test2(va_list ap)
 {
     (void)ap;
 
-    STUB_LOG("test2\n");
+    char buf[10];
+    strcpy(buf, "test2\n");
+    STUB_LOG(buf);
 
     return 0;
 }

src/esp32/CMakeLists.txt

@@ -11,3 +11,4 @@ target_include_directories(${ESP_TARGET_LIB}
 )
 
 target_link_options(${ESP_TARGET_LIB} PUBLIC -T${CMAKE_CURRENT_LIST_DIR}/ld/esp32.rom.ld)
+target_link_options(${ESP_TARGET_LIB} PUBLIC -T${CMAKE_CURRENT_LIST_DIR}/ld/esp32.rom.libc-funcs.ld)

src/esp32/ld/esp32.rom.libc-funcs.ld

@@ -0,0 +1,74 @@
+/* These are the newlib functions present in ESP32 ROM.
+   They should not be used when compiling with PSRAM cache workaround enabled.
+   See also esp32.rom.newlib-data.ld for the list of .data/.bss symbols
+   used by these functions, and esp32.rom.newlib-nano.ld for "nano" versions
+   of printf/scanf family of functions.
+
+   Unlike other ROM functions which are exported using PROVIDE, which declares
+   weak symbols, newlib related functions are exported using assignment,
+   which declares strong symbols. This is done so that ROM functions are always
+   used instead of the ones provided by libc.a.
+
+   Time functions were moved to the esp32.rom.newlib-time.ld file.
+ */
+
+abs = 0x40056340;
+bzero = 0x4000c1f4;
+div = 0x40056348;
+__dummy_lock = 0x4000c728;
+__dummy_lock_try = 0x4000c730;
+isalnum = 0x40000f04;
+isalpha = 0x40000f18;
+isascii = 0x4000c20c;
+isblank = 0x40000f2c;
+iscntrl = 0x40000f50;
+isdigit = 0x40000f64;
+isgraph = 0x40000f94;
+islower = 0x40000f78;
+isprint = 0x40000fa8;
+ispunct = 0x40000fc0;
+isspace = 0x40000fd4;
+isupper = 0x40000fe8;
+__itoa = 0x40056678;
+itoa = 0x400566b4;
+labs = 0x40056370;
+ldiv = 0x40056378;
+longjmp = 0x400562cc;
+memccpy = 0x4000c220;
+memchr = 0x4000c244;
+memcmp = 0x4000c260;
+memcpy = 0x4000c2c8;
+memmove = 0x4000c3c0;
+memrchr = 0x4000c400;
+memset = 0x4000c44c;
+qsort = 0x40056424;
+__sccl = 0x4000c498;
+setjmp = 0x40056268;
+strcasecmp = 0x400011cc;
+strcasestr = 0x40001210;
+strcat = 0x4000c518;
+strchr = 0x4000c53c;
+strcmp = 0x40001274;
+strcoll = 0x40001398;
+strcpy = 0x400013ac;
+strcspn = 0x4000c558;
+strlcat = 0x40001470;
+strlcpy = 0x4000c584;
+strlen = 0x400014c0;
+strlwr = 0x40001524;
+strncasecmp = 0x40001550;
+strncat = 0x4000c5c4;
+strncmp = 0x4000c5f4;
+strncpy = 0x400015d4;
+strnlen = 0x4000c628;
+strrchr = 0x40001708;
+strsep = 0x40001734;
+strspn = 0x4000c648;
+strstr = 0x4000c674;
+strupr = 0x4000174c;
+__submore = 0x40058f3c;
+toascii = 0x4000c720;
+tolower = 0x40001868;
+toupper = 0x40001884;
+__utoa = 0x400561f0;
+utoa = 0x40056258;

src/esp32c2/CMakeLists.txt

@@ -11,3 +11,4 @@ target_include_directories(${ESP_TARGET_LIB}
 )
 
 target_link_options(${ESP_TARGET_LIB} PUBLIC -T${CMAKE_CURRENT_LIST_DIR}/ld/esp32c2.rom.ld)
+target_link_options(${ESP_TARGET_LIB} PUBLIC -T${CMAKE_CURRENT_LIST_DIR}/ld/esp32c2.rom.libc.ld)

src/esp32c2/ld/esp32c2.rom.ld

@@ -1,9 +1,3 @@
-/*
- * SPDX-FileCopyrightText: 2021-2024 Espressif Systems (Shanghai) CO LTD
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
 /* ROM function interface esp32c2.rom.ld for esp32c2
  *
  *

src/esp32c2/ld/esp32c2.rom.libc.ld

@@ -0,0 +1,85 @@
+esp_rom_newlib_init_common_mutexes = 0x40000484;
+memset = 0x40000488;
+memcpy = 0x4000048c;
+memmove = 0x40000490;
+memcmp = 0x40000494;
+strcpy = 0x40000498;
+strncpy = 0x4000049c;
+strcmp = 0x400004a0;
+strncmp = 0x400004a4;
+strlen = 0x400004a8;
+strstr = 0x400004ac;
+bzero = 0x400004b0;
+sbrk = 0x400004b8;
+isalnum = 0x400004bc;
+isalpha = 0x400004c0;
+isascii = 0x400004c4;
+isblank = 0x400004c8;
+iscntrl = 0x400004cc;
+isdigit = 0x400004d0;
+islower = 0x400004d4;
+isgraph = 0x400004d8;
+isprint = 0x400004dc;
+ispunct = 0x400004e0;
+isspace = 0x400004e4;
+isupper = 0x400004e8;
+toupper = 0x400004ec;
+tolower = 0x400004f0;
+toascii = 0x400004f4;
+memccpy = 0x400004f8;
+memchr = 0x400004fc;
+memrchr = 0x40000500;
+strcasecmp = 0x40000504;
+strcasestr = 0x40000508;
+strcat = 0x4000050c;
+strchr = 0x40000514;
+strcspn = 0x40000518;
+strcoll = 0x4000051c;
+strlcat = 0x40000520;
+strlcpy = 0x40000524;
+strlwr = 0x40000528;
+strncasecmp = 0x4000052c;
+strncat = 0x40000530;
+strnlen = 0x40000538;
+strrchr = 0x4000053c;
+strsep = 0x40000540;
+strspn = 0x40000544;
+strtok_r = 0x40000548;
+strupr = 0x4000054c;
+longjmp = 0x40000550;
+setjmp = 0x40000554;
+abs = 0x40000558;
+div = 0x4000055c;
+labs = 0x40000560;
+ldiv = 0x40000564;
+qsort = 0x40000568;
+utoa = 0x40000578;
+itoa = 0x4000057c;
+__match = 0x400005dc;
+__hexnan = 0x400005e0;
+__hexdig_fun = 0x400005e4;
+__gethex = 0x400005e8;
+_Balloc = 0x400005ec;
+_Bfree = 0x400005f0;
+__multadd = 0x400005f4;
+__s2b = 0x400005f8;
+__hi0bits = 0x400005fc;
+__lo0bits = 0x40000600;
+__i2b = 0x40000604;
+__multiply = 0x40000608;
+__pow5mult = 0x4000060c;
+__lshift = 0x40000610;
+__mcmp = 0x40000614;
+__mdiff = 0x40000618;
+__ulp = 0x4000061c;
+__b2d = 0x40000620;
+__d2b = 0x40000624;
+__ratio = 0x40000628;
+_mprec_log10 = 0x4000062c;
+__copybits = 0x40000630;
+__any_on = 0x40000634;
+nan = 0x40000668;
+nanf = 0x4000066c;
+/* Data (.data, .bss, .rodata) */
+syscall_table_ptr = 0x3fcdffd8;
+_global_impure_ptr = 0x3fcdffd4;

src/esp32c3/CMakeLists.txt

@@ -11,3 +11,4 @@ target_include_directories(${ESP_TARGET_LIB}
 )
 
 target_link_options(${ESP_TARGET_LIB} PUBLIC -T${CMAKE_CURRENT_LIST_DIR}/ld/esp32c3.rom.ld)
+target_link_options(${ESP_TARGET_LIB} PUBLIC -T${CMAKE_CURRENT_LIST_DIR}/ld/esp32c3.rom.libc.ld)

src/esp32c3/ld/esp32c3.rom.libc.ld

@@ -0,0 +1,60 @@
+esp_rom_newlib_init_common_mutexes = 0x40000350;
+memset = 0x40000354;
+memcpy = 0x40000358;
+memmove = 0x4000035c;
+memcmp = 0x40000360;
+strcpy = 0x40000364;
+strncpy = 0x40000368;
+strcmp = 0x4000036c;
+strncmp = 0x40000370;
+strlen = 0x40000374;
+strstr = 0x40000378;
+bzero = 0x4000037c;
+sbrk = 0x40000384;
+isalnum = 0x40000388;
+isalpha = 0x4000038c;
+isascii = 0x40000390;
+isblank = 0x40000394;
+iscntrl = 0x40000398;
+isdigit = 0x4000039c;
+islower = 0x400003a0;
+isgraph = 0x400003a4;
+isprint = 0x400003a8;
+ispunct = 0x400003ac;
+isspace = 0x400003b0;
+isupper = 0x400003b4;
+toupper = 0x400003b8;
+tolower = 0x400003bc;
+toascii = 0x400003c0;
+memccpy = 0x400003c4;
+memchr = 0x400003c8;
+memrchr = 0x400003cc;
+strcasecmp = 0x400003d0;
+strcasestr = 0x400003d4;
+strcat = 0x400003d8;
+strchr = 0x400003e0;
+strcspn = 0x400003e4;
+strcoll = 0x400003e8;
+strlcat = 0x400003ec;
+strlcpy = 0x400003f0;
+strlwr = 0x400003f4;
+strncasecmp = 0x400003f8;
+strncat = 0x400003fc;
+strnlen = 0x40000404;
+strrchr = 0x40000408;
+strsep = 0x4000040c;
+strspn = 0x40000410;
+strtok_r = 0x40000414;
+strupr = 0x40000418;
+longjmp = 0x4000041c;
+setjmp = 0x40000420;
+abs = 0x40000424;
+div = 0x40000428;
+labs = 0x4000042c;
+ldiv = 0x40000430;
+qsort = 0x40000434;
+utoa = 0x40000444;
+itoa = 0x40000448;
+/* Data (.data, .bss, .rodata) */
+syscall_table_ptr = 0x3fcdffe0;
+_global_impure_ptr = 0x3fcdffdc;

src/esp32c5/CMakeLists.txt

@@ -11,3 +11,4 @@ target_include_directories(${ESP_TARGET_LIB}
 )
 
 target_link_options(${ESP_TARGET_LIB} PUBLIC -T${CMAKE_CURRENT_LIST_DIR}/ld/esp32c5.rom.ld)
+target_link_options(${ESP_TARGET_LIB} PUBLIC -T${CMAKE_CURRENT_LIST_DIR}/ld/esp32c5.rom.libc.ld)

src/esp32c5/ld/esp32c5.rom.libc.ld

@@ -0,0 +1,60 @@
+esp_rom_newlib_init_common_mutexes = 0x400004b4;
+memset = 0x400004b8;
+memcpy = 0x400004bc;
+memmove = 0x400004c0;
+memcmp = 0x400004c4;
+strcpy = 0x400004c8;
+strncpy = 0x400004cc;
+strcmp = 0x400004d0;
+strncmp = 0x400004d4;
+strlen = 0x400004d8;
+strstr = 0x400004dc;
+bzero = 0x400004e0;
+sbrk = 0x400004e8;
+isalnum = 0x400004ec;
+isalpha = 0x400004f0;
+isascii = 0x400004f4;
+isblank = 0x400004f8;
+iscntrl = 0x400004fc;
+isdigit = 0x40000500;
+islower = 0x40000504;
+isgraph = 0x40000508;
+isprint = 0x4000050c;
+ispunct = 0x40000510;
+isspace = 0x40000514;
+isupper = 0x40000518;
+toupper = 0x4000051c;
+tolower = 0x40000520;
+toascii = 0x40000524;
+memccpy = 0x40000528;
+memchr = 0x4000052c;
+memrchr = 0x40000530;
+strcasecmp = 0x40000534;
+strcasestr = 0x40000538;
+strcat = 0x4000053c;
+strchr = 0x40000544;
+strcspn = 0x40000548;
+strcoll = 0x4000054c;
+strlcat = 0x40000550;
+strlcpy = 0x40000554;
+strlwr = 0x40000558;
+strncasecmp = 0x4000055c;
+strncat = 0x40000560;
+strnlen = 0x40000568;
+strrchr = 0x4000056c;
+strsep = 0x40000570;
+strspn = 0x40000574;
+strtok_r = 0x40000578;
+strupr = 0x4000057c;
+longjmp = 0x40000580;
+setjmp = 0x40000584;
+abs = 0x40000588;
+div = 0x4000058c;
+labs = 0x40000590;
+ldiv = 0x40000594;
+qsort = 0x40000598;
+utoa = 0x400005a8;
+itoa = 0x400005ac;
+/* Data (.data, .bss, .rodata) */
+syscall_table_ptr = 0x4085ffd4;
+_global_impure_ptr = 0x4085ffd0;

src/esp32c6/CMakeLists.txt

@@ -11,3 +11,4 @@ target_include_directories(${ESP_TARGET_LIB}
 )
 
 target_link_options(${ESP_TARGET_LIB} PUBLIC -T${CMAKE_CURRENT_LIST_DIR}/ld/esp32c6.rom.ld)
+target_link_options(${ESP_TARGET_LIB} PUBLIC -T${CMAKE_CURRENT_LIST_DIR}/ld/esp32c6.rom.libc.ld)

src/esp32c6/ld/esp32c6.rom.libc.ld

@@ -0,0 +1,60 @@
+esp_rom_newlib_init_common_mutexes = 0x400004a4;
+memset = 0x400004a8;
+memcpy = 0x400004ac;
+memmove = 0x400004b0;
+memcmp = 0x400004b4;
+strcpy = 0x400004b8;
+strncpy = 0x400004bc;
+strcmp = 0x400004c0;
+strncmp = 0x400004c4;
+strlen = 0x400004c8;
+strstr = 0x400004cc;
+bzero = 0x400004d0;
+sbrk = 0x400004d8;
+isalnum = 0x400004dc;
+isalpha = 0x400004e0;
+isascii = 0x400004e4;
+isblank = 0x400004e8;
+iscntrl = 0x400004ec;
+isdigit = 0x400004f0;
+islower = 0x400004f4;
+isgraph = 0x400004f8;
+isprint = 0x400004fc;
+ispunct = 0x40000500;
+isspace = 0x40000504;
+isupper = 0x40000508;
+toupper = 0x4000050c;
+tolower = 0x40000510;
+toascii = 0x40000514;
+memccpy = 0x40000518;
+memchr = 0x4000051c;
+memrchr = 0x40000520;
+strcasecmp = 0x40000524;
+strcasestr = 0x40000528;
+strcat = 0x4000052c;
+strchr = 0x40000534;
+strcspn = 0x40000538;
+strcoll = 0x4000053c;
+strlcat = 0x40000540;
+strlcpy = 0x40000544;
+strlwr = 0x40000548;
+strncasecmp = 0x4000054c;
+strncat = 0x40000550;
+strnlen = 0x40000558;
+strrchr = 0x4000055c;
+strsep = 0x40000560;
+strspn = 0x40000564;
+strtok_r = 0x40000568;
+strupr = 0x4000056c;
+longjmp = 0x40000570;
+setjmp = 0x40000574;
+abs = 0x40000578;
+div = 0x4000057c;
+labs = 0x40000580;
+ldiv = 0x40000584;
+qsort = 0x40000588;
+utoa = 0x40000598;
+itoa = 0x4000059c;
+/* Data (.data, .bss, .rodata) */
+syscall_table_ptr = 0x4087ffd4;
+_global_impure_ptr = 0x4087ffd0;