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elf_loader's Issues

Elf compiled in c++

Hello. Is it possible to use C++ to create an elf file using classes? All attempts to load the file were unsuccessful.

CPU panic'ed when trying to pass a multidimensional array to slave program

Hi,
I am trying to pass a multidimensional array to slave program but failed.
The ELF can not be loaded and the serial log is below:

Cannot load ELF file!

assert failed: tlsf_free heap_tlsf.c:872 (!block_is_free(block) && "block already marked as free")


Backtrace:0x4008190a:0x3ffb4f200x400851ad:0x3ffb4f40 0x4008a0cd:0x3ffb4f60 0x40089437:0x3ffb5080 0x40089d36:0x3ffb50a0 0x40081b7a:0x3ffb50c0 0x400d4da8:0x3ffb50e0 0x400d5002:0x3ffb5100 0x400d4d8d:0x3ffb5120 0x400e5b0c:0x3ffb5980 0x40087ac9:0x3ffb59a0
0x4008190a: panic_abort at E:/Espressif/frameworks/esp-idf-v4.4.1/components/esp_system/panic.c:402
0x400851ad: esp_system_abort at E:/Espressif/frameworks/esp-idf-v4.4.1/components/esp_system/esp_system.c:128
0x4008a0cd: __assert_func at E:/Espressif/frameworks/esp-idf-v4.4.1/components/newlib/assert.c:85
0x40089437: tlsf_free at E:/Espressif/frameworks/esp-idf-v4.4.1/components/heap/heap_tlsf.c:872 (discriminator 1)
0x40089d36: multi_heap_free_impl at E:/Espressif/frameworks/esp-idf-v4.4.1/components/heap/multi_heap.c:220
0x40081b7a: heap_caps_free at E:/Espressif/frameworks/esp-idf-v4.4.1/components/heap/heap_caps.c:340
0x400d4da8: ElfLoader::elfLoaderFree() at E:\C++\esp32\template-app\build/../components/ELF-Loader/loader.cpp:109
0x400d5002: ElfLoader::~ElfLoader() at E:\C++\esp32\template-app\build/../components/ELF-Loader/loader.cpp:254
0x400d4d8d: app_main at E:\C++\esp32\template-app\build/../main/main.cpp:16
0x400e5b0c: main_task at E:/Espressif/frameworks/esp-idf-v4.4.1/components/freertos/port/port_common.c:129 (discriminator 2)
0x40087ac9: vPortTaskWrapper at E:/Espressif/frameworks/esp-idf-v4.4.1/components/freertos/port/xtensa/port.c:131

Test code is attached below:

Slave program code 
#include <stdio.h>
#include <stdint.h>

void delay(size_t millsec);

int local_main(int argc,char argv[4][512]) {
    if(argc <=2){
        printf("No arguement!\n");
        return -1;
    }
    for(int i=0;i<20;i++){
        for(int j=0;j<argc-1;j++){
            printf("Arg[%i]: %s\n",j,argv[j]);
        }
        printf("\nIt works for %i times!\n\n",i+1);
        delay(1000);
    }
    return 0;
}
Host program code 
#include "Program.h"
#include "loader.hpp"
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <stdio.h>

extern "C" void delay(size_t microsec)
{
    TickType_t xDelay = microsec / portTICK_PERIOD_MS;
    vTaskDelay(xDelay);
}

extern "C" void app_main()
{
    ElfLoader t((void*)Program, { { "puts", (void*)puts }, { "printf", (void*)printf }, { "delay", (void*)delay } });
    t.parse();
    if (t.relocate() == 0) {
        int ret = 0;
        char in[4][512] = { "local_main","Hello,World!","",""};
        ret = ((int (*)(int c, char v[4][512]))t.getEntryPoint())(2, in);
        printf("Program exited with errcode %i\n", ret);
    } else {
        printf("Cannot load ELF file!\n");
    }
}

Note that the issue was found before #1 being solved!

CPU panic'ed when the function was used in the elf but not relocated in the main program

Hi,
I'm trying this library.What a good library you have made!

But I found something wrong.As is said in the title,
I tried the program below,

#include <stdio.h>
#include <stdint.h>

int delay(size_t millsec);

uint32_t local_main(uint32_t arg) {
    for(int i=0;i<20;i++){
        printf("Hello world!\n");
        printf("It works for %i times!\n",i);
        delay(3000);
    }
    return 0;
}

As you can see,I used a external function "delay()",but when I do NOT add an implement to the relocate table,the CPU panic'ed.

The host program is below:

#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <stdio.h>
#include "loader.hpp"
#include "Program.h"

extern "C" void delay(size_t microsec){
  TickType_t xDelay = microsec / portTICK_PERIOD_MS;
  vTaskDelay(xDelay);
}

extern "C" void app_main() {
  ElfLoader test((void*)Program, {
    {"puts", (void*) puts},
    { "printf", (void*) printf },
    { "delay",(void*) delay }
  });
  test.parse();
  if(test.relocate()==0){
    ((void (*) ())test.getEntryPoint())();
  }else{
    printf("Cannot load ELF file!\n");
  }
}

Could anyone help me,please?
Thanks.

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