如何摆脱GCC汇编警告＆QUOT的;设置不正确节.init＆QUOT属性;在C code吗？ [英] How to get rid of gcc assembler warning "setting incorrect section attributes for .init" in C code?

问题描述

我有以下的C code：

I have the following C code:

struct myStruct_t
{
    const char     m_name[60];
    const uint32_t m_data;
};

const struct myStruct_t myStruct
    __attribute__(( __aligned__( 64 ), section(".init") )) =
    {
        "myName",
        (uint32_t)&someOtherStruct
    };

当我在GCC 4.1.1（适用于PS3）编译，我得到警告：

When I compile in gcc 4.1.1 (for PS3), I get the warning:

1>c:/t/ccy6.s: Assembler messages:
1>c:/t/ccy6.s(106): Warning: setting incorrect section attributes for .init

组装code警告指的是下面的.section伪条款：

The assembly code the warning points to is the ".section" clause below:

            .section              .init,"aw",@progbits
            .align 6
            .type                 myStruct , @object
            .size                 myStruct , 64
myStruct :
            .ascii                "myName"
            .long                 someOtherStruct

它不喜欢的标志的W（写入）的部分，因为在.init东西是只读的，而在所有可能的地方并不强迫编译器不吐出常量，在 W。我怎么能告诉编译器没有，真的，这是const的，我不是在开玩笑？

It doesn't like the "w" (writable) part of the flags since stuff in .init is read-only, and "const" in all the possible places doesn't compel the compiler not to spit out the "w". How can I tell the compiler "no, really, it is const, I'm not kidding"?

推荐答案

这是与海湾合作委员会自指定为.section伪指令的参数有问题。幸运的是，栏目名称参数直接复制到汇编输出，允许您解决此问题。

This is a problem with GCC auto-specifying the parameters for the .section directive. Luckily, the section name parameter is copied directly into the assembly output, permitting you to work around this issue.

这个指令：

__attribute__ ((section(".init")))

生成此组件：

.section .init,"aw",@progbits

要删除的警告，你可以指定这样的属性：

To remove the warning, you can specify the attribute like this:

__attribute__ ((section(".init,\"ar\",@progbits ;")))

这将产生：

.section .init,"ar",@progbits ;"aw",@progbits

分号标志着该行作为注释的休息，所以汇编程序会忽略它。

The semicolon marks the rest of the line as a comment, so the assembler ignores it.

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