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Subject[linux-stable-rc:queue/4.14 3742/9999] arch/powerpc/kernel/traps.c:1658:6: error: no previous declaration for 'DebugException'
Hi Dirk,

First bad commit (maybe != root cause):

tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git queue/4.14
head: 93489bfff5495e498b3932e011b0221ff242e0b7
commit: 88f7a6aa7fb9aa5076b65489146045dac865f1d3 [3742/9999] scripts/dtc: Remove redundant YYLOC global declaration
config: powerpc-randconfig-r003-20211214 (https://download.01.org/0day-ci/archive/20211215/202112151740.QoiLaP9D-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 7.5.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git/commit/?id=88f7a6aa7fb9aa5076b65489146045dac865f1d3
git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git fetch --no-tags linux-stable-rc queue/4.14
git checkout 88f7a6aa7fb9aa5076b65489146045dac865f1d3
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

In file included from include/linux/uaccess.h:14:0,
from arch/powerpc/include/asm/sections.h:7,
from include/linux/interrupt.h:22,
from arch/powerpc/kernel/traps.c:27:
arch/powerpc/kernel/traps.c: In function 'emulate_string_inst':
arch/powerpc/include/asm/uaccess.h:52:35: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits]
(((size) == 0) || (((size) - 1) <= ((segment).seg - (addr)))))
^
arch/powerpc/include/asm/uaccess.h:58:3: note: in expansion of macro '__access_ok'
__access_ok((__force unsigned long)(addr), (size), get_fs()))
^~~~~~~~~~~
arch/powerpc/include/asm/uaccess.h:253:6: note: in expansion of macro 'access_ok'
if (access_ok(VERIFY_READ, __gu_addr, (size))) { \
^~~~~~~~~
arch/powerpc/include/asm/uaccess.h:80:2: note: in expansion of macro '__get_user_check'
__get_user_check((x), (ptr), sizeof(*(ptr)))
^~~~~~~~~~~~~~~~
arch/powerpc/kernel/traps.c:889:9: note: in expansion of macro 'get_user'
if (get_user(val, (u8 __user *)EA))
^~~~~~~~
arch/powerpc/include/asm/uaccess.h:52:35: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits]
(((size) == 0) || (((size) - 1) <= ((segment).seg - (addr)))))
^
arch/powerpc/include/asm/uaccess.h:58:3: note: in expansion of macro '__access_ok'
__access_ok((__force unsigned long)(addr), (size), get_fs()))
^~~~~~~~~~~
arch/powerpc/include/asm/uaccess.h:160:6: note: in expansion of macro 'access_ok'
if (access_ok(VERIFY_WRITE, __pu_addr, size)) \
^~~~~~~~~
arch/powerpc/include/asm/uaccess.h:82:2: note: in expansion of macro '__put_user_check'
__put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
^~~~~~~~~~~~~~~~
arch/powerpc/kernel/traps.c:900:9: note: in expansion of macro 'put_user'
if (put_user(val, (u8 __user *)EA))
^~~~~~~~
arch/powerpc/kernel/traps.c: At top level:
arch/powerpc/kernel/traps.c:1281:6: error: no previous declaration for 'slb_miss_bad_addr' [-Werror=missing-declarations]
void slb_miss_bad_addr(struct pt_regs *regs)
^~~~~~~~~~~~~~~~~
>> arch/powerpc/kernel/traps.c:1658:6: error: no previous declaration for 'DebugException' [-Werror=missing-declarations]
void DebugException(struct pt_regs *regs, unsigned long debug_status)
^~~~~~~~~~~~~~
>> arch/powerpc/kernel/traps.c:1771:6: error: no previous declaration for 'CacheLockingException' [-Werror=missing-declarations]
void CacheLockingException(struct pt_regs *regs, unsigned long address,
^~~~~~~~~~~~~~~~~~~~~
arch/powerpc/kernel/traps.c:1785:6: error: no previous declaration for 'SPEFloatingPointException' [-Werror=missing-declarations]
void SPEFloatingPointException(struct pt_regs *regs)
^~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/powerpc/kernel/traps.c:1833:6: error: no previous declaration for 'SPEFloatingPointRoundException' [-Werror=missing-declarations]
void SPEFloatingPointRoundException(struct pt_regs *regs)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/kernel/traps.c:1884:29: error: no previous declaration for 'WatchdogHandler' [-Werror=missing-declarations]
void __attribute__ ((weak)) WatchdogHandler(struct pt_regs *regs)
^~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
--
In file included from include/linux/uaccess.h:14:0,
from include/asm-generic/termios-base.h:8,
from arch/powerpc/include/asm/termios.h:20,
from include/uapi/linux/termios.h:6,
from include/linux/tty.h:7,
from arch/powerpc/kernel/setup_32.c:13:
include/asm-generic/termios-base.h: In function 'user_termio_to_kernel_termios':
arch/powerpc/include/asm/uaccess.h:52:35: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits]
(((size) == 0) || (((size) - 1) <= ((segment).seg - (addr)))))
^
arch/powerpc/include/asm/uaccess.h:58:3: note: in expansion of macro '__access_ok'
__access_ok((__force unsigned long)(addr), (size), get_fs()))
^~~~~~~~~~~
arch/powerpc/include/asm/uaccess.h:253:6: note: in expansion of macro 'access_ok'
if (access_ok(VERIFY_READ, __gu_addr, (size))) { \
^~~~~~~~~
arch/powerpc/include/asm/uaccess.h:80:2: note: in expansion of macro '__get_user_check'
__get_user_check((x), (ptr), sizeof(*(ptr)))
^~~~~~~~~~~~~~~~
include/asm-generic/termios-base.h:36:6: note: in expansion of macro 'get_user'
if (get_user(termios->c_line, &termio->c_line) < 0)
^~~~~~~~
include/asm-generic/termios-base.h: In function 'kernel_termios_to_user_termio':
arch/powerpc/include/asm/uaccess.h:52:35: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits]
(((size) == 0) || (((size) - 1) <= ((segment).seg - (addr)))))
^
arch/powerpc/include/asm/uaccess.h:58:3: note: in expansion of macro '__access_ok'
__access_ok((__force unsigned long)(addr), (size), get_fs()))
^~~~~~~~~~~
arch/powerpc/include/asm/uaccess.h:160:6: note: in expansion of macro 'access_ok'
if (access_ok(VERIFY_WRITE, __pu_addr, size)) \
^~~~~~~~~
arch/powerpc/include/asm/uaccess.h:82:2: note: in expansion of macro '__put_user_check'
__put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
^~~~~~~~~~~~~~~~
include/asm-generic/termios-base.h:58:6: note: in expansion of macro 'put_user'
put_user(termios->c_line, &termio->c_line) < 0 ||
^~~~~~~~
arch/powerpc/kernel/setup_32.c: At top level:
arch/powerpc/kernel/setup_32.c:68:30: error: no previous declaration for 'early_init' [-Werror=missing-declarations]
notrace unsigned long __init early_init(unsigned long dt_ptr)
^~~~~~~~~~
arch/powerpc/kernel/setup_32.c:99:21: error: no previous declaration for 'machine_init' [-Werror=missing-declarations]
notrace void __init machine_init(u64 dt_ptr)
^~~~~~~~~~~~
arch/powerpc/kernel/setup_32.c:124:12: error: no previous declaration for 'ppc_setup_l2cr' [-Werror=missing-declarations]
int __init ppc_setup_l2cr(char *str)
^~~~~~~~~~~~~~
arch/powerpc/kernel/setup_32.c:137:12: error: no previous declaration for 'ppc_setup_l3cr' [-Werror=missing-declarations]
int __init ppc_setup_l3cr(char *str)
^~~~~~~~~~~~~~
arch/powerpc/kernel/setup_32.c:183:12: error: no previous declaration for 'ppc_init' [-Werror=missing-declarations]
int __init ppc_init(void)
^~~~~~~~
arch/powerpc/kernel/setup_32.c:198:13: error: no previous declaration for 'irqstack_early_init' [-Werror=missing-declarations]
void __init irqstack_early_init(void)
^~~~~~~~~~~~~~~~~~~
>> arch/powerpc/kernel/setup_32.c:213:13: error: no previous declaration for 'exc_lvl_early_init' [-Werror=missing-declarations]
void __init exc_lvl_early_init(void)
^~~~~~~~~~~~~~~~~~
arch/powerpc/kernel/setup_32.c:238:13: error: no previous declaration for 'setup_power_save' [-Werror=missing-declarations]
void __init setup_power_save(void)
^~~~~~~~~~~~~~~~
arch/powerpc/kernel/setup_32.c:253:13: error: no previous declaration for 'initialize_cache_info' [-Werror=missing-declarations]
__init void initialize_cache_info(void)
^~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
--
>> arch/powerpc/mm/fsl_booke_mmu.c:70:15: error: no previous declaration for 'tlbcam_sz' [-Werror=missing-declarations]
unsigned long tlbcam_sz(int idx)
^~~~~~~~~
>> arch/powerpc/mm/fsl_booke_mmu.c:269:21: error: no previous declaration for 'relocate_init' [-Werror=missing-declarations]
notrace void __init relocate_init(u64 dt_ptr, phys_addr_t start)
^~~~~~~~~~~~~
cc1: all warnings being treated as errors
--
In file included from include/linux/hugetlb.h:444:0,
from arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:50:
arch/powerpc/include/asm/hugetlb.h: In function 'huge_ptep_clear_flush':
arch/powerpc/include/asm/hugetlb.h:167:8: error: variable 'pte' set but not used [-Werror=unused-but-set-variable]
pte_t pte;
^~~
arch/powerpc/kvm/../../../virt/kvm/kvm_main.c: At top level:
>> arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:140:13: error: no previous declaration for 'kvm_arch_mmu_notifier_invalidate_range' [-Werror=missing-declarations]
__weak void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:635:12: error: no previous declaration for 'kvm_arch_post_init_vm' [-Werror=missing-declarations]
int __weak kvm_arch_post_init_vm(struct kvm *kvm)
^~~~~~~~~~~~~~~~~~~~~
>> arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:644:13: error: no previous declaration for 'kvm_arch_pre_destroy_vm' [-Werror=missing-declarations]
void __weak kvm_arch_pre_destroy_vm(struct kvm *kvm)
^~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/kvm_host.h:14:0,
from arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:21:
include/linux/signal.h: In function 'sigemptyset':
include/linux/signal.h:178:22: error: this statement may fall through [-Werror=implicit-fallthrough=]
case 2: set->sig[1] = 0;
~~~~~~~~~~~~^~~
include/linux/signal.h:179:2: note: here
case 1: set->sig[0] = 0;
^~~~
cc1: all warnings being treated as errors
--
>> arch/powerpc/kvm/booke.c:602:6: error: no previous declaration for 'kvmppc_watchdog_func' [-Werror=missing-declarations]
void kvmppc_watchdog_func(unsigned long data)
^~~~~~~~~~~~~~~~~~~~
>> arch/powerpc/kvm/booke.c:985:5: error: no previous declaration for 'kvmppc_handle_exit' [-Werror=missing-declarations]
int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
^~~~~~~~~~~~~~~~~~
>> arch/powerpc/kvm/booke.c:1921:6: error: no previous declaration for 'kvm_guest_protect_msr' [-Werror=missing-declarations]
void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set)
^~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
--
In file included from include/linux/hugetlb.h:444:0,
from arch/powerpc/kvm/e500_mmu.c:31:
arch/powerpc/include/asm/hugetlb.h: In function 'huge_ptep_clear_flush':
arch/powerpc/include/asm/hugetlb.h:167:8: error: variable 'pte' set but not used [-Werror=unused-but-set-variable]
pte_t pte;
^~~
arch/powerpc/kvm/e500_mmu.c: At top level:
>> arch/powerpc/kvm/e500_mmu.c:539:6: error: no previous declaration for 'kvmppc_mmu_destroy_e500' [-Werror=missing-declarations]
void kvmppc_mmu_destroy_e500(struct kvm_vcpu *vcpu)
^~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
--
arch/powerpc/kvm/mpic.c: In function 'kvmppc_mpic_connect_vcpu':
>> arch/powerpc/kvm/mpic.c:1743:10: error: comparison of unsigned expression < 0 is always false [-Werror=type-limits]
if (cpu < 0 || cpu >= MAX_CPU)
^
cc1: all warnings being treated as errors


vim +/DebugException +1658 arch/powerpc/kernel/traps.c

14cf11af6cf608 Paul Mackerras 2005-09-26 1657
03465f899bdac7 Nicholas Piggin 2016-09-16 @1658 void DebugException(struct pt_regs *regs, unsigned long debug_status)
14cf11af6cf608 Paul Mackerras 2005-09-26 1659 {
51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1660 current->thread.debug.dbsr = debug_status;
3bffb6529cf10d Dave Kleikamp 2010-02-08 1661
ec097c84dff175 Roland McGrath 2009-05-28 1662 /* Hack alert: On BookE, Branch Taken stops on the branch itself, while
ec097c84dff175 Roland McGrath 2009-05-28 1663 * on server, it stops on the target of the branch. In order to simulate
ec097c84dff175 Roland McGrath 2009-05-28 1664 * the server behaviour, we thus restart right away with a single step
ec097c84dff175 Roland McGrath 2009-05-28 1665 * instead of stopping here when hitting a BT
ec097c84dff175 Roland McGrath 2009-05-28 1666 */
ec097c84dff175 Roland McGrath 2009-05-28 1667 if (debug_status & DBSR_BT) {
ec097c84dff175 Roland McGrath 2009-05-28 1668 regs->msr &= ~MSR_DE;
ec097c84dff175 Roland McGrath 2009-05-28 1669
ec097c84dff175 Roland McGrath 2009-05-28 1670 /* Disable BT */
ec097c84dff175 Roland McGrath 2009-05-28 1671 mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~DBCR0_BT);
ec097c84dff175 Roland McGrath 2009-05-28 1672 /* Clear the BT event */
ec097c84dff175 Roland McGrath 2009-05-28 1673 mtspr(SPRN_DBSR, DBSR_BT);
ec097c84dff175 Roland McGrath 2009-05-28 1674
ec097c84dff175 Roland McGrath 2009-05-28 1675 /* Do the single step trick only when coming from userspace */
ec097c84dff175 Roland McGrath 2009-05-28 1676 if (user_mode(regs)) {
51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1677 current->thread.debug.dbcr0 &= ~DBCR0_BT;
51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1678 current->thread.debug.dbcr0 |= DBCR0_IDM | DBCR0_IC;
ec097c84dff175 Roland McGrath 2009-05-28 1679 regs->msr |= MSR_DE;
ec097c84dff175 Roland McGrath 2009-05-28 1680 return;
ec097c84dff175 Roland McGrath 2009-05-28 1681 }
ec097c84dff175 Roland McGrath 2009-05-28 1682
6cc89bad60a673 Naveen N. Rao 2016-11-21 1683 if (kprobe_post_handler(regs))
6cc89bad60a673 Naveen N. Rao 2016-11-21 1684 return;
6cc89bad60a673 Naveen N. Rao 2016-11-21 1685
ec097c84dff175 Roland McGrath 2009-05-28 1686 if (notify_die(DIE_SSTEP, "block_step", regs, 5,
ec097c84dff175 Roland McGrath 2009-05-28 1687 5, SIGTRAP) == NOTIFY_STOP) {
ec097c84dff175 Roland McGrath 2009-05-28 1688 return;
ec097c84dff175 Roland McGrath 2009-05-28 1689 }
ec097c84dff175 Roland McGrath 2009-05-28 1690 if (debugger_sstep(regs))
ec097c84dff175 Roland McGrath 2009-05-28 1691 return;
ec097c84dff175 Roland McGrath 2009-05-28 1692 } else if (debug_status & DBSR_IC) { /* Instruction complete */
14cf11af6cf608 Paul Mackerras 2005-09-26 1693 regs->msr &= ~MSR_DE;
f82796214a95b1 Kumar Gala 2008-06-26 1694
14cf11af6cf608 Paul Mackerras 2005-09-26 1695 /* Disable instruction completion */
14cf11af6cf608 Paul Mackerras 2005-09-26 1696 mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~DBCR0_IC);
14cf11af6cf608 Paul Mackerras 2005-09-26 1697 /* Clear the instruction completion event */
14cf11af6cf608 Paul Mackerras 2005-09-26 1698 mtspr(SPRN_DBSR, DBSR_IC);
f82796214a95b1 Kumar Gala 2008-06-26 1699
6cc89bad60a673 Naveen N. Rao 2016-11-21 1700 if (kprobe_post_handler(regs))
6cc89bad60a673 Naveen N. Rao 2016-11-21 1701 return;
6cc89bad60a673 Naveen N. Rao 2016-11-21 1702
f82796214a95b1 Kumar Gala 2008-06-26 1703 if (notify_die(DIE_SSTEP, "single_step", regs, 5,
f82796214a95b1 Kumar Gala 2008-06-26 1704 5, SIGTRAP) == NOTIFY_STOP) {
f82796214a95b1 Kumar Gala 2008-06-26 1705 return;
f82796214a95b1 Kumar Gala 2008-06-26 1706 }
f82796214a95b1 Kumar Gala 2008-06-26 1707
14cf11af6cf608 Paul Mackerras 2005-09-26 1708 if (debugger_sstep(regs))
14cf11af6cf608 Paul Mackerras 2005-09-26 1709 return;
f82796214a95b1 Kumar Gala 2008-06-26 1710
d6a61bfc06d6f2 Luis Machado 2008-07-24 1711 if (user_mode(regs)) {
51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1712 current->thread.debug.dbcr0 &= ~DBCR0_IC;
51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1713 if (DBCR_ACTIVE_EVENTS(current->thread.debug.dbcr0,
51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1714 current->thread.debug.dbcr1))
3bffb6529cf10d Dave Kleikamp 2010-02-08 1715 regs->msr |= MSR_DE;
3bffb6529cf10d Dave Kleikamp 2010-02-08 1716 else
3bffb6529cf10d Dave Kleikamp 2010-02-08 1717 /* Make sure the IDM bit is off */
51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1718 current->thread.debug.dbcr0 &= ~DBCR0_IDM;
14cf11af6cf608 Paul Mackerras 2005-09-26 1719 }
3bffb6529cf10d Dave Kleikamp 2010-02-08 1720
3bffb6529cf10d Dave Kleikamp 2010-02-08 1721 _exception(SIGTRAP, regs, TRAP_TRACE, regs->nip);
3bffb6529cf10d Dave Kleikamp 2010-02-08 1722 } else
3bffb6529cf10d Dave Kleikamp 2010-02-08 1723 handle_debug(regs, debug_status);
14cf11af6cf608 Paul Mackerras 2005-09-26 1724 }
03465f899bdac7 Nicholas Piggin 2016-09-16 1725 NOKPROBE_SYMBOL(DebugException);
172ae2e7f8ff90 Dave Kleikamp 2010-02-08 1726 #endif /* CONFIG_PPC_ADV_DEBUG_REGS */
14cf11af6cf608 Paul Mackerras 2005-09-26 1727
14cf11af6cf608 Paul Mackerras 2005-09-26 1728 #if !defined(CONFIG_TAU_INT)
14cf11af6cf608 Paul Mackerras 2005-09-26 1729 void TAUException(struct pt_regs *regs)
14cf11af6cf608 Paul Mackerras 2005-09-26 1730 {
14cf11af6cf608 Paul Mackerras 2005-09-26 1731 printk("TAU trap at PC: %lx, MSR: %lx, vector=%lx %s\n",
14cf11af6cf608 Paul Mackerras 2005-09-26 1732 regs->nip, regs->msr, regs->trap, print_tainted());
14cf11af6cf608 Paul Mackerras 2005-09-26 1733 }
14cf11af6cf608 Paul Mackerras 2005-09-26 1734 #endif /* CONFIG_INT_TAU */
14cf11af6cf608 Paul Mackerras 2005-09-26 1735
14cf11af6cf608 Paul Mackerras 2005-09-26 1736 #ifdef CONFIG_ALTIVEC
dc1c1ca3dcd94c Stephen Rothwell 2005-10-01 1737 void altivec_assist_exception(struct pt_regs *regs)
14cf11af6cf608 Paul Mackerras 2005-09-26 1738 {
14cf11af6cf608 Paul Mackerras 2005-09-26 1739 int err;
14cf11af6cf608 Paul Mackerras 2005-09-26 1740
14cf11af6cf608 Paul Mackerras 2005-09-26 1741 if (!user_mode(regs)) {
14cf11af6cf608 Paul Mackerras 2005-09-26 1742 printk(KERN_EMERG "VMX/Altivec assist exception in kernel mode"
14cf11af6cf608 Paul Mackerras 2005-09-26 1743 " at %lx\n", regs->nip);
8dad3f9257414f Paul Mackerras 2005-10-06 1744 die("Kernel VMX/Altivec assist exception", regs, SIGILL);
14cf11af6cf608 Paul Mackerras 2005-09-26 1745 }
14cf11af6cf608 Paul Mackerras 2005-09-26 1746
dc1c1ca3dcd94c Stephen Rothwell 2005-10-01 1747 flush_altivec_to_thread(current);
dc1c1ca3dcd94c Stephen Rothwell 2005-10-01 1748
eecff81d1fcda2 Anton Blanchard 2009-10-27 1749 PPC_WARN_EMULATED(altivec, regs);
14cf11af6cf608 Paul Mackerras 2005-09-26 1750 err = emulate_altivec(regs);
14cf11af6cf608 Paul Mackerras 2005-09-26 1751 if (err == 0) {
14cf11af6cf608 Paul Mackerras 2005-09-26 1752 regs->nip += 4; /* skip emulated instruction */
14cf11af6cf608 Paul Mackerras 2005-09-26 1753 emulate_single_step(regs);
14cf11af6cf608 Paul Mackerras 2005-09-26 1754 return;
14cf11af6cf608 Paul Mackerras 2005-09-26 1755 }
14cf11af6cf608 Paul Mackerras 2005-09-26 1756
14cf11af6cf608 Paul Mackerras 2005-09-26 1757 if (err == -EFAULT) {
14cf11af6cf608 Paul Mackerras 2005-09-26 1758 /* got an error reading the instruction */
14cf11af6cf608 Paul Mackerras 2005-09-26 1759 _exception(SIGSEGV, regs, SEGV_ACCERR, regs->nip);
14cf11af6cf608 Paul Mackerras 2005-09-26 1760 } else {
14cf11af6cf608 Paul Mackerras 2005-09-26 1761 /* didn't recognize the instruction */
14cf11af6cf608 Paul Mackerras 2005-09-26 1762 /* XXX quick hack for now: set the non-Java bit in the VSCR */
76462232c21dc0 Christian Dietrich 2011-06-04 1763 printk_ratelimited(KERN_ERR "Unrecognized altivec instruction "
14cf11af6cf608 Paul Mackerras 2005-09-26 1764 "in %s at %lx\n", current->comm, regs->nip);
de79f7b9f6f92e Paul Mackerras 2013-09-10 1765 current->thread.vr_state.vscr.u[3] |= 0x10000;
14cf11af6cf608 Paul Mackerras 2005-09-26 1766 }
14cf11af6cf608 Paul Mackerras 2005-09-26 1767 }
14cf11af6cf608 Paul Mackerras 2005-09-26 1768 #endif /* CONFIG_ALTIVEC */
14cf11af6cf608 Paul Mackerras 2005-09-26 1769
14cf11af6cf608 Paul Mackerras 2005-09-26 1770 #ifdef CONFIG_FSL_BOOKE
14cf11af6cf608 Paul Mackerras 2005-09-26 @1771 void CacheLockingException(struct pt_regs *regs, unsigned long address,
14cf11af6cf608 Paul Mackerras 2005-09-26 1772 unsigned long error_code)
14cf11af6cf608 Paul Mackerras 2005-09-26 1773 {
14cf11af6cf608 Paul Mackerras 2005-09-26 1774 /* We treat cache locking instructions from the user
14cf11af6cf608 Paul Mackerras 2005-09-26 1775 * as priv ops, in the future we could try to do
14cf11af6cf608 Paul Mackerras 2005-09-26 1776 * something smarter
14cf11af6cf608 Paul Mackerras 2005-09-26 1777 */
14cf11af6cf608 Paul Mackerras 2005-09-26 1778 if (error_code & (ESR_DLK|ESR_ILK))
14cf11af6cf608 Paul Mackerras 2005-09-26 1779 _exception(SIGILL, regs, ILL_PRVOPC, regs->nip);
14cf11af6cf608 Paul Mackerras 2005-09-26 1780 return;
14cf11af6cf608 Paul Mackerras 2005-09-26 1781 }
14cf11af6cf608 Paul Mackerras 2005-09-26 1782 #endif /* CONFIG_FSL_BOOKE */
14cf11af6cf608 Paul Mackerras 2005-09-26 1783
14cf11af6cf608 Paul Mackerras 2005-09-26 1784 #ifdef CONFIG_SPE
14cf11af6cf608 Paul Mackerras 2005-09-26 1785 void SPEFloatingPointException(struct pt_regs *regs)
14cf11af6cf608 Paul Mackerras 2005-09-26 1786 {
6a800f36acd5bf Liu Yu 2008-10-28 1787 extern int do_spe_mathemu(struct pt_regs *regs);
14cf11af6cf608 Paul Mackerras 2005-09-26 1788 unsigned long spefscr;
14cf11af6cf608 Paul Mackerras 2005-09-26 1789 int fpexc_mode;
14cf11af6cf608 Paul Mackerras 2005-09-26 1790 int code = 0;
6a800f36acd5bf Liu Yu 2008-10-28 1791 int err;
6a800f36acd5bf Liu Yu 2008-10-28 1792
685659ee70db0b yu liu 2011-06-14 1793 flush_spe_to_thread(current);
14cf11af6cf608 Paul Mackerras 2005-09-26 1794
14cf11af6cf608 Paul Mackerras 2005-09-26 1795 spefscr = current->thread.spefscr;
14cf11af6cf608 Paul Mackerras 2005-09-26 1796 fpexc_mode = current->thread.fpexc_mode;
14cf11af6cf608 Paul Mackerras 2005-09-26 1797
14cf11af6cf608 Paul Mackerras 2005-09-26 1798 if ((spefscr & SPEFSCR_FOVF) && (fpexc_mode & PR_FP_EXC_OVF)) {
14cf11af6cf608 Paul Mackerras 2005-09-26 1799 code = FPE_FLTOVF;
14cf11af6cf608 Paul Mackerras 2005-09-26 1800 }
14cf11af6cf608 Paul Mackerras 2005-09-26 1801 else if ((spefscr & SPEFSCR_FUNF) && (fpexc_mode & PR_FP_EXC_UND)) {
14cf11af6cf608 Paul Mackerras 2005-09-26 1802 code = FPE_FLTUND;
14cf11af6cf608 Paul Mackerras 2005-09-26 1803 }
14cf11af6cf608 Paul Mackerras 2005-09-26 1804 else if ((spefscr & SPEFSCR_FDBZ) && (fpexc_mode & PR_FP_EXC_DIV))
14cf11af6cf608 Paul Mackerras 2005-09-26 1805 code = FPE_FLTDIV;
14cf11af6cf608 Paul Mackerras 2005-09-26 1806 else if ((spefscr & SPEFSCR_FINV) && (fpexc_mode & PR_FP_EXC_INV)) {
14cf11af6cf608 Paul Mackerras 2005-09-26 1807 code = FPE_FLTINV;
14cf11af6cf608 Paul Mackerras 2005-09-26 1808 }
14cf11af6cf608 Paul Mackerras 2005-09-26 1809 else if ((spefscr & (SPEFSCR_FG | SPEFSCR_FX)) && (fpexc_mode & PR_FP_EXC_RES))
14cf11af6cf608 Paul Mackerras 2005-09-26 1810 code = FPE_FLTRES;
14cf11af6cf608 Paul Mackerras 2005-09-26 1811
6a800f36acd5bf Liu Yu 2008-10-28 1812 err = do_spe_mathemu(regs);
6a800f36acd5bf Liu Yu 2008-10-28 1813 if (err == 0) {
6a800f36acd5bf Liu Yu 2008-10-28 1814 regs->nip += 4; /* skip emulated instruction */
6a800f36acd5bf Liu Yu 2008-10-28 1815 emulate_single_step(regs);
6a800f36acd5bf Liu Yu 2008-10-28 1816 return;
6a800f36acd5bf Liu Yu 2008-10-28 1817 }
14cf11af6cf608 Paul Mackerras 2005-09-26 1818
6a800f36acd5bf Liu Yu 2008-10-28 1819 if (err == -EFAULT) {
6a800f36acd5bf Liu Yu 2008-10-28 1820 /* got an error reading the instruction */
6a800f36acd5bf Liu Yu 2008-10-28 1821 _exception(SIGSEGV, regs, SEGV_ACCERR, regs->nip);
6a800f36acd5bf Liu Yu 2008-10-28 1822 } else if (err == -EINVAL) {
6a800f36acd5bf Liu Yu 2008-10-28 1823 /* didn't recognize the instruction */
6a800f36acd5bf Liu Yu 2008-10-28 1824 printk(KERN_ERR "unrecognized spe instruction "
6a800f36acd5bf Liu Yu 2008-10-28 1825 "in %s at %lx\n", current->comm, regs->nip);
6a800f36acd5bf Liu Yu 2008-10-28 1826 } else {
14cf11af6cf608 Paul Mackerras 2005-09-26 1827 _exception(SIGFPE, regs, code, regs->nip);
6a800f36acd5bf Liu Yu 2008-10-28 1828 }
6a800f36acd5bf Liu Yu 2008-10-28 1829
14cf11af6cf608 Paul Mackerras 2005-09-26 1830 return;
14cf11af6cf608 Paul Mackerras 2005-09-26 1831 }
6a800f36acd5bf Liu Yu 2008-10-28 1832
6a800f36acd5bf Liu Yu 2008-10-28 @1833 void SPEFloatingPointRoundException(struct pt_regs *regs)
6a800f36acd5bf Liu Yu 2008-10-28 1834 {
6a800f36acd5bf Liu Yu 2008-10-28 1835 extern int speround_handler(struct pt_regs *regs);
6a800f36acd5bf Liu Yu 2008-10-28 1836 int err;
6a800f36acd5bf Liu Yu 2008-10-28 1837
6a800f36acd5bf Liu Yu 2008-10-28 1838 preempt_disable();
6a800f36acd5bf Liu Yu 2008-10-28 1839 if (regs->msr & MSR_SPE)
6a800f36acd5bf Liu Yu 2008-10-28 1840 giveup_spe(current);
6a800f36acd5bf Liu Yu 2008-10-28 1841 preempt_enable();
6a800f36acd5bf Liu Yu 2008-10-28 1842
6a800f36acd5bf Liu Yu 2008-10-28 1843 regs->nip -= 4;
6a800f36acd5bf Liu Yu 2008-10-28 1844 err = speround_handler(regs);
6a800f36acd5bf Liu Yu 2008-10-28 1845 if (err == 0) {
6a800f36acd5bf Liu Yu 2008-10-28 1846 regs->nip += 4; /* skip emulated instruction */
6a800f36acd5bf Liu Yu 2008-10-28 1847 emulate_single_step(regs);
6a800f36acd5bf Liu Yu 2008-10-28 1848 return;
6a800f36acd5bf Liu Yu 2008-10-28 1849 }
6a800f36acd5bf Liu Yu 2008-10-28 1850
6a800f36acd5bf Liu Yu 2008-10-28 1851 if (err == -EFAULT) {
6a800f36acd5bf Liu Yu 2008-10-28 1852 /* got an error reading the instruction */
6a800f36acd5bf Liu Yu 2008-10-28 1853 _exception(SIGSEGV, regs, SEGV_ACCERR, regs->nip);
6a800f36acd5bf Liu Yu 2008-10-28 1854 } else if (err == -EINVAL) {
6a800f36acd5bf Liu Yu 2008-10-28 1855 /* didn't recognize the instruction */
6a800f36acd5bf Liu Yu 2008-10-28 1856 printk(KERN_ERR "unrecognized spe instruction "
6a800f36acd5bf Liu Yu 2008-10-28 1857 "in %s at %lx\n", current->comm, regs->nip);
6a800f36acd5bf Liu Yu 2008-10-28 1858 } else {
6a800f36acd5bf Liu Yu 2008-10-28 1859 _exception(SIGFPE, regs, 0, regs->nip);
6a800f36acd5bf Liu Yu 2008-10-28 1860 return;
6a800f36acd5bf Liu Yu 2008-10-28 1861 }
6a800f36acd5bf Liu Yu 2008-10-28 1862 }
14cf11af6cf608 Paul Mackerras 2005-09-26 1863 #endif
dc1c1ca3dcd94c Stephen Rothwell 2005-10-01 1864

:::::: The code at line 1658 was first introduced by commit
:::::: 03465f899bdac70d34f6ca447a74d8ae9e284ce5 powerpc: Use kprobe blacklist for exception handlers

:::::: TO: Nicholas Piggin <npiggin@gmail.com>
:::::: CC: Michael Ellerman <mpe@ellerman.id.au>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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