Function elf_file_read

components/lwp/lwp_elf.c:237–260

* @brief Read data from an ELF file at a specific offset. * * @param fd File descriptor of the ELF file. * @param buffer Pointer to the buffer where the read data will be stored. * @param size Number of bytes to read. * @param offset File offset where reading should begin. * @return RT_EOK on success, -RT_ERROR if seek or read operations fail. */

 * @return RT_EOK on success, -RT_ERROR if seek or read operations fail.
 */
static int elf_file_read(rt_int32_t fd, rt_uint8_t *buffer, size_t size, off_t offset)
{
    ssize_t read_len;
    off_t pos;

    if (size > 0)
    {
        pos = lseek(fd, offset, SEEK_SET);
        if (pos != offset)
        {
            LOG_E("%s : seek file offset: 0x%x failed", __func__, offset);
            return -RT_ERROR;
        }

        read_len = read(fd, buffer, size);
        if (read_len != size)
        {
            LOG_E("%s : read from offset: 0x%x error", __func__, offset);
            return -RT_ERROR;
        }
    }

    return RT_EOK;
}

/**
 * @brief Validate an ELF header.