From: Xi Ruoyao <xry111@xry111.site>
To: "H.J. Lu" <hjl.tools@gmail.com>, binutils@sourceware.org
Subject: Re: [PATCH v3] x86-64: Add -z mark-plt and -z nomark-plt
Date: Wed, 17 Jan 2024 19:02:53 +0800 [thread overview]
Message-ID: <32f802c6a0c3e0fce9b12da29b98574f82ea6d1e.camel@xry111.site> (raw)
In-Reply-To: <20230928153830.28922-1-hjl.tools@gmail.com>
Hi H.J.,
When I test Binutils-2.41.90 I get 4 test failures regarding mark-plt:
./ld/ld.log:FAIL: ld-x86-64/mark-plt-1b
./ld/ld.log:FAIL: ld-x86-64/mark-plt-1d
./ld/ld.log:FAIL: ld-x86-64/mark-plt-1b-x32
./ld/ld.log:FAIL: ld-x86-64/mark-plt-1d-x32
It seems related to --enable-default-hash-style=gnu: for mark-plt-1b
with --hash-style=both I get the same dump as the .d file:
0000000000001010 <bar@plt>:
1010: ff 25 32 11 00 00 jmp *0x1132(%rip) # 2148 <bar>
1016: 68 00 00 00 00 push $0x0
101b: e9 e0 ff ff ff jmp 1000 <bar@plt-0x10>
But with --hash-style=gnu:
0000000000001010 <bar@plt>:
1010: ff 25 22 11 00 00 jmp *0x1122(%rip) # 2138 <bar>
1016: 68 00 00 00 00 push $0x0
101b: e9 e0 ff ff ff jmp 1000 <bar@plt-0x10>
The simplest "fix" would be adding --hash-style=both for these tests but
I'm not sure if doing so is proper.
On Thu, 2023-09-28 at 08:38 -0700, H.J. Lu via Binutils wrote:
> diff --git a/ld/testsuite/ld-x86-64/mark-plt-1b.d b/ld/testsuite/ld-x86-64/mark-plt-1b.d
> new file mode 100644
> index 00000000000..dc046c031eb
> --- /dev/null
> +++ b/ld/testsuite/ld-x86-64/mark-plt-1b.d
> @@ -0,0 +1,16 @@
> +#source: mark-plt-1.s
> +#as: --64
> +#ld: -melf_x86_64 -shared -z mark-plt
> +#objdump: -dw
> +
> +#...
> +0+1010 <bar@plt>:
> + +1010: ff 25 32 11 00 00 jmp \*0x1132\(%rip\) # 2148 <bar>
> + +1016: 68 00 00 00 00 push \$0x0
> + +101b: e9 e0 ff ff ff jmp 1000 <bar@plt-0x10>
> +
> +Disassembly of section .text:
> +
> +0+1020 <foo>:
> + +1020: e8 eb ff ff ff call 1010 <bar@plt>
> +#pass
--
Xi Ruoyao <xry111@xry111.site>
School of Aerospace Science and Technology, Xidian University
next prev parent reply other threads:[~2024-01-17 11:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-28 15:38 H.J. Lu
2024-01-17 11:02 ` Xi Ruoyao [this message]
2024-01-17 16:12 ` H.J. Lu
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