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avr32: fix integer overflow in ELF_ET_DYN_BASE 

Almost all arches define ELF_ET_DYN_BASE as 2/3 of TASK_SIZE.
Though it seems that some architectures do this in a wrong way.
The problem is that 2*TASK_SIZE may overflow 32-bits so
the real ELF_ET_DYN_BASE becomes wrong.
Fix this overflow by dividing TASK_SIZE prior to multiplying:
	 (TASK_SIZE / 3 * 2)

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
This commit is contained in:
Andrey Ryabinin 2015-03-24 18:31:22 +03:00 committed by Hans-Christian Egtvedt
parent 39a8804455
commit 940db9e654
1 changed files with 1 additions and 1 deletions
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2
arch/avr32/include/asm/elf.h
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@ -84,7 +84,7 @@ typedef struct user_fpu_struct elf_fpregset_t;
the loader. We need to make sure that it is out of the way of the program
that it will "exec", and that there is sufficient room for the brk. */
#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
/* This yields a mask that user programs can use to figure out what