From: Bodo Stroesser <[EMAIL PROTECTED]> cleanup and fix the check for advanced sysemu (PTRACE_SYSEMU_SINGLESTEP option)
Signed-off-by: Bodo Stroesser <[EMAIL PROTECTED]> Signed-off-by: Jeff Dike <[EMAIL PROTECTED]> Index: test/arch/um/os-Linux/start_up.c =================================================================== --- test.orig/arch/um/os-Linux/start_up.c 2005-09-01 17:19:47.000000000 -0400 +++ test/arch/um/os-Linux/start_up.c 2005-09-01 17:21:35.000000000 -0400 @@ -161,7 +161,7 @@ static void __init check_sysemu(void) { void *stack; - int pid, syscall, n, status, count=0; + int pid, n, status, count=0; printk("Checking syscall emulation patch for ptrace..."); sysemu_supported = 0; @@ -192,6 +192,12 @@ printk("Checking advanced syscall emulation patch for ptrace..."); pid = start_ptraced_child(&stack); + + if(ptrace(PTRACE_OLDSETOPTIONS, pid, 0, + (void *) PTRACE_O_TRACESYSGOOD) < 0) + panic("check_ptrace: PTRACE_OLDSETOPTIONS failed, errno = %d", + errno); + while(1){ count++; if(ptrace(PTRACE_SYSEMU_SINGLESTEP, pid, 0, 0) < 0) @@ -199,15 +205,10 @@ CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); if(n < 0) panic("check_ptrace : wait failed, errno = %d", errno); - if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGTRAP)) - panic("check_ptrace : expected (SIGTRAP|SYSCALL_TRAP), " - "got status = %d", status); - - syscall = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET, - 0); - if(syscall == __NR_getpid){ + if(WIFSTOPPED(status) && (WSTOPSIG(status) == (SIGTRAP|0x80))){ if (!count) - panic("check_ptrace : SYSEMU_SINGLESTEP doesn't singlestep"); + panic("check_ptrace : SYSEMU_SINGLESTEP " + "doesn't singlestep"); n = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET, os_getpid()); if(n < 0) @@ -215,6 +216,11 @@ "call return, errno = %d", errno); break; } + else if(WIFSTOPPED(status) && (WSTOPSIG(status) == SIGTRAP)) + count++; + else + panic("check_ptrace : expected SIGTRAP or " + "(SIGTRAP|0x80), got status = %d", status); } if (stop_ptraced_child(pid, stack, 0, 0) < 0) goto fail_stopped; @@ -250,8 +256,8 @@ CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); if(n < 0) panic("check_ptrace : wait failed, errno = %d", errno); - if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGTRAP + 0x80)) - panic("check_ptrace : expected SIGTRAP + 0x80, " + if(!WIFSTOPPED(status) || (WSTOPSIG(status) != (SIGTRAP|0x80))) + panic("check_ptrace : expected (SIGTRAP|0x80), " "got status = %d", status); syscall = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET, - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/