[haiku-bugs] Re: [Haiku] #6271: support for images with a single rwx PT_LOAD program header
- From: "lucian" <trac@xxxxxxxxxxxx>
- Date: Tue, 06 Jul 2010 14:34:03 -0000
#6271: support for images with a single rwx PT_LOAD program header
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Reporter: lucian | Owner: axeld
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: System/Kernel | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Has a Patch: 1
Platform: All | Blocking:
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Comment (by lucian):
Ok, on PPC the data segments may be executable, but are there two
{{{PT_LOAD}}} program headers: one that is .data (rwx) and .text?
Initially, for me, the single {{{PT_LOAD}}} program header was loaded in
{{{.data}}} and nothing in {{{.text}}}.
The problem appeared when it tried to run {{{elf_parse_dynamic_section}}}
because of
image->dynamic_section += image->text_region.delta
from {{{load_kernel_add_on()}}} in {{{src/system/kernel/elf.cpp}}}.
If there is only a single rwx {{{.data}}} section and no {{{.text}}}
section, {{{image->text_region.delta}}} will be {{{0}}} => the dynamic
section will not begin after the {{{.text}}} but after {{{NULL}}}. This
will most surely result in a page fault.
--
Ticket URL: <http://dev.haiku-os.org/ticket/6271#comment:6>
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