Support for building and running external apps (#112)

2024-12-08 16:46:19 +01:00
parent 42e843b463
commit 415442e410
74 changed files with 2901 additions and 126 deletions
@@ -0,0 +1,216 @@
+/*
+ * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <reent.h>
+#include <pthread.h>
+#include <setjmp.h>
+#include <getopt.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <ctype.h>
+
+#include "rom/ets_sys.h"
+
+#include "elf_symbol.h"
+
+
+extern int __ltdf2 (double a, double b);
+extern unsigned int __fixunsdfsi (double a);
+extern int __gtdf2 (double a, double b);
+extern double __floatunsidf (unsigned int i);
+extern double __divdf3 (double a, double b);
+
+/** @brief Libc public functions symbols look-up table */
+
+static const struct esp_elfsym g_esp_libc_elfsyms[] = {
+
+    /* string.h */
+
+    ESP_ELFSYM_EXPORT(strerror),
+    ESP_ELFSYM_EXPORT(memset),
+    ESP_ELFSYM_EXPORT(memcpy),
+    ESP_ELFSYM_EXPORT(strlen),
+    ESP_ELFSYM_EXPORT(strtod),
+    ESP_ELFSYM_EXPORT(strrchr),
+    ESP_ELFSYM_EXPORT(strchr),
+    ESP_ELFSYM_EXPORT(strcmp),
+    ESP_ELFSYM_EXPORT(strtol),
+    ESP_ELFSYM_EXPORT(strcspn),
+    ESP_ELFSYM_EXPORT(strncat),
+
+    /* stdio.h */
+
+    ESP_ELFSYM_EXPORT(puts),
+    ESP_ELFSYM_EXPORT(putchar),
+    ESP_ELFSYM_EXPORT(fputc),
+    ESP_ELFSYM_EXPORT(fputs),
+    ESP_ELFSYM_EXPORT(printf),
+    ESP_ELFSYM_EXPORT(vfprintf),
+    ESP_ELFSYM_EXPORT(fprintf),
+    ESP_ELFSYM_EXPORT(fwrite),
+
+    /* unistd.h */
+
+    ESP_ELFSYM_EXPORT(usleep),
+    ESP_ELFSYM_EXPORT(sleep),
+    ESP_ELFSYM_EXPORT(exit),
+    ESP_ELFSYM_EXPORT(close),
+
+    /* stdlib.h */
+
+    ESP_ELFSYM_EXPORT(malloc),
+    ESP_ELFSYM_EXPORT(calloc),
+    ESP_ELFSYM_EXPORT(realloc),
+    ESP_ELFSYM_EXPORT(free),
+
+    /* time.h */
+
+    ESP_ELFSYM_EXPORT(clock_gettime),
+    ESP_ELFSYM_EXPORT(strftime),
+
+    /* pthread.h */
+
+    ESP_ELFSYM_EXPORT(pthread_create),
+    ESP_ELFSYM_EXPORT(pthread_attr_init),
+    ESP_ELFSYM_EXPORT(pthread_attr_setstacksize),
+    ESP_ELFSYM_EXPORT(pthread_detach),
+    ESP_ELFSYM_EXPORT(pthread_join),
+    ESP_ELFSYM_EXPORT(pthread_exit),
+
+    /* newlib */
+
+    ESP_ELFSYM_EXPORT(__errno),
+    ESP_ELFSYM_EXPORT(__getreent),
+#ifdef __HAVE_LOCALE_INFO__
+    ESP_ELFSYM_EXPORT(__locale_ctype_ptr),
+#else
+    ESP_ELFSYM_EXPORT(_ctype_),
+#endif
+
+    /* math */
+
+    ESP_ELFSYM_EXPORT(__ltdf2),
+    ESP_ELFSYM_EXPORT(__fixunsdfsi),
+    ESP_ELFSYM_EXPORT(__gtdf2),
+    ESP_ELFSYM_EXPORT(__floatunsidf),
+    ESP_ELFSYM_EXPORT(__divdf3),
+
+    /* getopt.h */
+
+    ESP_ELFSYM_EXPORT(getopt_long),
+    ESP_ELFSYM_EXPORT(optind),
+    ESP_ELFSYM_EXPORT(opterr),
+    ESP_ELFSYM_EXPORT(optarg),
+    ESP_ELFSYM_EXPORT(optopt),
+
+    /* setjmp.h */
+
+    ESP_ELFSYM_EXPORT(longjmp),
+    ESP_ELFSYM_EXPORT(setjmp),
+
+    ESP_ELFSYM_END
+};
+
+/** @brief ESP-IDF public functions symbols look-up table */
+
+static const struct esp_elfsym g_esp_espidf_elfsyms[] = {
+
+    /* sys/socket.h */
+
+    ESP_ELFSYM_EXPORT(lwip_bind),
+    ESP_ELFSYM_EXPORT(lwip_setsockopt),
+    ESP_ELFSYM_EXPORT(lwip_socket),
+    ESP_ELFSYM_EXPORT(lwip_listen),
+    ESP_ELFSYM_EXPORT(lwip_accept),
+    ESP_ELFSYM_EXPORT(lwip_recv),
+    ESP_ELFSYM_EXPORT(lwip_recvfrom),
+    ESP_ELFSYM_EXPORT(lwip_send),
+    ESP_ELFSYM_EXPORT(lwip_sendto),
+    ESP_ELFSYM_EXPORT(lwip_connect),
+
+    /* arpa/inet.h */
+
+    ESP_ELFSYM_EXPORT(ipaddr_addr),
+    ESP_ELFSYM_EXPORT(lwip_htons),
+    ESP_ELFSYM_EXPORT(lwip_htonl),
+    ESP_ELFSYM_EXPORT(ip4addr_ntoa),
+
+    /* ROM functions */
+
+    ESP_ELFSYM_EXPORT(ets_printf),
+
+    ESP_ELFSYM_END
+};
+
+
+#ifdef CONFIG_ELF_LOADER_CUSTOMER_SYMBOLS
+static const struct esp_elfsym* custom_symbols = NULL;
+void elf_set_custom_symbols(const struct esp_elfsym* symbols) {
+    custom_symbols = symbols;
+}
+#endif
+
+/**
+ * @brief Find symbol address by name.
+ *
+ * @param sym_name - Symbol name
+ * 
+ * @return Symbol address if success or 0 if failed.
+ */
+uintptr_t elf_find_sym(const char *sym_name)
+{
+    const struct esp_elfsym *syms;
+
+#ifdef CONFIG_ELF_LOADER_LIBC_SYMBOLS
+    syms = g_esp_libc_elfsyms;
+    while (syms->name) {
+        if (!strcmp(syms->name, sym_name)) {
+            return (uintptr_t)syms->sym;
+        }
+
+        syms++;
+    }
+#else
+    syms = g_esp_libc_elfsyms;
+    (void)syms;
+#endif
+
+#ifdef CONFIG_ELF_LOADER_ESPIDF_SYMBOLS
+    syms = g_esp_espidf_elfsyms;
+    while (syms->name) {
+        if (!strcmp(syms->name, sym_name)) {
+            return (uintptr_t)syms->sym;
+        }
+
+        syms++;
+    }
+#else
+    syms = g_esp_espidf_elfsyms;
+    (void)syms;
+#endif
+
+#ifdef CONFIG_ELF_LOADER_CUSTOMER_SYMBOLS
+    syms = custom_symbols;
+    if (syms != NULL) {
+        while (syms->name) {
+            if (!strcmp(syms->name, sym_name)) {
+                return (uintptr_t)syms->sym;
+            }
+
+            syms++;
+        }
+    }
+
+#endif
+
+    return 0;
+}
+