clean up repository

1 files changed, 0 insertions, 62 deletions

diff --git a/gitlab/issues_text/target_missing/host_missing/accel_TCG/1454 b/gitlab/issues_text/target_missing/host_missing/accel_TCG/1454
deleted file mode 100644
index f15dfebf6..000000000
--- a/gitlab/issues_text/target_missing/host_missing/accel_TCG/1454
+++ /dev/null
@@ -1,62 +0,0 @@
-QEMU TCG s390x fails an assertion while dispatching an FIXPT_DIVIDE exception on DR when compiled with LTO
-Description of problem:
-When running the attached minimal reproducer, with qemu-system-s390x version 7.2.0 compiled with LTO (`--enable-lto`) with GCC v12.2.1, QEMU fails an assertion and crashes:
-```
-qemu-system-s390x: ../target/s390x/tcg/excp_helper.c:215: do_program_interrupt: Assertion `ilen == 2 || ilen == 4 || ilen == 6' failed.
-Aborted (core dumped)
-```
-Steps to reproduce:
-1. Compile QEMU v7.2.0 for s390x with LTO enabled:
-   ```
-   ../configure --target-list=s390x-softmmu --enable-lto
-   ```
-2. Compile the given reproducer assembler [lpswe-to-pgm.S](/uploads/200fb0e777ddd0ed26f51009e81c26ea/lpswe-to-pgm.S):
-   ```
-   s390x-linux-gnu-gcc -march=z13 -m64 -nostdlib -nostartfiles -static -Wl,-Ttext=0 -Wl,--build-id=none lpswe-to-pgm.S -o lpswe-to-pgm
-   ```
-3. Execute QEMU on the reproducer:
-   ```
-   ./qemu-system-s390x -kernel lpswe-to-pgm
-   ```
-Additional information:
-I have debugged QEMU to try to find the root cause, and I believe I found it, but I'm not sure what the most appropriate way to fix it would be:
-
-QEMU executes the `DR` instruction by executing the `divs32` helper.
-
-When the helper sees that the final division result does not fit in 32 bits, it generates a program interrupt for fixed point divide by calling the `tcg_s390_program_interrupt` function, with the final parameter being the TCG host PC, which is found by calling `GETPC`.
-
-`tcg_s390_program_interrupt` then calls `cpu_restore_state`, and then as long as the host PC is valid, `cpu_restore_state` eventually calls `s390x_restore_state_to_opc` through a long chain of calls, which sets `CPUS390XState::int_pgm_ilen` to a valid value.
-
-Unfortunately when compiling with LTO, the host PC is not valid, which means we don't update `int_pgm_ilen`, resulting in the failed assertion.
-
-The reason the host PC is not valid when compiling with LTO, is that GCC decides to split `helper_divs32` into 2 parts, the actual div logic being the first part, and the call to `GETPC` & `tcg_s390_program_interrupt` being the second part. The way GCC implements it is by turning the second part into a separate function, which the first part calls - see disassembly below. (GCC then re-uses the second part in other similar TCG helpers)
-
-Because we now called the second part before calling `GETPC`, we have a new return address, and `GETPC` returns the address of the first part, instead of the TCG host PC.
-
-```
-000000000022c870 <helper_divs32>:
-  22c870:       48 83 ec 08             sub    rsp,0x8
-  22c874:       85 d2                   test   edx,edx
-  22c876:       74 22                   je     22c89a <helper_divs32+0x2a>
-  22c878:       48 89 f0                mov    rax,rsi
-  22c87b:       48 63 ca                movsxd rcx,edx
-  22c87e:       48 99                   cqo    
-  22c880:       48 f7 f9                idiv   rcx
-  22c883:       4c 63 c0                movsxd r8,eax
-  22c886:       48 89 97 10 03 00 00    mov    QWORD PTR [rdi+0x310],rdx
-  22c88d:       49 39 c0                cmp    r8,rax
-  22c890:       75 17                   jne    22c8a9 <helper_divs32+0x39>
-  22c892:       4c 89 c0                mov    rax,r8
-  22c895:       48 83 c4 08             add    rsp,0x8
-  22c899:       c3                      ret    
-  22c89a:       48 8b 54 24 08          mov    rdx,QWORD PTR [rsp+0x8]
-  22c89f:       be 09 00 00 00          mov    esi,0x9
-  22c8a4:       e8 47 e5 ff ff          call   22adf0 <tcg_s390_program_interrupt>
-  22c8a9:       e8 b2 fe ff ff          call   22c760 <helper_divs32.part.0>
-
-000000000022c760 <helper_divs32.part.0>:
-  22c760:       48 83 ec 08             sub    rsp,0x8
-  22c764:       be 09 00 00 00          mov    esi,0x9
-  22c769:       48 8b 54 24 08          mov    rdx,QWORD PTR [rsp+0x8]
-  22c76e:       e8 7d e6 ff ff          call   22adf0 <tcg_s390_program_interrupt>
-```