Messages in this thread | | | Date | Fri, 19 Apr 1996 12:07:41 -0400 | From | "Steven N. Hirsch" <> | Subject | dosemu & newer kernels |
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As of 1.3.89 (or so) my old, trusty, non-emumodule dosemu-0.60.4 stopped working :-(. Strace suggests that this is the culprit:
-- mmap(0, 1048576, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|0x20, 4294967295, 0) = 0 brk(0x813d000) = 0x813d000 shmget(IPC_PRIVATE, 65520, 0x1ed|0644) = 6 shmget(IPC_PRIVATE, 65520, 0x1ed|0644) = 7 shmat(7, 0x1, SHM_REMAP|SHM_RND) = 0 shmat(7, 0x100000, SHM_REMAP) = 0x100000 shmat(6, 0x812a228, SHM_REMAP) = -1 EINVAL (Invalid argument) ^^^^^^^^^^^^^^^^---- Here be dragons.. rmdir("/tmp/dosem00117aaa") = 0 setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0 sigaction(SIGALRM, {0x804bd20, [ALRM], SA_RESTART}, NULL) = 0 sigaction(SIGSEGV, {0x804bd20, [ALRM], SA_RESTART}, NULL) = 0 sigaction(SIGILL, {0x804bd20, [ALRM], SA_RESTART}, NULL) = 0 sigaction(SIGFPE, {0x804bd20, [ALRM], SA_RESTART}, NULL) = 0 sigaction(SIGTRAP, {0x804bd20, [ALRM], SA_RESTART}, NULL) = 0 close(0) = 0 close(0) = -1 EBADF (Bad file number) close(0) = -1 EBADF (Bad file number) unlink("") = -1 ENOENT (No such file or directory) _exit(45) = ?
Question is, why does shmat fail? I'm far from an expert on the Linux mm system, but perhaps a problem now exists. Again, perhaps dosemu's behavior was taking advantage of something that had actually been broken until recently :-)..
Any takers? Which is it?
- Steve
_________________________________________________________ |Steven N. Hirsch "Anything worth doing is worth | |University of Vermont overdoing.." - Hunter S. Thompson | |Computer Science / EE | ------------------------------------------------------------
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