Function elf_load_phdr

components/lwp/lwp_elf.c:392–431

* @brief Load the program header table from an ELF file. * * This function reads and validates the program header table from the ELF file. * It ensures the program header table is properly aligned and within the file bounds. * * @param elf_info Pointer to the ELF file information structure. * @return RT_EOK on success, -RT_ERROR on failure. */

 * @return RT_EOK on success, -RT_ERROR on failure.
 */
static int elf_load_phdr(elf_info_t *elf_info)
{
    Elf_Ehdr *ehdr = &elf_info->ehdr;
    uint32_t size;
    int ret;

    if (ehdr->e_phnum < 1)
    {
        return -RT_ERROR;
    }

    if (ehdr->e_phentsize != sizeof(Elf_Phdr))
    {
        return -RT_ERROR;
    }

    size = sizeof(Elf_Phdr) * ehdr->e_phnum;
    if ((ehdr->e_phoff + size) > elf_info->file_len)
    {
        return -RT_ERROR;
    }

    elf_info->phdr = rt_malloc(size);
    if (elf_info->phdr == RT_NULL)
    {
        LOG_E("%s : alloc phdr failed", __func__);
        return -RT_ENOMEM;
    }

    ret = elf_file_read(elf_info->fd, (rt_uint8_t *)elf_info->phdr, size, ehdr->e_phoff);
    if (ret != RT_EOK)
    {
        rt_free(elf_info->phdr);
        elf_info->phdr = RT_NULL;
        LOG_E("%s : elf_file_read failed, ret = %d", __func__, ret);
        return -RT_ERROR;
    }

    return RT_EOK;
}

/**
 * @brief Load the ELF interpreter specified in the program header.