diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index ee54eed33b..125fcbe423 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -801,12 +801,13 @@ static inline int host_to_target_sock_type(int host_type) return target_type; } -static abi_ulong target_brk; +static abi_ulong target_brk, initial_target_brk; static abi_ulong brk_page; void target_set_brk(abi_ulong new_brk) { target_brk = TARGET_PAGE_ALIGN(new_brk); + initial_target_brk = target_brk; brk_page = HOST_PAGE_ALIGN(target_brk); } @@ -824,6 +825,11 @@ abi_long do_brk(abi_ulong brk_val) return target_brk; } + /* do not allow to shrink below initial brk value */ + if (brk_val < initial_target_brk) { + brk_val = initial_target_brk; + } + new_brk = TARGET_PAGE_ALIGN(brk_val); new_host_brk_page = HOST_PAGE_ALIGN(brk_val); |