feat: add libc

targets/esp32.rom.newlib-data.ld

@@ -0,0 +1,23 @@
+/* These are the .bss/.data symbols used by newlib functions present in ESP32 ROM.
+   See also esp32.rom.newlib-funcs.ld for the list of general newlib functions,
+   and esp32.rom.newlib-nano.ld for "nano" versions of printf/scanf family of functions.
+
+   Unlike other ROM functions and data 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.
+ */
+
+_ctype_ = 0x3ff96354;
+__ctype_ptr__ = 0x3ff96350;
+environ = 0x3ffae0b4;
+_global_impure_ptr = 0x3ffae0b0;
+__mb_cur_max = 0x3ff96530;
+__sf_fake_stderr = 0x3ff96458;
+__sf_fake_stdin = 0x3ff96498;
+__sf_fake_stdout = 0x3ff96478;
+__wctomb = 0x3ff96540;
+__sfp_lock = 0x3ffae0ac;
+__sinit_lock = 0x3ffae0a8;
+__env_lock_object = 0x3ffae0b8;
+__tz_lock_object = 0x3ffae080;