diff options
Diffstat (limited to 'linux-user/user-mmap.h')
| -rw-r--r-- | linux-user/user-mmap.h | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/linux-user/user-mmap.h b/linux-user/user-mmap.h index f844ba4..0f4883e 100644 --- a/linux-user/user-mmap.h +++ b/linux-user/user-mmap.h @@ -25,10 +25,19 @@ * TASK_UNMAPPED_BASE: For mmap without hint (addr != 0), the search * for unused virtual memory begins at TASK_UNMAPPED_BASE. * - * task_unmapped_base: When the guest address space is limited via -R, - * the value of TASK_UNMAPPED_BASE is adjusted to fit. + * ELF_ET_DYN_BASE: When the executable is ET_DYN (i.e. PIE), and requires + * an interpreter (i.e. not -static-pie), use ELF_ET_DYN_BASE instead of + * TASK_UNMAPPED_BASE for selecting the address of the executable. + * This provides some distance between the executable and the interpreter, + * which allows the initial brk to be placed immediately after the + * executable and also have room to grow. + * + * task_unmapped_base, elf_et_dyn_base: When the guest address space is + * limited via -R, the values of TASK_UNMAPPED_BASE and ELF_ET_DYN_BASE + * must be adjusted to fit. */ extern abi_ulong task_unmapped_base; +extern abi_ulong elf_et_dyn_base; /* * mmap_next_start: The base address for the next mmap without hint, |