diff options
author | Paul Brook <paul@codesourcery.com> | 2009-07-17 12:48:08 +0100 |
---|---|---|
committer | Paul Brook <paul@codesourcery.com> | 2009-07-17 13:12:41 +0100 |
commit | 379f6698d73f476de38682b3ff96ecb226728c43 (patch) | |
tree | 35ec0c77416322f16fa27d646af50c60363168e3 /linux-user/elfload.c | |
parent | a9ff9df188615d653a5a904bafbe724d40143e35 (diff) | |
download | hqemu-379f6698d73f476de38682b3ff96ecb226728c43.zip hqemu-379f6698d73f476de38682b3ff96ecb226728c43.tar.gz |
Userspace guest address offsetting
Re-implement GUEST_BASE support.
Offset guest ddress space by default if the guest binary contains
regions below the host mmap_min_addr.
Implement support for i386, x86-64 and arm hosts.
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
Signed-off-by: Paul Brook <paul@codesourcery.com>
Diffstat (limited to 'linux-user/elfload.c')
-rw-r--r-- | linux-user/elfload.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/linux-user/elfload.c b/linux-user/elfload.c index d31cca7..d4c9274 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -1545,6 +1545,29 @@ int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs, info->mmap = 0; elf_entry = (abi_ulong) elf_ex.e_entry; +#if defined(CONFIG_USE_GUEST_BASE) + /* + * In case where user has not explicitly set the guest_base, we + * probe here that should we set it automatically. + */ + if (!have_guest_base) { + /* + * Go through ELF program header table and find out whether + * any of the segments drop below our current mmap_min_addr and + * in that case set guest_base to corresponding address. + */ + for (i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; + i++, elf_ppnt++) { + if (elf_ppnt->p_type != PT_LOAD) + continue; + if (HOST_PAGE_ALIGN(elf_ppnt->p_vaddr) < mmap_min_addr) { + guest_base = HOST_PAGE_ALIGN(mmap_min_addr); + break; + } + } + } +#endif /* CONFIG_USE_GUEST_BASE */ + /* Do this so that we can load the interpreter, if need be. We will change some of these later */ info->rss = 0; |