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syscall_emul: update x86 mmap base address

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This commit is contained in:
Brandon Potter 2016-03-17 10:30:33 -07:00
parent f6cd7a4bb7
commit dbad391a9b
1 changed files with 18 additions and 6 deletions
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24
src/arch/x86/process.cc
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@ -112,9 +112,15 @@ X86_64LiveProcess::X86_64LiveProcess(LiveProcessParams *params,
// Set pointer for next thread stack. Reserve 8M for main stack.
next_thread_stack_base = stack_base - (8 * 1024 * 1024);
// Set up region for mmaps. This was determined empirically and may not
// always be correct.
mmap_end = (Addr)0x2aaaaaaab000ULL;
// "mmap_base" is a function which defines where mmap region starts in
// the process address space.
// mmap_base: PAGE_ALIGN(TASK_SIZE-MIN_GAP-mmap_rnd())
// TASK_SIZE: (1<<47)-PAGE_SIZE
// MIN_GAP: 128*1024*1024+stack_maxrandom_size()
// We do not use any address space layout randomization in gem5
// therefore the random fields become zero; the smallest gap space was
// chosen but gap could potentially be much larger.
mmap_end = (Addr)0x7FFFF7FFF000ULL;
}
void
@ -149,9 +155,15 @@ I386LiveProcess::I386LiveProcess(LiveProcessParams *params,
// Set pointer for next thread stack. Reserve 8M for main stack.
next_thread_stack_base = stack_base - (8 * 1024 * 1024);
// Set up region for mmaps. This was determined empirically and may not
// always be correct.
mmap_end = (Addr)0xf7ffe000ULL;
// "mmap_base" is a function which defines where mmap region starts in
// the process address space.
// mmap_base: PAGE_ALIGN(TASK_SIZE-MIN_GAP-mmap_rnd())
// TASK_SIZE: 0xC0000000
// MIN_GAP: 128*1024*1024+stack_maxrandom_size()
// We do not use any address space layout randomization in gem5
// therefore the random fields become zero; the smallest gap space was
// chosen but gap could potentially be much larger.
mmap_end = (Addr)0xB7FFF000ULL;
}
SyscallDesc*