diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/kernel/calls.S | 8 | ||||
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 49 | ||||
| -rw-r--r-- | arch/arm/kernel/entry-common.S | 20 | ||||
| -rw-r--r-- | arch/arm/kernel/module.c | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/ptrace.c | 9 | ||||
| -rw-r--r-- | arch/arm/mach-pxa/pm.c | 9 |
6 files changed, 71 insertions, 26 deletions
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S index 2ad4aa2a153..55076a75e5b 100644 --- a/arch/arm/kernel/calls.S +++ b/arch/arm/kernel/calls.S @@ -131,7 +131,7 @@ __syscall_start: .long sys_wait4 /* 115 */ .long sys_swapoff .long sys_sysinfo - .long sys_ipc_wrapper + .long sys_ipc .long sys_fsync .long sys_sigreturn_wrapper /* 120 */ .long sys_clone_wrapper @@ -254,7 +254,7 @@ __syscall_start: .long sys_fremovexattr .long sys_tkill .long sys_sendfile64 -/* 240 */ .long sys_futex_wrapper +/* 240 */ .long sys_futex .long sys_sched_setaffinity .long sys_sched_getaffinity .long sys_io_setup @@ -284,7 +284,7 @@ __syscall_start: .long sys_fstatfs64 .long sys_tgkill .long sys_utimes -/* 270 */ .long sys_arm_fadvise64_64_wrapper +/* 270 */ .long sys_arm_fadvise64_64 .long sys_pciconfig_iobase .long sys_pciconfig_read .long sys_pciconfig_write @@ -333,7 +333,7 @@ __syscall_start: .long sys_inotify_init .long sys_inotify_add_watch .long sys_inotify_rm_watch - .long sys_mbind_wrapper + .long sys_mbind /* 320 */ .long sys_get_mempolicy .long sys_set_mempolicy __syscall_end: diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index d9fb819bf7c..2a8d27e18fa 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -614,6 +614,47 @@ __kuser_helper_start: /* * Reference prototype: * + * void __kernel_memory_barrier(void) + * + * Input: + * + * lr = return address + * + * Output: + * + * none + * + * Clobbered: + * + * the Z flag might be lost + * + * Definition and user space usage example: + * + * typedef void (__kernel_dmb_t)(void); + * #define __kernel_dmb (*(__kernel_dmb_t *)0xffff0fa0) + * + * Apply any needed memory barrier to preserve consistency with data modified + * manually and __kuser_cmpxchg usage. + * + * This could be used as follows: + * + * #define __kernel_dmb() \ + * asm volatile ( "mov r0, #0xffff0fff; mov lr, pc; sub pc, r0, #95" \ + * : : : "lr","cc" ) + */ + +__kuser_memory_barrier: @ 0xffff0fa0 + +#if __LINUX_ARM_ARCH__ >= 6 && defined(CONFIG_SMP) + mcr p15, 0, r0, c7, c10, 5 @ dmb +#endif + mov pc, lr + + .align 5 + +/* + * Reference prototype: + * * int __kernel_cmpxchg(int oldval, int newval, int *ptr) * * Input: @@ -642,6 +683,8 @@ __kuser_helper_start: * The C flag is also set if *ptr was changed to allow for assembly * optimization in the calling code. * + * Note: this routine already includes memory barriers as needed. + * * For example, a user space atomic_add implementation could look like this: * * #define atomic_add(ptr, val) \ @@ -698,10 +741,16 @@ __kuser_cmpxchg: @ 0xffff0fc0 #else +#ifdef CONFIG_SMP + mcr p15, 0, r0, c7, c10, 5 @ dmb +#endif ldrex r3, [r2] subs r3, r3, r0 strexeq r3, r1, [r2] rsbs r0, r3, #0 +#ifdef CONFIG_SMP + mcr p15, 0, r0, c7, c10, 5 @ dmb +#endif mov pc, lr #endif diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index f7f18307523..e2b42997ad3 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -145,7 +145,7 @@ ENTRY(vector_swi) #endif enable_irq - str r4, [sp, #-S_OFF]! @ push fifth arg + stmdb sp!, {r4, r5} @ push fifth and sixth args get_thread_info tsk ldr ip, [tsk, #TI_FLAGS] @ check for syscall tracing @@ -204,7 +204,7 @@ ENTRY(sys_call_table) * Special system call wrappers */ @ r0 = syscall number -@ r5 = syscall table +@ r8 = syscall table .type sys_syscall, #function sys_syscall: eor scno, r0, #__NR_SYSCALL_BASE @@ -255,22 +255,6 @@ sys_sigaltstack_wrapper: ldr r2, [sp, #S_OFF + S_SP] b do_sigaltstack -sys_futex_wrapper: - str r5, [sp, #4] @ push sixth arg - b sys_futex - -sys_arm_fadvise64_64_wrapper: - str r5, [sp, #4] @ push r5 to stack - b sys_arm_fadvise64_64 - -sys_mbind_wrapper: - str r5, [sp, #4] - b sys_mbind - -sys_ipc_wrapper: - str r5, [sp, #4] @ push sixth arg - b sys_ipc - /* * Note: off_4k (r5) is always units of 4K. If we can't do the requested * offset, we return EINVAL. diff --git a/arch/arm/kernel/module.c b/arch/arm/kernel/module.c index 6055e1427ba..055bf5d2889 100644 --- a/arch/arm/kernel/module.c +++ b/arch/arm/kernel/module.c @@ -101,6 +101,8 @@ apply_relocate(Elf32_Shdr *sechdrs, const char *strtab, unsigned int symindex, break; case R_ARM_PC24: + case R_ARM_CALL: + case R_ARM_JUMP24: offset = (*(u32 *)loc & 0x00ffffff) << 2; if (offset & 0x02000000) offset -= 0x04000000; diff --git a/arch/arm/kernel/ptrace.c b/arch/arm/kernel/ptrace.c index 9a340e790da..2b84f78d7b0 100644 --- a/arch/arm/kernel/ptrace.c +++ b/arch/arm/kernel/ptrace.c @@ -242,6 +242,15 @@ get_branch_address(struct task_struct *child, unsigned long pc, unsigned long in */ long aluop1, aluop2, ccbit; + if ((insn & 0x0fffffd0) == 0x012fff10) { + /* + * bx or blx + */ + alt = get_user_reg(child, insn & 15); + break; + } + + if ((insn & 0xf000) != 0xf000) break; diff --git a/arch/arm/mach-pxa/pm.c b/arch/arm/mach-pxa/pm.c index f74b9af112d..852ea72d8c8 100644 --- a/arch/arm/mach-pxa/pm.c +++ b/arch/arm/mach-pxa/pm.c @@ -155,19 +155,20 @@ int pxa_pm_enter(suspend_state_t state) PSPR = 0; /* restore registers */ + RESTORE_GPLEVEL(0); RESTORE_GPLEVEL(1); RESTORE_GPLEVEL(2); + RESTORE(GPDR0); RESTORE(GPDR1); RESTORE(GPDR2); RESTORE(GAFR0_L); RESTORE(GAFR0_U); RESTORE(GAFR1_L); RESTORE(GAFR1_U); RESTORE(GAFR2_L); RESTORE(GAFR2_U); - RESTORE_GPLEVEL(0); RESTORE_GPLEVEL(1); RESTORE_GPLEVEL(2); - RESTORE(GPDR0); RESTORE(GPDR1); RESTORE(GPDR2); RESTORE(GRER0); RESTORE(GRER1); RESTORE(GRER2); RESTORE(GFER0); RESTORE(GFER1); RESTORE(GFER2); RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2); #ifdef CONFIG_PXA27x RESTORE(MDREFR); - RESTORE(GAFR3_L); RESTORE(GAFR3_U); RESTORE_GPLEVEL(3); - RESTORE(GPDR3); RESTORE(GRER3); RESTORE(GFER3); RESTORE(PGSR3); + RESTORE_GPLEVEL(3); RESTORE(GPDR3); + RESTORE(GAFR3_L); RESTORE(GAFR3_U); + RESTORE(GRER3); RESTORE(GFER3); RESTORE(PGSR3); RESTORE(PWER); RESTORE(PCFR); RESTORE(PRER); RESTORE(PFER); RESTORE(PKWR); #endif |