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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6

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* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6:
  agp: parisc-agp.c - use correct page_mask function
  parisc: Fix linker script breakage.
  parisc: convert to asm-generic/hardirq.h
  parisc: Make THREAD_SIZE available to assembly files and linker scripts.
  parisc: correct use of SHF_ALLOC
  parisc: rename parisc's vmalloc_start to parisc_vmalloc_start
  parisc: add me to Maintainers
  parisc: includecheck fix: signal.c
  parisc: HAVE_ARCH_TRACEHOOK
  parisc: add skeleton syscall.h
  parisc: stop using task->ptrace for {single,block}step flags
  parisc: split syscall_trace into two halves
  parisc: add missing TI_TASK macro in syscall.S
  parisc: tracehook_signal_handler
  parisc: tracehook_report_syscall
This commit is contained in:
Linus Torvalds 2009-10-08 07:40:19 -07:00
commit 385c51d6b1
17 changed files with 129 additions and 82 deletions
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1
MAINTAINERS
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@ -3973,6 +3973,7 @@ F: drivers/block/paride/
PARISC ARCHITECTURE
M: Kyle McMartin <kyle@mcmartin.ca>
M: Helge Deller <deller@gmx.de>
M: "James E.J. Bottomley" <jejb@parisc-linux.org>
L: linux-parisc@vger.kernel.org
W: http://www.parisc-linux.org/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/kyle/parisc-2.6.git

1
arch/parisc/Kconfig
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@ -18,6 +18,7 @@ config PARISC
select BUG
select HAVE_PERF_EVENTS
select GENERIC_ATOMIC64 if !64BIT
select HAVE_ARCH_TRACEHOOK
help
The PA-RISC microprocessor is designed by Hewlett-Packard and used
in many of their workstations & servers (HP9000 700 and 800 series,

4
arch/parisc/include/asm/fixmap.h
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@ -21,9 +21,9 @@
#define KERNEL_MAP_END (TMPALIAS_MAP_START)
#ifndef __ASSEMBLY__
extern void *vmalloc_start;
extern void *parisc_vmalloc_start;
#define PCXL_DMA_MAP_SIZE (8*1024*1024)
#define VMALLOC_START ((unsigned long)vmalloc_start)
#define VMALLOC_START ((unsigned long)parisc_vmalloc_start)
#define VMALLOC_END (KERNEL_MAP_END)
#endif /*__ASSEMBLY__*/

20
arch/parisc/include/asm/hardirq.h
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@ -1,29 +1,11 @@
/* hardirq.h: PA-RISC hard IRQ support.
*
* Copyright (C) 2001 Matthew Wilcox <matthew@wil.cx>
*
* The locking is really quite interesting. There's a cpu-local
* count of how many interrupts are being handled, and a global
* lock. An interrupt can only be serviced if the global lock
* is free. You can't be sure no more interrupts are being
* serviced until you've acquired the lock and then checked
* all the per-cpu interrupt counts are all zero. It's a specialised
* br_lock, and that's exactly how Sparc does it. We don't because
* it's more locking for us. This way is lock-free in the interrupt path.
*/
#ifndef _PARISC_HARDIRQ_H
#define _PARISC_HARDIRQ_H
#include <linux/threads.h>
#include <linux/irq.h>
typedef struct {
unsigned long __softirq_pending; /* set_bit is used on this */
} ____cacheline_aligned irq_cpustat_t;
#include <linux/irq_cpustat.h> /* Standard mappings for irq_cpustat_t above */
void ack_bad_irq(unsigned int irq);
#include <asm-generic/hardirq.h>
#endif /* _PARISC_HARDIRQ_H */

5
arch/parisc/include/asm/ptrace.h
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@ -59,8 +59,11 @@ void user_enable_block_step(struct task_struct *task);
#define user_mode(regs) (((regs)->iaoq[0] & 3) ? 1 : 0)
#define user_space(regs) (((regs)->iasq[1] != 0) ? 1 : 0)
#define instruction_pointer(regs) ((regs)->iaoq[0] & ~3)
#define user_stack_pointer(regs) ((regs)->gr[30])
unsigned long profile_pc(struct pt_regs *);
extern void show_regs(struct pt_regs *);
#endif
#endif /* __KERNEL__ */
#endif

40
arch/parisc/include/asm/syscall.h Normal file
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@ -0,0 +1,40 @@
/* syscall.h */
#ifndef _ASM_PARISC_SYSCALL_H_
#define _ASM_PARISC_SYSCALL_H_
#include <linux/err.h>
#include <asm/ptrace.h>
static inline long syscall_get_nr(struct task_struct *tsk,
struct pt_regs *regs)
{
return regs->gr[20];
}
static inline void syscall_get_arguments(struct task_struct *tsk,
struct pt_regs *regs, unsigned int i,
unsigned int n, unsigned long *args)
{
BUG_ON(i);
switch (n) {
case 6:
args[5] = regs->gr[21];
case 5:
args[4] = regs->gr[22];
case 4:
args[3] = regs->gr[23];
case 3:
args[2] = regs->gr[24];
case 2:
args[1] = regs->gr[25];
case 1:
args[0] = regs->gr[26];
break;
default:
BUG();
}
}
#endif /*_ASM_PARISC_SYSCALL_H_*/

14
arch/parisc/include/asm/thread_info.h
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@ -32,6 +32,11 @@ struct thread_info {
#define init_thread_info (init_thread_union.thread_info)
#define init_stack (init_thread_union.stack)
/* how to get the thread information struct from C */
#define current_thread_info() ((struct thread_info *)mfctl(30))
#endif /* !__ASSEMBLY */
/* thread information allocation */
#define THREAD_SIZE_ORDER 2
@ -40,11 +45,6 @@ struct thread_info {
#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
#define THREAD_SHIFT (PAGE_SHIFT + THREAD_SIZE_ORDER)
/* how to get the thread information struct from C */
#define current_thread_info() ((struct thread_info *)mfctl(30))
#endif /* !__ASSEMBLY */
#define PREEMPT_ACTIVE_BIT 28
#define PREEMPT_ACTIVE (1 << PREEMPT_ACTIVE_BIT)
@ -60,6 +60,8 @@ struct thread_info {
#define TIF_RESTORE_SIGMASK 6 /* restore saved signal mask */
#define TIF_FREEZE 7 /* is freezing for suspend */
#define TIF_NOTIFY_RESUME 8 /* callback before returning to user */
#define TIF_SINGLESTEP 9 /* single stepping? */
#define TIF_BLOCKSTEP 10 /* branch stepping? */
#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
@ -69,6 +71,8 @@ struct thread_info {
#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
#define _TIF_FREEZE (1 << TIF_FREEZE)
#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_BLOCKSTEP (1 << TIF_BLOCKSTEP)
#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | \
_TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)

4
arch/parisc/kernel/asm-offsets.c
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@ -270,8 +270,8 @@ int main(void)
DEFINE(DTLB_OFF_COUNT, offsetof(struct pdc_cache_info, dt_off_count));
DEFINE(DTLB_LOOP, offsetof(struct pdc_cache_info, dt_loop));
BLANK();
DEFINE(PA_BLOCKSTEP_BIT, 31-PT_BLOCKSTEP_BIT);
DEFINE(PA_SINGLESTEP_BIT, 31-PT_SINGLESTEP_BIT);
DEFINE(TIF_BLOCKSTEP_PA_BIT, 31-TIF_BLOCKSTEP);
DEFINE(TIF_SINGLESTEP_PA_BIT, 31-TIF_SINGLESTEP);
BLANK();
DEFINE(ASM_PMD_SHIFT, PMD_SHIFT);
DEFINE(ASM_PGDIR_SHIFT, PGDIR_SHIFT);

21
arch/parisc/kernel/entry.S
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@ -2047,12 +2047,13 @@ syscall_do_signal:
b,n syscall_check_sig
syscall_restore:
/* Are we being ptraced? */
LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1
ldw TASK_PTRACE(%r1), %r19
bb,< %r19,31,syscall_restore_rfi
nop
/* Are we being ptraced? */
ldw TASK_FLAGS(%r1),%r19
ldi (_TIF_SINGLESTEP|_TIF_BLOCKSTEP),%r2
and,COND(=) %r19,%r2,%r0
b,n syscall_restore_rfi
ldo TASK_PT_FR31(%r1),%r19 /* reload fpregs */
rest_fp %r19
@ -2113,16 +2114,16 @@ syscall_restore_rfi:
ldi 0x0b,%r20 /* Create new PSW */
depi -1,13,1,%r20 /* C, Q, D, and I bits */
/* The values of PA_SINGLESTEP_BIT and PA_BLOCKSTEP_BIT are
* set in include/linux/ptrace.h and converted to PA bitmap
/* The values of SINGLESTEP_BIT and BLOCKSTEP_BIT are
* set in thread_info.h and converted to PA bitmap
* numbers in asm-offsets.c */
/* if ((%r19.PA_SINGLESTEP_BIT)) { %r20.27=1} */
extru,= %r19,PA_SINGLESTEP_BIT,1,%r0
/* if ((%r19.SINGLESTEP_BIT)) { %r20.27=1} */
extru,= %r19,TIF_SINGLESTEP_PA_BIT,1,%r0
depi -1,27,1,%r20 /* R bit */
/* if ((%r19.PA_BLOCKSTEP_BIT)) { %r20.7=1} */
extru,= %r19,PA_BLOCKSTEP_BIT,1,%r0
/* if ((%r19.BLOCKSTEP_BIT)) { %r20.7=1} */
extru,= %r19,TIF_BLOCKSTEP_PA_BIT,1,%r0
depi -1,7,1,%r20 /* T bit */
STREG %r20,TASK_PT_PSW(%r1)

5
arch/parisc/kernel/irq.c
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@ -423,8 +423,3 @@ void __init init_IRQ(void)
set_eiem(cpu_eiem); /* EIEM : enable all external intr */
}
void ack_bad_irq(unsigned int irq)
{
printk(KERN_WARNING "unexpected IRQ %d\n", irq);
}

2
arch/parisc/kernel/module.c
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@ -893,7 +893,7 @@ int module_finalize(const Elf_Ehdr *hdr,
* ourselves */
for (i = 1; i < hdr->e_shnum; i++) {
if(sechdrs[i].sh_type == SHT_SYMTAB
&& (sechdrs[i].sh_type & SHF_ALLOC)) {
&& (sechdrs[i].sh_flags & SHF_ALLOC)) {
int strindex = sechdrs[i].sh_link;
/* FIXME: AWFUL HACK
* The cast is to drop the const from

44
arch/parisc/kernel/ptrace.c
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@ -13,6 +13,7 @@
#include <linux/smp.h>
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/tracehook.h>
#include <linux/user.h>
#include <linux/personality.h>
#include <linux/security.h>
@ -35,7 +36,8 @@
*/
void ptrace_disable(struct task_struct *task)
{
task->ptrace &= ~(PT_SINGLESTEP|PT_BLOCKSTEP);
clear_tsk_thread_flag(task, TIF_SINGLESTEP);
clear_tsk_thread_flag(task, TIF_BLOCKSTEP);
/* make sure the trap bits are not set */
pa_psw(task)->r = 0;
@ -55,8 +57,8 @@ void user_disable_single_step(struct task_struct *task)
void user_enable_single_step(struct task_struct *task)
{
task->ptrace &= ~PT_BLOCKSTEP;
task->ptrace |= PT_SINGLESTEP;
clear_tsk_thread_flag(task, TIF_BLOCKSTEP);
set_tsk_thread_flag(task, TIF_SINGLESTEP);
if (pa_psw(task)->n) {
struct siginfo si;
@ -98,8 +100,8 @@ void user_enable_single_step(struct task_struct *task)
void user_enable_block_step(struct task_struct *task)
{
task->ptrace &= ~PT_SINGLESTEP;
task->ptrace |= PT_BLOCKSTEP;
clear_tsk_thread_flag(task, TIF_SINGLESTEP);
set_tsk_thread_flag(task, TIF_BLOCKSTEP);
/* Enable taken branch trap. */
pa_psw(task)->r = 0;
@ -263,22 +265,20 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
}
#endif
void syscall_trace(void)
long do_syscall_trace_enter(struct pt_regs *regs)
{
if (!test_thread_flag(TIF_SYSCALL_TRACE))
return;
if (!(current->ptrace & PT_PTRACED))
return;
ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
? 0x80 : 0));
/*
* this isn't the same as continuing with a signal, but it will do
* for normal use. strace only continues with a signal if the
* stopping signal is not SIGTRAP. -brl
*/
if (current->exit_code) {
send_sig(current->exit_code, current, 1);
current->exit_code = 0;
}
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
tracehook_report_syscall_entry(regs))
return -1L;
return regs->gr[20];
}
void do_syscall_trace_exit(struct pt_regs *regs)
{
int stepping = test_thread_flag(TIF_SINGLESTEP) ||
test_thread_flag(TIF_BLOCKSTEP);
if (stepping || test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(regs, stepping);
}

5
arch/parisc/kernel/signal.c
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@ -21,6 +21,7 @@
#include <linux/errno.h>
#include <linux/wait.h>
#include <linux/ptrace.h>
#include <linux/tracehook.h>
#include <linux/unistd.h>
#include <linux/stddef.h>
#include <linux/compat.h>
@ -34,7 +35,6 @@
#include <asm/asm-offsets.h>
#ifdef CONFIG_COMPAT
#include <linux/compat.h>
#include "signal32.h"
#endif
@ -468,6 +468,9 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
sigaddset(&current->blocked,sig);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
tracehook_signal_handler(sig, info, ka, regs, 0);
return 1;
}

22
arch/parisc/kernel/syscall.S
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@ -288,18 +288,23 @@ tracesys:
STREG %r18,PT_GR18(%r2)
/* Finished saving things for the debugger */
ldil L%syscall_trace,%r1
copy %r2,%r26
ldil L%do_syscall_trace_enter,%r1
ldil L%tracesys_next,%r2
be R%syscall_trace(%sr7,%r1)
be R%do_syscall_trace_enter(%sr7,%r1)
ldo R%tracesys_next(%r2),%r2
tracesys_next:
tracesys_next:
/* do_syscall_trace_enter either returned the syscallno, or -1L,
* so we skip restoring the PT_GR20 below, since we pulled it from
* 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
LDREG TASK_PT_GR20(%r1), %r20
LDREG TASK_PT_GR26(%r1), %r26 /* Restore the users args */
LDREG TASK_PT_GR25(%r1), %r25
LDREG TASK_PT_GR24(%r1), %r24
@ -336,7 +341,8 @@ tracesys_exit:
#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
bl syscall_trace, %r2
ldo TASK_REGS(%r1),%r26
bl do_syscall_trace_exit,%r2
STREG %r28,TASK_PT_GR28(%r1) /* save return value now */
ldo -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 /* get task ptr */
LDREG TI_TASK(%r1), %r1
@ -353,12 +359,12 @@ tracesys_exit:
tracesys_sigexit:
ldo -THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 /* get task ptr */
LDREG 0(%r1), %r1
LDREG TI_TASK(%r1), %r1
#ifdef CONFIG_64BIT
ldo -16(%r30),%r29 /* Reference param save area */
#endif
bl syscall_trace, %r2
nop
bl do_syscall_trace_exit,%r2
ldo TASK_REGS(%r1),%r26
ldil L%syscall_exit_rfi,%r1
be,n R%syscall_exit_rfi(%sr7,%r1)

10
arch/parisc/kernel/vmlinux.lds.S
View File

@ -28,6 +28,7 @@
#include <asm/cache.h>
#include <asm/page.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
/* ld script to make hppa Linux kernel */
#ifndef CONFIG_64BIT
@ -134,6 +135,15 @@ SECTIONS
__init_begin = .;
INIT_TEXT_SECTION(16384)
INIT_DATA_SECTION(16)
/* we have to discard exit text and such at runtime, not link time */
.exit.text :
{
EXIT_TEXT
}
.exit.data :
{
EXIT_DATA
}
PERCPU(PAGE_SIZE)
. = ALIGN(PAGE_SIZE);

11
arch/parisc/mm/init.c
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@ -434,8 +434,8 @@ void mark_rodata_ro(void)
#define SET_MAP_OFFSET(x) ((void *)(((unsigned long)(x) + VM_MAP_OFFSET) \
& ~(VM_MAP_OFFSET-1)))
void *vmalloc_start __read_mostly;
EXPORT_SYMBOL(vmalloc_start);
void *parisc_vmalloc_start __read_mostly;
EXPORT_SYMBOL(parisc_vmalloc_start);
#ifdef CONFIG_PA11
unsigned long pcxl_dma_start __read_mostly;
@ -496,13 +496,14 @@ void __init mem_init(void)
#ifdef CONFIG_PA11
if (hppa_dma_ops == &pcxl_dma_ops) {
pcxl_dma_start = (unsigned long)SET_MAP_OFFSET(MAP_START);
vmalloc_start = SET_MAP_OFFSET(pcxl_dma_start + PCXL_DMA_MAP_SIZE);
parisc_vmalloc_start = SET_MAP_OFFSET(pcxl_dma_start
+ PCXL_DMA_MAP_SIZE);
} else {
pcxl_dma_start = 0;
vmalloc_start = SET_MAP_OFFSET(MAP_START);
parisc_vmalloc_start = SET_MAP_OFFSET(MAP_START);
}
#else
vmalloc_start = SET_MAP_OFFSET(MAP_START);
parisc_vmalloc_start = SET_MAP_OFFSET(MAP_START);
#endif
printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, %dk init)\n",

2
drivers/char/agp/parisc-agp.c
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@ -217,7 +217,7 @@ static const struct agp_bridge_driver parisc_agp_driver = {
.configure = parisc_agp_configure,
.fetch_size = parisc_agp_fetch_size,
.tlb_flush = parisc_agp_tlbflush,
.mask_memory = parisc_agp_page_mask_memory,
.mask_memory = parisc_agp_mask_memory,
.masks = parisc_agp_masks,
.agp_enable = parisc_agp_enable,
.cache_flush = global_cache_flush,