| commit | 86f04735ac2088d5c069c3d1712212ec7428c562 | |
| author | Helge Deller <deller@gmx.de> | |
| Sun, 25 Dec 2022 08:23:19 +0000 (25 09:23 +0100) | ||
| committer | Laurent Vivier <laurent@vivier.eu> | |
| Fri, 10 Mar 2023 19:42:00 +0000 (10 20:42 +0100) | ||
| tree | 7dffbd2e4f8081dbeeca902a72aec54d6b7b5922 | treesnapshot (tar.gz zip) |
| parent | 25bb27c715f6ea7cd68561112cbfc1dba4ff46bd | commitdiff |
linux-user: Fix brk() to release pages
The current brk() implementation does not de-allocate pages if a lower
address is given compared to earlier brk() calls.
But according to the manpage, brk() shall deallocate memory in this case
and currently it breaks a real-world application, specifically building
the debian gcl package in qemu-user.
Fix this issue by reworking the qemu brk() implementation.
Tested with the C-code testcase included in qemu commit 4d1de87c750, and
by building debian package of gcl in a hppa-linux guest on a x86-64
host.
Signed-off-by: Helge Deller <deller@gmx.de>
Message-Id: <Y6gId80ek49TK1xB@p100>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
The current brk() implementation does not de-allocate pages if a lower
address is given compared to earlier brk() calls.
But according to the manpage, brk() shall deallocate memory in this case
and currently it breaks a real-world application, specifically building
the debian gcl package in qemu-user.
Fix this issue by reworking the qemu brk() implementation.
Tested with the C-code testcase included in qemu commit 4d1de87c750, and
by building debian package of gcl in a hppa-linux guest on a x86-64
host.
Signed-off-by: Helge Deller <deller@gmx.de>
Message-Id: <Y6gId80ek49TK1xB@p100>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
| linux-user/syscall.c | diffblobblamehistory |