linux-kernel - Re: [PATCH v2 08/14] objtool: Add elf_create

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Message-ID: <20210319151259.6ddhamrh42wbvxav@treble>
Date:   Fri, 19 Mar 2021 10:12:59 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     x86@...nel.org, jgross@...e.com, mbenes@...e.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 08/14] objtool: Add elf_create_reloc() helper

On Fri, Mar 19, 2021 at 10:47:36AM +0100, Peter Zijlstra wrote:
> Full patch, because diff on a diff on a diff is getting ludicrous hard
> to read :-)

Appreciated :-)

> -void elf_add_reloc(struct elf *elf, struct reloc *reloc)
> +int elf_add_reloc(struct elf *elf, struct section *sec, unsigned long offset,
> +		  unsigned int type, struct symbol *sym, int addend)
>  {
> -	struct section *sec = reloc->sec;
> +	struct reloc *reloc;
> +
> +	reloc = malloc(sizeof(*reloc));
> +	if (!reloc) {
> +		perror("malloc");
> +		return -1;
> +	}
> +	memset(reloc, 0, sizeof(*reloc));
> +
> +	reloc->sec = sec->reloc;

Maybe elf_add_reloc() could create the reloc section if it doesn't
already exist, that would help remove the multiple calls to
elf_create_reloc_section().

> +	reloc->offset = offset;
> +	reloc->type = type;
> +	reloc->sym = sym;
> +	reloc->addend = addend;
>  
>  	list_add_tail(&reloc->list, &sec->reloc_list);

This should be sec->reloc->reloc_list?

-- 
Josh