motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-12-11 16:00:50 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

linux-user: Fix shmat emulation by honoring host SHMLBA

Browse source 
For those hosts with SHMLBA > getpagesize, we don't automatically
select a guest address that is compatible with the host.  We can
achieve this by boosting the alignment of guest_base and by adding
an extra alignment argument to mmap_find_vma.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20190519201953.20161-13-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2019-05-19 13:19:52 -07:00 • committed by Laurent Vivier
parent abcac736c1
commit 30ab9ef296
4 changed files with 52 additions and 44 deletions
Download patch file Download diff file Expand all files Collapse all files

3
linux-user/syscall.c
View file

@ -3912,7 +3912,8 @@ static inline abi_ulong do_shmat(CPUArchState *cpu_env,
else {
abi_ulong mmap_start;
mmap_start = mmap_find_vma(0, shm_info.shm_segsz);
/* In order to use the host shmat, we need to honor host SHMLBA. */
mmap_start = mmap_find_vma(0, shm_info.shm_segsz, MAX(SHMLBA, shmlba));
if (mmap_start == -1) {
errno = ENOMEM;