From 8e2c85aa6c7a158d967db75931db7f13d20d31f4 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 6 Sep 2012 13:39:47 -0400 Subject: um: let signal_delivered() do SIGTRAP on singlestepping into handler ... rather than duplicating that in sigframe setup code (and doing that inconsistently, at that) Signed-off-by: Al Viro --- arch/x86/um/signal.c | 6 ------ 1 file changed, 6 deletions(-) (limited to 'arch/x86/um') diff --git a/arch/x86/um/signal.c b/arch/x86/um/signal.c index a508cea1..ba7363e 100644 --- a/arch/x86/um/signal.c +++ b/arch/x86/um/signal.c @@ -416,9 +416,6 @@ int setup_signal_stack_sc(unsigned long stack_top, int sig, PT_REGS_AX(regs) = (unsigned long) sig; PT_REGS_DX(regs) = (unsigned long) 0; PT_REGS_CX(regs) = (unsigned long) 0; - - if ((current->ptrace & PT_DTRACE) && (current->ptrace & PT_PTRACED)) - ptrace_notify(SIGTRAP); return 0; } @@ -466,9 +463,6 @@ int setup_signal_stack_si(unsigned long stack_top, int sig, PT_REGS_AX(regs) = (unsigned long) sig; PT_REGS_DX(regs) = (unsigned long) &frame->info; PT_REGS_CX(regs) = (unsigned long) &frame->uc; - - if ((current->ptrace & PT_DTRACE) && (current->ptrace & PT_PTRACED)) - ptrace_notify(SIGTRAP); return 0; } -- cgit v1.1 From a4d94ff8aa864c05b33c2de1f8c5d0176d7a4b63 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 20 Sep 2012 09:28:25 -0400 Subject: um: kill thread->forking we only use that to tell copy_thread() done by syscall from that done by kernel_thread(). However, it's easier to do simply by checking PF_KTHREAD in thread flags. Merge sys_clone() guts for 32bit and 64bit, while we are at it... Signed-off-by: Al Viro --- arch/x86/um/shared/sysdep/syscalls.h | 2 ++ arch/x86/um/sys_call_table_32.c | 2 +- arch/x86/um/syscalls_32.c | 27 +++++++-------------------- arch/x86/um/syscalls_64.c | 23 +++-------------------- 4 files changed, 13 insertions(+), 41 deletions(-) (limited to 'arch/x86/um') diff --git a/arch/x86/um/shared/sysdep/syscalls.h b/arch/x86/um/shared/sysdep/syscalls.h index bd9a89b..ca255a8 100644 --- a/arch/x86/um/shared/sysdep/syscalls.h +++ b/arch/x86/um/shared/sysdep/syscalls.h @@ -1,3 +1,5 @@ +extern long sys_clone(unsigned long clone_flags, unsigned long newsp, + void __user *parent_tid, void __user *child_tid); #ifdef __i386__ #include "syscalls_32.h" #else diff --git a/arch/x86/um/sys_call_table_32.c b/arch/x86/um/sys_call_table_32.c index 68d1dc9..b5408ce 100644 --- a/arch/x86/um/sys_call_table_32.c +++ b/arch/x86/um/sys_call_table_32.c @@ -28,7 +28,7 @@ #define ptregs_execve sys_execve #define ptregs_iopl sys_iopl #define ptregs_vm86old sys_vm86old -#define ptregs_clone sys_clone +#define ptregs_clone i386_clone #define ptregs_vm86 sys_vm86 #define ptregs_sigaltstack sys_sigaltstack #define ptregs_vfork sys_vfork diff --git a/arch/x86/um/syscalls_32.c b/arch/x86/um/syscalls_32.c index b853e86..db444c7 100644 --- a/arch/x86/um/syscalls_32.c +++ b/arch/x86/um/syscalls_32.c @@ -3,37 +3,24 @@ * Licensed under the GPL */ -#include "linux/sched.h" -#include "linux/shm.h" -#include "linux/ipc.h" -#include "linux/syscalls.h" -#include "asm/mman.h" -#include "asm/uaccess.h" -#include "asm/unistd.h" +#include +#include /* * The prototype on i386 is: * - * int clone(int flags, void * child_stack, int * parent_tidptr, struct user_desc * newtls, int * child_tidptr) + * int clone(int flags, void * child_stack, int * parent_tidptr, struct user_desc * newtls * * and the "newtls" arg. on i386 is read by copy_thread directly from the * register saved on the stack. */ -long sys_clone(unsigned long clone_flags, unsigned long newsp, - int __user *parent_tid, void *newtls, int __user *child_tid) +long i386_clone(unsigned long clone_flags, unsigned long newsp, + int __user *parent_tid, void *newtls, int __user *child_tid) { - long ret; - - if (!newsp) - newsp = UPT_SP(¤t->thread.regs.regs); - - current->thread.forking = 1; - ret = do_fork(clone_flags, newsp, ¤t->thread.regs, 0, parent_tid, - child_tid); - current->thread.forking = 0; - return ret; + return sys_clone(clone_flags, newsp, parent_tid, child_tid); } + long sys_sigaction(int sig, const struct old_sigaction __user *act, struct old_sigaction __user *oact) { diff --git a/arch/x86/um/syscalls_64.c b/arch/x86/um/syscalls_64.c index f3d82bb..adb08eb 100644 --- a/arch/x86/um/syscalls_64.c +++ b/arch/x86/um/syscalls_64.c @@ -5,12 +5,9 @@ * Licensed under the GPL */ -#include "linux/linkage.h" -#include "linux/personality.h" -#include "linux/utsname.h" -#include "asm/prctl.h" /* XXX This should get the constants from libc */ -#include "asm/uaccess.h" -#include "os.h" +#include +#include /* XXX This should get the constants from libc */ +#include long arch_prctl(struct task_struct *task, int code, unsigned long __user *addr) { @@ -79,20 +76,6 @@ long sys_arch_prctl(int code, unsigned long addr) return arch_prctl(current, code, (unsigned long __user *) addr); } -long sys_clone(unsigned long clone_flags, unsigned long newsp, - void __user *parent_tid, void __user *child_tid) -{ - long ret; - - if (!newsp) - newsp = UPT_SP(¤t->thread.regs.regs); - current->thread.forking = 1; - ret = do_fork(clone_flags, newsp, ¤t->thread.regs, 0, parent_tid, - child_tid); - current->thread.forking = 0; - return ret; -} - void arch_switch_to(struct task_struct *to) { if ((to->thread.arch.fs == 0) || (to->mm == NULL)) -- cgit v1.1 From 6783eaa2e1253fbcbe2c2f6bb4c843abf1343caf Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 2 Aug 2012 23:05:11 +0400 Subject: x86, um/x86: switch to generic sys_execve and kernel_execve 32bit wrapper is lost on that; 64bit one is *not*, since we need to arrange for full pt_regs on stack when we call sys_execve() and we need to load callee-saved ones from there afterwards. Signed-off-by: Al Viro --- arch/x86/um/sys_call_table_32.c | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/x86/um') diff --git a/arch/x86/um/sys_call_table_32.c b/arch/x86/um/sys_call_table_32.c index b5408ce..232e605 100644 --- a/arch/x86/um/sys_call_table_32.c +++ b/arch/x86/um/sys_call_table_32.c @@ -25,7 +25,6 @@ #define old_mmap sys_old_mmap #define ptregs_fork sys_fork -#define ptregs_execve sys_execve #define ptregs_iopl sys_iopl #define ptregs_vm86old sys_vm86old #define ptregs_clone i386_clone -- cgit v1.1 From 1f02ab4a237086095bd584f3446da307ac2d02e6 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 21 Sep 2012 20:32:29 -0400 Subject: um: switch to generic kernel_thread() Signed-off-by: Al Viro --- arch/x86/um/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/x86/um') diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig index 9926e11..da85b6f 100644 --- a/arch/x86/um/Kconfig +++ b/arch/x86/um/Kconfig @@ -13,6 +13,7 @@ endmenu config UML_X86 def_bool y select GENERIC_FIND_FIRST_BIT + select GENERIC_KERNEL_THREAD config 64BIT bool "64-bit kernel" if SUBARCH = "x86" -- cgit v1.1