Messages in this thread Patch in this message | | | Subject | [PATCH 8/16] UML - Code cleanup | Date | Mon, 07 Mar 2005 15:38:06 -0500 | From | Jeff Dike <> |
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From: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Shifting register restore and userspace resume to the beginning of the userspace loop, we can remove the identical code done before the loop.
Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com> Signed-off-by: Jeff Dike <jdike@addtoit.com>
Index: uml-i386/arch/um/kernel/skas/process.c =================================================================== --- uml-i386.orig/arch/um/kernel/skas/process.c 2005-03-02 23:39:26.408483443 -0800 +++ uml-i386/arch/um/kernel/skas/process.c 2005-03-02 23:45:55.666136061 -0800 @@ -139,17 +139,20 @@ int err, status, op, pid = userspace_pid[0]; int local_using_sysemu; /*To prevent races if using_sysemu changes under us.*/ - restore_registers(pid, regs); - - local_using_sysemu = get_using_sysemu(); + while(1){ + restore_registers(pid, regs); - op = local_using_sysemu ? PTRACE_SYSEMU : PTRACE_SYSCALL; - err = ptrace(op, pid, 0, 0); + /* Now we set local_using_sysemu to be used for one loop */ + local_using_sysemu = get_using_sysemu(); + + op = SELECT_PTRACE_OPERATION(local_using_sysemu, singlestepping(NULL)); + + err = ptrace(op, pid, 0, 0); + if(err) + panic("userspace - could not resume userspace process, " + "pid=%d, ptrace operation = %d, errno = %d\n", + op, errno); - if(err) - panic("userspace - PTRACE_%s failed, errno = %d\n", - local_using_sysemu ? "SYSEMU" : "SYSCALL", errno); - while(1){ CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED)); if(err < 0) panic("userspace - waitpid failed, errno = %d\n", @@ -187,19 +190,6 @@ /* Avoid -ERESTARTSYS handling in host */ PT_SYSCALL_NR(regs->skas.regs) = -1; } - - restore_registers(pid, regs); - - /*Now we ended the syscall, so re-read local_using_sysemu.*/ - local_using_sysemu = get_using_sysemu(); - - op = SELECT_PTRACE_OPERATION(local_using_sysemu, singlestepping(NULL)); - - err = ptrace(op, pid, 0, 0); - if(err) - panic("userspace - PTRACE_%s failed, " - "errno = %d\n", - local_using_sysemu ? "SYSEMU" : "SYSCALL", errno); } } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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