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-rw-r--r--arch/parisc/kernel/entry.S116
-rw-r--r--arch/parisc/kernel/pacache.S125
-rw-r--r--arch/parisc/kernel/pci-dma.c199
-rw-r--r--arch/parisc/kernel/process.c2
-rw-r--r--arch/parisc/kernel/processor.c2
-rw-r--r--arch/parisc/kernel/ptrace.c100
-rw-r--r--arch/parisc/kernel/real2.S6
-rw-r--r--arch/parisc/kernel/setup.c8
-rw-r--r--arch/parisc/kernel/stacktrace.c15
-rw-r--r--arch/parisc/kernel/sys_parisc.c5
-rw-r--r--arch/parisc/kernel/syscall.S59
-rw-r--r--arch/parisc/kernel/traps.c39
-rw-r--r--arch/parisc/kernel/unwind.c128
13 files changed, 310 insertions, 494 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S
index 1b4732e20137..242c5ab65611 100644
--- a/arch/parisc/kernel/entry.S
+++ b/arch/parisc/kernel/entry.S
@@ -36,6 +36,7 @@
#include <asm/signal.h>
#include <asm/unistd.h>
#include <asm/ldcw.h>
+#include <asm/traps.h>
#include <asm/thread_info.h>
#include <linux/linkage.h>
@@ -692,7 +693,7 @@ ENTRY(fault_vector_20)
def 3
extint 4
def 5
- itlb_20 6
+ itlb_20 PARISC_ITLB_TRAP
def 7
def 8
def 9
@@ -735,7 +736,7 @@ ENTRY(fault_vector_11)
def 3
extint 4
def 5
- itlb_11 6
+ itlb_11 PARISC_ITLB_TRAP
def 7
def 8
def 9
@@ -766,7 +767,6 @@ END(fault_vector_11)
#endif
/* Fault vector is separately protected and *must* be on its own page */
.align PAGE_SIZE
-ENTRY(end_fault_vector)
.import handle_interruption,code
.import do_cpu_irq_mask,code
@@ -777,8 +777,7 @@ ENTRY(end_fault_vector)
* copy_thread moved args into task save area.
*/
-ENTRY_CFI(ret_from_kernel_thread)
-
+ENTRY(ret_from_kernel_thread)
/* Call schedule_tail first though */
BL schedule_tail, %r2
nop
@@ -793,7 +792,7 @@ ENTRY_CFI(ret_from_kernel_thread)
copy %r31, %r2
b finish_child_return
nop
-ENDPROC_CFI(ret_from_kernel_thread)
+END(ret_from_kernel_thread)
/*
@@ -818,7 +817,7 @@ ENTRY_CFI(_switch_to)
bv %r0(%r2)
mtctl %r25,%cr30
-_switch_to_ret:
+ENTRY(_switch_to_ret)
mtctl %r0, %cr0 /* Needed for single stepping */
callee_rest
callee_rest_float
@@ -888,7 +887,7 @@ ENTRY_CFI(syscall_exit_rfi)
STREG %r19,PT_SR6(%r16)
STREG %r19,PT_SR7(%r16)
-intr_return:
+ENTRY(intr_return)
/* check for reschedule */
mfctl %cr30,%r1
LDREG TI_FLAGS(%r1),%r19 /* sched.h: TIF_NEED_RESCHED */
@@ -1068,21 +1067,12 @@ ENTRY_CFI(intr_save) /* for os_hpmc */
save_specials %r29
/* If this trap is a itlb miss, skip saving/adjusting isr/ior */
+ cmpib,COND(=),n PARISC_ITLB_TRAP,%r26,skip_save_ior
- /*
- * FIXME: 1) Use a #define for the hardwired "6" below (and in
- * traps.c.
- * 2) Once we start executing code above 4 Gb, we need
- * to adjust iasq/iaoq here in the same way we
- * adjust isr/ior below.
- */
-
- cmpib,COND(=),n 6,%r26,skip_save_ior
-
- mfctl %cr20, %r16 /* isr */
+ mfctl %isr, %r16
nop /* serialize mfctl on PA 2.0 to avoid 4 cycle penalty */
- mfctl %cr21, %r17 /* ior */
+ mfctl %ior, %r17
#ifdef CONFIG_64BIT
@@ -1094,22 +1084,34 @@ ENTRY_CFI(intr_save) /* for os_hpmc */
extrd,u,*<> %r8,PSW_W_BIT,1,%r0
depdi 0,1,2,%r17
- /*
- * FIXME: This code has hardwired assumptions about the split
- * between space bits and offset bits. This will change
- * when we allow alternate page sizes.
- */
-
- /* adjust isr/ior. */
- extrd,u %r16,63,SPACEID_SHIFT,%r1 /* get high bits from isr for ior */
- depd %r1,31,SPACEID_SHIFT,%r17 /* deposit them into ior */
- depdi 0,63,SPACEID_SHIFT,%r16 /* clear them from isr */
+ /* adjust isr/ior: get high bits from isr and deposit in ior */
+ space_adjust %r16,%r17,%r1
#endif
STREG %r16, PT_ISR(%r29)
STREG %r17, PT_IOR(%r29)
+#if 0 && defined(CONFIG_64BIT)
+ /* Revisit when we have 64-bit code above 4Gb */
+ b,n intr_save2
skip_save_ior:
+ /* We have a itlb miss, and when executing code above 4 Gb on ILP64, we
+ * need to adjust iasq/iaoq here in the same way we adjusted isr/ior
+ * above.
+ */
+ extrd,u,* %r8,PSW_W_BIT,1,%r1
+ cmpib,COND(=),n 1,%r1,intr_save2
+ LDREG PT_IASQ0(%r29), %r16
+ LDREG PT_IAOQ0(%r29), %r17
+ /* adjust iasq/iaoq */
+ space_adjust %r16,%r17,%r1
+ STREG %r16, PT_IASQ0(%r29)
+ STREG %r17, PT_IAOQ0(%r29)
+#else
+skip_save_ior:
+#endif
+
+intr_save2:
virt_map
save_general %r29
@@ -1747,7 +1749,7 @@ fork_like fork
fork_like vfork
/* Set the return value for the child */
-ENTRY_CFI(child_return)
+ENTRY(child_return)
BL schedule_tail, %r2
nop
finish_child_return:
@@ -1759,7 +1761,7 @@ finish_child_return:
reg_restore %r1
b syscall_exit
copy %r0,%r28
-ENDPROC_CFI(child_return)
+END(child_return)
ENTRY_CFI(sys_rt_sigreturn_wrapper)
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r26
@@ -1791,7 +1793,7 @@ ENTRY_CFI(sys_rt_sigreturn_wrapper)
LDREG PT_GR28(%r1),%r28 /* reload original r28 for syscall_exit */
ENDPROC_CFI(sys_rt_sigreturn_wrapper)
-ENTRY_CFI(syscall_exit)
+ENTRY(syscall_exit)
/* NOTE: Not all syscalls exit this way. rt_sigreturn will exit
* via syscall_exit_rfi if the signal was received while the process
* was running.
@@ -1990,21 +1992,16 @@ syscall_do_resched:
#else
nop
#endif
-ENDPROC_CFI(syscall_exit)
+END(syscall_exit)
#ifdef CONFIG_FUNCTION_TRACER
.import ftrace_function_trampoline,code
.align L1_CACHE_BYTES
- .globl mcount
- .type mcount, @function
-ENTRY(mcount)
+ENTRY_CFI(mcount, caller)
_mcount:
.export _mcount,data
- .proc
- .callinfo caller,frame=0
- .entry
/*
* The 64bit mcount() function pointer needs 4 dwords, of which the
* first two are free. We optimize it here and put 2 instructions for
@@ -2026,18 +2023,11 @@ ftrace_stub:
.dword mcount
.dword 0 /* code in head.S puts value of global gp here */
#endif
- .exit
- .procend
-ENDPROC(mcount)
+ENDPROC_CFI(mcount)
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.align 8
- .globl return_to_handler
- .type return_to_handler, @function
-ENTRY_CFI(return_to_handler)
- .proc
- .callinfo caller,frame=FRAME_SIZE
- .entry
+ENTRY_CFI(return_to_handler, caller,frame=FRAME_SIZE)
.export parisc_return_to_handler,data
parisc_return_to_handler:
copy %r3,%r1
@@ -2076,8 +2066,6 @@ parisc_return_to_handler:
bv %r0(%rp)
#endif
LDREGM -FRAME_SIZE(%sp),%r3
- .exit
- .procend
ENDPROC_CFI(return_to_handler)
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
@@ -2087,31 +2075,31 @@ ENDPROC_CFI(return_to_handler)
#ifdef CONFIG_IRQSTACKS
/* void call_on_stack(unsigned long param1, void *func,
unsigned long new_stack) */
-ENTRY_CFI(call_on_stack)
+ENTRY_CFI(call_on_stack, FRAME=2*FRAME_SIZE,CALLS,SAVE_RP,SAVE_SP)
+ENTRY(_call_on_stack)
copy %sp, %r1
/* Regarding the HPPA calling conventions for function pointers,
we assume the PIC register is not changed across call. For
CONFIG_64BIT, the argument pointer is left to point at the
argument region allocated for the call to call_on_stack. */
+
+ /* Switch to new stack. We allocate two frames. */
+ ldo 2*FRAME_SIZE(%arg2), %sp
# ifdef CONFIG_64BIT
- /* Switch to new stack. We allocate two 128 byte frames. */
- ldo 256(%arg2), %sp
/* Save previous stack pointer and return pointer in frame marker */
- STREG %rp, -144(%sp)
+ STREG %rp, -FRAME_SIZE-RP_OFFSET(%sp)
/* Calls always use function descriptor */
LDREG 16(%arg1), %arg1
bve,l (%arg1), %rp
- STREG %r1, -136(%sp)
- LDREG -144(%sp), %rp
+ STREG %r1, -FRAME_SIZE-REG_SZ(%sp)
+ LDREG -FRAME_SIZE-RP_OFFSET(%sp), %rp
bve (%rp)
- LDREG -136(%sp), %sp
+ LDREG -FRAME_SIZE-REG_SZ(%sp), %sp
# else
- /* Switch to new stack. We allocate two 64 byte frames. */
- ldo 128(%arg2), %sp
/* Save previous stack pointer and return pointer in frame marker */
- STREG %r1, -68(%sp)
- STREG %rp, -84(%sp)
+ STREG %r1, -FRAME_SIZE-REG_SZ(%sp)
+ STREG %rp, -FRAME_SIZE-RP_OFFSET(%sp)
/* Calls use function descriptor if PLABEL bit is set */
bb,>=,n %arg1, 30, 1f
depwi 0,31,2, %arg1
@@ -2119,9 +2107,9 @@ ENTRY_CFI(call_on_stack)
1:
be,l 0(%sr4,%arg1), %sr0, %r31
copy %r31, %rp
- LDREG -84(%sp), %rp
+ LDREG -FRAME_SIZE-RP_OFFSET(%sp), %rp
bv (%rp)
- LDREG -68(%sp), %sp
+ LDREG -FRAME_SIZE-REG_SZ(%sp), %sp
# endif /* CONFIG_64BIT */
ENDPROC_CFI(call_on_stack)
#endif /* CONFIG_IRQSTACKS */
diff --git a/arch/parisc/kernel/pacache.S b/arch/parisc/kernel/pacache.S
index 97451e67d35b..f33bf2d306d6 100644
--- a/arch/parisc/kernel/pacache.S
+++ b/arch/parisc/kernel/pacache.S
@@ -44,10 +44,6 @@
.align 16
ENTRY_CFI(flush_tlb_all_local)
- .proc
- .callinfo NO_CALLS
- .entry
-
/*
* The pitlbe and pdtlbe instructions should only be used to
* flush the entire tlb. Also, there needs to be no intervening
@@ -189,18 +185,11 @@ fdtdone:
2: bv %r0(%r2)
nop
-
- .exit
- .procend
ENDPROC_CFI(flush_tlb_all_local)
.import cache_info,data
ENTRY_CFI(flush_instruction_cache_local)
- .proc
- .callinfo NO_CALLS
- .entry
-
load32 cache_info, %r1
/* Flush Instruction Cache */
@@ -256,18 +245,11 @@ fisync:
mtsm %r22 /* restore I-bit */
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(flush_instruction_cache_local)
.import cache_info, data
ENTRY_CFI(flush_data_cache_local)
- .proc
- .callinfo NO_CALLS
- .entry
-
load32 cache_info, %r1
/* Flush Data Cache */
@@ -324,9 +306,6 @@ fdsync:
mtsm %r22 /* restore I-bit */
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(flush_data_cache_local)
/* Macros to serialize TLB purge operations on SMP. */
@@ -362,10 +341,6 @@ ENDPROC_CFI(flush_data_cache_local)
/* Clear page using kernel mapping. */
ENTRY_CFI(clear_page_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
#ifdef CONFIG_64BIT
/* Unroll the loop. */
@@ -424,18 +399,11 @@ ENTRY_CFI(clear_page_asm)
#endif
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(clear_page_asm)
/* Copy page using kernel mapping. */
ENTRY_CFI(copy_page_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
#ifdef CONFIG_64BIT
/* PA8x00 CPUs can consume 2 loads or 1 store per cycle.
* Unroll the loop by hand and arrange insn appropriately.
@@ -542,9 +510,6 @@ ENTRY_CFI(copy_page_asm)
#endif
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(copy_page_asm)
/*
@@ -598,10 +563,6 @@ ENDPROC_CFI(copy_page_asm)
*/
ENTRY_CFI(copy_user_page_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
/* Convert virtual `to' and `from' addresses to physical addresses.
Move `from' physical address to non shadowed register. */
ldil L%(__PAGE_OFFSET), %r1
@@ -750,16 +711,9 @@ ENTRY_CFI(copy_user_page_asm)
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(copy_user_page_asm)
ENTRY_CFI(clear_user_page_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
tophys_r1 %r26
ldil L%(TMPALIAS_MAP_START), %r28
@@ -836,16 +790,9 @@ ENTRY_CFI(clear_user_page_asm)
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(clear_user_page_asm)
ENTRY_CFI(flush_dcache_page_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
ldil L%(TMPALIAS_MAP_START), %r28
#ifdef CONFIG_64BIT
#if (TMPALIAS_MAP_START >= 0x80000000)
@@ -903,16 +850,9 @@ ENTRY_CFI(flush_dcache_page_asm)
sync
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(flush_dcache_page_asm)
ENTRY_CFI(flush_icache_page_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
ldil L%(TMPALIAS_MAP_START), %r28
#ifdef CONFIG_64BIT
#if (TMPALIAS_MAP_START >= 0x80000000)
@@ -977,16 +917,9 @@ ENTRY_CFI(flush_icache_page_asm)
sync
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(flush_icache_page_asm)
ENTRY_CFI(flush_kernel_dcache_page_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
ldil L%dcache_stride, %r1
ldw R%dcache_stride(%r1), %r23
@@ -1020,16 +953,9 @@ ENTRY_CFI(flush_kernel_dcache_page_asm)
sync
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(flush_kernel_dcache_page_asm)
ENTRY_CFI(purge_kernel_dcache_page_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
ldil L%dcache_stride, %r1
ldw R%dcache_stride(%r1), %r23
@@ -1062,16 +988,9 @@ ENTRY_CFI(purge_kernel_dcache_page_asm)
sync
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(purge_kernel_dcache_page_asm)
ENTRY_CFI(flush_user_dcache_range_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
ldil L%dcache_stride, %r1
ldw R%dcache_stride(%r1), %r23
ldo -1(%r23), %r21
@@ -1083,16 +1002,9 @@ ENTRY_CFI(flush_user_dcache_range_asm)
sync
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(flush_user_dcache_range_asm)
ENTRY_CFI(flush_kernel_dcache_range_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
ldil L%dcache_stride, %r1
ldw R%dcache_stride(%r1), %r23
ldo -1(%r23), %r21
@@ -1105,16 +1017,9 @@ ENTRY_CFI(flush_kernel_dcache_range_asm)
syncdma
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(flush_kernel_dcache_range_asm)
ENTRY_CFI(purge_kernel_dcache_range_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
ldil L%dcache_stride, %r1
ldw R%dcache_stride(%r1), %r23
ldo -1(%r23), %r21
@@ -1127,16 +1032,9 @@ ENTRY_CFI(purge_kernel_dcache_range_asm)
syncdma
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(purge_kernel_dcache_range_asm)
ENTRY_CFI(flush_user_icache_range_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
ldil L%icache_stride, %r1
ldw R%icache_stride(%r1), %r23
ldo -1(%r23), %r21
@@ -1148,16 +1046,9 @@ ENTRY_CFI(flush_user_icache_range_asm)
sync
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(flush_user_icache_range_asm)
ENTRY_CFI(flush_kernel_icache_page)
- .proc
- .callinfo NO_CALLS
- .entry
-
ldil L%icache_stride, %r1
ldw R%icache_stride(%r1), %r23
@@ -1191,16 +1082,9 @@ ENTRY_CFI(flush_kernel_icache_page)
sync
bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(flush_kernel_icache_page)
ENTRY_CFI(flush_kernel_icache_range_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
ldil L%icache_stride, %r1
ldw R%icache_stride(%r1), %r23
ldo -1(%r23), %r21
@@ -1212,8 +1096,6 @@ ENTRY_CFI(flush_kernel_icache_range_asm)
sync
bv %r0(%r2)
nop
- .exit
- .procend
ENDPROC_CFI(flush_kernel_icache_range_asm)
__INIT
@@ -1223,10 +1105,6 @@ ENDPROC_CFI(flush_kernel_icache_range_asm)
*/
.align 256
ENTRY_CFI(disable_sr_hashing_asm)
- .proc
- .callinfo NO_CALLS
- .entry
-
/*
* Switch to real mode
*/
@@ -1308,9 +1186,6 @@ srdis_done:
2: bv %r0(%r2)
nop
- .exit
-
- .procend
ENDPROC_CFI(disable_sr_hashing_asm)
.end
diff --git a/arch/parisc/kernel/pci-dma.c b/arch/parisc/kernel/pci-dma.c
index 6df07ce4f3c2..04c48f1ef3fb 100644
--- a/arch/parisc/kernel/pci-dma.c
+++ b/arch/parisc/kernel/pci-dma.c
@@ -21,13 +21,12 @@
#include <linux/init.h>
#include <linux/gfp.h>
#include <linux/mm.h>
-#include <linux/pci.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/string.h>
#include <linux/types.h>
-#include <linux/scatterlist.h>
-#include <linux/export.h>
+#include <linux/dma-direct.h>
+#include <linux/dma-noncoherent.h>
#include <asm/cacheflush.h>
#include <asm/dma.h> /* for DMA_CHUNK_SIZE */
@@ -395,7 +394,7 @@ pcxl_dma_init(void)
__initcall(pcxl_dma_init);
-static void *pa11_dma_alloc(struct device *dev, size_t size,
+static void *pcxl_dma_alloc(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs)
{
unsigned long vaddr;
@@ -422,190 +421,60 @@ static void *pa11_dma_alloc(struct device *dev, size_t size,
return (void *)vaddr;
}
-static void pa11_dma_free(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle, unsigned long attrs)
+static void *pcx_dma_alloc(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs)
{
- int order;
-
- order = get_order(size);
- size = 1 << (order + PAGE_SHIFT);
- unmap_uncached_pages((unsigned long)vaddr, size);
- pcxl_free_range((unsigned long)vaddr, size);
- free_pages((unsigned long)__va(dma_handle), order);
-}
+ void *addr;
-static dma_addr_t pa11_dma_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction direction, unsigned long attrs)
-{
- void *addr = page_address(page) + offset;
- BUG_ON(direction == DMA_NONE);
+ if ((attrs & DMA_ATTR_NON_CONSISTENT) == 0)
+ return NULL;
- if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- flush_kernel_dcache_range((unsigned long) addr, size);
+ addr = (void *)__get_free_pages(flag, get_order(size));
+ if (addr)
+ *dma_handle = (dma_addr_t)virt_to_phys(addr);
- return virt_to_phys(addr);
+ return addr;
}
-static void pa11_dma_unmap_page(struct device *dev, dma_addr_t dma_handle,
- size_t size, enum dma_data_direction direction,
- unsigned long attrs)
+void *arch_dma_alloc(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
{
- BUG_ON(direction == DMA_NONE);
-
- if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
- return;
- if (direction == DMA_TO_DEVICE)
- return;
-
- /*
- * For PCI_DMA_FROMDEVICE this flush is not necessary for the
- * simple map/unmap case. However, it IS necessary if if
- * pci_dma_sync_single_* has been called and the buffer reused.
- */
-
- flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle), size);
+ if (boot_cpu_data.cpu_type == pcxl2 || boot_cpu_data.cpu_type == pcxl)
+ return pcxl_dma_alloc(dev, size, dma_handle, gfp, attrs);
+ else
+ return pcx_dma_alloc(dev, size, dma_handle, gfp, attrs);
}
-static int pa11_dma_map_sg(struct device *dev, struct scatterlist *sglist,
- int nents, enum dma_data_direction direction,
- unsigned long attrs)
+void arch_dma_free(struct device *dev, size_t size, void *vaddr,
+ dma_addr_t dma_handle, unsigned long attrs)
{
- int i;
- struct scatterlist *sg;
-
- BUG_ON(direction == DMA_NONE);
+ int order = get_order(size);
- for_each_sg(sglist, sg, nents, i) {
- unsigned long vaddr = (unsigned long)sg_virt(sg);
+ if (boot_cpu_data.cpu_type == pcxl2 || boot_cpu_data.cpu_type == pcxl) {
+ size = 1 << (order + PAGE_SHIFT);
+ unmap_uncached_pages((unsigned long)vaddr, size);
+ pcxl_free_range((unsigned long)vaddr, size);
- sg_dma_address(sg) = (dma_addr_t) virt_to_phys(vaddr);
- sg_dma_len(sg) = sg->length;
-
- if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
- continue;
-
- flush_kernel_dcache_range(vaddr, sg->length);
+ vaddr = __va(dma_handle);
}
- return nents;
-}
-
-static void pa11_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
- int nents, enum dma_data_direction direction,
- unsigned long attrs)
-{
- int i;
- struct scatterlist *sg;
-
- BUG_ON(direction == DMA_NONE);
-
- if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
- return;
-
- if (direction == DMA_TO_DEVICE)
- return;
-
- /* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */
-
- for_each_sg(sglist, sg, nents, i)
- flush_kernel_vmap_range(sg_virt(sg), sg->length);
-}
-
-static void pa11_dma_sync_single_for_cpu(struct device *dev,
- dma_addr_t dma_handle, size_t size,
- enum dma_data_direction direction)
-{
- BUG_ON(direction == DMA_NONE);
-
- flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle),
- size);
-}
-
-static void pa11_dma_sync_single_for_device(struct device *dev,
- dma_addr_t dma_handle, size_t size,
- enum dma_data_direction direction)
-{
- BUG_ON(direction == DMA_NONE);
-
- flush_kernel_dcache_range((unsigned long) phys_to_virt(dma_handle),
- size);
+ free_pages((unsigned long)vaddr, get_order(size));
}
-static void pa11_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction)
+void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
+ size_t size, enum dma_data_direction dir)
{
- int i;
- struct scatterlist *sg;
-
- /* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */
-
- for_each_sg(sglist, sg, nents, i)
- flush_kernel_vmap_range(sg_virt(sg), sg->length);
+ flush_kernel_dcache_range((unsigned long)phys_to_virt(paddr), size);
}
-static void pa11_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist, int nents, enum dma_data_direction direction)
+void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
+ size_t size, enum dma_data_direction dir)
{
- int i;
- struct scatterlist *sg;
-
- /* once we do combining we'll need to use phys_to_virt(sg_dma_address(sglist)) */
-
- for_each_sg(sglist, sg, nents, i)
- flush_kernel_vmap_range(sg_virt(sg), sg->length);
+ flush_kernel_dcache_range((unsigned long)phys_to_virt(paddr), size);
}
-static void pa11_dma_cache_sync(struct device *dev, void *vaddr, size_t size,
+void arch_dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{
flush_kernel_dcache_range((unsigned long)vaddr, size);
}
-
-const struct dma_map_ops pcxl_dma_ops = {
- .alloc = pa11_dma_alloc,
- .free = pa11_dma_free,
- .map_page = pa11_dma_map_page,
- .unmap_page = pa11_dma_unmap_page,
- .map_sg = pa11_dma_map_sg,
- .unmap_sg = pa11_dma_unmap_sg,
- .sync_single_for_cpu = pa11_dma_sync_single_for_cpu,
- .sync_single_for_device = pa11_dma_sync_single_for_device,
- .sync_sg_for_cpu = pa11_dma_sync_sg_for_cpu,
- .sync_sg_for_device = pa11_dma_sync_sg_for_device,
- .cache_sync = pa11_dma_cache_sync,
-};
-
-static void *pcx_dma_alloc(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs)
-{
- void *addr;
-
- if ((attrs & DMA_ATTR_NON_CONSISTENT) == 0)
- return NULL;
-
- addr = (void *)__get_free_pages(flag, get_order(size));
- if (addr)
- *dma_handle = (dma_addr_t)virt_to_phys(addr);
-
- return addr;
-}
-
-static void pcx_dma_free(struct device *dev, size_t size, void *vaddr,
- dma_addr_t iova, unsigned long attrs)
-{
- free_pages((unsigned long)vaddr, get_order(size));
- return;
-}
-
-const struct dma_map_ops pcx_dma_ops = {
- .alloc = pcx_dma_alloc,
- .free = pcx_dma_free,
- .map_page = pa11_dma_map_page,
- .unmap_page = pa11_dma_unmap_page,
- .map_sg = pa11_dma_map_sg,
- .unmap_sg = pa11_dma_unmap_sg,
- .sync_single_for_cpu = pa11_dma_sync_single_for_cpu,
- .sync_single_for_device = pa11_dma_sync_single_for_device,
- .sync_sg_for_cpu = pa11_dma_sync_sg_for_cpu,
- .sync_sg_for_device = pa11_dma_sync_sg_for_device,
- .cache_sync = pa11_dma_cache_sync,
-};
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index b931745815e0..eb39e7e380d7 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -302,7 +302,7 @@ get_wchan(struct task_struct *p)
ip = info.ip;
if (!in_sched_functions(ip))
return ip;
- } while (count++ < 16);
+ } while (count++ < MAX_UNWIND_ENTRIES);
return 0;
}
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c
index 45cc65902fce..82bd0d0927ce 100644
--- a/arch/parisc/kernel/processor.c
+++ b/arch/parisc/kernel/processor.c
@@ -288,6 +288,8 @@ void __init collect_boot_cpu_data(void)
printk(KERN_INFO "model %s\n",
boot_cpu_data.pdc.sys_model_name);
+ dump_stack_set_arch_desc("%s", boot_cpu_data.pdc.sys_model_name);
+
boot_cpu_data.hversion = boot_cpu_data.pdc.model.hversion;
boot_cpu_data.sversion = boot_cpu_data.pdc.model.sversion;
diff --git a/arch/parisc/kernel/ptrace.c b/arch/parisc/kernel/ptrace.c
index 7aa1d4d0d444..2582df1c529b 100644
--- a/arch/parisc/kernel/ptrace.c
+++ b/arch/parisc/kernel/ptrace.c
@@ -676,3 +676,103 @@ const struct user_regset_view *task_user_regset_view(struct task_struct *task)
#endif
return &user_parisc_native_view;
}
+
+
+/* HAVE_REGS_AND_STACK_ACCESS_API feature */
+
+struct pt_regs_offset {
+ const char *name;
+ int offset;
+};
+
+#define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)}
+#define REG_OFFSET_INDEX(r,i) {.name = #r#i, .offset = offsetof(struct pt_regs, r[i])}
+#define REG_OFFSET_END {.name = NULL, .offset = 0}
+
+static const struct pt_regs_offset regoffset_table[] = {
+ REG_OFFSET_INDEX(gr,0),
+ REG_OFFSET_INDEX(gr,1),
+ REG_OFFSET_INDEX(gr,2),
+ REG_OFFSET_INDEX(gr,3),
+ REG_OFFSET_INDEX(gr,4),
+ REG_OFFSET_INDEX(gr,5),
+ REG_OFFSET_INDEX(gr,6),
+ REG_OFFSET_INDEX(gr,7),
+ REG_OFFSET_INDEX(gr,8),
+ REG_OFFSET_INDEX(gr,9),
+ REG_OFFSET_INDEX(gr,10),
+ REG_OFFSET_INDEX(gr,11),
+ REG_OFFSET_INDEX(gr,12),
+ REG_OFFSET_INDEX(gr,13),
+ REG_OFFSET_INDEX(gr,14),
+ REG_OFFSET_INDEX(gr,15),
+ REG_OFFSET_INDEX(gr,16),
+ REG_OFFSET_INDEX(gr,17),
+ REG_OFFSET_INDEX(gr,18),
+ REG_OFFSET_INDEX(gr,19),
+ REG_OFFSET_INDEX(gr,20),
+ REG_OFFSET_INDEX(gr,21),
+ REG_OFFSET_INDEX(gr,22),
+ REG_OFFSET_INDEX(gr,23),
+ REG_OFFSET_INDEX(gr,24),
+ REG_OFFSET_INDEX(gr,25),
+ REG_OFFSET_INDEX(gr,26),
+ REG_OFFSET_INDEX(gr,27),
+ REG_OFFSET_INDEX(gr,28),
+ REG_OFFSET_INDEX(gr,29),
+ REG_OFFSET_INDEX(gr,30),
+ REG_OFFSET_INDEX(gr,31),
+ REG_OFFSET_INDEX(sr,0),
+ REG_OFFSET_INDEX(sr,1),
+ REG_OFFSET_INDEX(sr,2),
+ REG_OFFSET_INDEX(sr,3),
+ REG_OFFSET_INDEX(sr,4),
+ REG_OFFSET_INDEX(sr,5),
+ REG_OFFSET_INDEX(sr,6),
+ REG_OFFSET_INDEX(sr,7),
+ REG_OFFSET_INDEX(iasq,0),
+ REG_OFFSET_INDEX(iasq,1),
+ REG_OFFSET_INDEX(iaoq,0),
+ REG_OFFSET_INDEX(iaoq,1),
+ REG_OFFSET_NAME(cr27),
+ REG_OFFSET_NAME(ksp),
+ REG_OFFSET_NAME(kpc),
+ REG_OFFSET_NAME(sar),
+ REG_OFFSET_NAME(iir),
+ REG_OFFSET_NAME(isr),
+ REG_OFFSET_NAME(ior),
+ REG_OFFSET_NAME(ipsw),
+ REG_OFFSET_END,
+};
+
+/**
+ * regs_query_register_offset() - query register offset from its name
+ * @name: the name of a register
+ *
+ * regs_query_register_offset() returns the offset of a register in struct
+ * pt_regs from its name. If the name is invalid, this returns -EINVAL;
+ */
+int regs_query_register_offset(const char *name)
+{
+ const struct pt_regs_offset *roff;
+ for (roff = regoffset_table; roff->name != NULL; roff++)
+ if (!strcmp(roff->name, name))
+ return roff->offset;
+ return -EINVAL;
+}
+
+/**
+ * regs_query_register_name() - query register name from its offset
+ * @offset: the offset of a register in struct pt_regs.
+ *
+ * regs_query_register_name() returns the name of a register from its
+ * offset in struct pt_regs. If the @offset is invalid, this returns NULL;
+ */
+const char *regs_query_register_name(unsigned int offset)
+{
+ const struct pt_regs_offset *roff;
+ for (roff = regoffset_table; roff->name != NULL; roff++)
+ if (roff->offset == offset)
+ return roff->name;
+ return NULL;
+}
diff --git a/arch/parisc/kernel/real2.S b/arch/parisc/kernel/real2.S
index cc9963421a19..2b16d8d6598f 100644
--- a/arch/parisc/kernel/real2.S
+++ b/arch/parisc/kernel/real2.S
@@ -35,12 +35,6 @@ real32_stack:
real64_stack:
.block 8192
-#ifdef CONFIG_64BIT
-# define REG_SZ 8
-#else
-# define REG_SZ 4
-#endif
-
#define N_SAVED_REGS 9
save_cr_space:
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index 8d3a7b80ac42..4e87c35c22b7 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -97,14 +97,12 @@ void __init dma_ops_init(void)
panic( "PA-RISC Linux currently only supports machines that conform to\n"
"the PA-RISC 1.1 or 2.0 architecture specification.\n");
- case pcxs:
- case pcxt:
- hppa_dma_ops = &pcx_dma_ops;
- break;
case pcxl2:
pa7300lc_init();
case pcxl: /* falls through */
- hppa_dma_ops = &pcxl_dma_ops;
+ case pcxs:
+ case pcxt:
+ hppa_dma_ops = &dma_noncoherent_ops;
break;
default:
break;
diff --git a/arch/parisc/kernel/stacktrace.c b/arch/parisc/kernel/stacktrace.c
index 2fe914c5f533..ec5835e83a7a 100644
--- a/arch/parisc/kernel/stacktrace.c
+++ b/arch/parisc/kernel/stacktrace.c
@@ -16,20 +16,7 @@ static void dump_trace(struct task_struct *task, struct stack_trace *trace)
{
struct unwind_frame_info info;
- /* initialize unwind info */
- if (task == current) {
- unsigned long sp;
- struct pt_regs r;
-HERE:
- asm volatile ("copy %%r30, %0" : "=r"(sp));
- memset(&r, 0, sizeof(struct pt_regs));
- r.iaoq[0] = (unsigned long)&&HERE;
- r.gr[2] = (unsigned long)__builtin_return_address(0);
- r.gr[30] = sp;
- unwind_frame_init(&info, task, &r);
- } else {
- unwind_frame_init_from_blocked_task(&info, task);
- }
+ unwind_frame_init_task(&info, task, NULL);
/* unwind stack and save entries in stack_trace struct */
trace->nr_entries = 0;
diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
index 43b308cfdf53..376ea0d1b275 100644
--- a/arch/parisc/kernel/sys_parisc.c
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -156,11 +156,6 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
int do_color_align, last_mmap;
struct vm_unmapped_area_info info;
-#ifdef CONFIG_64BIT
- /* This should only ever run for 32-bit processes. */
- BUG_ON(!test_thread_flag(TIF_32BIT));
-#endif
-
/* requested length too big for entire address space */
if (len > TASK_SIZE)
return -ENOMEM;
diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index 4886a6db42e9..f453997a7b8f 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -108,12 +108,8 @@ linux_gateway_entry:
mtsp %r0,%sr6 /* get kernel space into sr6 */
#ifdef CONFIG_64BIT
- /* for now we can *always* set the W bit on entry to the syscall
- * since we don't support wide userland processes. We could
- * also save the current SM other than in r0 and restore it on
- * exit from the syscall, and also use that value to know
- * whether to do narrow or wide syscalls. -PB
- */
+ /* Store W bit on entry to the syscall in case it's a wide userland
+ * process. */
ssm PSW_SM_W, %r1
extrd,u %r1,PSW_W_BIT,1,%r1
/* sp must be aligned on 4, so deposit the W bit setting into
@@ -227,8 +223,7 @@ linux_gateway_entry:
or,= %r2,%r2,%r2
ldo R%sys_call_table64(%r1), %r19
#else
- ldil L%sys_call_table, %r1
- ldo R%sys_call_table(%r1), %r19
+ load32 sys_call_table, %r19
#endif
comiclr,>> __NR_Linux_syscalls, %r20, %r0
b,n .Lsyscall_nosys
@@ -331,8 +326,6 @@ tracesys_next:
* task->thread.regs.gr[20] above.
*/
copy %ret0,%r20
- ldil L%sys_call_table,%r1
- ldo R%sys_call_table(%r1), %r19
ldo -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 /* get task ptr */
LDREG TI_TASK(%r1), %r1
@@ -354,6 +347,23 @@ tracesys_next:
comiclr,>> __NR_Linux_syscalls, %r20, %r0
b,n .Ltracesys_nosys
+ /* Note! We cannot use the syscall table that is mapped
+ nearby since the gateway page is mapped execute-only. */
+
+#ifdef CONFIG_64BIT
+ LDREG TASK_PT_GR30(%r1), %r19 /* get users sp back */
+ extrd,u %r19,63,1,%r2 /* W hidden in bottom bit */
+
+ ldil L%sys_call_table, %r1
+ or,= %r2,%r2,%r2
+ addil L%(sys_call_table64-sys_call_table), %r1
+ ldo R%sys_call_table(%r1), %r19
+ or,= %r2,%r2,%r2
+ ldo R%sys_call_table64(%r1), %r19
+#else
+ load32 sys_call_table, %r19
+#endif
+
LDREGX %r20(%r19), %r19
/* If this is a sys_rt_sigreturn call, and the signal was received
@@ -464,16 +474,13 @@ tracesys_sigexit:
lws_start:
#ifdef CONFIG_64BIT
- /* FIXME: If we are a 64-bit kernel just
- * turn this on unconditionally.
- */
ssm PSW_SM_W, %r1
extrd,u %r1,PSW_W_BIT,1,%r1
/* sp must be aligned on 4, so deposit the W bit setting into
* the bottom of sp temporarily */
or,ev %r1,%r30,%r30
- /* Clip LWS number to a 32-bit value always */
+ /* Clip LWS number to a 32-bit value for 32-bit processes */
depdi 0, 31, 32, %r20
#endif
@@ -629,12 +636,12 @@ cas_action:
stw %r1, 4(%sr2,%r20)
#endif
/* The load and store could fail */
-1: ldw,ma 0(%r26), %r28
+1: ldw 0(%r26), %r28
sub,<> %r28, %r25, %r0
-2: stw,ma %r24, 0(%r26)
+2: stw %r24, 0(%r26)
/* Free lock */
sync
- stw,ma %r20, 0(%sr2,%r20)
+ stw %r20, 0(%sr2,%r20)
#if ENABLE_LWS_DEBUG
/* Clear thread register indicator */
stw %r0, 4(%sr2,%r20)
@@ -798,30 +805,30 @@ cas2_action:
ldo 1(%r0),%r28
/* 8bit CAS */
-13: ldb,ma 0(%r26), %r29
+13: ldb 0(%r26), %r29
sub,= %r29, %r25, %r0
b,n cas2_end
-14: stb,ma %r24, 0(%r26)
+14: stb %r24, 0(%r26)
b cas2_end
copy %r0, %r28
nop
nop
/* 16bit CAS */
-15: ldh,ma 0(%r26), %r29
+15: ldh 0(%r26), %r29
sub,= %r29, %r25, %r0
b,n cas2_end
-16: sth,ma %r24, 0(%r26)
+16: sth %r24, 0(%r26)
b cas2_end
copy %r0, %r28
nop
nop
/* 32bit CAS */
-17: ldw,ma 0(%r26), %r29
+17: ldw 0(%r26), %r29
sub,= %r29, %r25, %r0
b,n cas2_end
-18: stw,ma %r24, 0(%r26)
+18: stw %r24, 0(%r26)
b cas2_end
copy %r0, %r28
nop
@@ -829,10 +836,10 @@ cas2_action:
/* 64bit CAS */
#ifdef CONFIG_64BIT
-19: ldd,ma 0(%r26), %r29
+19: ldd 0(%r26), %r29
sub,*= %r29, %r25, %r0
b,n cas2_end
-20: std,ma %r24, 0(%r26)
+20: std %r24, 0(%r26)
copy %r0, %r28
#else
/* Compare first word */
@@ -851,7 +858,7 @@ cas2_action:
cas2_end:
/* Free lock */
sync
- stw,ma %r20, 0(%sr2,%r20)
+ stw %r20, 0(%sr2,%r20)
/* Enable interrupts */
ssm PSW_SM_I, %r0
/* Return to userspace, set no error */
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index 4309ad31a874..68f10f87073d 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -45,7 +45,7 @@
#include "../math-emu/math-emu.h" /* for handle_fpe() */
-static void parisc_show_stack(struct task_struct *task, unsigned long *sp,
+static void parisc_show_stack(struct task_struct *task,
struct pt_regs *regs);
static int printbinary(char *buf, unsigned long x, int nbits)
@@ -152,7 +152,7 @@ void show_regs(struct pt_regs *regs)
printk("%s IAOQ[1]: %pS\n", level, (void *) regs->iaoq[1]);
printk("%s RP(r2): %pS\n", level, (void *) regs->gr[2]);
- parisc_show_stack(current, NULL, regs);
+ parisc_show_stack(current, regs);
}
}
@@ -172,7 +172,7 @@ static void do_show_stack(struct unwind_frame_info *info)
int i = 1;
printk(KERN_CRIT "Backtrace:\n");
- while (i <= 16) {
+ while (i <= MAX_UNWIND_ENTRIES) {
if (unwind_once(info) < 0 || info->ip == 0)
break;
@@ -185,44 +185,19 @@ static void do_show_stack(struct unwind_frame_info *info)
printk(KERN_CRIT "\n");
}
-static void parisc_show_stack(struct task_struct *task, unsigned long *sp,
+static void parisc_show_stack(struct task_struct *task,
struct pt_regs *regs)
{
struct unwind_frame_info info;
- struct task_struct *t;
- t = task ? task : current;
- if (regs) {
- unwind_frame_init(&info, t, regs);
- goto show_stack;
- }
-
- if (t == current) {
- unsigned long sp;
-
-HERE:
- asm volatile ("copy %%r30, %0" : "=r"(sp));
- {
- struct pt_regs r;
-
- memset(&r, 0, sizeof(struct pt_regs));
- r.iaoq[0] = (unsigned long)&&HERE;
- r.gr[2] = (unsigned long)__builtin_return_address(0);
- r.gr[30] = sp;
-
- unwind_frame_init(&info, current, &r);
- }
- } else {
- unwind_frame_init_from_blocked_task(&info, t);
- }
+ unwind_frame_init_task(&info, task, regs);
-show_stack:
do_show_stack(&info);
}
void show_stack(struct task_struct *t, unsigned long *sp)
{
- return parisc_show_stack(t, sp, NULL);
+ parisc_show_stack(t, NULL);
}
int is_valid_bugaddr(unsigned long iaoq)
@@ -557,7 +532,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
cpu_lpmc(5, regs);
return;
- case 6:
+ case PARISC_ITLB_TRAP:
/* Instruction TLB miss fault/Instruction page fault */
fault_address = regs->iaoq[0];
fault_space = regs->iasq[0];
diff --git a/arch/parisc/kernel/unwind.c b/arch/parisc/kernel/unwind.c
index 2ef83d78eec4..f329b466e68f 100644
--- a/arch/parisc/kernel/unwind.c
+++ b/arch/parisc/kernel/unwind.c
@@ -13,7 +13,6 @@
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/slab.h>
-#include <linux/kallsyms.h>
#include <linux/sort.h>
#include <linux/uaccess.h>
@@ -117,7 +116,8 @@ unwind_table_init(struct unwind_table *table, const char *name,
for (; start <= end; start++) {
if (start < end &&
start->region_end > (start+1)->region_start) {
- printk("WARNING: Out of order unwind entry! %p and %p\n", start, start+1);
+ pr_warn("Out of order unwind entry! %px and %px\n",
+ start, start+1);
}
start->region_start += base_addr;
@@ -203,26 +203,63 @@ int __init unwind_init(void)
return 0;
}
-#ifdef CONFIG_64BIT
-#define get_func_addr(fptr) fptr[2]
-#else
-#define get_func_addr(fptr) fptr[0]
-#endif
-
static int unwind_special(struct unwind_frame_info *info, unsigned long pc, int frame_size)
{
- extern void handle_interruption(int, struct pt_regs *);
- static unsigned long *hi = (unsigned long *)&handle_interruption;
-
- if (pc == get_func_addr(hi)) {
+ /*
+ * We have to use void * instead of a function pointer, because
+ * function pointers aren't a pointer to the function on 64-bit.
+ * Make them const so the compiler knows they live in .text
+ * Note: We could use dereference_kernel_function_descriptor()
+ * instead but we want to keep it simple here.
+ */
+ extern void * const handle_interruption;
+ extern void * const ret_from_kernel_thread;
+ extern void * const syscall_exit;
+ extern void * const intr_return;
+ extern void * const _switch_to_ret;
+#ifdef CONFIG_IRQSTACKS
+ extern void * const _call_on_stack;
+#endif /* CONFIG_IRQSTACKS */
+
+ if (pc == (unsigned long) &handle_interruption) {
struct pt_regs *regs = (struct pt_regs *)(info->sp - frame_size - PT_SZ_ALGN);
dbg("Unwinding through handle_interruption()\n");
info->prev_sp = regs->gr[30];
info->prev_ip = regs->iaoq[0];
+ return 1;
+ }
+
+ if (pc == (unsigned long) &ret_from_kernel_thread ||
+ pc == (unsigned long) &syscall_exit) {
+ info->prev_sp = info->prev_ip = 0;
+ return 1;
+ }
+
+ if (pc == (unsigned long) &intr_return) {
+ struct pt_regs *regs;
+
+ dbg("Found intr_return()\n");
+ regs = (struct pt_regs *)(info->sp - PT_SZ_ALGN);
+ info->prev_sp = regs->gr[30];
+ info->prev_ip = regs->iaoq[0];
+ info->rp = regs->gr[2];
+ return 1;
+ }
+ if (pc == (unsigned long) &_switch_to_ret) {
+ info->prev_sp = info->sp - CALLEE_SAVE_FRAME_SIZE;
+ info->prev_ip = *(unsigned long *)(info->prev_sp - RP_OFFSET);
return 1;
}
+#ifdef CONFIG_IRQSTACKS
+ if (pc == (unsigned long) &_call_on_stack) {
+ info->prev_sp = *(unsigned long *)(info->sp - FRAME_SIZE - REG_SZ);
+ info->prev_ip = *(unsigned long *)(info->sp - FRAME_SIZE - RP_OFFSET);
+ return 1;
+ }
+#endif
+
return 0;
}
@@ -238,34 +275,8 @@ static void unwind_frame_regs(struct unwind_frame_info *info)
if (e == NULL) {
unsigned long sp;
- dbg("Cannot find unwind entry for 0x%lx; forced unwinding\n", info->ip);
-
-#ifdef CONFIG_KALLSYMS
- /* Handle some frequent special cases.... */
- {
- char symname[KSYM_NAME_LEN];
- char *modname;
-
- kallsyms_lookup(info->ip, NULL, NULL, &modname,
- symname);
-
- dbg("info->ip = 0x%lx, name = %s\n", info->ip, symname);
-
- if (strcmp(symname, "_switch_to_ret") == 0) {
- info->prev_sp = info->sp - CALLEE_SAVE_FRAME_SIZE;
- info->prev_ip = *(unsigned long *)(info->prev_sp - RP_OFFSET);
- dbg("_switch_to_ret @ %lx - setting "
- "prev_sp=%lx prev_ip=%lx\n",
- info->ip, info->prev_sp,
- info->prev_ip);
- return;
- } else if (strcmp(symname, "ret_from_kernel_thread") == 0 ||
- strcmp(symname, "syscall_exit") == 0) {
- info->prev_ip = info->prev_sp = 0;
- return;
- }
- }
-#endif
+ dbg("Cannot find unwind entry for %pS; forced unwinding\n",
+ (void *) info->ip);
/* Since we are doing the unwinding blind, we don't know if
we are adjusting the stack correctly or extracting the rp
@@ -394,9 +405,31 @@ void unwind_frame_init_from_blocked_task(struct unwind_frame_info *info, struct
kfree(r2);
}
-void unwind_frame_init_running(struct unwind_frame_info *info, struct pt_regs *regs)
+#define get_parisc_stackpointer() ({ \
+ unsigned long sp; \
+ __asm__("copy %%r30, %0" : "=r"(sp)); \
+ (sp); \
+})
+
+void unwind_frame_init_task(struct unwind_frame_info *info,
+ struct task_struct *task, struct pt_regs *regs)
{
- unwind_frame_init(info, current, regs);
+ task = task ? task : current;
+
+ if (task == current) {
+ struct pt_regs r;
+
+ if (!regs) {
+ memset(&r, 0, sizeof(r));
+ r.iaoq[0] = _THIS_IP_;
+ r.gr[2] = _RET_IP_;
+ r.gr[30] = get_parisc_stackpointer();
+ regs = &r;
+ }
+ unwind_frame_init(info, task, &r);
+ } else {
+ unwind_frame_init_from_blocked_task(info, task);
+ }
}
int unwind_once(struct unwind_frame_info *next_frame)
@@ -433,19 +466,12 @@ int unwind_to_user(struct unwind_frame_info *info)
unsigned long return_address(unsigned int level)
{
struct unwind_frame_info info;
- struct pt_regs r;
- unsigned long sp;
/* initialize unwind info */
- asm volatile ("copy %%r30, %0" : "=r"(sp));
- memset(&r, 0, sizeof(struct pt_regs));
- r.iaoq[0] = (unsigned long) current_text_addr();
- r.gr[2] = (unsigned long) __builtin_return_address(0);
- r.gr[30] = sp;
- unwind_frame_init(&info, current, &r);
+ unwind_frame_init_task(&info, current, NULL);
/* unwind stack */
- ++level;
+ level += 2;
do {
if (unwind_once(&info) < 0 || info.ip == 0)
return 0;
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-12 20:26:06 +0300