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-rw-r--r--arch/frv/kernel/Makefile2
-rw-r--r--arch/frv/kernel/break.S77
-rw-r--r--arch/frv/kernel/entry-table.S39
-rw-r--r--arch/frv/kernel/entry.S93
-rw-r--r--arch/frv/kernel/frv_ksyms.c27
-rw-r--r--arch/frv/kernel/futex.c242
-rw-r--r--arch/frv/kernel/head.S3
-rw-r--r--arch/frv/kernel/irq.c58
-rw-r--r--arch/frv/kernel/module.c80
-rw-r--r--arch/frv/kernel/pm.c2
-rw-r--r--arch/frv/kernel/process.c26
-rw-r--r--arch/frv/kernel/setup.c2
-rw-r--r--arch/frv/kernel/signal.c239
-rw-r--r--arch/frv/kernel/time.c3
-rw-r--r--arch/frv/kernel/traps.c3
-rw-r--r--arch/frv/kernel/uaccess.c7
-rw-r--r--arch/frv/kernel/vmlinux.lds.S1
17 files changed, 683 insertions, 221 deletions
diff --git a/arch/frv/kernel/Makefile b/arch/frv/kernel/Makefile
index 981c2c7..5a827b3 100644
--- a/arch/frv/kernel/Makefile
+++ b/arch/frv/kernel/Makefile
@@ -20,3 +20,5 @@ obj-$(CONFIG_FUJITSU_MB93493) += irq-mb93493.o
obj-$(CONFIG_PM) += pm.o cmode.o
obj-$(CONFIG_MB93093_PDK) += pm-mb93093.o
obj-$(CONFIG_SYSCTL) += sysctl.o
+obj-$(CONFIG_FUTEX) += futex.o
+obj-$(CONFIG_MODULES) += module.o
diff --git a/arch/frv/kernel/break.S b/arch/frv/kernel/break.S
index 33233dc..687c48d 100644
--- a/arch/frv/kernel/break.S
+++ b/arch/frv/kernel/break.S
@@ -200,12 +200,20 @@ __break_step:
movsg bpcsr,gr2
sethi.p %hi(__entry_kernel_external_interrupt),gr3
setlo %lo(__entry_kernel_external_interrupt),gr3
- subcc gr2,gr3,gr0,icc0
+ subcc.p gr2,gr3,gr0,icc0
+ sethi %hi(__entry_uspace_external_interrupt),gr3
+ setlo.p %lo(__entry_uspace_external_interrupt),gr3
beq icc0,#2,__break_step_kernel_external_interrupt
- sethi.p %hi(__entry_uspace_external_interrupt),gr3
- setlo %lo(__entry_uspace_external_interrupt),gr3
- subcc gr2,gr3,gr0,icc0
+ subcc.p gr2,gr3,gr0,icc0
+ sethi %hi(__entry_kernel_external_interrupt_virtually_disabled),gr3
+ setlo.p %lo(__entry_kernel_external_interrupt_virtually_disabled),gr3
beq icc0,#2,__break_step_uspace_external_interrupt
+ subcc.p gr2,gr3,gr0,icc0
+ sethi %hi(__entry_kernel_external_interrupt_virtual_reenable),gr3
+ setlo.p %lo(__entry_kernel_external_interrupt_virtual_reenable),gr3
+ beq icc0,#2,__break_step_kernel_external_interrupt_virtually_disabled
+ subcc gr2,gr3,gr0,icc0
+ beq icc0,#2,__break_step_kernel_external_interrupt_virtual_reenable
LEDS 0x2007,gr2
@@ -254,6 +262,9 @@ __break_step_kernel_softprog_interrupt:
# step through an external interrupt from kernel mode
.globl __break_step_kernel_external_interrupt
__break_step_kernel_external_interrupt:
+ # deal with virtual interrupt disablement
+ beq icc2,#0,__break_step_kernel_external_interrupt_virtually_disabled
+
sethi.p %hi(__entry_kernel_external_interrupt_reentry),gr3
setlo %lo(__entry_kernel_external_interrupt_reentry),gr3
@@ -294,6 +305,64 @@ __break_return_as_kernel_prologue:
#endif
rett #1
+# we single-stepped into an interrupt handler whilst interrupts were merely virtually disabled
+# need to really disable interrupts, set flag, fix up and return
+__break_step_kernel_external_interrupt_virtually_disabled:
+ movsg psr,gr2
+ andi gr2,#~PSR_PIL,gr2
+ ori gr2,#PSR_PIL_14,gr2 /* debugging interrupts only */
+ movgs gr2,psr
+
+ ldi @(gr31,#REG_CCR),gr3
+ movgs gr3,ccr
+ subcc.p gr0,gr0,gr0,icc2 /* leave Z set, clear C */
+
+ # exceptions must've been enabled and we must've been in supervisor mode
+ setlos BPSR_BET|BPSR_BS,gr3
+ movgs gr3,bpsr
+
+ # return to where the interrupt happened
+ movsg pcsr,gr2
+ movgs gr2,bpcsr
+
+ lddi.p @(gr31,#REG_GR(2)),gr2
+
+ xor gr31,gr31,gr31
+ movgs gr0,brr
+#ifdef CONFIG_MMU
+ movsg scr3,gr31
+#endif
+ rett #1
+
+# we stepped through into the virtual interrupt reenablement trap
+#
+# we also want to single step anyway, but after fixing up so that we get an event on the
+# instruction after the broken-into exception returns
+ .globl __break_step_kernel_external_interrupt_virtual_reenable
+__break_step_kernel_external_interrupt_virtual_reenable:
+ movsg psr,gr2
+ andi gr2,#~PSR_PIL,gr2
+ movgs gr2,psr
+
+ ldi @(gr31,#REG_CCR),gr3
+ movgs gr3,ccr
+ subicc gr0,#1,gr0,icc2 /* clear Z, set C */
+
+ # save the adjusted ICC2
+ movsg ccr,gr3
+ sti gr3,@(gr31,#REG_CCR)
+
+ # exceptions must've been enabled and we must've been in supervisor mode
+ setlos BPSR_BET|BPSR_BS,gr3
+ movgs gr3,bpsr
+
+ # return to where the trap happened
+ movsg pcsr,gr2
+ movgs gr2,bpcsr
+
+ # and then process the single step
+ bra __break_continue
+
# step through an internal exception from uspace mode
.globl __break_step_uspace_softprog_interrupt
__break_step_uspace_softprog_interrupt:
diff --git a/arch/frv/kernel/entry-table.S b/arch/frv/kernel/entry-table.S
index 9b9243e..81568ac 100644
--- a/arch/frv/kernel/entry-table.S
+++ b/arch/frv/kernel/entry-table.S
@@ -116,6 +116,8 @@ __break_kerneltrap_fixup_table:
.long __break_step_uspace_external_interrupt
.section .trap.kernel
.org \tbr_tt
+ # deal with virtual interrupt disablement
+ beq icc2,#0,__entry_kernel_external_interrupt_virtually_disabled
bra __entry_kernel_external_interrupt
.section .trap.fixup.kernel
.org \tbr_tt >> 2
@@ -259,25 +261,52 @@ __trap_fixup_kernel_data_tlb_miss:
.org TBR_TT_TRAP0
.rept 127
bra __entry_uspace_softprog_interrupt
- bra __break_step_uspace_softprog_interrupt
- .long 0,0
+ .long 0,0,0
.endr
.org TBR_TT_BREAK
bra __entry_break
.long 0,0,0
+ .section .trap.fixup.user
+ .org TBR_TT_TRAP0 >> 2
+ .rept 127
+ .long __break_step_uspace_softprog_interrupt
+ .endr
+ .org TBR_TT_BREAK >> 2
+ .long 0
+
# miscellaneous kernel mode entry points
.section .trap.kernel
.org TBR_TT_TRAP0
- .rept 127
bra __entry_kernel_softprog_interrupt
- bra __break_step_kernel_softprog_interrupt
- .long 0,0
+ .org TBR_TT_TRAP1
+ bra __entry_kernel_softprog_interrupt
+
+ # trap #2 in kernel - reenable interrupts
+ .org TBR_TT_TRAP2
+ bra __entry_kernel_external_interrupt_virtual_reenable
+
+ # miscellaneous kernel traps
+ .org TBR_TT_TRAP3
+ .rept 124
+ bra __entry_kernel_softprog_interrupt
+ .long 0,0,0
.endr
.org TBR_TT_BREAK
bra __entry_break
.long 0,0,0
+ .section .trap.fixup.kernel
+ .org TBR_TT_TRAP0 >> 2
+ .long __break_step_kernel_softprog_interrupt
+ .long __break_step_kernel_softprog_interrupt
+ .long __break_step_kernel_external_interrupt_virtual_reenable
+ .rept 124
+ .long __break_step_kernel_softprog_interrupt
+ .endr
+ .org TBR_TT_BREAK >> 2
+ .long 0
+
# miscellaneous debug mode entry points
.section .trap.break
.org TBR_TT_BREAK
diff --git a/arch/frv/kernel/entry.S b/arch/frv/kernel/entry.S
index ad10ea5..1d21c8d 100644
--- a/arch/frv/kernel/entry.S
+++ b/arch/frv/kernel/entry.S
@@ -141,7 +141,10 @@ __entry_uspace_external_interrupt_reentry:
movsg gner0,gr4
movsg gner1,gr5
- stdi gr4,@(gr28,#REG_GNER0)
+ stdi.p gr4,@(gr28,#REG_GNER0)
+
+ # interrupts start off fully disabled in the interrupt handler
+ subcc gr0,gr0,gr0,icc2 /* set Z and clear C */
# set up kernel global registers
sethi.p %hi(__kernel_current_task),gr5
@@ -193,9 +196,8 @@ __entry_uspace_external_interrupt_reentry:
.type __entry_kernel_external_interrupt,@function
__entry_kernel_external_interrupt:
LEDS 0x6210
-
- sub sp,gr15,gr31
- LEDS32
+// sub sp,gr15,gr31
+// LEDS32
# set up the stack pointer
or.p sp,gr0,gr30
@@ -231,7 +233,10 @@ __entry_kernel_external_interrupt_reentry:
stdi gr24,@(gr28,#REG_GR(24))
stdi gr26,@(gr28,#REG_GR(26))
sti gr29,@(gr28,#REG_GR(29))
- stdi gr30,@(gr28,#REG_GR(30))
+ stdi.p gr30,@(gr28,#REG_GR(30))
+
+ # note virtual interrupts will be fully enabled upon return
+ subicc gr0,#1,gr0,icc2 /* clear Z, set C */
movsg tbr ,gr20
movsg psr ,gr22
@@ -267,7 +272,10 @@ __entry_kernel_external_interrupt_reentry:
movsg gner0,gr4
movsg gner1,gr5
- stdi gr4,@(gr28,#REG_GNER0)
+ stdi.p gr4,@(gr28,#REG_GNER0)
+
+ # interrupts start off fully disabled in the interrupt handler
+ subcc gr0,gr0,gr0,icc2 /* set Z and clear C */
# set the return address
sethi.p %hi(__entry_return_from_kernel_interrupt),gr4
@@ -291,6 +299,45 @@ __entry_kernel_external_interrupt_reentry:
.size __entry_kernel_external_interrupt,.-__entry_kernel_external_interrupt
+###############################################################################
+#
+# deal with interrupts that were actually virtually disabled
+# - we need to really disable them, flag the fact and return immediately
+# - if you change this, you must alter break.S also
+#
+###############################################################################
+ .balign L1_CACHE_BYTES
+ .globl __entry_kernel_external_interrupt_virtually_disabled
+ .type __entry_kernel_external_interrupt_virtually_disabled,@function
+__entry_kernel_external_interrupt_virtually_disabled:
+ movsg psr,gr30
+ andi gr30,#~PSR_PIL,gr30
+ ori gr30,#PSR_PIL_14,gr30 ; debugging interrupts only
+ movgs gr30,psr
+ subcc gr0,gr0,gr0,icc2 ; leave Z set, clear C
+ rett #0
+
+ .size __entry_kernel_external_interrupt_virtually_disabled,.-__entry_kernel_external_interrupt_virtually_disabled
+
+###############################################################################
+#
+# deal with re-enablement of interrupts that were pending when virtually re-enabled
+# - set ICC2.C, re-enable the real interrupts and return
+# - we can clear ICC2.Z because we shouldn't be here if it's not 0 [due to TIHI]
+# - if you change this, you must alter break.S also
+#
+###############################################################################
+ .balign L1_CACHE_BYTES
+ .globl __entry_kernel_external_interrupt_virtual_reenable
+ .type __entry_kernel_external_interrupt_virtual_reenable,@function
+__entry_kernel_external_interrupt_virtual_reenable:
+ movsg psr,gr30
+ andi gr30,#~PSR_PIL,gr30 ; re-enable interrupts
+ movgs gr30,psr
+ subicc gr0,#1,gr0,icc2 ; clear Z, set C
+ rett #0
+
+ .size __entry_kernel_external_interrupt_virtual_reenable,.-__entry_kernel_external_interrupt_virtual_reenable
###############################################################################
#
@@ -335,6 +382,7 @@ __entry_uspace_softprog_interrupt_reentry:
sethi.p %hi(__entry_return_from_user_exception),gr23
setlo %lo(__entry_return_from_user_exception),gr23
+
bra __entry_common
.size __entry_uspace_softprog_interrupt,.-__entry_uspace_softprog_interrupt
@@ -495,7 +543,10 @@ __entry_common:
movsg gner0,gr4
movsg gner1,gr5
- stdi gr4,@(gr28,#REG_GNER0)
+ stdi.p gr4,@(gr28,#REG_GNER0)
+
+ # set up virtual interrupt disablement
+ subicc gr0,#1,gr0,icc2 /* clear Z flag, set C flag */
# set up kernel global registers
sethi.p %hi(__kernel_current_task),gr5
@@ -1076,7 +1127,7 @@ __entry_work_notifysig:
LEDS 0x6410
ori.p gr4,#0,gr8
call do_notify_resume
- bra __entry_return_direct
+ bra __entry_resume_userspace
# perform syscall entry tracing
__syscall_trace_entry:
@@ -1418,11 +1469,27 @@ sys_call_table:
.long sys_add_key
.long sys_request_key
.long sys_keyctl
- .long sys_ni_syscall // sys_vperfctr_open
- .long sys_ni_syscall // sys_vperfctr_control /* 290 */
- .long sys_ni_syscall // sys_vperfctr_unlink
- .long sys_ni_syscall // sys_vperfctr_iresume
- .long sys_ni_syscall // sys_vperfctr_read
+ .long sys_ioprio_set
+ .long sys_ioprio_get /* 290 */
+ .long sys_inotify_init
+ .long sys_inotify_add_watch
+ .long sys_inotify_rm_watch
+ .long sys_migrate_pages
+ .long sys_openat /* 295 */
+ .long sys_mkdirat
+ .long sys_mknodat
+ .long sys_fchownat
+ .long sys_futimesat
+ .long sys_newfstatat /* 300 */
+ .long sys_unlinkat
+ .long sys_renameat
+ .long sys_linkat
+ .long sys_symlinkat
+ .long sys_readlinkat /* 305 */
+ .long sys_fchmodat
+ .long sys_faccessat
+ .long sys_pselect6
+ .long sys_ppoll
syscall_table_size = (. - sys_call_table)
diff --git a/arch/frv/kernel/frv_ksyms.c b/arch/frv/kernel/frv_ksyms.c
index 1a76d52..0f1c6cb 100644
--- a/arch/frv/kernel/frv_ksyms.c
+++ b/arch/frv/kernel/frv_ksyms.c
@@ -16,17 +16,16 @@
#include <asm/semaphore.h>
#include <asm/checksum.h>
#include <asm/hardirq.h>
-#include <asm/current.h>
+#include <asm/cacheflush.h>
-extern void dump_thread(struct pt_regs *, struct user *);
extern long __memcpy_user(void *dst, const void *src, size_t count);
+extern long __memset_user(void *dst, const void *src, size_t count);
/* platform dependent support */
EXPORT_SYMBOL(__ioremap);
EXPORT_SYMBOL(iounmap);
-EXPORT_SYMBOL(dump_thread);
EXPORT_SYMBOL(strnlen);
EXPORT_SYMBOL(strrchr);
EXPORT_SYMBOL(strstr);
@@ -50,7 +49,11 @@ EXPORT_SYMBOL(disable_irq);
EXPORT_SYMBOL(__res_bus_clock_speed_HZ);
EXPORT_SYMBOL(__page_offset);
EXPORT_SYMBOL(__memcpy_user);
-EXPORT_SYMBOL(flush_dcache_page);
+EXPORT_SYMBOL(__memset_user);
+EXPORT_SYMBOL(frv_dcache_writeback);
+EXPORT_SYMBOL(frv_cache_invalidate);
+EXPORT_SYMBOL(frv_icache_invalidate);
+EXPORT_SYMBOL(frv_cache_wback_inv);
#ifndef CONFIG_MMU
EXPORT_SYMBOL(memory_start);
@@ -72,6 +75,9 @@ EXPORT_SYMBOL(memcmp);
EXPORT_SYMBOL(memscan);
EXPORT_SYMBOL(memmove);
+EXPORT_SYMBOL(__outsl_ns);
+EXPORT_SYMBOL(__insl_ns);
+
EXPORT_SYMBOL(get_wchan);
#ifdef CONFIG_FRV_OUTOFLINE_ATOMIC_OPS
@@ -80,14 +86,13 @@ EXPORT_SYMBOL(atomic_test_and_OR_mask);
EXPORT_SYMBOL(atomic_test_and_XOR_mask);
EXPORT_SYMBOL(atomic_add_return);
EXPORT_SYMBOL(atomic_sub_return);
-EXPORT_SYMBOL(__xchg_8);
-EXPORT_SYMBOL(__xchg_16);
EXPORT_SYMBOL(__xchg_32);
-EXPORT_SYMBOL(__cmpxchg_8);
-EXPORT_SYMBOL(__cmpxchg_16);
EXPORT_SYMBOL(__cmpxchg_32);
#endif
+EXPORT_SYMBOL(__debug_bug_printk);
+EXPORT_SYMBOL(__delay_loops_MHz);
+
/*
* libgcc functions - functions that are used internally by the
* compiler... (prototypes are not correct though, but that
@@ -101,6 +106,8 @@ extern void __divdi3(void);
extern void __lshrdi3(void);
extern void __moddi3(void);
extern void __muldi3(void);
+extern void __mulll(void);
+extern void __umulll(void);
extern void __negdi2(void);
extern void __ucmpdi2(void);
extern void __udivdi3(void);
@@ -116,8 +123,10 @@ EXPORT_SYMBOL(__ashrdi3);
EXPORT_SYMBOL(__lshrdi3);
//EXPORT_SYMBOL(__moddi3);
EXPORT_SYMBOL(__muldi3);
+EXPORT_SYMBOL(__mulll);
+EXPORT_SYMBOL(__umulll);
EXPORT_SYMBOL(__negdi2);
-//EXPORT_SYMBOL(__ucmpdi2);
+EXPORT_SYMBOL(__ucmpdi2);
//EXPORT_SYMBOL(__udivdi3);
//EXPORT_SYMBOL(__udivmoddi4);
//EXPORT_SYMBOL(__umoddi3);
diff --git a/arch/frv/kernel/futex.c b/arch/frv/kernel/futex.c
new file mode 100644
index 0000000..eae874a
--- /dev/null
+++ b/arch/frv/kernel/futex.c
@@ -0,0 +1,242 @@
+/* futex.c: futex operations
+ *
+ * Copyright (C) 2005 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/futex.h>
+#include <asm/futex.h>
+#include <asm/errno.h>
+#include <asm/uaccess.h>
+
+/*
+ * the various futex operations; MMU fault checking is ignored under no-MMU
+ * conditions
+ */
+static inline int atomic_futex_op_xchg_set(int oparg, int __user *uaddr, int *_oldval)
+{
+ int oldval, ret;
+
+ asm("0: \n"
+ " orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */
+ " ckeq icc3,cc7 \n"
+ "1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */
+ " orcr cc7,cc7,cc3 \n" /* set CC3 to true */
+ "2: cst.p %3,%M0 ,cc3,#1 \n"
+ " corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */
+ " beq icc3,#0,0b \n"
+ " setlos 0,%2 \n"
+ "3: \n"
+ ".subsection 2 \n"
+ "4: setlos %5,%2 \n"
+ " bra 3b \n"
+ ".previous \n"
+ ".section __ex_table,\"a\" \n"
+ " .balign 8 \n"
+ " .long 1b,4b \n"
+ " .long 2b,4b \n"
+ ".previous"
+ : "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg)
+ : "3"(oparg), "i"(-EFAULT)
+ : "memory", "cc7", "cc3", "icc3"
+ );
+
+ *_oldval = oldval;
+ return ret;
+}
+
+static inline int atomic_futex_op_xchg_add(int oparg, int __user *uaddr, int *_oldval)
+{
+ int oldval, ret;
+
+ asm("0: \n"
+ " orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */
+ " ckeq icc3,cc7 \n"
+ "1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */
+ " orcr cc7,cc7,cc3 \n" /* set CC3 to true */
+ " add %1,%3,%3 \n"
+ "2: cst.p %3,%M0 ,cc3,#1 \n"
+ " corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */
+ " beq icc3,#0,0b \n"
+ " setlos 0,%2 \n"
+ "3: \n"
+ ".subsection 2 \n"
+ "4: setlos %5,%2 \n"
+ " bra 3b \n"
+ ".previous \n"
+ ".section __ex_table,\"a\" \n"
+ " .balign 8 \n"
+ " .long 1b,4b \n"
+ " .long 2b,4b \n"
+ ".previous"
+ : "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg)
+ : "3"(oparg), "i"(-EFAULT)
+ : "memory", "cc7", "cc3", "icc3"
+ );
+
+ *_oldval = oldval;
+ return ret;
+}
+
+static inline int atomic_futex_op_xchg_or(int oparg, int __user *uaddr, int *_oldval)
+{
+ int oldval, ret;
+
+ asm("0: \n"
+ " orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */
+ " ckeq icc3,cc7 \n"
+ "1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */
+ " orcr cc7,cc7,cc3 \n" /* set CC3 to true */
+ " or %1,%3,%3 \n"
+ "2: cst.p %3,%M0 ,cc3,#1 \n"
+ " corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */
+ " beq icc3,#0,0b \n"
+ " setlos 0,%2 \n"
+ "3: \n"
+ ".subsection 2 \n"
+ "4: setlos %5,%2 \n"
+ " bra 3b \n"
+ ".previous \n"
+ ".section __ex_table,\"a\" \n"
+ " .balign 8 \n"
+ " .long 1b,4b \n"
+ " .long 2b,4b \n"
+ ".previous"
+ : "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg)
+ : "3"(oparg), "i"(-EFAULT)
+ : "memory", "cc7", "cc3", "icc3"
+ );
+
+ *_oldval = oldval;
+ return ret;
+}
+
+static inline int atomic_futex_op_xchg_and(int oparg, int __user *uaddr, int *_oldval)
+{
+ int oldval, ret;
+
+ asm("0: \n"
+ " orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */
+ " ckeq icc3,cc7 \n"
+ "1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */
+ " orcr cc7,cc7,cc3 \n" /* set CC3 to true */
+ " and %1,%3,%3 \n"
+ "2: cst.p %3,%M0 ,cc3,#1 \n"
+ " corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */
+ " beq icc3,#0,0b \n"
+ " setlos 0,%2 \n"
+ "3: \n"
+ ".subsection 2 \n"
+ "4: setlos %5,%2 \n"
+ " bra 3b \n"
+ ".previous \n"
+ ".section __ex_table,\"a\" \n"
+ " .balign 8 \n"
+ " .long 1b,4b \n"
+ " .long 2b,4b \n"
+ ".previous"
+ : "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg)
+ : "3"(oparg), "i"(-EFAULT)
+ : "memory", "cc7", "cc3", "icc3"
+ );
+
+ *_oldval = oldval;
+ return ret;
+}
+
+static inline int atomic_futex_op_xchg_xor(int oparg, int __user *uaddr, int *_oldval)
+{
+ int oldval, ret;
+
+ asm("0: \n"
+ " orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */
+ " ckeq icc3,cc7 \n"
+ "1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */
+ " orcr cc7,cc7,cc3 \n" /* set CC3 to true */
+ " xor %1,%3,%3 \n"
+ "2: cst.p %3,%M0 ,cc3,#1 \n"
+ " corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */
+ " beq icc3,#0,0b \n"
+ " setlos 0,%2 \n"
+ "3: \n"
+ ".subsection 2 \n"
+ "4: setlos %5,%2 \n"
+ " bra 3b \n"
+ ".previous \n"
+ ".section __ex_table,\"a\" \n"
+ " .balign 8 \n"
+ " .long 1b,4b \n"
+ " .long 2b,4b \n"
+ ".previous"
+ : "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg)
+ : "3"(oparg), "i"(-EFAULT)
+ : "memory", "cc7", "cc3", "icc3"
+ );
+
+ *_oldval = oldval;
+ return ret;
+}
+
+/*****************************************************************************/
+/*
+ * do the futex operations
+ */
+int futex_atomic_op_inuser(int encoded_op, int __user *uaddr)
+{
+ int op = (encoded_op >> 28) & 7;
+ int cmp = (encoded_op >> 24) & 15;
+ int oparg = (encoded_op << 8) >> 20;
+ int cmparg = (encoded_op << 20) >> 20;
+ int oldval = 0, ret;
+
+ if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
+ oparg = 1 << oparg;
+
+ if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int)))
+ return -EFAULT;
+
+ inc_preempt_count();
+
+ switch (op) {
+ case FUTEX_OP_SET:
+ ret = atomic_futex_op_xchg_set(oparg, uaddr, &oldval);
+ break;
+ case FUTEX_OP_ADD:
+ ret = atomic_futex_op_xchg_add(oparg, uaddr, &oldval);
+ break;
+ case FUTEX_OP_OR:
+ ret = atomic_futex_op_xchg_or(oparg, uaddr, &oldval);
+ break;
+ case FUTEX_OP_ANDN:
+ ret = atomic_futex_op_xchg_and(~oparg, uaddr, &oldval);
+ break;
+ case FUTEX_OP_XOR:
+ ret = atomic_futex_op_xchg_xor(oparg, uaddr, &oldval);
+ break;
+ default:
+ ret = -ENOSYS;
+ break;
+ }
+
+ dec_preempt_count();
+
+ if (!ret) {
+ switch (cmp) {
+ case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
+ case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
+ case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
+ case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
+ case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
+ case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
+ default: ret = -ENOSYS; break;
+ }
+ }
+
+ return ret;
+
+} /* end futex_atomic_op_inuser() */
diff --git a/arch/frv/kernel/head.S b/arch/frv/kernel/head.S
index c73b4fe..29a5265 100644
--- a/arch/frv/kernel/head.S
+++ b/arch/frv/kernel/head.S
@@ -513,6 +513,9 @@ __head_mmu_enabled:
movgs gr0,ccr
movgs gr0,cccr
+ # initialise the virtual interrupt handling
+ subcc gr0,gr0,gr0,icc2 /* set Z, clear C */
+
#ifdef CONFIG_MMU
movgs gr3,scr2
movgs gr3,scr3
diff --git a/arch/frv/kernel/irq.c b/arch/frv/kernel/irq.c
index 8c524cd..27ab4c3 100644
--- a/arch/frv/kernel/irq.c
+++ b/arch/frv/kernel/irq.c
@@ -32,6 +32,7 @@
#include <linux/irq.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
+#include <linux/module.h>
#include <asm/atomic.h>
#include <asm/io.h>
@@ -178,6 +179,8 @@ void disable_irq_nosync(unsigned int irq)
spin_unlock_irqrestore(&level->lock, flags);
}
+EXPORT_SYMBOL(disable_irq_nosync);
+
/**
* disable_irq - disable an irq and wait for completion
* @irq: Interrupt to disable
@@ -204,6 +207,8 @@ void disable_irq(unsigned int irq)
#endif
}
+EXPORT_SYMBOL(disable_irq);
+
/**
* enable_irq - enable handling of an irq
* @irq: Interrupt to enable
@@ -268,6 +273,8 @@ void enable_irq(unsigned int irq)
spin_unlock_irqrestore(&level->lock, flags);
}
+EXPORT_SYMBOL(enable_irq);
+
/*****************************************************************************/
/*
* handles all normal device IRQ's
@@ -280,18 +287,11 @@ asmlinkage void do_IRQ(void)
struct irq_source *source;
int level, cpu;
+ irq_enter();
+
level = (__frame->tbr >> 4) & 0xf;
cpu = smp_processor_id();
-#if 0
- {
- static u32 irqcount;
- *(volatile u32 *) 0xe1200004 = ~((irqcount++ << 8) | level);
- *(volatile u16 *) 0xffc00100 = (u16) ~0x9999;
- mb();
- }
-#endif
-
if ((unsigned long) __frame - (unsigned long) (current + 1) < 512)
BUG();
@@ -301,40 +301,12 @@ asmlinkage void do_IRQ(void)
kstat_this_cpu.irqs[level]++;
- irq_enter();
-
for (source = frv_irq_levels[level].sources; source; source = source->next)
source->doirq(source);
- irq_exit();
-
__clr_MASK(level);
- /* only process softirqs if we didn't interrupt another interrupt handler */
- if ((__frame->psr & PSR_PIL) == PSR_PIL_0)
- if (local_softirq_pending())
- do_softirq();
-
-#ifdef CONFIG_PREEMPT
- local_irq_disable();
- while (--current->preempt_count == 0) {
- if (!(__frame->psr & PSR_S) ||
- current->need_resched == 0 ||
- in_interrupt())
- break;
- current->preempt_count++;
- local_irq_enable();
- preempt_schedule();
- local_irq_disable();
- }
-#endif
-
-#if 0
- {
- *(volatile u16 *) 0xffc00100 = (u16) ~0x6666;
- mb();
- }
-#endif
+ irq_exit();
} /* end do_IRQ() */
@@ -425,6 +397,8 @@ int request_irq(unsigned int irq,
return retval;
}
+EXPORT_SYMBOL(request_irq);
+
/**
* free_irq - free an interrupt
* @irq: Interrupt line to free
@@ -496,6 +470,8 @@ void free_irq(unsigned int irq, void *dev_id)
}
}
+EXPORT_SYMBOL(free_irq);
+
/*
* IRQ autodetection code..
*
@@ -519,6 +495,8 @@ unsigned long probe_irq_on(void)
return 0;
}
+EXPORT_SYMBOL(probe_irq_on);
+
/*
* Return a mask of triggered interrupts (this
* can handle only legacy ISA interrupts).
@@ -542,6 +520,8 @@ unsigned int probe_irq_mask(unsigned long xmask)
return 0;
}
+EXPORT_SYMBOL(probe_irq_mask);
+
/*
* Return the one interrupt that triggered (this can
* handle any interrupt source).
@@ -571,6 +551,8 @@ int probe_irq_off(unsigned long xmask)
return -1;
}
+EXPORT_SYMBOL(probe_irq_off);
+
/* this was setup_x86_irq but it seems pretty generic */
int setup_irq(unsigned int irq, struct irqaction *new)
{
diff --git a/arch/frv/kernel/module.c b/arch/frv/kernel/module.c
new file mode 100644
index 0000000..850d168
--- /dev/null
+++ b/arch/frv/kernel/module.c
@@ -0,0 +1,80 @@
+/* module.c: FRV specific module loading bits
+ *
+ * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ * - Derived from arch/i386/kernel/module.c, Copyright (C) 2001 Rusty Russell.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <linux/moduleloader.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/fs.h>
+#include <linux/string.h>
+#include <linux/kernel.h>
+
+#if 0
+#define DEBUGP printk
+#else
+#define DEBUGP(fmt...)
+#endif
+
+void *module_alloc(unsigned long size)
+{
+ if (size == 0)
+ return NULL;
+
+ return vmalloc_exec(size);
+}
+
+
+/* Free memory returned from module_alloc */
+void module_free(struct module *mod, void *module_region)
+{
+ vfree(module_region);
+ /* FIXME: If module_region == mod->init_region, trim exception
+ table entries. */
+}
+
+/* We don't need anything special. */
+int module_frob_arch_sections(Elf_Ehdr *hdr,
+ Elf_Shdr *sechdrs,
+ char *secstrings,
+ struct module *mod)
+{
+ return 0;
+}
+
+int apply_relocate(Elf32_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ printk(KERN_ERR "module %s: ADD RELOCATION unsupported\n", me->name);
+ return -ENOEXEC;
+}
+
+int apply_relocate_add(Elf32_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ printk(KERN_ERR "module %s: ADD RELOCATION unsupported\n", me->name);
+ return -ENOEXEC;
+}
+
+int module_finalize(const Elf_Ehdr *hdr,
+ const Elf_Shdr *sechdrs,
+ struct module *me)
+{
+ return 0;
+}
+
+void module_arch_cleanup(struct module *mod)
+{
+}
diff --git a/arch/frv/kernel/pm.c b/arch/frv/kernel/pm.c
index 712c3c2..f0b8fff 100644
--- a/arch/frv/kernel/pm.c
+++ b/arch/frv/kernel/pm.c
@@ -13,6 +13,7 @@
#include <linux/config.h>
#include <linux/init.h>
+#include <linux/module.h>
#include <linux/pm.h>
#include <linux/pm_legacy.h>
#include <linux/sched.h>
@@ -27,6 +28,7 @@
#include "local.h"
void (*pm_power_off)(void);
+EXPORT_SYMBOL(pm_power_off);
extern void frv_change_cmode(int);
diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c
index 54a4521..0fff8a6 100644
--- a/arch/frv/kernel/process.c
+++ b/arch/frv/kernel/process.c
@@ -204,7 +204,7 @@ int copy_thread(int nr, unsigned long clone_flags,
regs0 = __kernel_frame0_ptr;
childregs0 = (struct pt_regs *)
- ((unsigned long) p->thread_info + THREAD_SIZE - USER_CONTEXT_SIZE);
+ (task_stack_page(p) + THREAD_SIZE - USER_CONTEXT_SIZE);
childregs = childregs0;
/* set up the userspace frame (the only place that the USP is stored) */
@@ -220,7 +220,7 @@ int copy_thread(int nr, unsigned long clone_flags,
*childregs = *regs;
childregs->sp = (unsigned long) childregs0;
childregs->next_frame = childregs0;
- childregs->gr15 = (unsigned long) p->thread_info;
+ childregs->gr15 = (unsigned long) task_thread_info(p);
childregs->gr29 = (unsigned long) p;
}
@@ -244,28 +244,6 @@ int copy_thread(int nr, unsigned long clone_flags,
} /* end copy_thread() */
/*
- * fill in the user structure for a core dump..
- */
-void dump_thread(struct pt_regs *regs, struct user *dump)
-{
-#if 0
- /* changed the size calculations - should hopefully work better. lbt */
- dump->magic = CMAGIC;
- dump->start_code = 0;
- dump->start_stack = user_stack(regs) & ~(PAGE_SIZE - 1);
- dump->u_tsize = ((unsigned long) current->mm->end_code) >> PAGE_SHIFT;
- dump->u_dsize = ((unsigned long) (current->mm->brk + (PAGE_SIZE-1))) >> PAGE_SHIFT;
- dump->u_dsize -= dump->u_tsize;
- dump->u_ssize = 0;
-
- if (dump->start_stack < TASK_SIZE)
- dump->u_ssize = ((unsigned long) (TASK_SIZE - dump->start_stack)) >> PAGE_SHIFT;
-
- dump->regs = *(struct user_context *) regs;
-#endif
-}
-
-/*
* sys_execve() executes a new program.
*/
asmlinkage int sys_execve(char *name, char **argv, char **envp)
diff --git a/arch/frv/kernel/setup.c b/arch/frv/kernel/setup.c
index 767ebb5..5908dea 100644
--- a/arch/frv/kernel/setup.c
+++ b/arch/frv/kernel/setup.c
@@ -787,6 +787,7 @@ void __init setup_arch(char **cmdline_p)
#endif
/* register those serial ports that are available */
+#ifdef CONFIG_FRV_ONCPU_SERIAL
#ifndef CONFIG_GDBSTUB_UART0
__reg(UART0_BASE + UART_IER * 8) = 0;
early_serial_setup(&__frv_uart0);
@@ -795,6 +796,7 @@ void __init setup_arch(char **cmdline_p)
__reg(UART1_BASE + UART_IER * 8) = 0;
early_serial_setup(&__frv_uart1);
#endif
+#endif
#if defined(CONFIG_CHR_DEV_FLASH) || defined(CONFIG_BLK_DEV_FLASH)
/* we need to initialize the Flashrom device here since we might
diff --git a/arch/frv/kernel/signal.c b/arch/frv/kernel/signal.c
index d4ccc07..679c1d5 100644
--- a/arch/frv/kernel/signal.c
+++ b/arch/frv/kernel/signal.c
@@ -35,74 +35,22 @@ struct fdpic_func_descriptor {
unsigned long GOT;
};
-asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
-
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int sys_sigsuspend(int history0, int history1, old_sigset_t mask)
{
- sigset_t saveset;
-
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
- saveset = current->blocked;
+ current->saved_sigmask = current->blocked;
siginitset(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
- __frame->gr8 = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(__frame, &saveset))
- /* return the signal number as the return value of this function
- * - this is an utterly evil hack. syscalls should not invoke do_signal()
- * as entry.S sets regs->gr8 to the return value of the system call
- * - we can't just use sigpending() as we'd have to discard SIG_IGN signals
- * and call waitpid() if SIGCHLD needed discarding
- * - this only works on the i386 because it passes arguments to the signal
- * handler on the stack, and the return value in EAX is effectively
- * discarded
- */
- return __frame->gr8;
- }
-}
-
-asmlinkage int sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize)
-{
- sigset_t saveset, newset;
-
- /* XXX: Don't preclude handling different sized sigset_t's. */
- if (sigsetsize != sizeof(sigset_t))
- return -EINVAL;
-
- if (copy_from_user(&newset, unewset, sizeof(newset)))
- return -EFAULT;
- sigdelsetmask(&newset, ~_BLOCKABLE);
-
- spin_lock_irq(&current->sighand->siglock);
- saveset = current->blocked;
- current->blocked = newset;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- __frame->gr8 = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(__frame, &saveset))
- /* return the signal number as the return value of this function
- * - this is an utterly evil hack. syscalls should not invoke do_signal()
- * as entry.S sets regs->gr8 to the return value of the system call
- * - we can't just use sigpending() as we'd have to discard SIG_IGN signals
- * and call waitpid() if SIGCHLD needed discarding
- * - this only works on the i386 because it passes arguments to the signal
- * handler on the stack, and the return value in EAX is effectively
- * discarded
- */
- return __frame->gr8;
- }
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ set_thread_flag(TIF_RESTORE_SIGMASK);
+ return -ERESTARTNOHAND;
}
asmlinkage int sys_sigaction(int sig,
@@ -276,13 +224,12 @@ static int setup_sigcontext(struct sigcontext __user *sc, unsigned long mask)
* Determine which stack to use..
*/
static inline void __user *get_sigframe(struct k_sigaction *ka,
- struct pt_regs *regs,
size_t frame_size)
{
unsigned long sp;
/* Default to using normal stack */
- sp = regs->sp;
+ sp = __frame->sp;
/* This is the X/Open sanctioned signal stack switching. */
if (ka->sa.sa_flags & SA_ONSTACK) {
@@ -291,18 +238,19 @@ static inline void __user *get_sigframe(struct k_sigaction *ka,
}
return (void __user *) ((sp - frame_size) & ~7UL);
+
} /* end get_sigframe() */
/*****************************************************************************/
/*
*
*/
-static void setup_frame(int sig, struct k_sigaction *ka, sigset_t *set, struct pt_regs * regs)
+static int setup_frame(int sig, struct k_sigaction *ka, sigset_t *set)
{
struct sigframe __user *frame;
int rsig;
- frame = get_sigframe(ka, regs, sizeof(*frame));
+ frame = get_sigframe(ka, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv;
@@ -346,47 +294,51 @@ static void setup_frame(int sig, struct k_sigaction *ka, sigset_t *set, struct p
}
/* set up registers for signal handler */
- regs->sp = (unsigned long) frame;
- regs->lr = (unsigned long) &frame->retcode;
- regs->gr8 = sig;
+ __frame->sp = (unsigned long) frame;
+ __frame->lr = (unsigned long) &frame->retcode;
+ __frame->gr8 = sig;
if (get_personality & FDPIC_FUNCPTRS) {
struct fdpic_func_descriptor __user *funcptr =
(struct fdpic_func_descriptor *) ka->sa.sa_handler;
- __get_user(regs->pc, &funcptr->text);
- __get_user(regs->gr15, &funcptr->GOT);
+ __get_user(__frame->pc, &funcptr->text);
+ __get_user(__frame->gr15, &funcptr->GOT);
} else {
- regs->pc = (unsigned long) ka->sa.sa_handler;
- regs->gr15 = 0;
+ __frame->pc = (unsigned long) ka->sa.sa_handler;
+ __frame->gr15 = 0;
}
set_fs(USER_DS);
+ /* the tracer may want to single-step inside the handler */
+ if (test_thread_flag(TIF_SINGLESTEP))
+ ptrace_notify(SIGTRAP);
+
#if DEBUG_SIG
printk("SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n",
- sig, current->comm, current->pid, frame, regs->pc, frame->pretcode);
+ sig, current->comm, current->pid, frame, __frame->pc,
+ frame->pretcode);
#endif
- return;
+ return 0;
give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
-
force_sig(SIGSEGV, current);
+ return -EFAULT;
+
} /* end setup_frame() */
/*****************************************************************************/
/*
*
*/
-static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set, struct pt_regs * regs)
+static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+ sigset_t *set)
{
struct rt_sigframe __user *frame;
int rsig;
- frame = get_sigframe(ka, regs, sizeof(*frame));
+ frame = get_sigframe(ka, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv;
@@ -409,7 +361,7 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
if (__put_user(0, &frame->uc.uc_flags) ||
__put_user(0, &frame->uc.uc_link) ||
__put_user((void*)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp) ||
- __put_user(sas_ss_flags(regs->sp), &frame->uc.uc_stack.ss_flags) ||
+ __put_user(sas_ss_flags(__frame->sp), &frame->uc.uc_stack.ss_flags) ||
__put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size))
goto give_sigsegv;
@@ -440,34 +392,38 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
}
/* Set up registers for signal handler */
- regs->sp = (unsigned long) frame;
- regs->lr = (unsigned long) &frame->retcode;
- regs->gr8 = sig;
- regs->gr9 = (unsigned long) &frame->info;
+ __frame->sp = (unsigned long) frame;
+ __frame->lr = (unsigned long) &frame->retcode;
+ __frame->gr8 = sig;
+ __frame->gr9 = (unsigned long) &frame->info;
if (get_personality & FDPIC_FUNCPTRS) {
struct fdpic_func_descriptor *funcptr =
(struct fdpic_func_descriptor __user *) ka->sa.sa_handler;
- __get_user(regs->pc, &funcptr->text);
- __get_user(regs->gr15, &funcptr->GOT);
+ __get_user(__frame->pc, &funcptr->text);
+ __get_user(__frame->gr15, &funcptr->GOT);
} else {
- regs->pc = (unsigned long) ka->sa.sa_handler;
- regs->gr15 = 0;
+ __frame->pc = (unsigned long) ka->sa.sa_handler;
+ __frame->gr15 = 0;
}
set_fs(USER_DS);
+ /* the tracer may want to single-step inside the handler */
+ if (test_thread_flag(TIF_SINGLESTEP))
+ ptrace_notify(SIGTRAP);
+
#if DEBUG_SIG
printk("SIG deliver %d (%s:%d): sp=%p pc=%lx ra=%p\n",
- sig, current->comm, current->pid, frame, regs->pc, frame->pretcode);
+ sig, current->comm, current->pid, frame, __frame->pc,
+ frame->pretcode);
#endif
- return;
+ return 0;
give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
force_sig(SIGSEGV, current);
+ return -EFAULT;
} /* end setup_rt_frame() */
@@ -475,43 +431,51 @@ give_sigsegv:
/*
* OK, we're invoking a handler
*/
-static void handle_signal(unsigned long sig, siginfo_t *info,
- struct k_sigaction *ka, sigset_t *oldset,
- struct pt_regs *regs)
+static int handle_signal(unsigned long sig, siginfo_t *info,
+ struct k_sigaction *ka, sigset_t *oldset)
{
+ int ret;
+
/* Are we from a system call? */
- if (in_syscall(regs)) {
+ if (in_syscall(__frame)) {
/* If so, check system call restarting.. */
- switch (regs->gr8) {
+ switch (__frame->gr8) {
case -ERESTART_RESTARTBLOCK:
case -ERESTARTNOHAND:
- regs->gr8 = -EINTR;
+ __frame->gr8 = -EINTR;
break;
case -ERESTARTSYS:
if (!(ka->sa.sa_flags & SA_RESTART)) {
- regs->gr8 = -EINTR;
+ __frame->gr8 = -EINTR;
break;
}
+
/* fallthrough */
case -ERESTARTNOINTR:
- regs->gr8 = regs->orig_gr8;
- regs->pc -= 4;
+ __frame->gr8 = __frame->orig_gr8;
+ __frame->pc -= 4;
}
}
/* Set up the stack frame */
if (ka->sa.sa_flags & SA_SIGINFO)
- setup_rt_frame(sig, ka, info, oldset, regs);
+ ret = setup_rt_frame(sig, ka, info, oldset);
else
- setup_frame(sig, ka, oldset, regs);
+ ret = setup_frame(sig, ka, oldset);
+
+ if (ret == 0) {
+ spin_lock_irq(&current->sighand->siglock);
+ sigorsets(&current->blocked, &current->blocked,
+ &ka->sa.sa_mask);
+ if (!(ka->sa.sa_flags & SA_NODEFER))
+ sigaddset(&current->blocked, sig);
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+ }
+
+ return ret;
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked, &ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
} /* end handle_signal() */
/*****************************************************************************/
@@ -520,10 +484,11 @@ static void handle_signal(unsigned long sig, siginfo_t *info,
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*/
-int do_signal(struct pt_regs *regs, sigset_t *oldset)
+static void do_signal(void)
{
struct k_sigaction ka;
siginfo_t info;
+ sigset_t *oldset;
int signr;
/*
@@ -532,45 +497,63 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
* kernel mode. Just return without doing anything
* if so.
*/
- if (!user_mode(regs))
- return 1;
+ if (!user_mode(__frame))
+ return;
if (try_to_freeze())
goto no_signal;
- if (!oldset)
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+ else
oldset = &current->blocked;
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+ signr = get_signal_to_deliver(&info, &ka, __frame, NULL);
if (signr > 0) {
- handle_signal(signr, &info, &ka, oldset, regs);
- return 1;
+ if (handle_signal(signr, &info, &ka, oldset) == 0) {
+ /* a signal was successfully delivered; the saved
+ * sigmask will have been stored in the signal frame,
+ * and will be restored by sigreturn, so we can simply
+ * clear the TIF_RESTORE_SIGMASK flag */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ }
+
+ return;
}
- no_signal:
+no_signal:
/* Did we come from a system call? */
- if (regs->syscallno >= 0) {
+ if (__frame->syscallno >= 0) {
/* Restart the system call - no handlers present */
- if (regs->gr8 == -ERESTARTNOHAND ||
- regs->gr8 == -ERESTARTSYS ||
- regs->gr8 == -ERESTARTNOINTR) {
- regs->gr8 = regs->orig_gr8;
- regs->pc -= 4;
- }
+ switch (__frame->gr8) {
+ case -ERESTARTNOHAND:
+ case -ERESTARTSYS:
+ case -ERESTARTNOINTR:
+ __frame->gr8 = __frame->orig_gr8;
+ __frame->pc -= 4;
+ break;
- if (regs->gr8 == -ERESTART_RESTARTBLOCK){
- regs->gr8 = __NR_restart_syscall;
- regs->pc -= 4;
+ case -ERESTART_RESTARTBLOCK:
+ __frame->gr8 = __NR_restart_syscall;
+ __frame->pc -= 4;
+ break;
}
}
- return 0;
+ /* if there's no signal to deliver, we just put the saved sigmask
+ * back */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+ }
+
} /* end do_signal() */
/*****************************************************************************/
/*
* notification of userspace execution resumption
- * - triggered by current->work.notify_resume
+ * - triggered by the TIF_WORK_MASK flags
*/
asmlinkage void do_notify_resume(__u32 thread_info_flags)
{
@@ -579,7 +562,7 @@ asmlinkage void do_notify_resume(__u32 thread_info_flags)
clear_thread_flag(TIF_SINGLESTEP);
/* deal with pending signal delivery */
- if (thread_info_flags & _TIF_SIGPENDING)
- do_signal(__frame, NULL);
+ if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
+ do_signal();
} /* end do_notify_resume() */
diff --git a/arch/frv/kernel/time.c b/arch/frv/kernel/time.c
index 2e97412..24cf85f 100644
--- a/arch/frv/kernel/time.c
+++ b/arch/frv/kernel/time.c
@@ -189,6 +189,8 @@ void do_gettimeofday(struct timeval *tv)
tv->tv_usec = usec;
}
+EXPORT_SYMBOL(do_gettimeofday);
+
int do_settimeofday(struct timespec *tv)
{
time_t wtm_sec, sec = tv->tv_sec;
@@ -218,6 +220,7 @@ int do_settimeofday(struct timespec *tv)
clock_was_set();
return 0;
}
+
EXPORT_SYMBOL(do_settimeofday);
/*
diff --git a/arch/frv/kernel/traps.c b/arch/frv/kernel/traps.c
index 89073ca..9eb84b2 100644
--- a/arch/frv/kernel/traps.c
+++ b/arch/frv/kernel/traps.c
@@ -19,6 +19,7 @@
#include <linux/string.h>
#include <linux/linkage.h>
#include <linux/init.h>
+#include <linux/module.h>
#include <asm/setup.h>
#include <asm/fpu.h>
@@ -250,6 +251,8 @@ void dump_stack(void)
show_stack(NULL, NULL);
}
+EXPORT_SYMBOL(dump_stack);
+
void show_stack(struct task_struct *task, unsigned long *sp)
{
}
diff --git a/arch/frv/kernel/uaccess.c b/arch/frv/kernel/uaccess.c
index f3fd58a..9b751c0 100644
--- a/arch/frv/kernel/uaccess.c
+++ b/arch/frv/kernel/uaccess.c
@@ -10,6 +10,7 @@
*/
#include <linux/mm.h>
+#include <linux/module.h>
#include <asm/uaccess.h>
/*****************************************************************************/
@@ -58,8 +59,11 @@ long strncpy_from_user(char *dst, const char *src, long count)
memset(p, 0, count); /* clear remainder of buffer [security] */
return err;
+
} /* end strncpy_from_user() */
+EXPORT_SYMBOL(strncpy_from_user);
+
/*****************************************************************************/
/*
* Return the size of a string (including the ending 0)
@@ -92,4 +96,7 @@ long strnlen_user(const char *src, long count)
}
return p - src + 1; /* return length including NUL */
+
} /* end strnlen_user() */
+
+EXPORT_SYMBOL(strnlen_user);
diff --git a/arch/frv/kernel/vmlinux.lds.S b/arch/frv/kernel/vmlinux.lds.S
index fceafd2..f474534 100644
--- a/arch/frv/kernel/vmlinux.lds.S
+++ b/arch/frv/kernel/vmlinux.lds.S
@@ -112,6 +112,7 @@ SECTIONS
#endif
)
SCHED_TEXT
+ LOCK_TEXT
*(.fixup)
*(.gnu.warning)
*(.exitcall.exit)
generated by cgit v1.1 at 2025-08-17 03:19:50 +0000