include/exec/cpu_ldst.h | 4 +-- linux-user/elfload.c | 59 +++++++++++++---------------------------- linux-user/loader.h | 12 +++++++++ linux-user/main.c | 2 ++ linux-user/mmap.c | 33 ++++++++++++----------- linux-user/qemu.h | 4 +-- linux-user/syscall.c | 13 ++++++--- 7 files changed, 64 insertions(+), 63 deletions(-)
While trying to fix a bug which prevents running a static armhf binary with linux-user, I noticed a whole bunch of memory layout issues on various platforms. Most noteably the free heap space was very limited in the current setup. A large heap is important for example, if you want to use qemu-user for building Linux packages where gcc requires lots of space (e.g. using qemu-user as buildd for debian packages). Those findings led to this patch series, which - fixes qemu-arm to run static armhf binaries - shows the address of heap in /proc/self/maps output on all architectures - optimizes address layout of loaded executable - increases free heap for guest apps NOTE: - this patch series is for qemu v8.1.0-rc ONLY. - do not apply on top of v8.0-stable series, which uses a different search algorithm for free mmap memory and thus will give incorrect memory layouts. If people want to check, you may pull from here: https://github.com/hdeller/qemu-hppa/tree/brk-fixes-2 It would be great if other people would test as well, and if this patch series would be considered for inclusion into 8.0-rc release. I tested the patch series on top of git head with chroots of alpha, arm, armel, arm64, hppa, m68k, mips64el, mipsel, powerpc, ppc64, ppc64el, s390x, sh4 and sparc64 on a x86-64 host. The memory layout of git head and the layout with this patch series are both shown below as reference. Changes: v5: - Runtime-checked on many target architectures - Calculate valid memory layout based on GUEST_ADDR_MAX limit - Really fixed showing heap in /proc/self/maps for all architectures v4: - add note that patch series is for v8.1.0-rc only - changed TASK_UNMAPPED_BASE for 32- on 64-bit userspace ------------------------------------------------------------------------------------ Memory layout with this patch series applied: (output of: "uname -a && cat /proc/self/maps" from inside the chroot) alpha-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 alpha GNU/Linux 120000000-12000a000 r-xp 00000000 fd:00 417269 /usr/bin/cat 12000a000-12001e000 ---p 00000000 00:00 0 12001e000-120020000 r--p 0000e000 fd:00 417269 /usr/bin/cat 120020000-120022000 rw-p 00000000 00:00 0 120022000-120044000 rw-p 00000000 00:00 0 [heap] 7000000000-7000002000 ---p 00000000 00:00 0 7000002000-7000802000 rw-p 00000000 00:00 0 [stack] 7000802000-7000830000 r-xp 00000000 fd:00 421566 /usr/lib/alpha-linux-gnu/ld-linux.so.2 7000830000-7000840000 ---p 00000000 00:00 0 7000840000-7000842000 r--p 0002e000 fd:00 421566 /usr/lib/alpha-linux-gnu/ld-linux.so.2 7000842000-7000844000 rw-p 00030000 fd:00 421566 /usr/lib/alpha-linux-gnu/ld-linux.so.2 7000844000-7000846000 r-xp 00000000 00:00 0 7000850000-7000a30000 r-xp 00000000 fd:00 421569 /usr/lib/alpha-linux-gnu/libc.so.6.1 7000a30000-7000a3c000 ---p 001e0000 fd:00 421569 /usr/lib/alpha-linux-gnu/libc.so.6.1 7000a3c000-7000a40000 r--p 001ec000 fd:00 421569 /usr/lib/alpha-linux-gnu/libc.so.6.1 7000a40000-7000a42000 rw-p 001f0000 fd:00 421569 /usr/lib/alpha-linux-gnu/libc.so.6.1 7000a42000-7000a50000 rw-p 00000000 00:00 0 7000a56000-7000a5a000 rw-p 00000000 00:00 0 7f3a0c000000-7f3a0c000000 ---p 00000000 00:00 0 7f3a11e00000-7f3a11e00000 ---p 00000000 00:00 0 arm64-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 aarch64 GNU/Linux 5500000000-5500009000 r-xp 00000000 fd:00 570430 /usr/bin/cat 5500009000-550001f000 ---p 00000000 00:00 0 550001f000-5500020000 r--p 0000f000 fd:00 570430 /usr/bin/cat 5500020000-5500021000 rw-p 00010000 fd:00 570430 /usr/bin/cat 5500021000-5500042000 rw-p 00000000 00:00 0 [heap] 7000000000-7000001000 ---p 00000000 00:00 0 7000001000-7000801000 rw-p 00000000 00:00 0 [stack] 7000801000-7000827000 r-xp 00000000 fd:00 571555 /usr/lib/aarch64-linux-gnu/ld-linux-aarch64.so.1 7000827000-700083f000 ---p 00000000 00:00 0 700083f000-7000841000 r--p 0002e000 fd:00 571555 /usr/lib/aarch64-linux-gnu/ld-linux-aarch64.so.1 7000841000-7000843000 rw-p 00030000 fd:00 571555 /usr/lib/aarch64-linux-gnu/ld-linux-aarch64.so.1 7000843000-7000844000 r-xp 00000000 00:00 0 7000844000-7000846000 rw-p 00000000 00:00 0 7000850000-70009d7000 r-xp 00000000 fd:00 571558 /usr/lib/aarch64-linux-gnu/libc.so.6 70009d7000-70009ed000 ---p 00187000 fd:00 571558 /usr/lib/aarch64-linux-gnu/libc.so.6 70009ed000-70009f0000 r--p 0018d000 fd:00 571558 /usr/lib/aarch64-linux-gnu/libc.so.6 70009f0000-70009f2000 rw-p 00190000 fd:00 571558 /usr/lib/aarch64-linux-gnu/libc.so.6 70009f2000-70009ff000 rw-p 00000000 00:00 0 armel-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 armv7l GNU/Linux 00300000-00308000 r-xp 00000000 fd:00 801471 /usr/bin/cat 00308000-0031f000 ---p 00000000 00:00 0 0031f000-00320000 r--p 0000f000 fd:00 801471 /usr/bin/cat 00320000-00321000 rw-p 00010000 fd:00 801471 /usr/bin/cat 00321000-00342000 rw-p 00000000 00:00 0 [heap] f3000000-f3001000 ---p 00000000 00:00 0 f3001000-f3801000 rw-p 00000000 00:00 0 [stack] f3801000-f3827000 r-xp 00000000 fd:00 802599 /usr/lib/arm-linux-gnueabi/ld-linux.so.3 f3827000-f3828000 r--p 00026000 fd:00 802599 /usr/lib/arm-linux-gnueabi/ld-linux.so.3 f3828000-f3829000 rw-p 00027000 fd:00 802599 /usr/lib/arm-linux-gnueabi/ld-linux.so.3 f3829000-f382a000 r-xp 00000000 00:00 0 f382a000-f382c000 rw-p 00000000 00:00 0 f382c000-f399e000 r-xp 00000000 fd:00 802602 /usr/lib/arm-linux-gnueabi/libc.so.6 f399e000-f39a0000 r--p 00172000 fd:00 802602 /usr/lib/arm-linux-gnueabi/libc.so.6 f39a0000-f39a1000 rw-p 00174000 fd:00 802602 /usr/lib/arm-linux-gnueabi/libc.so.6 f39a1000-f39ab000 rw-p 00000000 00:00 0 ffff0000-ffff1000 r-xp 00000000 00:00 0 hppa-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 parisc GNU/Linux 00000000-00001000 --xp 00000000 00:00 0 00010000-00019000 r-xp 00000000 fd:00 1061893 /usr/bin/cat 00019000-0001a000 rwxp 00009000 fd:00 1061893 /usr/bin/cat 0001a000-0003b000 rw-p 00000000 00:00 0 [heap] f3000000-f8000000 rwxp 00000000 00:00 0 [stack] f8000000-f802f000 r-xp 00000000 fd:00 1069300 /usr/lib/hppa-linux-gnu/ld.so.1 f802f000-f8030000 r--p 0002f000 fd:00 1069300 /usr/lib/hppa-linux-gnu/ld.so.1 f8030000-f8034000 rwxp 00030000 fd:00 1069300 /usr/lib/hppa-linux-gnu/ld.so.1 f8034000-f8035000 r-xp 00000000 00:00 0 f8035000-f8037000 rw-p 00000000 00:00 0 f8037000-f81f3000 r-xp 00000000 fd:00 1069303 /usr/lib/hppa-linux-gnu/libc.so.6 f81f3000-f81f5000 r--p 001bc000 fd:00 1069303 /usr/lib/hppa-linux-gnu/libc.so.6 f81f5000-f81fa000 rwxp 001be000 fd:00 1069303 /usr/lib/hppa-linux-gnu/libc.so.6 m68k-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 m68k GNU/Linux 80000000-80007000 r-xp 00000000 fd:00 409133 /usr/bin/cat 80007000-80009000 ---p 00000000 00:00 0 80009000-8000a000 r--p 00007000 fd:00 409133 /usr/bin/cat 8000a000-8000b000 rw-p 00008000 fd:00 409133 /usr/bin/cat 8000b000-8002c000 rw-p 00000000 00:00 0 [heap] f3000000-f3001000 ---p 00000000 00:00 0 f3001000-f3801000 rw-p 00000000 00:00 0 [stack] f3801000-f3821000 r-xp 00000000 fd:00 448209 /usr/lib/m68k-linux-gnu/ld.so.1 f3821000-f3822000 ---p 00000000 00:00 0 f3822000-f3823000 r--p 00021000 fd:00 448209 /usr/lib/m68k-linux-gnu/ld.so.1 f3823000-f3825000 rw-p 00022000 fd:00 448209 /usr/lib/m68k-linux-gnu/ld.so.1 f3825000-f3826000 r-xp 00000000 00:00 0 f3826000-f3997000 r-xp 00000000 fd:00 448212 /usr/lib/m68k-linux-gnu/libc.so.6 f3997000-f3998000 ---p 00171000 fd:00 448212 /usr/lib/m68k-linux-gnu/libc.so.6 f3998000-f399a000 r--p 00170000 fd:00 448212 /usr/lib/m68k-linux-gnu/libc.so.6 f399a000-f399e000 rw-p 00172000 fd:00 448212 /usr/lib/m68k-linux-gnu/libc.so.6 f399e000-f39aa000 rw-p 00000000 00:00 0 mips64el-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 mips64 GNU/Linux 5500000000-550000b000 r-xp 00000000 fd:00 811277 /usr/bin/cat 550000b000-550001f000 ---p 00000000 00:00 0 550001f000-5500020000 r--p 0000f000 fd:00 811277 /usr/bin/cat 5500020000-5500021000 rw-p 00010000 fd:00 811277 /usr/bin/cat 5500021000-5500042000 rw-p 00000000 00:00 0 [heap] 7000000000-7000001000 ---p 00000000 00:00 0 7000001000-7000801000 rwxp 00000000 00:00 0 [stack] 7000801000-700082e000 r-xp 00000000 fd:00 812402 /usr/lib/mips64el-linux-gnuabi64/ld.so.1 700082e000-7000840000 ---p 00000000 00:00 0 7000840000-7000841000 r--p 0002f000 fd:00 812402 /usr/lib/mips64el-linux-gnuabi64/ld.so.1 7000841000-7000843000 rw-p 00030000 fd:00 812402 /usr/lib/mips64el-linux-gnuabi64/ld.so.1 7000843000-7000844000 r-xp 00000000 00:00 0 7000844000-7000846000 rw-p 00000000 00:00 0 7000850000-7000a3a000 r-xp 00000000 fd:00 812405 /usr/lib/mips64el-linux-gnuabi64/libc.so.6 7000a3a000-7000a4a000 ---p 001ea000 fd:00 812405 /usr/lib/mips64el-linux-gnuabi64/libc.so.6 7000a4a000-7000a50000 r--p 001ea000 fd:00 812405 /usr/lib/mips64el-linux-gnuabi64/libc.so.6 7000a50000-7000a55000 rw-p 001f0000 fd:00 812405 /usr/lib/mips64el-linux-gnuabi64/libc.so.6 7000a55000-7000a62000 rw-p 00000000 00:00 0 7000a68000-7000a6a000 rw-p 00000000 00:00 0 mipsel-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 mips GNU/Linux 00300000-00309000 r-xp 00000000 fd:00 818831 /usr/bin/cat 00309000-0031f000 ---p 00000000 00:00 0 0031f000-00320000 r--p 0000f000 fd:00 818831 /usr/bin/cat 00320000-00321000 rw-p 00010000 fd:00 818831 /usr/bin/cat 00321000-00342000 rw-p 00000000 00:00 0 [heap] 73000000-73001000 ---p 00000000 00:00 0 73001000-73801000 rwxp 00000000 00:00 0 [stack] 73801000-7382d000 r-xp 00000000 fd:00 819956 /usr/lib/mipsel-linux-gnu/ld.so.1 7382d000-73840000 ---p 00000000 00:00 0 73840000-73841000 r--p 0002f000 fd:00 819956 /usr/lib/mipsel-linux-gnu/ld.so.1 73841000-73842000 rw-p 00030000 fd:00 819956 /usr/lib/mipsel-linux-gnu/ld.so.1 73842000-73843000 r-xp 00000000 00:00 0 73843000-73845000 rw-p 00000000 00:00 0 73850000-73a0e000 r-xp 00000000 fd:00 819959 /usr/lib/mipsel-linux-gnu/libc.so.6 73a0e000-73a1d000 ---p 001be000 fd:00 819959 /usr/lib/mipsel-linux-gnu/libc.so.6 73a1d000-73a20000 r--p 001bd000 fd:00 819959 /usr/lib/mipsel-linux-gnu/libc.so.6 73a20000-73a23000 rw-p 001c0000 fd:00 819959 /usr/lib/mipsel-linux-gnu/libc.so.6 73a23000-73a2d000 rw-p 00000000 00:00 0 powerpc-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 ppc GNU/Linux 000c0000-002d5000 r-xp 00000000 fd:00 538459 /usr/lib/powerpc-linux-gnu/libc.so.6 002d5000-002eb000 ---p 00215000 fd:00 538459 /usr/lib/powerpc-linux-gnu/libc.so.6 002eb000-002f0000 r--p 0021b000 fd:00 538459 /usr/lib/powerpc-linux-gnu/libc.so.6 002f0000-002f1000 rw-p 00220000 fd:00 538459 /usr/lib/powerpc-linux-gnu/libc.so.6 002f1000-002fb000 rw-p 00000000 00:00 0 00300000-0030b000 r-xp 00000000 fd:00 535994 /usr/bin/cat 0030b000-0031f000 ---p 00000000 00:00 0 0031f000-00320000 r--p 0000f000 fd:00 535994 /usr/bin/cat 00320000-00321000 rw-p 00010000 fd:00 535994 /usr/bin/cat 00321000-00343000 rw-p 00000000 00:00 0 [heap] f3000000-f3001000 ---p 00000000 00:00 0 f3001000-f3801000 rw-p 00000000 00:00 0 [stack] f3801000-f3834000 r-xp 00000000 fd:00 538456 /usr/lib/powerpc-linux-gnu/ld.so.1 f3834000-f384f000 ---p 00000000 00:00 0 f384f000-f3851000 r--p 0003e000 fd:00 538456 /usr/lib/powerpc-linux-gnu/ld.so.1 f3851000-f3852000 rw-p 00040000 fd:00 538456 /usr/lib/powerpc-linux-gnu/ld.so.1 f3852000-f3853000 r-xp 00000000 00:00 0 f3853000-f3855000 rw-p 00000000 00:00 0 ppc64-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 ppc64 GNU/Linux 5500000000-550000c000 r-xp 00000000 fd:00 550284 /usr/bin/cat 550000c000-550001f000 ---p 00000000 00:00 0 550001f000-5500020000 r--p 0000f000 fd:00 550284 /usr/bin/cat 5500020000-5500021000 rw-p 00010000 fd:00 550284 /usr/bin/cat 5500021000-5500042000 rw-p 00000000 00:00 0 [heap] 7000000000-7000001000 ---p 00000000 00:00 0 7000001000-7000801000 rw-p 00000000 00:00 0 [stack] 7000801000-7000847000 r-xp 00000000 fd:00 551358 /usr/lib/powerpc64-linux-gnu/ld64.so.1 7000847000-700085e000 ---p 00000000 00:00 0 700085e000-7000861000 r--p 0004d000 fd:00 551358 /usr/lib/powerpc64-linux-gnu/ld64.so.1 7000861000-7000863000 rw-p 00050000 fd:00 551358 /usr/lib/powerpc64-linux-gnu/ld64.so.1 7000863000-7000864000 r-xp 00000000 00:00 0 7000870000-7000a7a000 r-xp 00000000 fd:00 551361 /usr/lib/powerpc64-linux-gnu/libc.so.6 7000a7a000-7000a87000 ---p 0020a000 fd:00 551361 /usr/lib/powerpc64-linux-gnu/libc.so.6 7000a87000-7000aa0000 r--p 00217000 fd:00 551361 /usr/lib/powerpc64-linux-gnu/libc.so.6 7000aa0000-7000aa2000 rw-p 00230000 fd:00 551361 /usr/lib/powerpc64-linux-gnu/libc.so.6 7000aa2000-7000aaf000 rw-p 00000000 00:00 0 7000ab3000-7000ab5000 rw-p 00000000 00:00 0 ppc64el-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 ppc64le GNU/Linux 5500000000-550000b000 r-xp 00000000 fd:00 826393 /usr/bin/cat 550000b000-550001f000 ---p 00000000 00:00 0 550001f000-5500020000 r--p 0000f000 fd:00 826393 /usr/bin/cat 5500020000-5500021000 rw-p 00010000 fd:00 826393 /usr/bin/cat 5500021000-5500042000 rw-p 00000000 00:00 0 [heap] 7000000000-7000001000 ---p 00000000 00:00 0 7000001000-7000801000 rw-p 00000000 00:00 0 [stack] 7000801000-700084e000 r-xp 00000000 fd:00 827518 /usr/lib/powerpc64le-linux-gnu/ld64.so.2 700084e000-700085f000 ---p 00000000 00:00 0 700085f000-7000861000 r--p 0004e000 fd:00 827518 /usr/lib/powerpc64le-linux-gnu/ld64.so.2 7000861000-7000863000 rw-p 00050000 fd:00 827518 /usr/lib/powerpc64le-linux-gnu/ld64.so.2 7000863000-7000864000 r-xp 00000000 00:00 0 7000870000-7000aa4000 r-xp 00000000 fd:00 827521 /usr/lib/powerpc64le-linux-gnu/libc.so.6 7000aa4000-7000abc000 ---p 00234000 fd:00 827521 /usr/lib/powerpc64le-linux-gnu/libc.so.6 7000abc000-7000ac0000 r--p 0023c000 fd:00 827521 /usr/lib/powerpc64le-linux-gnu/libc.so.6 7000ac0000-7000ac2000 rw-p 00240000 fd:00 827521 /usr/lib/powerpc64le-linux-gnu/libc.so.6 7000ac2000-7000acf000 rw-p 00000000 00:00 0 7000ad3000-7000ad5000 rw-p 00000000 00:00 0 s390x-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 s390x GNU/Linux 5500000000-550000a000 r-xp 00000000 fd:00 833950 /usr/bin/cat 550000a000-550000b000 r--p 00009000 fd:00 833950 /usr/bin/cat 550000b000-550000c000 rw-p 0000a000 fd:00 833950 /usr/bin/cat 550000c000-550002d000 rw-p 00000000 00:00 0 [heap] 7000000000-7000001000 ---p 00000000 00:00 0 7000001000-7000801000 rw-p 00000000 00:00 0 [stack] 7000801000-700082b000 r-xp 00000000 fd:00 835075 /usr/lib/s390x-linux-gnu/ld64.so.1 700082b000-700082d000 r--p 00029000 fd:00 835075 /usr/lib/s390x-linux-gnu/ld64.so.1 700082d000-700082f000 rw-p 0002b000 fd:00 835075 /usr/lib/s390x-linux-gnu/ld64.so.1 700082f000-7000830000 r-xp 00000000 00:00 0 7000830000-70009f1000 r-xp 00000000 fd:00 835078 /usr/lib/s390x-linux-gnu/libc.so.6 70009f1000-70009f5000 r--p 001c1000 fd:00 835078 /usr/lib/s390x-linux-gnu/libc.so.6 70009f5000-70009f7000 rw-p 001c5000 fd:00 835078 /usr/lib/s390x-linux-gnu/libc.so.6 70009f7000-7000a06000 rw-p 00000000 00:00 0 sh4-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 sh4 GNU/Linux 00400000-00407000 r-xp 00000000 fd:00 557846 /usr/bin/cat 00407000-0041f000 ---p 00000000 00:00 0 0041f000-00420000 r--p 0000f000 fd:00 557846 /usr/bin/cat 00420000-00421000 rw-p 00010000 fd:00 557846 /usr/bin/cat 00421000-00442000 rw-p 00000000 00:00 0 [heap] 73000000-73001000 ---p 00000000 00:00 0 73001000-73801000 rw-p 00000000 00:00 0 [stack] 73801000-73822000 r-xp 00000000 fd:00 558920 /usr/lib/sh4-linux-gnu/ld-linux.so.2 73822000-73840000 ---p 00000000 00:00 0 73840000-73841000 r--p 0002f000 fd:00 558920 /usr/lib/sh4-linux-gnu/ld-linux.so.2 73841000-73842000 rw-p 00030000 fd:00 558920 /usr/lib/sh4-linux-gnu/ld-linux.so.2 73842000-73843000 r-xp 00000000 00:00 0 73843000-73845000 rw-p 00000000 00:00 0 73850000-739b8000 r-xp 00000000 fd:00 558923 /usr/lib/sh4-linux-gnu/libc.so.6 739b8000-739ce000 ---p 00168000 fd:00 558923 /usr/lib/sh4-linux-gnu/libc.so.6 739ce000-739d0000 r--p 0016e000 fd:00 558923 /usr/lib/sh4-linux-gnu/libc.so.6 739d0000-739d1000 rw-p 00170000 fd:00 558923 /usr/lib/sh4-linux-gnu/libc.so.6 739d1000-739db000 rw-p 00000000 00:00 0 sparc64-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 sparc64 GNU/Linux 5500000000-5500008000 r-xp 00000000 fd:00 565395 /usr/bin/cat 5500008000-55001fe000 ---p 00000000 00:00 0 55001fe000-5500200000 r--p 000fe000 fd:00 565395 /usr/bin/cat 5500200000-5500202000 rwxp 00100000 fd:00 565395 /usr/bin/cat 5500202000-5500224000 rw-p 00000000 00:00 0 [heap] 7000000000-7000002000 ---p 00000000 00:00 0 7000002000-7000802000 rw-p 00000000 00:00 0 [stack] 7000802000-700082a000 r-xp 00000000 fd:00 525238 /usr/lib/sparc64-linux-gnu/ld-linux.so.2 700082a000-7000a00000 ---p 00000000 00:00 0 7000a00000-7000a02000 r--p 000fe000 fd:00 525238 /usr/lib/sparc64-linux-gnu/ld-linux.so.2 7000a02000-7000a04000 rw-p 00100000 fd:00 525238 /usr/lib/sparc64-linux-gnu/ld-linux.so.2 7000a04000-7000a08000 rw-p 00000000 00:00 0 7000b00000-7000c8c000 r-xp 00000000 fd:00 525241 /usr/lib/sparc64-linux-gnu/libc.so.6 7000c8c000-7000d04000 ---p 0018c000 fd:00 525241 /usr/lib/sparc64-linux-gnu/libc.so.6 7000d04000-7000dfc000 ---p 00000000 00:00 0 7000dfc000-7000e00000 r--p 001fc000 fd:00 525241 /usr/lib/sparc64-linux-gnu/libc.so.6 7000e00000-7000e04000 rwxp 00200000 fd:00 525241 /usr/lib/sparc64-linux-gnu/libc.so.6 7000e04000-7000e10000 rwxp 00000000 00:00 0 7ff864000000-7ff864000000 ---p 00000000 00:00 0 7ff86b000000-7ff86b000000 ---p 00000000 00:00 0 ------------------------------------------------------------------------------------ Memory layout from git head (without this patch series) alpha-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 alpha GNU/Linux 120000000-12000a000 r-xp 00000000 fd:00 417269 /usr/bin/cat 12000a000-12001e000 ---p 00000000 00:00 0 12001e000-120020000 r--p 0000e000 fd:00 417269 /usr/bin/cat 120020000-120021000 rw-p 00000000 00:00 0 120021000-120044000 rw-p 00000000 00:00 0 4000000000-4000002000 ---p 00000000 00:00 0 4000002000-4000802000 rw-p 00000000 00:00 0 [stack] 4000802000-4000830000 r-xp 00000000 fd:00 421566 /usr/lib/alpha-linux-gnu/ld-linux.so.2 4000830000-4000840000 ---p 00000000 00:00 0 4000840000-4000842000 r--p 0002e000 fd:00 421566 /usr/lib/alpha-linux-gnu/ld-linux.so.2 4000842000-4000844000 rw-p 00030000 fd:00 421566 /usr/lib/alpha-linux-gnu/ld-linux.so.2 4000844000-4000846000 r-xp 00000000 00:00 0 4000850000-4000a30000 r-xp 00000000 fd:00 421569 /usr/lib/alpha-linux-gnu/libc.so.6.1 4000a30000-4000a3c000 ---p 001e0000 fd:00 421569 /usr/lib/alpha-linux-gnu/libc.so.6.1 4000a3c000-4000a40000 r--p 001ec000 fd:00 421569 /usr/lib/alpha-linux-gnu/libc.so.6.1 4000a40000-4000a42000 rw-p 001f0000 fd:00 421569 /usr/lib/alpha-linux-gnu/libc.so.6.1 4000a42000-4000a50000 rw-p 00000000 00:00 0 4000a56000-4000a5a000 rw-p 00000000 00:00 0 arm64-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 aarch64 GNU/Linux 5500000000-5500009000 r-xp 00000000 fd:00 570430 /usr/bin/cat 5500009000-550001f000 ---p 00000000 00:00 0 550001f000-5500020000 r--p 0000f000 fd:00 570430 /usr/bin/cat 5500020000-5500021000 rw-p 00010000 fd:00 570430 /usr/bin/cat 5500021000-5500042000 rw-p 00000000 00:00 0 5502021000-5502022000 ---p 00000000 00:00 0 5502022000-5502822000 rw-p 00000000 00:00 0 [stack] 5502822000-5502848000 r-xp 00000000 fd:00 571555 /usr/lib/aarch64-linux-gnu/ld-linux-aarch64.so.1 5502848000-5502860000 ---p 00000000 00:00 0 5502860000-5502862000 r--p 0002e000 fd:00 571555 /usr/lib/aarch64-linux-gnu/ld-linux-aarch64.so.1 5502862000-5502864000 rw-p 00030000 fd:00 571555 /usr/lib/aarch64-linux-gnu/ld-linux-aarch64.so.1 5502864000-5502865000 r-xp 00000000 00:00 0 5502865000-5502867000 rw-p 00000000 00:00 0 5502870000-55029f7000 r-xp 00000000 fd:00 571558 /usr/lib/aarch64-linux-gnu/libc.so.6 55029f7000-5502a0d000 ---p 00187000 fd:00 571558 /usr/lib/aarch64-linux-gnu/libc.so.6 5502a0d000-5502a10000 r--p 0018d000 fd:00 571558 /usr/lib/aarch64-linux-gnu/libc.so.6 5502a10000-5502a12000 rw-p 00190000 fd:00 571558 /usr/lib/aarch64-linux-gnu/libc.so.6 5502a12000-5502a1f000 rw-p 00000000 00:00 0 armel-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 armv7l GNU/Linux 40000000-40008000 r-xp 00000000 fd:00 801471 /usr/bin/cat 40008000-4001f000 ---p 00000000 00:00 0 4001f000-40020000 r--p 0000f000 fd:00 801471 /usr/bin/cat 40020000-40021000 rw-p 00010000 fd:00 801471 /usr/bin/cat 40021000-40023000 rw-p 00000000 00:00 0 40023000-40195000 r-xp 00000000 fd:00 802602 /usr/lib/arm-linux-gnueabi/libc.so.6 40195000-40197000 r--p 00172000 fd:00 802602 /usr/lib/arm-linux-gnueabi/libc.so.6 40197000-40198000 rw-p 00174000 fd:00 802602 /usr/lib/arm-linux-gnueabi/libc.so.6 40198000-402a2000 rw-p 00000000 00:00 0 41021000-41022000 ---p 00000000 00:00 0 41022000-41822000 rw-p 00000000 00:00 0 [stack] 41822000-41848000 r-xp 00000000 fd:00 802599 /usr/lib/arm-linux-gnueabi/ld-linux.so.3 41848000-41849000 r--p 00026000 fd:00 802599 /usr/lib/arm-linux-gnueabi/ld-linux.so.3 41849000-4184a000 rw-p 00027000 fd:00 802599 /usr/lib/arm-linux-gnueabi/ld-linux.so.3 4184a000-4184b000 r-xp 00000000 00:00 0 ffff0000-ffff1000 r-xp 00000000 00:00 0 hppa-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 parisc GNU/Linux 0-1000 --xp 00000000 00:00 0 10000-19000 r-xp 00000000 fd:00 1061893 /usr/bin/cat 19000-1a000 rwxp 00009000 fd:00 1061893 /usr/bin/cat 1a000-3b000 rw-p 00000000 00:00 0 fa000000-ff000000 rwxp 00000000 00:00 0 [stack] ff000000-ff02f000 r-xp 00000000 fd:00 1062984 /usr/lib/hppa-linux-gnu/ld.so.1 ff02f000-ff030000 r--p 0002f000 fd:00 1062984 /usr/lib/hppa-linux-gnu/ld.so.1 ff030000-ff034000 rwxp 00030000 fd:00 1062984 /usr/lib/hppa-linux-gnu/ld.so.1 ff034000-ff035000 r-xp 00000000 00:00 0 ff035000-ff037000 rw-p 00000000 00:00 0 ff037000-ff1f3000 r-xp 00000000 fd:00 1062987 /usr/lib/hppa-linux-gnu/libc.so.6 ff1f3000-ff1f5000 r--p 001bc000 fd:00 1062987 /usr/lib/hppa-linux-gnu/libc.so.6 ff1f5000-ff1fa000 rwxp 001be000 fd:00 1062987 /usr/lib/hppa-linux-gnu/libc.so.6 m68k-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 m68k GNU/Linux 40000000-40001000 ---p 00000000 00:00 0 40001000-40801000 rw-p 00000000 00:00 0 [stack] 40801000-40821000 r-xp 00000000 fd:00 448209 /usr/lib/m68k-linux-gnu/ld.so.1 40821000-40822000 ---p 00000000 00:00 0 40822000-40823000 r--p 00021000 fd:00 448209 /usr/lib/m68k-linux-gnu/ld.so.1 40823000-40825000 rw-p 00022000 fd:00 448209 /usr/lib/m68k-linux-gnu/ld.so.1 40825000-40826000 r-xp 00000000 00:00 0 40826000-40997000 r-xp 00000000 fd:00 448212 /usr/lib/m68k-linux-gnu/libc.so.6 40997000-40998000 ---p 00171000 fd:00 448212 /usr/lib/m68k-linux-gnu/libc.so.6 40998000-4099a000 r--p 00170000 fd:00 448212 /usr/lib/m68k-linux-gnu/libc.so.6 4099a000-4099e000 rw-p 00172000 fd:00 448212 /usr/lib/m68k-linux-gnu/libc.so.6 4099e000-409aa000 rw-p 00000000 00:00 0 80000000-80007000 r-xp 00000000 fd:00 409133 /usr/bin/cat 80007000-80009000 ---p 00000000 00:00 0 80009000-8000a000 r--p 00007000 fd:00 409133 /usr/bin/cat 8000a000-8000b000 rw-p 00008000 fd:00 409133 /usr/bin/cat 8000b000-8002c000 rw-p 00000000 00:00 0 mips64el-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 mips64 GNU/Linux 4000000000-400000b000 r-xp 00000000 fd:00 811277 /usr/bin/cat 400000b000-400001f000 ---p 00000000 00:00 0 400001f000-4000020000 r--p 0000f000 fd:00 811277 /usr/bin/cat 4000020000-4000021000 rw-p 00010000 fd:00 811277 /usr/bin/cat 4000021000-4000042000 rw-p 00000000 00:00 0 4002021000-4002022000 ---p 00000000 00:00 0 4002022000-4002822000 rwxp 00000000 00:00 0 [stack] 4002822000-400284f000 r-xp 00000000 fd:00 812402 /usr/lib/mips64el-linux-gnuabi64/ld.so.1 400284f000-4002861000 ---p 00000000 00:00 0 4002861000-4002862000 r--p 0002f000 fd:00 812402 /usr/lib/mips64el-linux-gnuabi64/ld.so.1 4002862000-4002864000 rw-p 00030000 fd:00 812402 /usr/lib/mips64el-linux-gnuabi64/ld.so.1 4002864000-4002865000 r-xp 00000000 00:00 0 4002865000-4002867000 rw-p 00000000 00:00 0 4002870000-4002a5a000 r-xp 00000000 fd:00 812405 /usr/lib/mips64el-linux-gnuabi64/libc.so.6 4002a5a000-4002a6a000 ---p 001ea000 fd:00 812405 /usr/lib/mips64el-linux-gnuabi64/libc.so.6 4002a6a000-4002a70000 r--p 001ea000 fd:00 812405 /usr/lib/mips64el-linux-gnuabi64/libc.so.6 4002a70000-4002a75000 rw-p 001f0000 fd:00 812405 /usr/lib/mips64el-linux-gnuabi64/libc.so.6 4002a75000-4002a82000 rw-p 00000000 00:00 0 4002a89000-4002a8b000 rw-p 00000000 00:00 0 mipsel-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 mips GNU/Linux 40000000-40009000 r-xp 00000000 fd:00 818831 /usr/bin/cat 40009000-4001f000 ---p 00000000 00:00 0 4001f000-40020000 r--p 0000f000 fd:00 818831 /usr/bin/cat 40020000-40021000 rw-p 00010000 fd:00 818831 /usr/bin/cat 40021000-40023000 rw-p 00000000 00:00 0 40030000-401ee000 r-xp 00000000 fd:00 819959 /usr/lib/mipsel-linux-gnu/libc.so.6 401ee000-401fd000 ---p 001be000 fd:00 819959 /usr/lib/mipsel-linux-gnu/libc.so.6 401fd000-40200000 r--p 001bd000 fd:00 819959 /usr/lib/mipsel-linux-gnu/libc.so.6 40200000-40203000 rw-p 001c0000 fd:00 819959 /usr/lib/mipsel-linux-gnu/libc.so.6 40203000-4030d000 rw-p 00000000 00:00 0 41021000-41022000 ---p 00000000 00:00 0 41022000-41822000 rwxp 00000000 00:00 0 [stack] 41822000-4184e000 r-xp 00000000 fd:00 819956 /usr/lib/mipsel-linux-gnu/ld.so.1 4184e000-41861000 ---p 00000000 00:00 0 41861000-41862000 r--p 0002f000 fd:00 819956 /usr/lib/mipsel-linux-gnu/ld.so.1 41862000-41863000 rw-p 00030000 fd:00 819956 /usr/lib/mipsel-linux-gnu/ld.so.1 41863000-41864000 r-xp 00000000 00:00 0 powerpc-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 ppc GNU/Linux 3fdc0000-3ffd5000 r-xp 00000000 fd:00 538459 /usr/lib/powerpc-linux-gnu/libc.so.6 3ffd5000-3ffeb000 ---p 00215000 fd:00 538459 /usr/lib/powerpc-linux-gnu/libc.so.6 3ffeb000-3fff0000 r--p 0021b000 fd:00 538459 /usr/lib/powerpc-linux-gnu/libc.so.6 3fff0000-3fff1000 rw-p 00220000 fd:00 538459 /usr/lib/powerpc-linux-gnu/libc.so.6 3fff1000-3fffb000 rw-p 00000000 00:00 0 40000000-4000b000 r-xp 00000000 fd:00 535994 /usr/bin/cat 4000b000-4001f000 ---p 00000000 00:00 0 4001f000-40020000 r--p 0000f000 fd:00 535994 /usr/bin/cat 40020000-40021000 rw-p 00010000 fd:00 535994 /usr/bin/cat 40021000-40123000 rw-p 00000000 00:00 0 41021000-41022000 ---p 00000000 00:00 0 41022000-41822000 rw-p 00000000 00:00 0 [stack] 41822000-41855000 r-xp 00000000 fd:00 538456 /usr/lib/powerpc-linux-gnu/ld.so.1 41855000-41870000 ---p 00000000 00:00 0 41870000-41872000 r--p 0003e000 fd:00 538456 /usr/lib/powerpc-linux-gnu/ld.so.1 41872000-41873000 rw-p 00040000 fd:00 538456 /usr/lib/powerpc-linux-gnu/ld.so.1 41873000-41874000 r-xp 00000000 00:00 0 ppc64-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 ppc64 GNU/Linux 4000000000-400000c000 r-xp 00000000 fd:00 550284 /usr/bin/cat 400000c000-400001f000 ---p 00000000 00:00 0 400001f000-4000020000 r--p 0000f000 fd:00 550284 /usr/bin/cat 4000020000-4000021000 rw-p 00010000 fd:00 550284 /usr/bin/cat 4000021000-4000042000 rw-p 00000000 00:00 0 4002021000-4002022000 ---p 00000000 00:00 0 4002022000-4002822000 rw-p 00000000 00:00 0 [stack] 4002822000-4002868000 r-xp 00000000 fd:00 551358 /usr/lib/powerpc64-linux-gnu/ld64.so.1 4002868000-400287f000 ---p 00000000 00:00 0 400287f000-4002882000 r--p 0004d000 fd:00 551358 /usr/lib/powerpc64-linux-gnu/ld64.so.1 4002882000-4002884000 rw-p 00050000 fd:00 551358 /usr/lib/powerpc64-linux-gnu/ld64.so.1 4002884000-4002885000 r-xp 00000000 00:00 0 4002890000-4002a9a000 r-xp 00000000 fd:00 551361 /usr/lib/powerpc64-linux-gnu/libc.so.6 4002a9a000-4002aa7000 ---p 0020a000 fd:00 551361 /usr/lib/powerpc64-linux-gnu/libc.so.6 4002aa7000-4002ac0000 r--p 00217000 fd:00 551361 /usr/lib/powerpc64-linux-gnu/libc.so.6 4002ac0000-4002ac2000 rw-p 00230000 fd:00 551361 /usr/lib/powerpc64-linux-gnu/libc.so.6 4002ac2000-4002acf000 rw-p 00000000 00:00 0 4002ad4000-4002ad6000 rw-p 00000000 00:00 0 ppc64el-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 ppc64le GNU/Linux 4000000000-400000b000 r-xp 00000000 fd:00 826393 /usr/bin/cat 400000b000-400001f000 ---p 00000000 00:00 0 400001f000-4000020000 r--p 0000f000 fd:00 826393 /usr/bin/cat 4000020000-4000021000 rw-p 00010000 fd:00 826393 /usr/bin/cat 4000021000-4000042000 rw-p 00000000 00:00 0 4002021000-4002022000 ---p 00000000 00:00 0 4002022000-4002822000 rw-p 00000000 00:00 0 [stack] 4002822000-400286f000 r-xp 00000000 fd:00 827518 /usr/lib/powerpc64le-linux-gnu/ld64.so.2 400286f000-4002880000 ---p 00000000 00:00 0 4002880000-4002882000 r--p 0004e000 fd:00 827518 /usr/lib/powerpc64le-linux-gnu/ld64.so.2 4002882000-4002884000 rw-p 00050000 fd:00 827518 /usr/lib/powerpc64le-linux-gnu/ld64.so.2 4002884000-4002885000 r-xp 00000000 00:00 0 4002890000-4002ac4000 r-xp 00000000 fd:00 827521 /usr/lib/powerpc64le-linux-gnu/libc.so.6 4002ac4000-4002adc000 ---p 00234000 fd:00 827521 /usr/lib/powerpc64le-linux-gnu/libc.so.6 4002adc000-4002ae0000 r--p 0023c000 fd:00 827521 /usr/lib/powerpc64le-linux-gnu/libc.so.6 4002ae0000-4002ae2000 rw-p 00240000 fd:00 827521 /usr/lib/powerpc64le-linux-gnu/libc.so.6 4002ae2000-4002aef000 rw-p 00000000 00:00 0 4002af4000-4002af6000 rw-p 00000000 00:00 0 s390x-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 s390x GNU/Linux 4000000000-400000a000 r-xp 00000000 fd:00 833950 /usr/bin/cat 400000a000-400000b000 r--p 00009000 fd:00 833950 /usr/bin/cat 400000b000-400000c000 rw-p 0000a000 fd:00 833950 /usr/bin/cat 400000c000-400002d000 rw-p 00000000 00:00 0 400200c000-400200d000 ---p 00000000 00:00 0 400200d000-400280d000 rw-p 00000000 00:00 0 [stack] 400280d000-4002837000 r-xp 00000000 fd:00 835075 /usr/lib/s390x-linux-gnu/ld64.so.1 4002837000-4002839000 r--p 00029000 fd:00 835075 /usr/lib/s390x-linux-gnu/ld64.so.1 4002839000-400283b000 rw-p 0002b000 fd:00 835075 /usr/lib/s390x-linux-gnu/ld64.so.1 400283b000-400283c000 r-xp 00000000 00:00 0 400283c000-40029fd000 r-xp 00000000 fd:00 835078 /usr/lib/s390x-linux-gnu/libc.so.6 40029fd000-4002a01000 r--p 001c1000 fd:00 835078 /usr/lib/s390x-linux-gnu/libc.so.6 4002a01000-4002a03000 rw-p 001c5000 fd:00 835078 /usr/lib/s390x-linux-gnu/libc.so.6 4002a03000-4002a12000 rw-p 00000000 00:00 0 sh4-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 sh4 GNU/Linux 400000-407000 r-xp 00000000 fd:00 557846 /usr/bin/cat 407000-41f000 ---p 00000000 00:00 0 41f000-420000 r--p 0000f000 fd:00 557846 /usr/bin/cat 420000-421000 rw-p 00010000 fd:00 557846 /usr/bin/cat 421000-442000 rw-p 00000000 00:00 0 40000000-40001000 ---p 00000000 00:00 0 40001000-40801000 rw-p 00000000 00:00 0 [stack] 40801000-40822000 r-xp 00000000 fd:00 558920 /usr/lib/sh4-linux-gnu/ld-linux.so.2 40822000-40840000 ---p 00000000 00:00 0 40840000-40841000 r--p 0002f000 fd:00 558920 /usr/lib/sh4-linux-gnu/ld-linux.so.2 40841000-40842000 rw-p 00030000 fd:00 558920 /usr/lib/sh4-linux-gnu/ld-linux.so.2 40842000-40843000 r-xp 00000000 00:00 0 40843000-40845000 rw-p 00000000 00:00 0 40850000-409b8000 r-xp 00000000 fd:00 558923 /usr/lib/sh4-linux-gnu/libc.so.6 409b8000-409ce000 ---p 00168000 fd:00 558923 /usr/lib/sh4-linux-gnu/libc.so.6 409ce000-409d0000 r--p 0016e000 fd:00 558923 /usr/lib/sh4-linux-gnu/libc.so.6 409d0000-409d1000 rw-p 00170000 fd:00 558923 /usr/lib/sh4-linux-gnu/libc.so.6 409d1000-409db000 rw-p 00000000 00:00 0 sparc64-chroot Linux p100 6.4.4-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jul 19 16:32:49 UTC 2023 sparc64 GNU/Linux 4000000000-4000008000 r-xp 00000000 fd:00 565395 /usr/bin/cat 4000008000-40001fe000 ---p 00000000 00:00 0 40001fe000-4000200000 r--p 000fe000 fd:00 565395 /usr/bin/cat 4000200000-4000201000 rwxp 00100000 fd:00 565395 /usr/bin/cat 4002202000-4002204000 ---p 00000000 00:00 0 4002204000-4002a04000 rw-p 00000000 00:00 0 [stack] 4002a04000-4002a2c000 r-xp 00000000 fd:00 525238 /usr/lib/sparc64-linux-gnu/ld-linux.so.2 4002a2c000-4002c02000 ---p 00000000 00:00 0 4002c02000-4002c04000 r--p 000fe000 fd:00 525238 /usr/lib/sparc64-linux-gnu/ld-linux.so.2 4002c04000-4002c06000 rw-p 00100000 fd:00 525238 /usr/lib/sparc64-linux-gnu/ld-linux.so.2 4002c06000-4002c0a000 rw-p 00000000 00:00 0 4002d00000-4002e8c000 r-xp 00000000 fd:00 525241 /usr/lib/sparc64-linux-gnu/libc.so.6 4002e8c000-4002f04000 ---p 0018c000 fd:00 525241 /usr/lib/sparc64-linux-gnu/libc.so.6 4002f04000-4002ffc000 ---p 00000000 00:00 0 4002ffc000-4003000000 r--p 001fc000 fd:00 525241 /usr/lib/sparc64-linux-gnu/libc.so.6 4003000000-4003004000 rwxp 00200000 fd:00 525241 /usr/lib/sparc64-linux-gnu/libc.so.6 4003004000-4003010000 rwxp 00000000 00:00 0 Helge Deller (3): linux-user: Show heap address in /proc/pid/maps linux-user: Optimize memory layout for static and dynamic executables linux-user: Load pie executables at upper memory include/exec/cpu_ldst.h | 4 +-- linux-user/elfload.c | 59 +++++++++++++---------------------------- linux-user/loader.h | 12 +++++++++ linux-user/main.c | 2 ++ linux-user/mmap.c | 33 ++++++++++++----------- linux-user/qemu.h | 4 +-- linux-user/syscall.c | 13 ++++++--- 7 files changed, 64 insertions(+), 63 deletions(-) -- 2.41.0
On Fri, 28 Jul 2023 at 18:58, Helge Deller <deller@gmx.de> wrote:
>
> While trying to fix a bug which prevents running a static
> armhf binary with linux-user, I noticed a whole bunch of
> memory layout issues on various platforms. Most noteably
> the free heap space was very limited in the current setup.
> A large heap is important for example, if you want to
> use qemu-user for building Linux packages where gcc requires
> lots of space (e.g. using qemu-user as buildd for debian
> packages).
>
> Those findings led to this patch series, which
> - fixes qemu-arm to run static armhf binaries
Applying this on top of master and trying to run a simple armhf binary
on a ppc64le host fails:
qemu$ ./build/qemu-arm -d guest_errors,page,strace ~/hello-armhf
host mmap_min_addr=0x10000
pgb_find_hole: base @ 10000 for 4294967296 bytes
pgb_static: base @ 10000 for 4294967295 bytes
pgb_reserved_va: base @ 0x10000 for 4294967296 bytes
Locating guest address space @ 0x10000
page layout changed following mmap
start end size prot
00010000-00060000 00050000 ---
00060000-00066000 00006000 ---
ffff0000-00000000 00010000 r-x
page layout changed following mmap
start end size prot
00010000-00060000 00050000 r-x
00060000-00066000 00006000 ---
ffff0000-00000000 00010000 r-x
page layout changed following mmap
start end size prot
00010000-00060000 00050000 r-x
00060000-00064000 00004000 rw-
00064000-00066000 00002000 ---
ffff0000-00000000 00010000 r-x
page layout changed following mmap
start end size prot
00010000-00060000 00050000 r-x
00060000-00064000 00004000 rw-
00064000-00066000 00002000 rw-
f3000000-f3810000 00810000 rw-
ffff0000-00000000 00010000 r-x
page layout changed following mmap
start end size prot
00010000-00060000 00050000 r-x
00060000-00064000 00004000 rw-
00064000-00066000 00002000 rw-
f3000000-f3010000 00010000 ---
f3010000-f3811000 00801000 rw-
ffff0000-00000000 00010000 r-x
guest_base 0x10000
page layout changed following binary load
start end size prot
00010000-00060000 00050000 r-x
00060000-00064000 00004000 rw-
00064000-00066000 00002000 rw-
f3000000-f3010000 00010000 ---
f3010000-f3810000 00800000 rw-
f3810000-f3811000 00001000 r-x
ffff0000-00000000 00010000 r-x
start_brk 0x00000000
end_code 0x0005f9c8
start_code 0x00010000
start_data 0x00060414
end_data 0x0006327c
start_stack 0xf380f420
brk 0x00066000
entry 0x00010341
argv_start 0xf380f424
env_start 0xf380f42c
auxv_start 0xf380f4a8
95718 brk(NULL) = 0x00066000
95718 brk(0x00066874) = 0x00066874
95718 set_tid_address(0x66068) = 95718
95718 set_robust_list(0x6606c,12) = -1 errno=38 (Function not implemented)
95718 Unknown syscall 398
95718 ugetrlimit(3,-209652764,328608,404128,401408,1) = 0
95718 readlinkat(AT_FDCWD,"/proc/self/exe",0xf380e390,4096) = 22
95718 getrandom(0x65940,4,1) = 4
95718 brk(NULL) = 0x00066874
95718 brk(0x00087874)page layout changed following mmap
start end size prot
00010000-00060000 00050000 r-x
00060000-00064000 00004000 rw-
00064000-00066000 00002000 rw-
00070000-00090000 00020000 rw-
f3000000-f3010000 00010000 ---
f3010000-f3810000 00800000 rw-
f3810000-f3811000 00001000 r-x
ffff0000-00000000 00010000 r-x
= 0x00087874
95718 brk(0x00088000) = 0x00088000
95718 mprotect(0x00060000,8192,PROT_READ) = 0
95718 statx(1,"",AT_EMPTY_PATH|AT_NO_AUTOMOUNT|AT_STATX_SYNC_AS_STAT,STATX_BASIC_STATS,0xf380f078)
= 0
95718 write(1,0x66b08,14) = -1 errno=14 (Bad address)
95718 exit_group(0)
A working arm binary by comparison:
qemu$ ./build/qemu-arm -d guest_errors,page,strace ~/hello
host mmap_min_addr=0x10000
pgb_find_hole: base @ 10000 for 4294967296 bytes
pgb_static: base @ 10000 for 4294967295 bytes
pgb_reserved_va: base @ 0x10000 for 4294967296 bytes
Locating guest address space @ 0x10000
page layout changed following mmap
start end size prot
00010000-00090000 00080000 ---
00090000-0009b000 0000b000 ---
ffff0000-00000000 00010000 r-x
page layout changed following mmap
start end size prot
00010000-00090000 00080000 r-x
00090000-0009b000 0000b000 ---
ffff0000-00000000 00010000 r-x
page layout changed following mmap
start end size prot
00010000-00090000 00080000 r-x
00090000-000a0000 00010000 rw-
ffff0000-00000000 00010000 r-x
page layout changed following mmap
start end size prot
00010000-00090000 00080000 r-x
00090000-000a0000 00010000 rw-
f3000000-f3810000 00810000 rw-
ffff0000-00000000 00010000 r-x
page layout changed following mmap
start end size prot
00010000-00090000 00080000 r-x
00090000-000a0000 00010000 rw-
f3000000-f3010000 00010000 ---
f3010000-f3811000 00801000 rw-
ffff0000-00000000 00010000 r-x
guest_base 0x10000
page layout changed following binary load
start end size prot
00010000-00090000 00080000 r-x
00090000-000a0000 00010000 rw-
f3000000-f3010000 00010000 ---
f3010000-f3810000 00800000 rw-
f3810000-f3811000 00001000 r-x
ffff0000-00000000 00010000 r-x
start_brk 0x00000000
end_code 0x00084f7c
start_code 0x00010000
start_data 0x00095098
end_data 0x00098394
start_stack 0xf380f430
brk 0x0009b000
entry 0x00010418
argv_start 0xf380f434
env_start 0xf380f43c
auxv_start 0xf380f4b8
95733 brk(NULL) = 0x0009b000
95733 brk(0x0009b8fc) = 0x0009b8fc
95733 set_tid_address(0x9b068) = 95733
95733 set_robust_list(0x9b070,12) = -1 errno=38 (Function not implemented)
95733 Unknown syscall 398
95733 uname(0xfffffffff380f270) = 0
95733 ugetrlimit(3,-209652756,469816,622616,618496,1) = 0
95733 readlink("/proc/self/exe",0xf380e380,4096) = 16
95733 getrandom(0x9ab10,4,1) = 4
95733 brk(0x000cb8fc)page layout changed following mmap
start end size prot
00010000-00090000 00080000 r-x
00090000-000a0000 00010000 rw-
000a0000-000d0000 00030000 rw-
f3000000-f3010000 00010000 ---
f3010000-f3810000 00800000 rw-
f3810000-f3811000 00001000 r-x
ffff0000-00000000 00010000 r-x
= 0x000cb8fc
95733 brk(0x000d0000) = 0x000d0000
95733 statx(1,"",AT_EMPTY_PATH|AT_NO_AUTOMOUNT|AT_STATX_SYNC_AS_STAT,STATX_BASIC_STATS,0xf380f0b8)
= 0
95733 write(1,0x9bb90,14)Hello, World!
= 14
95733 exit_group(0)
The test program is:
#include <stdio.h>
int main() { printf("Hello, World!\n");}
Built like this:
arm-linux-gnueabihf-gcc -o hello-armhf hello.c -static
arm-linux-gnueabi-gcc -o hello hello.c -static
on an Ubuntu 23.04 host.
Cheers,
Joel
28.07.2023 20:31, Helge Deller wrote: > NOTE: > - this patch series is for qemu v8.1.0-rc ONLY. > - do not apply on top of v8.0-stable series, which uses > a different search algorithm for free mmap memory > and thus will give incorrect memory layouts. Hm. I included a previous version of this patchset in debian qemu 8.0 package. Wonder what should we do on 8.0 and on debian.. /mjt
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