diff options
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/x86/process.cc | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/src/arch/x86/process.cc b/src/arch/x86/process.cc index f0b8370c0..d2ce4dbd1 100644 --- a/src/arch/x86/process.cc +++ b/src/arch/x86/process.cc @@ -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* |