1 files changed, 83 insertions, 0 deletions
diff --git a/results/classifier/118/PID/1760 b/results/classifier/118/PID/1760
new file mode 100644
index 000000000..4e4b3050a
--- /dev/null
+++ b/results/classifier/118/PID/1760
@@ -0,0 +1,83 @@
+i386: 0.991
+PID: 0.966
+kernel: 0.957
+architecture: 0.944
+performance: 0.934
+graphic: 0.920
+device: 0.909
+files: 0.860
+debug: 0.831
+ppc: 0.775
+peripherals: 0.771
+network: 0.727
+permissions: 0.714
+user-level: 0.659
+assembly: 0.651
+arm: 0.622
+VMM: 0.616
+vnc: 0.615
+socket: 0.609
+TCG: 0.596
+boot: 0.551
+KVM: 0.516
+semantic: 0.502
+hypervisor: 0.476
+register: 0.449
+risc-v: 0.445
+mistranslation: 0.426
+x86: 0.321
+virtual: 0.169
+
+qemu8-i386 gets wrong arguments for 32-bit old mmap syscall (_NR_mmap = 90)
+Description of problem:
+qemu8-i386 does not decode syscall arguments correctly for system call _NR_mmap = 90 on i386.
+```
+$ strace ./oldmmap
+execve("./oldmmap", ["./oldmmap"], 0x7fff46ba6d40 /* 61 vars */) = 0
+[ Process PID=405233 runs in 32 bit mode. ]
+mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xf7fa7000
+exit(5)                                 = ?
++++ exited with 5 +++
+
+$ build/qemu-i386 -strace ./oldmmap
+405254 mmap(0x40800058,0,PROT_NONE,0,0,0) = 0x3fffb000
+405254 exit(5)
+```
+Steps to reproduce:
+1. gcc -m32 -o oldmmap -nostartfiles -nostdlib oldmmap.S  # build 32-bit executable
+2. strace ./oldmmap  # run under strace
+3. build/qemu-i386 -strace ./oldmmap  # run under "qemu-i386 -strace"
+4. Notice that qemu-i386 did not report the same arguments to the _NR_map syscall as /usr/bin/strace did.
+Additional information:
+```
+$ cat oldmmap.S
+MAP_FIXED=     0x10
+MAP_PRIVATE=   0x02
+MAP_ANONYMOUS= 0x20
+
+PROT_READ=      1
+PROT_WRITE=     2
+PROT_EXEC=      4
+
+_NR_exit = 1
+_NR_mmap = 90  // oldmmap: %ebx -> array of 6 arguments
+
+    .globl _start
+_start:
+    push $0  // offset
+    push $-1  // fd
+    push $MAP_PRIVATE|MAP_ANONYMOUS  // flags
+    push $PROT_READ|PROT_WRITE  // protection
+    push $2<<12  // length
+    push $0  // addr (kernel chooses)
+    mov %esp,%ebx
+    mov $_NR_mmap,%eax
+    int $0x80
+    nop
+
+    mov $5,%ebx
+    mov $_NR_exit,%eax
+    int $0x80
+    hlt
+$ 
+```