2005-04-16 15:20:36 -07:00
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2018-03-07 23:30:54 +01:00
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2016-05-23 16:22:26 -07:00
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2005-04-16 15:20:36 -07:00
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2008-01-30 13:31:46 +01:00
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2008-10-15 22:04:17 -07:00
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2016-05-23 16:22:26 -07:00
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2008-01-30 13:31:46 +01:00
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binfmt_elf: allow arch code to examine PT_LOPROC ... PT_HIPROC headers
MIPS is introducing new variants of its O32 ABI which differ in their
handling of floating point, in order to enable a gradual transition
towards a world where mips32 binaries can take advantage of new hardware
features only available when configured for certain FP modes. In order
to do this ELF binaries are being augmented with a new section that
indicates, amongst other things, the FP mode requirements of the binary.
The presence & location of such a section is indicated by a program
header in the PT_LOPROC ... PT_HIPROC range.
In order to allow the MIPS architecture code to examine the program
header & section in question, pass all program headers in this range
to an architecture-specific arch_elf_pt_proc function. This function
may return an error if the header is deemed invalid or unsuitable for
the system, in which case that error will be returned from
load_elf_binary and upwards through the execve syscall.
A means is required for the architecture code to make a decision once
it is known that all such headers have been seen, but before it is too
late to return from an execve syscall. For this purpose the
arch_check_elf function is added, and called once, after all PT_LOPROC
to PT_HIPROC headers have been passed to arch_elf_pt_proc but before
the code which invoked execve has been lost. This enables the
architecture code to make a decision based upon all the headers present
in an ELF binary and its interpreter, as is required to forbid
conflicting FP ABI requirements between an ELF & its interpreter.
In order to allow data to be stored throughout the calls to the above
functions, struct arch_elf_state is introduced.
Finally a variant of the SET_PERSONALITY macro is introduced which
accepts a pointer to the struct arch_elf_state, allowing it to act
based upon state observed from the architecture specific program
headers.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7679/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-09-11 08:30:16 +01:00
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2005-04-16 15:20:36 -07:00
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2017-08-11 00:53:39 -04:00
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2018-03-07 23:30:54 +01:00
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2016-05-23 16:22:26 -07:00
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2005-04-16 15:20:36 -07:00
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2016-05-23 16:22:26 -07:00
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2008-10-18 20:28:23 -07:00
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2010-10-27 15:34:09 -07:00
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2009-01-09 16:40:52 -08:00
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2008-10-18 20:28:23 -07:00
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2010-10-27 15:34:09 -07:00
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2008-10-18 20:28:23 -07:00
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2013-04-30 15:27:44 -07:00
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2005-04-16 15:20:36 -07:00
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2008-04-29 00:59:02 -07:00
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2016-08-05 06:03:41 +01:00
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2005-04-16 15:20:36 -07:00
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2008-06-17 12:19:34 +01:00
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2005-04-16 15:20:36 -07:00
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2008-06-17 12:19:34 +01:00
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2005-04-16 15:20:36 -07:00
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2018-05-08 15:14:57 -03:00
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2016-10-18 10:12:27 -02:00
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2005-04-16 15:20:36 -07:00
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2012-10-04 17:15:23 -07:00
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