Merge branch 'siginfo-si_trapno-for-v5.15' of git://git.kernel.org/pub/scm/linux...

Pull siginfo si_trapno updates from Eric Biederman:
 "The full set of si_trapno changes was not appropriate as a fix for the
  newly added SIGTRAP TRAP_PERF, and so I postponed the rest of the
  related cleanups.

  This is the rest of the cleanups for si_trapno that reduces it from
  being a really weird arch special case that is expect to be always
  present (but isn't) on the architectures that support it to being yet
  another field in the _sigfault union of struct siginfo.

  The changes have been reviewed and marinated in linux-next. With the
  removal of this awkward special case new code (like SIGTRAP TRAP_PERF)
  that works across architectures should be easier to write and
  maintain"

* 'siginfo-si_trapno-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  signal: Rename SIL_PERF_EVENT SIL_FAULT_PERF_EVENT for consistency
  signal: Verify the alignment and size of siginfo_t
  signal: Remove the generic __ARCH_SI_TRAPNO support
  signal/alpha: si_trapno is only used with SIGFPE and SIGTRAP TRAP_UNK
  signal/sparc: si_trapno is only used with SIGILL ILL_ILLTRP
  arm64: Add compile-time asserts for siginfo_t offsets
  arm: Add compile-time asserts for siginfo_t offsets
  sparc64: Add compile-time asserts for siginfo_t offsets

diff --git a/arch/alpha/include/uapi/asm/siginfo.h b/arch/alpha/include/uapi/asm/siginfo.h
index 6e1a2af..e08eae8 100644 (file)
--- a/arch/alpha/include/uapi/asm/siginfo.h
+++ b/arch/alpha/include/uapi/asm/siginfo.h
@@ -2,8 +2,6 @@
 #ifndef _ALPHA_SIGINFO_H
 #define _ALPHA_SIGINFO_H
 
-#define __ARCH_SI_TRAPNO
-
 #include <asm-generic/siginfo.h>
 
 #endif

diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index d31167e..8bbeebb 100644 (file)
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -876,7 +876,7 @@ SYSCALL_DEFINE5(osf_setsysinfo, unsigned long, op, void __user *, buffer,
                        if (fex & IEEE_TRAP_ENABLE_DZE) si_code = FPE_FLTDIV;
                        if (fex & IEEE_TRAP_ENABLE_INV) si_code = FPE_FLTINV;
 
-                       send_sig_fault(SIGFPE, si_code,
+                       send_sig_fault_trapno(SIGFPE, si_code,
                                       (void __user *)NULL,  /* FIXME */
                                       0, current);
                }

diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index 948b897..bc077ba 100644 (file)
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -219,7 +219,7 @@ do_sigreturn(struct sigcontext __user *sc)
 
        /* Send SIGTRAP if we're single-stepping: */
        if (ptrace_cancel_bpt (current)) {
-               send_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *) regs->pc, 0,
+               send_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *) regs->pc,
                               current);
        }
        return;
@@ -247,7 +247,7 @@ do_rt_sigreturn(struct rt_sigframe __user *frame)
 
        /* Send SIGTRAP if we're single-stepping: */
        if (ptrace_cancel_bpt (current)) {
-               send_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *) regs->pc, 0,
+               send_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *) regs->pc,
                               current);
        }
        return;

diff --git a/arch/alpha/kernel/traps.c b/arch/alpha/kernel/traps.c
index 5398f98..e805106 100644 (file)
--- a/arch/alpha/kernel/traps.c
+++ b/arch/alpha/kernel/traps.c
@@ -227,7 +227,7 @@ do_entArith(unsigned long summary, unsigned long write_mask,
        }
        die_if_kernel("Arithmetic fault", regs, 0, NULL);
 
-       send_sig_fault(SIGFPE, si_code, (void __user *) regs->pc, 0, current);
+       send_sig_fault_trapno(SIGFPE, si_code, (void __user *) regs->pc, 0, current);
 }
 
 asmlinkage void
@@ -268,13 +268,13 @@ do_entIF(unsigned long type, struct pt_regs *regs)
                        regs->pc -= 4;  /* make pc point to former bpt */
                }
 
-               send_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc, 0,
+               send_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc,
                               current);
                return;
 
              case 1: /* bugcheck */
-               send_sig_fault(SIGTRAP, TRAP_UNK, (void __user *) regs->pc, 0,
-                              current);
+               send_sig_fault_trapno(SIGTRAP, TRAP_UNK,
+                                     (void __user *) regs->pc, 0, current);
                return;
                
              case 2: /* gentrap */
@@ -335,8 +335,8 @@ do_entIF(unsigned long type, struct pt_regs *regs)
                        break;
                }
 
-               send_sig_fault(signo, code, (void __user *) regs->pc, regs->r16,
-                              current);
+               send_sig_fault_trapno(signo, code, (void __user *) regs->pc,
+                                     regs->r16, current);
                return;
 
              case 4: /* opDEC */
@@ -360,9 +360,9 @@ do_entIF(unsigned long type, struct pt_regs *regs)
                        if (si_code == 0)
                                return;
                        if (si_code > 0) {
-                               send_sig_fault(SIGFPE, si_code,
-                                              (void __user *) regs->pc, 0,
-                                              current);
+                               send_sig_fault_trapno(SIGFPE, si_code,
+                                                     (void __user *) regs->pc,
+                                                     0, current);
                                return;
                        }
                }
@@ -387,7 +387,7 @@ do_entIF(unsigned long type, struct pt_regs *regs)
                      ;
        }
 
-       send_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)regs->pc, 0, current);
+       send_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)regs->pc, current);
 }
 
 /* There is an ifdef in the PALcode in MILO that enables a 
@@ -402,7 +402,7 @@ do_entDbg(struct pt_regs *regs)
 {
        die_if_kernel("Instruction fault", regs, 0, NULL);
 
-       force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)regs->pc, 0);
+       force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)regs->pc);
 }
 
 
@@ -964,12 +964,12 @@ give_sigsegv:
                        si_code = SEGV_MAPERR;
                mmap_read_unlock(mm);
        }
-       send_sig_fault(SIGSEGV, si_code, va, 0, current);
+       send_sig_fault(SIGSEGV, si_code, va, current);
        return;
 
 give_sigbus:
        regs->pc -= 4;
-       send_sig_fault(SIGBUS, BUS_ADRALN, va, 0, current);
+       send_sig_fault(SIGBUS, BUS_ADRALN, va, current);
        return;
 }
 

diff --git a/arch/alpha/mm/fault.c b/arch/alpha/mm/fault.c
index 09172f0..eee5102 100644 (file)
--- a/arch/alpha/mm/fault.c
+++ b/arch/alpha/mm/fault.c
@@ -219,13 +219,13 @@ retry:
        mmap_read_unlock(mm);
        /* Send a sigbus, regardless of whether we were in kernel
           or user mode.  */
-       force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *) address, 0);
+       force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *) address);
        if (!user_mode(regs))
                goto no_context;
        return;
 
  do_sigsegv:
-       force_sig_fault(SIGSEGV, si_code, (void __user *) address, 0);
+       force_sig_fault(SIGSEGV, si_code, (void __user *) address);
        return;
 
 #ifdef CONFIG_ALPHA_LARGE_VMALLOC

diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index a3a38d0..f3800c0 100644 (file)
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -725,3 +725,42 @@ asmlinkage void do_rseq_syscall(struct pt_regs *regs)
        rseq_syscall(regs);
 }
 #endif
+
+/*
+ * Compile-time assertions for siginfo_t offsets. Check NSIG* as well, as
+ * changes likely come with new fields that should be added below.
+ */
+static_assert(NSIGILL  == 11);
+static_assert(NSIGFPE  == 15);
+static_assert(NSIGSEGV == 9);
+static_assert(NSIGBUS  == 5);
+static_assert(NSIGTRAP == 6);
+static_assert(NSIGCHLD == 6);
+static_assert(NSIGSYS  == 2);
+static_assert(sizeof(siginfo_t) == 128);
+static_assert(__alignof__(siginfo_t) == 4);
+static_assert(offsetof(siginfo_t, si_signo)    == 0x00);
+static_assert(offsetof(siginfo_t, si_errno)    == 0x04);
+static_assert(offsetof(siginfo_t, si_code)     == 0x08);
+static_assert(offsetof(siginfo_t, si_pid)      == 0x0c);
+static_assert(offsetof(siginfo_t, si_uid)      == 0x10);
+static_assert(offsetof(siginfo_t, si_tid)      == 0x0c);
+static_assert(offsetof(siginfo_t, si_overrun)  == 0x10);
+static_assert(offsetof(siginfo_t, si_status)   == 0x14);
+static_assert(offsetof(siginfo_t, si_utime)    == 0x18);
+static_assert(offsetof(siginfo_t, si_stime)    == 0x1c);
+static_assert(offsetof(siginfo_t, si_value)    == 0x14);
+static_assert(offsetof(siginfo_t, si_int)      == 0x14);
+static_assert(offsetof(siginfo_t, si_ptr)      == 0x14);
+static_assert(offsetof(siginfo_t, si_addr)     == 0x0c);
+static_assert(offsetof(siginfo_t, si_addr_lsb) == 0x10);
+static_assert(offsetof(siginfo_t, si_lower)    == 0x14);
+static_assert(offsetof(siginfo_t, si_upper)    == 0x18);
+static_assert(offsetof(siginfo_t, si_pkey)     == 0x14);
+static_assert(offsetof(siginfo_t, si_perf_data)        == 0x10);
+static_assert(offsetof(siginfo_t, si_perf_type)        == 0x14);
+static_assert(offsetof(siginfo_t, si_band)     == 0x0c);
+static_assert(offsetof(siginfo_t, si_fd)       == 0x10);
+static_assert(offsetof(siginfo_t, si_call_addr)        == 0x0c);
+static_assert(offsetof(siginfo_t, si_syscall)  == 0x10);
+static_assert(offsetof(siginfo_t, si_arch)     == 0x14);

diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index 2303633..1a0e2b5 100644 (file)
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -1000,3 +1000,42 @@ void __init minsigstksz_setup(void)
                round_up(sizeof(struct frame_record), 16) +
                16; /* max alignment padding */
 }
+
+/*
+ * Compile-time assertions for siginfo_t offsets. Check NSIG* as well, as
+ * changes likely come with new fields that should be added below.
+ */
+static_assert(NSIGILL  == 11);
+static_assert(NSIGFPE  == 15);
+static_assert(NSIGSEGV == 9);
+static_assert(NSIGBUS  == 5);
+static_assert(NSIGTRAP == 6);
+static_assert(NSIGCHLD == 6);
+static_assert(NSIGSYS  == 2);
+static_assert(sizeof(siginfo_t) == 128);
+static_assert(__alignof__(siginfo_t) == 8);
+static_assert(offsetof(siginfo_t, si_signo)    == 0x00);
+static_assert(offsetof(siginfo_t, si_errno)    == 0x04);
+static_assert(offsetof(siginfo_t, si_code)     == 0x08);
+static_assert(offsetof(siginfo_t, si_pid)      == 0x10);
+static_assert(offsetof(siginfo_t, si_uid)      == 0x14);
+static_assert(offsetof(siginfo_t, si_tid)      == 0x10);
+static_assert(offsetof(siginfo_t, si_overrun)  == 0x14);
+static_assert(offsetof(siginfo_t, si_status)   == 0x18);
+static_assert(offsetof(siginfo_t, si_utime)    == 0x20);
+static_assert(offsetof(siginfo_t, si_stime)    == 0x28);
+static_assert(offsetof(siginfo_t, si_value)    == 0x18);
+static_assert(offsetof(siginfo_t, si_int)      == 0x18);
+static_assert(offsetof(siginfo_t, si_ptr)      == 0x18);
+static_assert(offsetof(siginfo_t, si_addr)     == 0x10);
+static_assert(offsetof(siginfo_t, si_addr_lsb) == 0x18);
+static_assert(offsetof(siginfo_t, si_lower)    == 0x20);
+static_assert(offsetof(siginfo_t, si_upper)    == 0x28);
+static_assert(offsetof(siginfo_t, si_pkey)     == 0x20);
+static_assert(offsetof(siginfo_t, si_perf_data)        == 0x18);
+static_assert(offsetof(siginfo_t, si_perf_type)        == 0x20);
+static_assert(offsetof(siginfo_t, si_band)     == 0x10);
+static_assert(offsetof(siginfo_t, si_fd)       == 0x18);
+static_assert(offsetof(siginfo_t, si_call_addr)        == 0x10);
+static_assert(offsetof(siginfo_t, si_syscall)  == 0x18);
+static_assert(offsetof(siginfo_t, si_arch)     == 0x1c);

diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c
index 2f507f5..d3be01c 100644 (file)
--- a/arch/arm64/kernel/signal32.c
+++ b/arch/arm64/kernel/signal32.c
@@ -457,3 +457,42 @@ void compat_setup_restart_syscall(struct pt_regs *regs)
 {
        regs->regs[7] = __NR_compat_restart_syscall;
 }
+
+/*
+ * Compile-time assertions for siginfo_t offsets. Check NSIG* as well, as
+ * changes likely come with new fields that should be added below.
+ */
+static_assert(NSIGILL  == 11);
+static_assert(NSIGFPE  == 15);
+static_assert(NSIGSEGV == 9);
+static_assert(NSIGBUS  == 5);
+static_assert(NSIGTRAP == 6);
+static_assert(NSIGCHLD == 6);
+static_assert(NSIGSYS  == 2);
+static_assert(sizeof(compat_siginfo_t) == 128);
+static_assert(__alignof__(compat_siginfo_t) == 4);
+static_assert(offsetof(compat_siginfo_t, si_signo)     == 0x00);
+static_assert(offsetof(compat_siginfo_t, si_errno)     == 0x04);
+static_assert(offsetof(compat_siginfo_t, si_code)      == 0x08);
+static_assert(offsetof(compat_siginfo_t, si_pid)       == 0x0c);
+static_assert(offsetof(compat_siginfo_t, si_uid)       == 0x10);
+static_assert(offsetof(compat_siginfo_t, si_tid)       == 0x0c);
+static_assert(offsetof(compat_siginfo_t, si_overrun)   == 0x10);
+static_assert(offsetof(compat_siginfo_t, si_status)    == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_utime)     == 0x18);
+static_assert(offsetof(compat_siginfo_t, si_stime)     == 0x1c);
+static_assert(offsetof(compat_siginfo_t, si_value)     == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_int)       == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_ptr)       == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_addr)      == 0x0c);
+static_assert(offsetof(compat_siginfo_t, si_addr_lsb)  == 0x10);
+static_assert(offsetof(compat_siginfo_t, si_lower)     == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_upper)     == 0x18);
+static_assert(offsetof(compat_siginfo_t, si_pkey)      == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_perf_data) == 0x10);
+static_assert(offsetof(compat_siginfo_t, si_perf_type) == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_band)      == 0x0c);
+static_assert(offsetof(compat_siginfo_t, si_fd)                == 0x10);
+static_assert(offsetof(compat_siginfo_t, si_call_addr) == 0x0c);
+static_assert(offsetof(compat_siginfo_t, si_syscall)   == 0x10);
+static_assert(offsetof(compat_siginfo_t, si_arch)      == 0x14);

diff --git a/arch/mips/include/uapi/asm/siginfo.h b/arch/mips/include/uapi/asm/siginfo.h
index c34c7ee..8cb8bd0 100644 (file)
--- a/arch/mips/include/uapi/asm/siginfo.h
+++ b/arch/mips/include/uapi/asm/siginfo.h
@@ -10,9 +10,7 @@
 #ifndef _UAPI_ASM_SIGINFO_H
 #define _UAPI_ASM_SIGINFO_H
 
-
 #define __ARCH_SIGEV_PREAMBLE_SIZE (sizeof(long) + 2*sizeof(int))
-#undef __ARCH_SI_TRAPNO /* exception code needs to fill this ...  */
 
 #define __ARCH_HAS_SWAPPED_SIGINFO
 

diff --git a/arch/sparc/include/uapi/asm/siginfo.h b/arch/sparc/include/uapi/asm/siginfo.h
index 68bdde4..0e7c275 100644 (file)
--- a/arch/sparc/include/uapi/asm/siginfo.h
+++ b/arch/sparc/include/uapi/asm/siginfo.h
@@ -8,9 +8,6 @@
 
 #endif /* defined(__sparc__) && defined(__arch64__) */
 
-
-#define __ARCH_SI_TRAPNO
-
 #include <asm-generic/siginfo.h>
 
 

diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index d33c58a..547b06b 100644 (file)
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c
@@ -518,7 +518,7 @@ void synchronize_user_stack(void)
 
 static void stack_unaligned(unsigned long sp)
 {
-       force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) sp, 0);
+       force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) sp);
 }
 
 static const char uwfault32[] = KERN_INFO \

diff --git a/arch/sparc/kernel/signal32.c b/arch/sparc/kernel/signal32.c
index e9695a0..4276b9e 100644 (file)
--- a/arch/sparc/kernel/signal32.c
+++ b/arch/sparc/kernel/signal32.c
@@ -745,3 +745,40 @@ asmlinkage int do_sys32_sigstack(u32 u_ssptr, u32 u_ossptr, unsigned long sp)
 out:
        return ret;
 }
+
+/*
+ * Compile-time assertions for siginfo_t offsets. Check NSIG* as well, as
+ * changes likely come with new fields that should be added below.
+ */
+static_assert(NSIGILL  == 11);
+static_assert(NSIGFPE  == 15);
+static_assert(NSIGSEGV == 9);
+static_assert(NSIGBUS  == 5);
+static_assert(NSIGTRAP == 6);
+static_assert(NSIGCHLD == 6);
+static_assert(NSIGSYS  == 2);
+static_assert(sizeof(compat_siginfo_t) == 128);
+static_assert(__alignof__(compat_siginfo_t) == 4);
+static_assert(offsetof(compat_siginfo_t, si_signo)     == 0x00);
+static_assert(offsetof(compat_siginfo_t, si_errno)     == 0x04);
+static_assert(offsetof(compat_siginfo_t, si_code)      == 0x08);
+static_assert(offsetof(compat_siginfo_t, si_pid)       == 0x0c);
+static_assert(offsetof(compat_siginfo_t, si_uid)       == 0x10);
+static_assert(offsetof(compat_siginfo_t, si_tid)       == 0x0c);
+static_assert(offsetof(compat_siginfo_t, si_overrun)   == 0x10);
+static_assert(offsetof(compat_siginfo_t, si_status)    == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_utime)     == 0x18);
+static_assert(offsetof(compat_siginfo_t, si_stime)     == 0x1c);
+static_assert(offsetof(compat_siginfo_t, si_value)     == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_int)       == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_ptr)       == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_addr)      == 0x0c);
+static_assert(offsetof(compat_siginfo_t, si_trapno)    == 0x10);
+static_assert(offsetof(compat_siginfo_t, si_addr_lsb)  == 0x10);
+static_assert(offsetof(compat_siginfo_t, si_lower)     == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_upper)     == 0x18);
+static_assert(offsetof(compat_siginfo_t, si_pkey)      == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_perf_data) == 0x10);
+static_assert(offsetof(compat_siginfo_t, si_perf_type) == 0x14);
+static_assert(offsetof(compat_siginfo_t, si_band)      == 0x0c);
+static_assert(offsetof(compat_siginfo_t, si_fd)                == 0x10);

diff --git a/arch/sparc/kernel/signal_64.c b/arch/sparc/kernel/signal_64.c
index a0eec62..cea23cf 100644 (file)
--- a/arch/sparc/kernel/signal_64.c
+++ b/arch/sparc/kernel/signal_64.c
@@ -556,3 +556,39 @@ void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long
        user_enter();
 }
 
+/*
+ * Compile-time assertions for siginfo_t offsets. Check NSIG* as well, as
+ * changes likely come with new fields that should be added below.
+ */
+static_assert(NSIGILL  == 11);
+static_assert(NSIGFPE  == 15);
+static_assert(NSIGSEGV == 9);
+static_assert(NSIGBUS  == 5);
+static_assert(NSIGTRAP == 6);
+static_assert(NSIGCHLD == 6);
+static_assert(NSIGSYS  == 2);
+static_assert(sizeof(siginfo_t) == 128);
+static_assert(__alignof__(siginfo_t) == 8);
+static_assert(offsetof(siginfo_t, si_signo)    == 0x00);
+static_assert(offsetof(siginfo_t, si_errno)    == 0x04);
+static_assert(offsetof(siginfo_t, si_code)     == 0x08);
+static_assert(offsetof(siginfo_t, si_pid)      == 0x10);
+static_assert(offsetof(siginfo_t, si_uid)      == 0x14);
+static_assert(offsetof(siginfo_t, si_tid)      == 0x10);
+static_assert(offsetof(siginfo_t, si_overrun)  == 0x14);
+static_assert(offsetof(siginfo_t, si_status)   == 0x18);
+static_assert(offsetof(siginfo_t, si_utime)    == 0x20);
+static_assert(offsetof(siginfo_t, si_stime)    == 0x28);
+static_assert(offsetof(siginfo_t, si_value)    == 0x18);
+static_assert(offsetof(siginfo_t, si_int)      == 0x18);
+static_assert(offsetof(siginfo_t, si_ptr)      == 0x18);
+static_assert(offsetof(siginfo_t, si_addr)     == 0x10);
+static_assert(offsetof(siginfo_t, si_trapno)   == 0x18);
+static_assert(offsetof(siginfo_t, si_addr_lsb) == 0x18);
+static_assert(offsetof(siginfo_t, si_lower)    == 0x20);
+static_assert(offsetof(siginfo_t, si_upper)    == 0x28);
+static_assert(offsetof(siginfo_t, si_pkey)     == 0x20);
+static_assert(offsetof(siginfo_t, si_perf_data)        == 0x18);
+static_assert(offsetof(siginfo_t, si_perf_type)        == 0x20);
+static_assert(offsetof(siginfo_t, si_band)     == 0x10);
+static_assert(offsetof(siginfo_t, si_fd)       == 0x14);

diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c
index be77538..082a551 100644 (file)
--- a/arch/sparc/kernel/sys_sparc_32.c
+++ b/arch/sparc/kernel/sys_sparc_32.c
@@ -151,7 +151,7 @@ sparc_breakpoint (struct pt_regs *regs)
 #ifdef DEBUG_SPARC_BREAKPOINT
         printk ("TRAP: Entering kernel PC=%x, nPC=%x\n", regs->pc, regs->npc);
 #endif
-       force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc, 0);
+       force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->pc);
 
 #ifdef DEBUG_SPARC_BREAKPOINT
        printk ("TRAP: Returning to space: PC=%x nPC=%x\n", regs->pc, regs->npc);

diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c
index 6b92fad..1e9a9e0 100644 (file)
--- a/arch/sparc/kernel/sys_sparc_64.c
+++ b/arch/sparc/kernel/sys_sparc_64.c
@@ -514,7 +514,7 @@ asmlinkage void sparc_breakpoint(struct pt_regs *regs)
 #ifdef DEBUG_SPARC_BREAKPOINT
         printk ("TRAP: Entering kernel PC=%lx, nPC=%lx\n", regs->tpc, regs->tnpc);
 #endif
-       force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->tpc, 0);
+       force_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *)regs->tpc);
 #ifdef DEBUG_SPARC_BREAKPOINT
        printk ("TRAP: Returning to space: PC=%lx nPC=%lx\n", regs->tpc, regs->tnpc);
 #endif

diff --git a/arch/sparc/kernel/traps_32.c b/arch/sparc/kernel/traps_32.c
index 247a0d9..5630e5a 100644 (file)
--- a/arch/sparc/kernel/traps_32.c
+++ b/arch/sparc/kernel/traps_32.c
@@ -102,8 +102,8 @@ void do_hw_interrupt(struct pt_regs *regs, unsigned long type)
        if(regs->psr & PSR_PS)
                die_if_kernel("Kernel bad trap", regs);
 
-       force_sig_fault(SIGILL, ILL_ILLTRP,
-                       (void __user *)regs->pc, type - 0x80);
+       force_sig_fault_trapno(SIGILL, ILL_ILLTRP,
+                              (void __user *)regs->pc, type - 0x80);
 }
 
 void do_illegal_instruction(struct pt_regs *regs, unsigned long pc, unsigned long npc,
@@ -116,7 +116,7 @@ void do_illegal_instruction(struct pt_regs *regs, unsigned long pc, unsigned lon
               regs->pc, *(unsigned long *)regs->pc);
 #endif
 
-       send_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc, 0, current);
+       send_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc, current);
 }
 
 void do_priv_instruction(struct pt_regs *regs, unsigned long pc, unsigned long npc,
@@ -124,7 +124,7 @@ void do_priv_instruction(struct pt_regs *regs, unsigned long pc, unsigned long n
 {
        if(psr & PSR_PS)
                die_if_kernel("Penguin instruction from Penguin mode??!?!", regs);
-       send_sig_fault(SIGILL, ILL_PRVOPC, (void __user *)pc, 0, current);
+       send_sig_fault(SIGILL, ILL_PRVOPC, (void __user *)pc, current);
 }
 
 /* XXX User may want to be allowed to do this. XXX */
@@ -145,7 +145,7 @@ void do_memaccess_unaligned(struct pt_regs *regs, unsigned long pc, unsigned lon
 #endif
        send_sig_fault(SIGBUS, BUS_ADRALN,
                       /* FIXME: Should dig out mna address */ (void *)0,
-                      0, current);
+                      current);
 }
 
 static unsigned long init_fsr = 0x0UL;
@@ -291,7 +291,7 @@ void do_fpe_trap(struct pt_regs *regs, unsigned long pc, unsigned long npc,
                else if (fsr & 0x01)
                        code = FPE_FLTRES;
        }
-       send_sig_fault(SIGFPE, code, (void __user *)pc, 0, fpt);
+       send_sig_fault(SIGFPE, code, (void __user *)pc, fpt);
 #ifndef CONFIG_SMP
        last_task_used_math = NULL;
 #endif
@@ -305,7 +305,7 @@ void handle_tag_overflow(struct pt_regs *regs, unsigned long pc, unsigned long n
 {
        if(psr & PSR_PS)
                die_if_kernel("Penguin overflow trap from kernel mode", regs);
-       send_sig_fault(SIGEMT, EMT_TAGOVF, (void __user *)pc, 0, current);
+       send_sig_fault(SIGEMT, EMT_TAGOVF, (void __user *)pc, current);
 }
 
 void handle_watchpoint(struct pt_regs *regs, unsigned long pc, unsigned long npc,
@@ -327,13 +327,13 @@ void handle_reg_access(struct pt_regs *regs, unsigned long pc, unsigned long npc
        printk("Register Access Exception at PC %08lx NPC %08lx PSR %08lx\n",
               pc, npc, psr);
 #endif
-       force_sig_fault(SIGBUS, BUS_OBJERR, (void __user *)pc, 0);
+       force_sig_fault(SIGBUS, BUS_OBJERR, (void __user *)pc);
 }
 
 void handle_cp_disabled(struct pt_regs *regs, unsigned long pc, unsigned long npc,
                        unsigned long psr)
 {
-       send_sig_fault(SIGILL, ILL_COPROC, (void __user *)pc, 0, current);
+       send_sig_fault(SIGILL, ILL_COPROC, (void __user *)pc, current);
 }
 
 void handle_cp_exception(struct pt_regs *regs, unsigned long pc, unsigned long npc,
@@ -343,13 +343,13 @@ void handle_cp_exception(struct pt_regs *regs, unsigned long pc, unsigned long n
        printk("Co-Processor Exception at PC %08lx NPC %08lx PSR %08lx\n",
               pc, npc, psr);
 #endif
-       send_sig_fault(SIGILL, ILL_COPROC, (void __user *)pc, 0, current);
+       send_sig_fault(SIGILL, ILL_COPROC, (void __user *)pc, current);
 }
 
 void handle_hw_divzero(struct pt_regs *regs, unsigned long pc, unsigned long npc,
                       unsigned long psr)
 {
-       send_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)pc, 0, current);
+       send_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)pc, current);
 }
 
 #ifdef CONFIG_DEBUG_BUGVERBOSE

diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c
index a850dcc..6863025 100644 (file)
--- a/arch/sparc/kernel/traps_64.c
+++ b/arch/sparc/kernel/traps_64.c
@@ -107,8 +107,8 @@ void bad_trap(struct pt_regs *regs, long lvl)
                regs->tpc &= 0xffffffff;
                regs->tnpc &= 0xffffffff;
        }
-       force_sig_fault(SIGILL, ILL_ILLTRP,
-                       (void __user *)regs->tpc, lvl);
+       force_sig_fault_trapno(SIGILL, ILL_ILLTRP,
+                              (void __user *)regs->tpc, lvl);
 }
 
 void bad_trap_tl1(struct pt_regs *regs, long lvl)
@@ -201,8 +201,7 @@ void spitfire_insn_access_exception(struct pt_regs *regs, unsigned long sfsr, un
                regs->tpc &= 0xffffffff;
                regs->tnpc &= 0xffffffff;
        }
-       force_sig_fault(SIGSEGV, SEGV_MAPERR,
-                       (void __user *)regs->tpc, 0);
+       force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)regs->tpc);
 out:
        exception_exit(prev_state);
 }
@@ -237,7 +236,7 @@ void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsig
                regs->tpc &= 0xffffffff;
                regs->tnpc &= 0xffffffff;
        }
-       force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *) addr, 0);
+       force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *) addr);
 }
 
 void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx)
@@ -321,7 +320,7 @@ void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, un
        if (is_no_fault_exception(regs))
                return;
 
-       force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)sfar, 0);
+       force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)sfar);
 out:
        exception_exit(prev_state);
 }
@@ -385,13 +384,13 @@ void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsig
         */
        switch (type) {
        case HV_FAULT_TYPE_INV_ASI:
-               force_sig_fault(SIGILL, ILL_ILLADR, (void __user *)addr, 0);
+               force_sig_fault(SIGILL, ILL_ILLADR, (void __user *)addr);
                break;
        case HV_FAULT_TYPE_MCD_DIS:
-               force_sig_fault(SIGSEGV, SEGV_ACCADI, (void __user *)addr, 0);
+               force_sig_fault(SIGSEGV, SEGV_ACCADI, (void __user *)addr);
                break;
        default:
-               force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)addr, 0);
+               force_sig_fault(SIGSEGV, SEGV_MAPERR, (void __user *)addr);
                break;
        }
 }
@@ -568,7 +567,7 @@ static void spitfire_ue_log(unsigned long afsr, unsigned long afar, unsigned lon
                regs->tpc &= 0xffffffff;
                regs->tnpc &= 0xffffffff;
        }
-       force_sig_fault(SIGBUS, BUS_OBJERR, (void *)0, 0);
+       force_sig_fault(SIGBUS, BUS_OBJERR, (void *)0);
 }
 
 void spitfire_access_error(struct pt_regs *regs, unsigned long status_encoded, unsigned long afar)
@@ -2069,8 +2068,7 @@ void do_mcd_err(struct pt_regs *regs, struct sun4v_error_entry ent)
        /* Send SIGSEGV to the userspace process with the right signal
         * code
         */
-       force_sig_fault(SIGSEGV, SEGV_ADIDERR, (void __user *)ent.err_raddr,
-                       0);
+       force_sig_fault(SIGSEGV, SEGV_ADIDERR, (void __user *)ent.err_raddr);
 }
 
 /* We run with %pil set to PIL_NORMAL_MAX and PSTATE_IE enabled in %pstate.
@@ -2184,7 +2182,7 @@ bool sun4v_nonresum_error_user_handled(struct pt_regs *regs,
        }
        if (attrs & SUN4V_ERR_ATTRS_PIO) {
                force_sig_fault(SIGBUS, BUS_ADRERR,
-                               (void __user *)sun4v_get_vaddr(regs), 0);
+                               (void __user *)sun4v_get_vaddr(regs));
                return true;
        }
 
@@ -2340,8 +2338,7 @@ static void do_fpe_common(struct pt_regs *regs)
                        else if (fsr & 0x01)
                                code = FPE_FLTRES;
                }
-               force_sig_fault(SIGFPE, code,
-                               (void __user *)regs->tpc, 0);
+               force_sig_fault(SIGFPE, code, (void __user *)regs->tpc);
        }
 }
 
@@ -2395,8 +2392,7 @@ void do_tof(struct pt_regs *regs)
                regs->tpc &= 0xffffffff;
                regs->tnpc &= 0xffffffff;
        }
-       force_sig_fault(SIGEMT, EMT_TAGOVF,
-                       (void __user *)regs->tpc, 0);
+       force_sig_fault(SIGEMT, EMT_TAGOVF, (void __user *)regs->tpc);
 out:
        exception_exit(prev_state);
 }
@@ -2415,8 +2411,7 @@ void do_div0(struct pt_regs *regs)
                regs->tpc &= 0xffffffff;
                regs->tnpc &= 0xffffffff;
        }
-       force_sig_fault(SIGFPE, FPE_INTDIV,
-                       (void __user *)regs->tpc, 0);
+       force_sig_fault(SIGFPE, FPE_INTDIV, (void __user *)regs->tpc);
 out:
        exception_exit(prev_state);
 }
@@ -2612,7 +2607,7 @@ void do_illegal_instruction(struct pt_regs *regs)
                        }
                }
        }
-       force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc, 0);
+       force_sig_fault(SIGILL, ILL_ILLOPC, (void __user *)pc);
 out:
        exception_exit(prev_state);
 }
@@ -2632,7 +2627,7 @@ void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned lo
        if (is_no_fault_exception(regs))
                return;
 
-       force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)sfar, 0);
+       force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *)sfar);
 out:
        exception_exit(prev_state);
 }
@@ -2650,7 +2645,7 @@ void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_c
        if (is_no_fault_exception(regs))
                return;
 
-       force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) addr, 0);
+       force_sig_fault(SIGBUS, BUS_ADRALN, (void __user *) addr);
 }
 
 /* sun4v_mem_corrupt_detect_precise() - Handle precise exception on an ADI
@@ -2697,7 +2692,7 @@ void sun4v_mem_corrupt_detect_precise(struct pt_regs *regs, unsigned long addr,
                regs->tpc &= 0xffffffff;
                regs->tnpc &= 0xffffffff;
        }
-       force_sig_fault(SIGSEGV, SEGV_ADIPERR, (void __user *)addr, 0);
+       force_sig_fault(SIGSEGV, SEGV_ADIPERR, (void __user *)addr);
 }
 
 void do_privop(struct pt_regs *regs)
@@ -2712,8 +2707,7 @@ void do_privop(struct pt_regs *regs)
                regs->tpc &= 0xffffffff;
                regs->tnpc &= 0xffffffff;
        }
-       force_sig_fault(SIGILL, ILL_PRVOPC,
-                       (void __user *)regs->tpc, 0);
+       force_sig_fault(SIGILL, ILL_PRVOPC, (void __user *)regs->tpc);
 out:
        exception_exit(prev_state);
 }

diff --git a/arch/sparc/kernel/unaligned_32.c b/arch/sparc/kernel/unaligned_32.c
index ef5c520..455f025 100644 (file)
--- a/arch/sparc/kernel/unaligned_32.c
+++ b/arch/sparc/kernel/unaligned_32.c
@@ -278,5 +278,5 @@ asmlinkage void user_unaligned_trap(struct pt_regs *regs, unsigned int insn)
 {
        send_sig_fault(SIGBUS, BUS_ADRALN,
                       (void __user *)safe_compute_effective_address(regs, insn),
-                      0, current);
+                      current);
 }

diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c
index de2031c..fa85862 100644 (file)
--- a/arch/sparc/mm/fault_32.c
+++ b/arch/sparc/mm/fault_32.c
@@ -83,7 +83,7 @@ static void __do_fault_siginfo(int code, int sig, struct pt_regs *regs,
                show_signal_msg(regs, sig, code,
                                addr, current);
 
-       force_sig_fault(sig, code, (void __user *) addr, 0);
+       force_sig_fault(sig, code, (void __user *) addr);
 }
 
 static unsigned long compute_si_addr(struct pt_regs *regs, int text_fault)

diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c
index 0a6bcc8..9a9652a 100644 (file)
--- a/arch/sparc/mm/fault_64.c
+++ b/arch/sparc/mm/fault_64.c
@@ -176,7 +176,7 @@ static void do_fault_siginfo(int code, int sig, struct pt_regs *regs,
        if (unlikely(show_unhandled_signals))
                show_signal_msg(regs, sig, code, addr, current);
 
-       force_sig_fault(sig, code, (void __user *) addr, 0);
+       force_sig_fault(sig, code, (void __user *) addr);
 }
 
 static unsigned int get_fault_insn(struct pt_regs *regs, unsigned int insn)

diff --git a/arch/x86/kernel/signal_compat.c b/arch/x86/kernel/signal_compat.c
index 06743ec..b52407c 100644 (file)
--- a/arch/x86/kernel/signal_compat.c
+++ b/arch/x86/kernel/signal_compat.c
@@ -34,7 +34,13 @@ static inline void signal_compat_build_tests(void)
        BUILD_BUG_ON(NSIGSYS  != 2);
 
        /* This is part of the ABI and can never change in size: */
+       BUILD_BUG_ON(sizeof(siginfo_t) != 128);
        BUILD_BUG_ON(sizeof(compat_siginfo_t) != 128);
+
+       /* This is a part of the ABI and can never change in alignment */
+       BUILD_BUG_ON(__alignof__(siginfo_t) != 8);
+       BUILD_BUG_ON(__alignof__(compat_siginfo_t) != 4);
+
        /*
         * The offsets of all the (unioned) si_fields are fixed
         * in the ABI, of course.  Make sure none of them ever

diff --git a/fs/signalfd.c b/fs/signalfd.c
index 167b588..040e1cf 100644 (file)
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -114,10 +114,10 @@ static int signalfd_copyinfo(struct signalfd_siginfo __user *uinfo,
                break;
        case SIL_FAULT_BNDERR:
        case SIL_FAULT_PKUERR:
-       case SIL_PERF_EVENT:
+       case SIL_FAULT_PERF_EVENT:
                /*
                 * Fall through to the SIL_FAULT case.  SIL_FAULT_BNDERR,
-                * SIL_FAULT_PKUERR, and SIL_PERF_EVENT are only
+                * SIL_FAULT_PKUERR, and SIL_FAULT_PERF_EVENT are only
                 * generated by faults that deliver them synchronously to
                 * userspace.  In case someone injects one of these signals
                 * and signalfd catches it treat it as SIL_FAULT.

diff --git a/include/linux/sched/signal.h b/include/linux/sched/signal.h
index 0310a5a..548986c 100644 (file)
--- a/include/linux/sched/signal.h
+++ b/include/linux/sched/signal.h
@@ -298,11 +298,6 @@ static inline void kernel_signal_stop(void)
 
        schedule();
 }
-#ifdef __ARCH_SI_TRAPNO
-# define ___ARCH_SI_TRAPNO(_a1) , _a1
-#else
-# define ___ARCH_SI_TRAPNO(_a1)
-#endif
 #ifdef __ia64__
 # define ___ARCH_SI_IA64(_a1, _a2, _a3) , _a1, _a2, _a3
 #else
@@ -310,14 +305,11 @@ static inline void kernel_signal_stop(void)
 #endif
 
 int force_sig_fault_to_task(int sig, int code, void __user *addr
-       ___ARCH_SI_TRAPNO(int trapno)
        ___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr)
        , struct task_struct *t);
 int force_sig_fault(int sig, int code, void __user *addr
-       ___ARCH_SI_TRAPNO(int trapno)
        ___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr));
 int send_sig_fault(int sig, int code, void __user *addr
-       ___ARCH_SI_TRAPNO(int trapno)
        ___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr)
        , struct task_struct *t);
 
@@ -329,6 +321,9 @@ int force_sig_pkuerr(void __user *addr, u32 pkey);
 int force_sig_perf(void __user *addr, u32 type, u64 sig_data);
 
 int force_sig_ptrace_errno_trap(int errno, void __user *addr);
+int force_sig_fault_trapno(int sig, int code, void __user *addr, int trapno);
+int send_sig_fault_trapno(int sig, int code, void __user *addr, int trapno,
+                       struct task_struct *t);
 
 extern int send_sig_info(int, struct kernel_siginfo *, struct task_struct *);
 extern void force_sigsegv(int sig);

diff --git a/include/linux/signal.h b/include/linux/signal.h
index 3454c7f..3f96a63 100644 (file)
--- a/include/linux/signal.h
+++ b/include/linux/signal.h
@@ -44,7 +44,7 @@ enum siginfo_layout {
        SIL_FAULT_MCEERR,
        SIL_FAULT_BNDERR,
        SIL_FAULT_PKUERR,
-       SIL_PERF_EVENT,
+       SIL_FAULT_PERF_EVENT,
        SIL_CHLD,
        SIL_RT,
        SIL_SYS,

diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h
index 5a3c221..3ba180f 100644 (file)
--- a/include/uapi/asm-generic/siginfo.h
+++ b/include/uapi/asm-generic/siginfo.h
@@ -29,6 +29,11 @@ typedef union sigval {
 #define __ARCH_SI_ATTRIBUTES
 #endif
 
+/*
+ * Be careful when extending this union.  On 32bit siginfo_t is 32bit
+ * aligned.  Which means that a 64bit field or any other field that
+ * would increase the alignment of siginfo_t will break the ABI.
+ */
 union __sifields {
        /* kill() */
        struct {

diff --git a/kernel/signal.c b/kernel/signal.c
index 52b6abe..65a5411 100644 (file)
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1213,7 +1213,7 @@ static inline bool has_si_pid_and_uid(struct kernel_siginfo *info)
        case SIL_FAULT_MCEERR:
        case SIL_FAULT_BNDERR:
        case SIL_FAULT_PKUERR:
-       case SIL_PERF_EVENT:
+       case SIL_FAULT_PERF_EVENT:
        case SIL_SYS:
                ret = false;
                break;
@@ -1681,7 +1681,6 @@ void force_sigsegv(int sig)
 }
 
 int force_sig_fault_to_task(int sig, int code, void __user *addr
-       ___ARCH_SI_TRAPNO(int trapno)
        ___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr)
        , struct task_struct *t)
 {
@@ -1692,9 +1691,6 @@ int force_sig_fault_to_task(int sig, int code, void __user *addr
        info.si_errno = 0;
        info.si_code  = code;
        info.si_addr  = addr;
-#ifdef __ARCH_SI_TRAPNO
-       info.si_trapno = trapno;
-#endif
 #ifdef __ia64__
        info.si_imm = imm;
        info.si_flags = flags;
@@ -1704,16 +1700,13 @@ int force_sig_fault_to_task(int sig, int code, void __user *addr
 }
 
 int force_sig_fault(int sig, int code, void __user *addr
-       ___ARCH_SI_TRAPNO(int trapno)
        ___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr))
 {
        return force_sig_fault_to_task(sig, code, addr
-                                      ___ARCH_SI_TRAPNO(trapno)
                                       ___ARCH_SI_IA64(imm, flags, isr), current);
 }
 
 int send_sig_fault(int sig, int code, void __user *addr
-       ___ARCH_SI_TRAPNO(int trapno)
        ___ARCH_SI_IA64(int imm, unsigned int flags, unsigned long isr)
        , struct task_struct *t)
 {
@@ -1724,9 +1717,6 @@ int send_sig_fault(int sig, int code, void __user *addr
        info.si_errno = 0;
        info.si_code  = code;
        info.si_addr  = addr;
-#ifdef __ARCH_SI_TRAPNO
-       info.si_trapno = trapno;
-#endif
 #ifdef __ia64__
        info.si_imm = imm;
        info.si_flags = flags;
@@ -1823,6 +1813,39 @@ int force_sig_ptrace_errno_trap(int errno, void __user *addr)
        return force_sig_info(&info);
 }
 
+/* For the rare architectures that include trap information using
+ * si_trapno.
+ */
+int force_sig_fault_trapno(int sig, int code, void __user *addr, int trapno)
+{
+       struct kernel_siginfo info;
+
+       clear_siginfo(&info);
+       info.si_signo = sig;
+       info.si_errno = 0;
+       info.si_code  = code;
+       info.si_addr  = addr;
+       info.si_trapno = trapno;
+       return force_sig_info(&info);
+}
+
+/* For the rare architectures that include trap information using
+ * si_trapno.
+ */
+int send_sig_fault_trapno(int sig, int code, void __user *addr, int trapno,
+                         struct task_struct *t)
+{
+       struct kernel_siginfo info;
+
+       clear_siginfo(&info);
+       info.si_signo = sig;
+       info.si_errno = 0;
+       info.si_code  = code;
+       info.si_addr  = addr;
+       info.si_trapno = trapno;
+       return send_sig_info(info.si_signo, &info, t);
+}
+
 int kill_pgrp(struct pid *pid, int sig, int priv)
 {
        int ret;
@@ -2572,7 +2595,7 @@ static void hide_si_addr_tag_bits(struct ksignal *ksig)
        case SIL_FAULT_MCEERR:
        case SIL_FAULT_BNDERR:
        case SIL_FAULT_PKUERR:
-       case SIL_PERF_EVENT:
+       case SIL_FAULT_PERF_EVENT:
                ksig->info.si_addr = arch_untagged_si_addr(
                        ksig->info.si_addr, ksig->sig, ksig->info.si_code);
                break;
@@ -3257,11 +3280,14 @@ enum siginfo_layout siginfo_layout(unsigned sig, int si_code)
                                layout = SIL_FAULT_PKUERR;
 #endif
                        else if ((sig == SIGTRAP) && (si_code == TRAP_PERF))
-                               layout = SIL_PERF_EVENT;
-#ifdef __ARCH_SI_TRAPNO
-                       else if (layout == SIL_FAULT)
+                               layout = SIL_FAULT_PERF_EVENT;
+                       else if (IS_ENABLED(CONFIG_SPARC) &&
+                                (sig == SIGILL) && (si_code == ILL_ILLTRP))
+                               layout = SIL_FAULT_TRAPNO;
+                       else if (IS_ENABLED(CONFIG_ALPHA) &&
+                                ((sig == SIGFPE) ||
+                                 ((sig == SIGTRAP) && (si_code == TRAP_UNK))))
                                layout = SIL_FAULT_TRAPNO;
-#endif
                }
                else if (si_code <= NSIGPOLL)
                        layout = SIL_POLL;
@@ -3383,7 +3409,7 @@ void copy_siginfo_to_external32(struct compat_siginfo *to,
                to->si_addr = ptr_to_compat(from->si_addr);
                to->si_pkey = from->si_pkey;
                break;
-       case SIL_PERF_EVENT:
+       case SIL_FAULT_PERF_EVENT:
                to->si_addr = ptr_to_compat(from->si_addr);
                to->si_perf_data = from->si_perf_data;
                to->si_perf_type = from->si_perf_type;
@@ -3460,7 +3486,7 @@ static int post_copy_siginfo_from_user32(kernel_siginfo_t *to,
                to->si_addr = compat_ptr(from->si_addr);
                to->si_pkey = from->si_pkey;
                break;
-       case SIL_PERF_EVENT:
+       case SIL_FAULT_PERF_EVENT:
                to->si_addr = compat_ptr(from->si_addr);
                to->si_perf_data = from->si_perf_data;
                to->si_perf_type = from->si_perf_type;