diff options
| author | Alex Bennée <alex.bennee@linaro.org> | 2022-01-05 13:50:01 +0000 |
|---|---|---|
| committer | Alex Bennée <alex.bennee@linaro.org> | 2022-01-18 16:44:16 +0000 |
| commit | 190674f3719d7a26387715952312f6397cddfaaf (patch) | |
| tree | 8d098db4736c706970675e120d052ea69f8f7d4f /linux-user/elfload.c | |
| parent | e7588237ce8f8115b5ad9a3ecdd46f60d95a461a (diff) | |
linux-user: don't adjust base of found hole
The pgb_find_hole function goes to the trouble of taking account of
both mmap_min_addr and any offset we've applied to decide the starting
address of a potential hole. This is especially important for
emulating 32bit ARM in a 32bit build as we have applied the offset to
ensure there will be space to map the ARM_COMMPAGE bellow the main
guest map (using wrapped arithmetic).
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/690
Message-Id: <20220105135009.1584676-27-alex.bennee@linaro.org>
Diffstat (limited to 'linux-user/elfload.c')
| -rw-r--r-- | linux-user/elfload.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 30dbb005c2..99829faf89 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -2339,8 +2339,7 @@ static uintptr_t pgb_find_hole(uintptr_t guest_loaddr, uintptr_t guest_size, brk = (uintptr_t)sbrk(0); if (!maps) { - ret = pgd_find_hole_fallback(guest_size, brk, align, offset); - return ret == -1 ? -1 : ret - guest_loaddr; + return pgd_find_hole_fallback(guest_size, brk, align, offset); } /* The first hole is before the first map entry. */ @@ -2380,7 +2379,7 @@ static uintptr_t pgb_find_hole(uintptr_t guest_loaddr, uintptr_t guest_size, /* Record the lowest successful match. */ if (ret < 0) { - ret = align_start - guest_loaddr; + ret = align_start; } /* If this hole contains the identity map, select it. */ if (align_start <= guest_loaddr && |