Messages in this thread | | | From | Markus Schoder <> | Subject | ia32 binfmt problem with x86-64 | Date | Mon, 26 Jun 2006 01:43:16 +0200 |
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The 32 bit emulation for x86-64 has the following in arch/x86_64/ia32/ia32_binfmt.c:
#define elf_read_implies_exec(ex, have_pt_gnu_stack) \ (!(have_pt_gnu_stack))
I guess it should be same definition as in include/asm-i386/elf.h and include/asm-x86_64/elf.h instead:
#define elf_read_implies_exec(ex, executable_stack) \ (executable_stack != EXSTACK_DISABLE_X)
From the usage in fs/binfmt_elf.c it looks like the semantics of that macro changed slightly but was not fixed in all places (ia64 seems to have a similar problem from the looks of it).
The current behavior leads to 32 bit executables not setting the READ_IMPLIES_EXEC personality when they are marked as requiring an executable stack (64 bit executables do however).
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