diff options
Diffstat (limited to 'gitlab/issues_text/target_sh4/host_missing/accel_missing')
5 files changed, 135 insertions, 0 deletions
diff --git a/gitlab/issues_text/target_sh4/host_missing/accel_missing/2317 b/gitlab/issues_text/target_sh4/host_missing/accel_missing/2317 new file mode 100644 index 000000000..920b01b62 --- /dev/null +++ b/gitlab/issues_text/target_sh4/host_missing/accel_missing/2317 @@ -0,0 +1,38 @@ +SH4: ADDV instruction not emulated properly +Description of problem: +ADDV opcode is emulated incorrectly. + +The documentation says: + +`ADDV Rm, Rn Rn + Rm -> Rn, overflow -> T` + +What Qemu actually emulates: + +`ADDV Rm, Rn Rn + Rm -> Rm, overflow -> T` +Steps to reproduce: +```c +#include <stdio.h> + +int main(void) +{ + register unsigned int a asm("r8") = 0x7fffffff; + register unsigned int b asm("r9") = 1; + register unsigned int c asm("r10"); + + asm volatile("clrt\n" + "addv %2,%0\n" + "movt %1\n" + : "+r"(a), "=r"(c) : "r"(b) :); + + printf("Values: a=0x%x b=0x%x c=0x%x\n", a, b, c); + + return 0; +} + +``` +Additional information: +Tested on real hardware (SEGA Dreamcast, GCC 15.0), the program above prints: +`Values: a=0x80000000 b=0x1 c=0x1` + +Running with Qemu (and GCC 13.0), the same program prints: +`Values: a=0x7fffffff b=0x80000000 c=0x1` diff --git a/gitlab/issues_text/target_sh4/host_missing/accel_missing/2318 b/gitlab/issues_text/target_sh4/host_missing/accel_missing/2318 new file mode 100644 index 000000000..28438fb54 --- /dev/null +++ b/gitlab/issues_text/target_sh4/host_missing/accel_missing/2318 @@ -0,0 +1,34 @@ +SH4: SUBV instruction not emulated properly +Description of problem: +SUBV opcode is emulated incorrectly. + +The documentation says: + +`SUBV Rm, Rn Rn - Rm -> Rn, underflow -> T` + +Qemu seems to perform the subtraction correctly, but will not detect an underflow. +Steps to reproduce: +```c +#include <stdio.h> + +int main(void) +{ + register unsigned int a asm("r8") = 0x80000001; + register unsigned int b asm("r9") = 0x2; + register unsigned int c asm("r10"); + + asm volatile("subv %2,%0\n" + "movt %1\n" + : "+r"(a), "=r"(c) : "r"(b) :); + + printf("Values: a=0x%x b=0x%x c=0x%x\n", a, b, c); + + return 0; +} +``` +Additional information: +Tested on real hardware (SEGA Dreamcast, GCC 15.0), the program above prints: +`Values: a=0x7fffffff b=0x2 c=0x1` + +Running with Qemu (and GCC 13.0), the same program prints: +`Values: a=0x7fffffff b=0x2 c=0x0` diff --git a/gitlab/issues_text/target_sh4/host_missing/accel_missing/376 b/gitlab/issues_text/target_sh4/host_missing/accel_missing/376 new file mode 100644 index 000000000..90cd482a0 --- /dev/null +++ b/gitlab/issues_text/target_sh4/host_missing/accel_missing/376 @@ -0,0 +1 @@ +Indentation should be done with spaces, not with TABs, in the SH4 subsystem diff --git a/gitlab/issues_text/target_sh4/host_missing/accel_missing/570 b/gitlab/issues_text/target_sh4/host_missing/accel_missing/570 new file mode 100644 index 000000000..bc9ee8c1d --- /dev/null +++ b/gitlab/issues_text/target_sh4/host_missing/accel_missing/570 @@ -0,0 +1 @@ +linux-user/sh4/termbits.h:276: warning: "TIOCSER_TEMT" redefined diff --git a/gitlab/issues_text/target_sh4/host_missing/accel_missing/856 b/gitlab/issues_text/target_sh4/host_missing/accel_missing/856 new file mode 100644 index 000000000..69ad12d0e --- /dev/null +++ b/gitlab/issues_text/target_sh4/host_missing/accel_missing/856 @@ -0,0 +1,61 @@ +Occasional deadlock in linux-user (sh4) when running threadcount test +Description of problem: + +Steps to reproduce: +1. docker run --rm -it -u (id -u) -v $HOME:$HOME -w (pwd) qemu/debian-all-test-cross /bin/bash +2. '../../configure' '--cc=clang' '--cxx=clang++' '--disable-system' '--target-list-exclude=microblazeel-linux-user,aarch64_be-linux-user,i386-linux-user,m68k-linux-user,mipsn32el-linux-user,xtensaeb-linux-user' '--extra-cflags=-fsanitize=undefined' '--extra-cflags=-fno-sanitize-recover=undefined' +3. make; make build-tcg +4. retry.py -n 400 -c -- timeout --foreground 90 ./qemu-sh4 -plugin ./tests/plugin/libinsn.so -d plugin ./tests/tcg/sh4-linux-user/threadcount + +Failure rate on hackbox: + +``` +Results summary: +0: 397 times (99.25%), avg time 0.686 (0.00 varience/0.01 deviation) +124: 3 times (0.75%), avg time 90.559 (0.00 varience/0.01 deviation) +``` + +It seems to fail more frequently on Gitlabs CI +Additional information: +Without the timeout you end up with a deadlock. The following backtrace was found, stepping in gdb unwedges the hang: + +``` +(gdb) info threads + Id Target Id Frame +* 1 LWP 15894 "qemu-sh4" safe_syscall_base () at ../../common-user/host/x86_64/safe-syscall.inc.S:75 + 2 LWP 15994 "qemu-sh4" 0x00007f956b800f59 in syscall () from target:/lib/x86_64-linux-gnu/libc.so.6 + 3 LWP 15997 "qemu-sh4" safe_syscall_base () at ../../common-user/host/x86_64/safe-syscall.inc.S:75 +(gdb) bt +#0 safe_syscall_base () at ../../common-user/host/x86_64/safe-syscall.inc.S:75 +#1 0x0000560ee17196e4 in safe_futex (uaddr=0x58e8, op=-513652411, val=<optimized out>, timeout=0xf0, uaddr2=<optimized out>, val3=582) at ../../linux-user/syscall.c:681 +#2 do_safe_futex (uaddr=0x58e8, op=-513652411, val=<optimized out>, timeout=0xf0, uaddr2=<optimized out>, val3=582) at ../../linux-user/syscall.c:7757 +#3 0x0000560ee170c8d9 in do_syscall1 (cpu_env=<optimized out>, num=<optimized out>, arg1=<optimized out>, arg2=<optimized out>, arg3=22760, arg4=<optimized out>, arg5=<optimized out>, arg6=240, arg7=0, arg8=0) at /home/alex.bennee/lsrc/qemu.git/include/exec/cpu_ldst.h:90 +#4 0x0000560ee170220c in do_syscall (cpu_env=<optimized out>, num=<optimized out>, arg1=<optimized out>, arg2=<optimized out>, arg3=<optimized out>, arg4=<optimized out>, arg5=<optimized out>, arg6=<optimized out>, arg7=<optimized out>, arg8=<optimized out>) at ../../linux-user/syscall.c:13239 +#5 0x0000560ee1626111 in cpu_loop (env=0x560ee294b028) at ../../linux-user/sh4/cpu_loop.c:43 +#6 0x0000560ee16ee37d in main (argc=-493657104, argv=0x7ffdcaf52028, envp=<optimized out>) at ../../linux-user/main.c:883 +(gdb) thread 2 +[Switching to thread 2 (LWP 15994)] +#0 0x00007f956b800f59 in syscall () from target:/lib/x86_64-linux-gnu/libc.so.6 +(gdb) bt +#0 0x00007f956b800f59 in syscall () from target:/lib/x86_64-linux-gnu/libc.so.6 +#1 0x0000560ee1847bd6 in qemu_futex_wait (f=<optimized out>, val=<optimized out>) at /home/alex.bennee/lsrc/qemu.git/include/qemu/futex.h:29 +#2 qemu_event_wait (ev=0x560ee2738974 <rcu_call_ready_event>) at ../../util/qemu-thread-posix.c:481 +#3 0x0000560ee18539a2 in call_rcu_thread (opaque=<optimized out>) at ../../util/rcu.c:261 +#4 0x0000560ee1847f17 in qemu_thread_start (args=0x560ee2933eb0) at ../../util/qemu-thread-posix.c:556 +#5 0x00007f956b8f6fa3 in start_thread () from target:/lib/x86_64-linux-gnu/libpthread.so.0 +#6 0x00007f956b8064cf in clone () from target:/lib/x86_64-linux-gnu/libc.so.6 +(gdb) thread 3 +[Switching to thread 3 (LWP 15997)] +#0 safe_syscall_base () at ../../common-user/host/x86_64/safe-syscall.inc.S:75 +75 cmp $-4095, %rax +(gdb) bt +#0 safe_syscall_base () at ../../common-user/host/x86_64/safe-syscall.inc.S:75 +#1 0x0000560ee17196e4 in safe_futex (uaddr=0x2, op=-513652411, val=<optimized out>, timeout=0x3f7fcdc4, uaddr2=<optimized out>, val3=582) at ../../linux-user/syscall.c:681 +#2 do_safe_futex (uaddr=0x2, op=-513652411, val=<optimized out>, timeout=0x3f7fcdc4, uaddr2=<optimized out>, val3=582) at ../../linux-user/syscall.c:7757 +#3 0x0000560ee170c8d9 in do_syscall1 (cpu_env=<optimized out>, num=<optimized out>, arg1=<optimized out>, arg2=<optimized out>, arg3=2, arg4=<optimized out>, arg5=<optimized out>, arg6=1065340356, arg7=0, arg8=0) at /home/alex.bennee/lsrc/qemu.git/include/exec/cpu_ldst.h:90 +#4 0x0000560ee170220c in do_syscall (cpu_env=<optimized out>, num=<optimized out>, arg1=<optimized out>, arg2=<optimized out>, arg3=<optimized out>, arg4=<optimized out>, arg5=<optimized out>, arg6=<optimized out>, arg7=<optimized out>, arg8=<optimized out>) at ../../linux-user/syscall.c:13239 +#5 0x0000560ee1626111 in cpu_loop (env=0x560ee2a2c2d8) at ../../linux-user/sh4/cpu_loop.c:43 +#6 0x0000560ee171728f in clone_func (arg=<optimized out>) at ../../linux-user/syscall.c:6608 +#7 0x00007f956b8f6fa3 in start_thread () from target:/lib/x86_64-linux-gnu/libpthread.so.0 +#8 0x00007f956b8064cf in clone () from target:/lib/x86_64-linux-gnu/libc.so.6 +``` |