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parisc architecture updates for kernel v5.18-rc1

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- add vDSO support (allows us to use read-only stacks)
 - many TLB and cache flush optimizations (by Dave Anglin)
 - fix handling of probe non-access faults (by Dave Anglin)
 - fix invalidate/flush vmap routines (by Dave Anglin)
 - avoid using hardware single-step in kprobes
 - enable ARCH_HAS_DEBUG_VM_PGTABLE
 - many cleanups in unaligned handlers, e.g. rewrite of existing assembly code
 - always use the self-extracting kernel feature
 - big refacturing and code reductions regarding space-register usage in get_user() and put_user()
 - add fillrect() support to stifb graphics driver
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Merge tag 'for-5.18/parisc-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc architecture updates from Helge Deller:

 - add vDSO support (allows us to use non-executable stacks)

 - many TLB and cache flush optimizations (by Dave Anglin)

 - fix handling of probe non-access faults (by Dave Anglin)

 - fix invalidate/flush vmap routines (by Dave Anglin)

 - avoid using hardware single-step in kprobes

 - enable ARCH_HAS_DEBUG_VM_PGTABLE

 - many cleanups in unaligned handlers, e.g. rewrite of existing
   assembly code

 - always use the self-extracting kernel feature

 - big refacturing and code reductions regarding space-register usage in
   get_user() and put_user()

 - add fillrect() support to stifb graphics driver

* tag 'for-5.18/parisc-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: (23 commits)
  parisc: Fix invalidate/flush vmap routines
  parisc: Avoid flushing cache on cache-less machines
  parisc: Avoid using hardware single-step in kprobes
  parisc: Improve CPU socket and core bootup info text
  parisc: Enable ARCH_HAS_DEBUG_VM_PGTABLE
  parisc: Avoid calling SMP cache flush functions on cache-less machines
  parisc: Increase parisc_cache_flush_threshold setting
  parisc/unaligned: Enhance user-space visible output
  parisc/unaligned: Rewrite 32-bit inline assembly of emulate_sth()
  parisc/unaligned: Rewrite 32-bit inline assembly of emulate_ldd()
  parisc/unaligned: Rewrite inline assembly of emulate_ldw()
  parisc/unaligned: Rewrite inline assembly of emulate_ldh()
  parisc/unaligned: Use EFAULT fixup handler in unaligned handlers
  parisc: Reduce code size by optimizing get_current() function calls
  parisc: Use constants to encode the space registers like SR_KERNEL
  parisc: Use SR_USER and SR_KERNEL in get_user() and put_user()
  parisc: Add defines for various space register
  parisc: Always use the self-extracting kernel feature
  video/fbdev/stifb: Implement the stifb_fillrect() function
  parisc: Add vDSO support
  ...
This commit is contained in:
Linus Torvalds 2022-03-21 13:09:39 -07:00
commit a04b1bf574
50 changed files with 1538 additions and 554 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
arch/parisc/Kconfig
View File

@ -10,10 +10,12 @@ config PARISC
select ARCH_HAS_ELF_RANDOMIZE
select ARCH_HAS_STRICT_KERNEL_RWX
select ARCH_HAS_UBSAN_SANITIZE_ALL
select ARCH_HAS_PTE_SPECIAL
select ARCH_NO_SG_CHAIN
select ARCH_SUPPORTS_HUGETLBFS if PA20
select ARCH_SUPPORTS_MEMORY_FAILURE
select ARCH_STACKWALK
select ARCH_HAS_DEBUG_VM_PGTABLE
select HAVE_RELIABLE_STACKTRACE
select DMA_OPS
select RTC_CLASS
@ -259,18 +261,6 @@ config PARISC_PAGE_SIZE_64KB
endchoice
config PARISC_SELF_EXTRACT
bool "Build kernel as self-extracting executable"
default y
help
Say Y if you want to build the parisc kernel as a kind of
self-extracting executable.
If you say N here, the kernel will be compressed with gzip
which can be loaded by the palo bootloader directly too.
If you don't know what to do here, say Y.
config SMP
bool "Symmetric multi-processing support"
help

37
arch/parisc/Makefile
View File

@ -15,12 +15,8 @@
# Mike Shaver, Helge Deller and Martin K. Petersen
#
ifdef CONFIG_PARISC_SELF_EXTRACT
boot := arch/parisc/boot
KBUILD_IMAGE := $(boot)/bzImage
else
KBUILD_IMAGE := vmlinuz
endif
NM = sh $(srctree)/arch/parisc/nm
CHECKFLAGS += -D__hppa__=1
@ -44,6 +40,16 @@ endif
export LD_BFD
# Set default 32 bits cross compilers for vdso
CC_ARCHES_32 = hppa hppa2.0 hppa1.1
CC_SUFFIXES = linux linux-gnu unknown-linux-gnu
CROSS32_COMPILE := $(call cc-cross-prefix, \
$(foreach a,$(CC_ARCHES_32), \
$(foreach s,$(CC_SUFFIXES),$(a)-$(s)-)))
CROSS32CC := $(CROSS32_COMPILE)gcc
export CROSS32CC
# Set default cross compiler for kernel build
ifdef cross_compiling
ifeq ($(CROSS_COMPILE),)
CC_SUFFIXES = linux linux-gnu unknown-linux-gnu
@ -155,14 +161,29 @@ Image: vmlinux
bzImage: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
ifdef CONFIG_PARISC_SELF_EXTRACT
vmlinuz: bzImage
$(OBJCOPY) $(boot)/bzImage $@
else
vmlinuz: vmlinux
@$(KGZIP) -cf -9 $< > $@
ifeq ($(KBUILD_EXTMOD),)
# We need to generate vdso-offsets.h before compiling certain files in kernel/.
# In order to do that, we should use the archprepare target, but we can't since
# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
# Therefore we need to generate the header after prepare0 has been made, hence
# this hack.
prepare: vdso_prepare
vdso_prepare: prepare0
$(if $(CONFIG_64BIT),$(Q)$(MAKE) \
$(build)=arch/parisc/kernel/vdso64 include/generated/vdso64-offsets.h)
$(Q)$(MAKE) $(build)=arch/parisc/kernel/vdso32 include/generated/vdso32-offsets.h
endif
PHONY += vdso_install
vdso_install:
$(Q)$(MAKE) $(build)=arch/parisc/kernel/vdso $@
$(if $(CONFIG_COMPAT_VDSO), \
$(Q)$(MAKE) $(build)=arch/parisc/kernel/vdso32 $@)
install:
$(CONFIG_SHELL) $(srctree)/arch/parisc/install.sh \
$(KERNELRELEASE) vmlinux System.map "$(INSTALL_PATH)"

6
arch/parisc/include/asm/assembly.h
View File

@ -47,6 +47,12 @@
#define PRIV_USER 3
#define PRIV_KERNEL 0
/* Space register used inside kernel */
#define SR_KERNEL 0
#define SR_TEMP1 1
#define SR_TEMP2 2
#define SR_USER 3
#ifdef __ASSEMBLY__
#ifdef CONFIG_64BIT

11
arch/parisc/include/asm/cache.h
View File

@ -39,16 +39,13 @@ extern int icache_stride;
extern struct pdc_cache_info cache_info;
void parisc_setup_cache_timing(void);
#define pdtlb(addr) asm volatile("pdtlb 0(%%sr1,%0)" \
#define pdtlb(sr, addr) asm volatile("pdtlb 0(%%sr%0,%1)" \
ALTERNATIVE(ALT_COND_NO_SMP, INSN_PxTLB) \
: : "r" (addr) : "memory")
#define pitlb(addr) asm volatile("pitlb 0(%%sr1,%0)" \
: : "i"(sr), "r" (addr) : "memory")
#define pitlb(sr, addr) asm volatile("pitlb 0(%%sr%0,%1)" \
ALTERNATIVE(ALT_COND_NO_SMP, INSN_PxTLB) \
ALTERNATIVE(ALT_COND_NO_SPLIT_TLB, INSN_NOP) \
: : "r" (addr) : "memory")
#define pdtlb_kernel(addr) asm volatile("pdtlb 0(%0)" \
ALTERNATIVE(ALT_COND_NO_SMP, INSN_PxTLB) \
: : "r" (addr) : "memory")
: : "i"(sr), "r" (addr) : "memory")
#define asm_io_fdc(addr) asm volatile("fdc %%r0(%0)" \
ALTERNATIVE(ALT_COND_NO_DCACHE, INSN_NOP) \

15
arch/parisc/include/asm/cacheflush.h
View File

@ -9,16 +9,11 @@
/* The usual comment is "Caches aren't brain-dead on the <architecture>".
* Unfortunately, that doesn't apply to PA-RISC. */
/* Internal implementation */
void flush_data_cache_local(void *); /* flushes local data-cache only */
void flush_instruction_cache_local(void *); /* flushes local code-cache only */
#ifdef CONFIG_SMP
void flush_data_cache(void); /* flushes data-cache only (all processors) */
void flush_instruction_cache(void); /* flushes i-cache only (all processors) */
#else
#define flush_data_cache() flush_data_cache_local(NULL)
#define flush_instruction_cache() flush_instruction_cache_local(NULL)
#endif
#include <linux/jump_label.h>
DECLARE_STATIC_KEY_TRUE(parisc_has_cache);
DECLARE_STATIC_KEY_TRUE(parisc_has_dcache);
DECLARE_STATIC_KEY_TRUE(parisc_has_icache);
#define flush_cache_dup_mm(mm) flush_cache_mm(mm)

8
arch/parisc/include/asm/current.h
View File

@ -2,14 +2,16 @@
#ifndef _ASM_PARISC_CURRENT_H
#define _ASM_PARISC_CURRENT_H
#include <asm/special_insns.h>
#ifndef __ASSEMBLY__
struct task_struct;
static __always_inline struct task_struct *get_current(void)
{
return (struct task_struct *) mfctl(30);
struct task_struct *ts;
/* do not use mfctl() macro as it is marked volatile */
asm( "mfctl %%cr30,%0" : "=r" (ts) );
return ts;
}
#define current get_current()

15
arch/parisc/include/asm/elf.h
View File

@ -359,4 +359,19 @@ struct mm_struct;
extern unsigned long arch_randomize_brk(struct mm_struct *);
#define arch_randomize_brk arch_randomize_brk
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
struct linux_binprm;
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
int executable_stack);
#define VDSO_AUX_ENT(a, b) NEW_AUX_ENT(a, b)
#define VDSO_CURRENT_BASE current->mm->context.vdso_base
#define ARCH_DLINFO \
do { \
if (VDSO_CURRENT_BASE) { \
NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_CURRENT_BASE);\
} \
} while (0)
#endif

5
arch/parisc/include/asm/kprobes.h
View File

@ -18,8 +18,9 @@
#include <linux/notifier.h>
#define PARISC_KPROBES_BREAK_INSN 0x3ff801f
#define PARISC_KPROBES_BREAK_INSN2 0x3ff801e
#define __ARCH_WANT_KPROBES_INSN_SLOT
#define MAX_INSN_SIZE 1
#define MAX_INSN_SIZE 2
typedef u32 kprobe_opcode_t;
struct kprobe;
@ -29,7 +30,7 @@ void arch_remove_kprobe(struct kprobe *p);
#define flush_insn_slot(p) \
flush_icache_range((unsigned long)&(p)->ainsn.insn[0], \
(unsigned long)&(p)->ainsn.insn[0] + \
sizeof(kprobe_opcode_t))
MAX_INSN_SIZE*sizeof(kprobe_opcode_t))
#define kretprobe_blacklist_size 0

6
arch/parisc/include/asm/mmu.h
View File

@ -2,7 +2,9 @@
#ifndef _PARISC_MMU_H_
#define _PARISC_MMU_H_
/* On parisc, we store the space id here */
typedef unsigned long mm_context_t;
typedef struct {
unsigned long space_id;
unsigned long vdso_base;
} mm_context_t;
#endif /* _PARISC_MMU_H_ */

16
arch/parisc/include/asm/mmu_context.h
View File

@ -20,7 +20,7 @@ init_new_context(struct task_struct *tsk, struct mm_struct *mm)
{
BUG_ON(atomic_read(&mm->mm_users) != 1);
mm->context = alloc_sid();
mm->context.space_id = alloc_sid();
return 0;
}
@ -28,22 +28,22 @@ init_new_context(struct task_struct *tsk, struct mm_struct *mm)
static inline void
destroy_context(struct mm_struct *mm)
{
free_sid(mm->context);
mm->context = 0;
free_sid(mm->context.space_id);
mm->context.space_id = 0;
}
static inline unsigned long __space_to_prot(mm_context_t context)
{
#if SPACEID_SHIFT == 0
return context << 1;
return context.space_id << 1;
#else
return context >> (SPACEID_SHIFT - 1);
return context.space_id >> (SPACEID_SHIFT - 1);
#endif
}
static inline void load_context(mm_context_t context)
{
mtsp(context, 3);
mtsp(context.space_id, SR_USER);
mtctl(__space_to_prot(context), 8);
}
@ -89,8 +89,8 @@ static inline void activate_mm(struct mm_struct *prev, struct mm_struct *next)
BUG_ON(next == &init_mm); /* Should never happen */
if (next->context == 0)
next->context = alloc_sid();
if (next->context.space_id == 0)
next->context.space_id = alloc_sid();
switch_mm(prev,next,current);
}

11
arch/parisc/include/asm/pgtable.h
View File

@ -70,9 +70,9 @@ static inline void purge_tlb_entries(struct mm_struct *mm, unsigned long addr)
unsigned long flags;
purge_tlb_start(flags);
mtsp(mm->context, 1);
pdtlb(addr);
pitlb(addr);
mtsp(mm->context.space_id, SR_TEMP1);
pdtlb(SR_TEMP1, addr);
pitlb(SR_TEMP1, addr);
purge_tlb_end(flags);
}
@ -219,9 +219,10 @@ extern void __update_cache(pte_t pte);
#define _PAGE_PRESENT (1 << xlate_pabit(_PAGE_PRESENT_BIT))
#define _PAGE_HUGE (1 << xlate_pabit(_PAGE_HPAGE_BIT))
#define _PAGE_USER (1 << xlate_pabit(_PAGE_USER_BIT))
#define _PAGE_SPECIAL (_PAGE_DMB)
#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | _PAGE_DIRTY | _PAGE_ACCESSED)
#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_SPECIAL)
#define _PAGE_KERNEL_RO (_PAGE_PRESENT | _PAGE_READ | _PAGE_DIRTY | _PAGE_ACCESSED)
#define _PAGE_KERNEL_EXEC (_PAGE_KERNEL_RO | _PAGE_EXEC)
#define _PAGE_KERNEL_RWX (_PAGE_KERNEL_EXEC | _PAGE_WRITE)
@ -348,6 +349,7 @@ static inline void pud_clear(pud_t *pud) {
static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; }
static inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~_PAGE_DIRTY; return pte; }
static inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
@ -355,6 +357,7 @@ static inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) &= ~_PAGE_WRITE; ret
static inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= _PAGE_DIRTY; return pte; }
static inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= _PAGE_ACCESSED; return pte; }
static inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) |= _PAGE_WRITE; return pte; }
static inline pte_t pte_mkspecial(pte_t pte) { pte_val(pte) |= _PAGE_SPECIAL; return pte; }
/*
* Huge pte definitions.

2
arch/parisc/include/asm/processor.h
View File

@ -236,7 +236,7 @@ on downward growing arches, it looks like this:
#define start_thread(regs, new_pc, new_sp) do { \
elf_addr_t *sp = (elf_addr_t *)new_sp; \
__u32 spaceid = (__u32)current->mm->context; \
__u32 spaceid = (__u32)current->mm->context.space_id; \
elf_addr_t pc = (elf_addr_t)new_pc | 3; \
elf_caddr_t *argv = (elf_caddr_t *)bprm->exec + 1; \
\

10
arch/parisc/include/asm/rt_sigframe.h
View File

@ -2,16 +2,8 @@
#ifndef _ASM_PARISC_RT_SIGFRAME_H
#define _ASM_PARISC_RT_SIGFRAME_H
#define SIGRETURN_TRAMP 4
#define SIGRESTARTBLOCK_TRAMP 5
#define TRAMP_SIZE (SIGRETURN_TRAMP + SIGRESTARTBLOCK_TRAMP)
struct rt_sigframe {
/* XXX: Must match trampoline size in arch/parisc/kernel/signal.c
Secondary to that it must protect the ERESTART_RESTARTBLOCK
trampoline we left on the stack (we were bad and didn't
change sp so we could run really fast.) */
unsigned int tramp[TRAMP_SIZE];
unsigned int tramp[2]; /* holds original return address */
struct siginfo info;
struct ucontext uc;
};

4
arch/parisc/include/asm/special_insns.h
View File

@ -55,8 +55,8 @@ static inline void set_eiem(unsigned long val)
#define mfsp(reg) ({ \
unsigned long cr; \
__asm__ __volatile__( \
"mfsp " #reg ",%0" : \
"=r" (cr) \
"mfsp %%sr%1,%0" \
: "=r" (cr) : "i"(reg) \
); \
cr; \
})

2
arch/parisc/include/asm/tlbflush.h
View File

@ -17,7 +17,7 @@ int __flush_tlb_range(unsigned long sid,
unsigned long start, unsigned long end);
#define flush_tlb_range(vma, start, end) \
__flush_tlb_range((vma)->vm_mm->context, start, end)
__flush_tlb_range((vma)->vm_mm->context.space_id, start, end)
#define flush_tlb_kernel_range(start, end) \
__flush_tlb_range(0, start, end)

1
arch/parisc/include/asm/traps.h
View File

@ -18,6 +18,7 @@ unsigned long parisc_acctyp(unsigned long code, unsigned int inst);
const char *trap_name(unsigned long code);
void do_page_fault(struct pt_regs *regs, unsigned long code,
unsigned long address);
int handle_nadtlb_fault(struct pt_regs *regs);
#endif
#endif

28
arch/parisc/include/asm/uaccess.h
View File

@ -79,18 +79,18 @@ struct exception_table_entry {
#define __get_user(val, ptr) \
({ \
__get_user_internal("%%sr3,", val, ptr); \
__get_user_internal(SR_USER, val, ptr); \
})
#define __get_user_asm(sr, val, ldx, ptr) \
{ \
register long __gu_val; \
\
__asm__("1: " ldx " 0(" sr "%2),%0\n" \
__asm__("1: " ldx " 0(%%sr%2,%3),%0\n" \
"9:\n" \
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 9b) \
: "=r"(__gu_val), "+r"(__gu_err) \
: "r"(ptr)); \
: "i"(sr), "r"(ptr)); \
\
(val) = (__force __typeof__(*(ptr))) __gu_val; \
}
@ -100,7 +100,7 @@ struct exception_table_entry {
{ \
type __z; \
long __err; \
__err = __get_user_internal("%%sr0,", __z, (type *)(src)); \
__err = __get_user_internal(SR_KERNEL, __z, (type *)(src)); \
if (unlikely(__err)) \
goto err_label; \
else \
@ -118,13 +118,13 @@ struct exception_table_entry {
} __gu_tmp; \
\
__asm__(" copy %%r0,%R0\n" \
"1: ldw 0(" sr "%2),%0\n" \
"2: ldw 4(" sr "%2),%R0\n" \
"1: ldw 0(%%sr%2,%3),%0\n" \
"2: ldw 4(%%sr%2,%3),%R0\n" \
"9:\n" \
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 9b) \
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 9b) \
: "=&r"(__gu_tmp.l), "+r"(__gu_err) \
: "r"(ptr)); \
: "i"(sr), "r"(ptr)); \
\
(val) = __gu_tmp.t; \
}
@ -151,14 +151,14 @@ struct exception_table_entry {
({ \
__typeof__(&*(ptr)) __ptr = ptr; \
__typeof__(*(__ptr)) __x = (__typeof__(*(__ptr)))(x); \
__put_user_internal("%%sr3,", __x, __ptr); \
__put_user_internal(SR_USER, __x, __ptr); \
})
#define __put_kernel_nofault(dst, src, type, err_label) \
{ \
type __z = *(type *)(src); \
long __err; \
__err = __put_user_internal("%%sr0,", __z, (type *)(dst)); \
__err = __put_user_internal(SR_KERNEL, __z, (type *)(dst)); \
if (unlikely(__err)) \
goto err_label; \
}
@ -178,24 +178,24 @@ struct exception_table_entry {
#define __put_user_asm(sr, stx, x, ptr) \
__asm__ __volatile__ ( \
"1: " stx " %2,0(" sr "%1)\n" \
"1: " stx " %1,0(%%sr%2,%3)\n" \
"9:\n" \
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 9b) \
: "+r"(__pu_err) \
: "r"(ptr), "r"(x))
: "r"(x), "i"(sr), "r"(ptr))
#if !defined(CONFIG_64BIT)
#define __put_user_asm64(sr, __val, ptr) do { \
__asm__ __volatile__ ( \
"1: stw %2,0(" sr "%1)\n" \
"2: stw %R2,4(" sr "%1)\n" \
"1: stw %1,0(%%sr%2,%3)\n" \
"2: stw %R1,4(%%sr%2,%3)\n" \
"9:\n" \
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 9b) \
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 9b) \
: "+r"(__pu_err) \
: "r"(ptr), "r"(__val)); \
: "r"(__val), "i"(sr), "r"(ptr)); \
} while (0)
#endif /* !defined(CONFIG_64BIT) */

4
arch/parisc/include/asm/unistd.h
View File

@ -63,10 +63,6 @@
); \
__sys_res = (long)__res; \
} \
if ( (unsigned long)__sys_res >= (unsigned long)-4095 ){ \
errno = -__sys_res; \
__sys_res = -1; \
} \
__sys_res; \
})

24
arch/parisc/include/asm/vdso.h Normal file
View File

@ -0,0 +1,24 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PARISC_VDSO_H__
#define __PARISC_VDSO_H__
#ifndef __ASSEMBLY__
#ifdef CONFIG_64BIT
#include <generated/vdso64-offsets.h>
#endif
#include <generated/vdso32-offsets.h>
#define VDSO64_SYMBOL(tsk, name) ((tsk)->mm->context.vdso_base + (vdso64_offset_##name))
#define VDSO32_SYMBOL(tsk, name) ((tsk)->mm->context.vdso_base + (vdso32_offset_##name))
extern struct vdso_data *vdso_data;
#endif /* __ASSEMBLY __ */
/* Default link addresses for the vDSOs */
#define VDSO_LBASE 0
#define VDSO_VERSION_STRING LINUX_5.18
#endif /* __PARISC_VDSO_H__ */

8
arch/parisc/include/uapi/asm/auxvec.h Normal file
View File

@ -0,0 +1,8 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_PARISC_AUXVEC_H
#define _UAPI_PARISC_AUXVEC_H
/* The vDSO location. */
#define AT_SYSINFO_EHDR 33
#endif /* _UAPI_PARISC_AUXVEC_H */

5
arch/parisc/kernel/Makefile
View File

@ -39,3 +39,8 @@ obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_KEXEC_CORE) += kexec.o relocate_kernel.o
obj-$(CONFIG_KEXEC_FILE) += kexec_file.o
# vdso
obj-y += vdso.o
obj-$(CONFIG_64BIT) += vdso64/
obj-y += vdso32/

10
arch/parisc/kernel/alternative.c
View File

@ -8,6 +8,7 @@
#include <asm/processor.h>
#include <asm/sections.h>
#include <asm/alternative.h>
#include <asm/cacheflush.h>
#include <linux/module.h>
@ -107,5 +108,14 @@ void __init apply_alternatives_all(void)
apply_alternatives((struct alt_instr *) &__alt_instructions,
(struct alt_instr *) &__alt_instructions_end, NULL);
if (cache_info.dc_size == 0 && cache_info.ic_size == 0) {
pr_info("alternatives: optimizing cache-flushes.\n");
static_branch_disable(&parisc_has_cache);
}
if (cache_info.dc_size == 0)
static_branch_disable(&parisc_has_dcache);
if (cache_info.ic_size == 0)
static_branch_disable(&parisc_has_icache);
set_kernel_text_rw(0);
}

9
arch/parisc/kernel/asm-offsets.c
View File

@ -26,7 +26,11 @@
#include <asm/ptrace.h>
#include <asm/processor.h>
#include <asm/pdc.h>
#include <uapi/asm/sigcontext.h>
#include <asm/ucontext.h>
#include <asm/rt_sigframe.h>
#include <linux/uaccess.h>
#include "signal32.h"
/* Add FRAME_SIZE to the size x and align it to y. All definitions
* that use align_frame will include space for a frame.
@ -218,6 +222,11 @@ int main(void)
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
DEFINE(TI_PRE_COUNT, offsetof(struct task_struct, thread_info.preempt_count));
BLANK();
DEFINE(ASM_SIGFRAME_SIZE, PARISC_RT_SIGFRAME_SIZE);
DEFINE(SIGFRAME_CONTEXT_REGS, offsetof(struct rt_sigframe, uc.uc_mcontext) - PARISC_RT_SIGFRAME_SIZE);
DEFINE(ASM_SIGFRAME_SIZE32, PARISC_RT_SIGFRAME_SIZE32);
DEFINE(SIGFRAME_CONTEXT_REGS32, offsetof(struct compat_rt_sigframe, uc.uc_mcontext) - PARISC_RT_SIGFRAME_SIZE32);
BLANK();
DEFINE(ICACHE_BASE, offsetof(struct pdc_cache_info, ic_base));
DEFINE(ICACHE_STRIDE, offsetof(struct pdc_cache_info, ic_stride));
DEFINE(ICACHE_COUNT, offsetof(struct pdc_cache_info, ic_count));

145
arch/parisc/kernel/cache.c
View File

@ -38,6 +38,9 @@ EXPORT_SYMBOL(flush_dcache_page_asm);
void purge_dcache_page_asm(unsigned long phys_addr, unsigned long vaddr);
void flush_icache_page_asm(unsigned long phys_addr, unsigned long vaddr);
/* Internal implementation in arch/parisc/kernel/pacache.S */
void flush_data_cache_local(void *); /* flushes local data-cache only */
void flush_instruction_cache_local(void); /* flushes local code-cache only */
/* On some machines (i.e., ones with the Merced bus), there can be
* only a single PxTLB broadcast at a time; this must be guaranteed
@ -58,26 +61,35 @@ struct pdc_cache_info cache_info __ro_after_init;
static struct pdc_btlb_info btlb_info __ro_after_init;
#endif
#ifdef CONFIG_SMP
void
flush_data_cache(void)
{
on_each_cpu(flush_data_cache_local, NULL, 1);
}
void
flush_instruction_cache(void)
{
on_each_cpu(flush_instruction_cache_local, NULL, 1);
}
#endif
DEFINE_STATIC_KEY_TRUE(parisc_has_cache);
DEFINE_STATIC_KEY_TRUE(parisc_has_dcache);
DEFINE_STATIC_KEY_TRUE(parisc_has_icache);
void
flush_cache_all_local(void)
static void cache_flush_local_cpu(void *dummy)
{
flush_instruction_cache_local(NULL);
flush_data_cache_local(NULL);
if (static_branch_likely(&parisc_has_icache))
flush_instruction_cache_local();
if (static_branch_likely(&parisc_has_dcache))
flush_data_cache_local(NULL);
}
EXPORT_SYMBOL(flush_cache_all_local);
void flush_cache_all_local(void)
{
cache_flush_local_cpu(NULL);
}
void flush_cache_all(void)
{
if (static_branch_likely(&parisc_has_cache))
on_each_cpu(cache_flush_local_cpu, NULL, 1);
}
static inline void flush_data_cache(void)
{
if (static_branch_likely(&parisc_has_dcache))
on_each_cpu(flush_data_cache_local, NULL, 1);
}
/* Virtual address of pfn. */
#define pfn_va(pfn) __va(PFN_PHYS(pfn))
@ -303,6 +315,8 @@ static inline void
__flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr,
unsigned long physaddr)
{
if (!static_branch_likely(&parisc_has_cache))
return;
preempt_disable();
flush_dcache_page_asm(physaddr, vmaddr);
if (vma->vm_flags & VM_EXEC)
@ -314,6 +328,8 @@ static inline void
__purge_cache_page(struct vm_area_struct *vma, unsigned long vmaddr,
unsigned long physaddr)
{
if (!static_branch_likely(&parisc_has_cache))
return;
preempt_disable();
purge_dcache_page_asm(physaddr, vmaddr);
if (vma->vm_flags & VM_EXEC)
@ -375,7 +391,6 @@ EXPORT_SYMBOL(flush_dcache_page);
/* Defined in arch/parisc/kernel/pacache.S */
EXPORT_SYMBOL(flush_kernel_dcache_range_asm);
EXPORT_SYMBOL(flush_data_cache_local);
EXPORT_SYMBOL(flush_kernel_icache_range_asm);
#define FLUSH_THRESHOLD 0x80000 /* 0.5MB */
@ -388,7 +403,7 @@ void __init parisc_setup_cache_timing(void)
{
unsigned long rangetime, alltime;
unsigned long size;
unsigned long threshold;
unsigned long threshold, threshold2;
alltime = mfctl(16);
flush_data_cache();
@ -403,8 +418,20 @@ void __init parisc_setup_cache_timing(void)
alltime, size, rangetime);
threshold = L1_CACHE_ALIGN(size * alltime / rangetime);
if (threshold > cache_info.dc_size)
threshold = cache_info.dc_size;
/*
* The threshold computed above isn't very reliable since the
* flush times depend greatly on the percentage of dirty lines
* in the flush range. Further, the whole cache time doesn't
* include the time to refill lines that aren't in the mm/vma
* being flushed. By timing glibc build and checks on mako cpus,
* the following formula seems to work reasonably well. The
* value from the timing calculation is too small, and increases
* build and check times by almost a factor two.
*/
threshold2 = cache_info.dc_size * num_online_cpus();
if (threshold2 > threshold)
threshold = threshold2;
if (threshold)
parisc_cache_flush_threshold = threshold;
printk(KERN_INFO "Cache flush threshold set to %lu KiB\n",
@ -457,7 +484,7 @@ void flush_kernel_dcache_page_addr(void *addr)
flush_kernel_dcache_page_asm(addr);
purge_tlb_start(flags);
pdtlb_kernel(addr);
pdtlb(SR_KERNEL, addr);
purge_tlb_end(flags);
}
EXPORT_SYMBOL(flush_kernel_dcache_page_addr);
@ -496,25 +523,15 @@ int __flush_tlb_range(unsigned long sid, unsigned long start,
but cause a purge request to be broadcast to other TLBs. */
while (start < end) {
purge_tlb_start(flags);
mtsp(sid, 1);
pdtlb(start);
pitlb(start);
mtsp(sid, SR_TEMP1);
pdtlb(SR_TEMP1, start);
pitlb(SR_TEMP1, start);
purge_tlb_end(flags);
start += PAGE_SIZE;
}
return 0;
}
static void cacheflush_h_tmp_function(void *dummy)
{
flush_cache_all_local();
}
void flush_cache_all(void)
{
on_each_cpu(cacheflush_h_tmp_function, NULL, 1);
}
static inline unsigned long mm_total_size(struct mm_struct *mm)
{
struct vm_area_struct *vma;
@ -558,15 +575,6 @@ static void flush_cache_pages(struct vm_area_struct *vma, struct mm_struct *mm,
}
}
static void flush_user_cache_tlb(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
flush_user_dcache_range_asm(start, end);
if (vma->vm_flags & VM_EXEC)
flush_user_icache_range_asm(start, end);
flush_tlb_range(vma, start, end);
}
void flush_cache_mm(struct mm_struct *mm)
{
struct vm_area_struct *vma;
@ -575,23 +583,14 @@ void flush_cache_mm(struct mm_struct *mm)
rp3440, etc. So, avoid it if the mm isn't too big. */
if ((!IS_ENABLED(CONFIG_SMP) || !arch_irqs_disabled()) &&
mm_total_size(mm) >= parisc_cache_flush_threshold) {
if (mm->context)
if (mm->context.space_id)
flush_tlb_all();
flush_cache_all();
return;
}
preempt_disable();
if (mm->context == mfsp(3)) {
for (vma = mm->mmap; vma; vma = vma->vm_next)
flush_user_cache_tlb(vma, vma->vm_start, vma->vm_end);
preempt_enable();
return;
}
for (vma = mm->mmap; vma; vma = vma->vm_next)
flush_cache_pages(vma, mm, vma->vm_start, vma->vm_end);
preempt_enable();
}
void flush_cache_range(struct vm_area_struct *vma,
@ -599,29 +598,21 @@ void flush_cache_range(struct vm_area_struct *vma,
{
if ((!IS_ENABLED(CONFIG_SMP) || !arch_irqs_disabled()) &&
end - start >= parisc_cache_flush_threshold) {
if (vma->vm_mm->context)
if (vma->vm_mm->context.space_id)
flush_tlb_range(vma, start, end);
flush_cache_all();
return;
}
preempt_disable();
if (vma->vm_mm->context == mfsp(3)) {
flush_user_cache_tlb(vma, start, end);
preempt_enable();
return;
}
flush_cache_pages(vma, vma->vm_mm, vma->vm_start, vma->vm_end);
preempt_enable();
flush_cache_pages(vma, vma->vm_mm, start, end);
}
void
flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn)
{
if (pfn_valid(pfn)) {
if (likely(vma->vm_mm->context)) {
flush_tlb_page(vma, vmaddr);
flush_tlb_page(vma, vmaddr);
if (likely(vma->vm_mm->context.space_id)) {
__flush_cache_page(vma, vmaddr, PFN_PHYS(pfn));
} else {
__purge_cache_page(vma, vmaddr, PFN_PHYS(pfn));
@ -633,6 +624,7 @@ void flush_kernel_vmap_range(void *vaddr, int size)
{
unsigned long start = (unsigned long)vaddr;
unsigned long end = start + size;
unsigned long flags, physaddr;
if ((!IS_ENABLED(CONFIG_SMP) || !arch_irqs_disabled()) &&
(unsigned long)size >= parisc_cache_flush_threshold) {
@ -641,8 +633,14 @@ void flush_kernel_vmap_range(void *vaddr, int size)
return;
}
flush_kernel_dcache_range_asm(start, end);
flush_tlb_kernel_range(start, end);
while (start < end) {
physaddr = lpa(start);
purge_tlb_start(flags);
pdtlb(SR_KERNEL, start);
purge_tlb_end(flags);
flush_dcache_page_asm(physaddr, start);
start += PAGE_SIZE;
}
}
EXPORT_SYMBOL(flush_kernel_vmap_range);
@ -650,6 +648,7 @@ void invalidate_kernel_vmap_range(void *vaddr, int size)
{
unsigned long start = (unsigned long)vaddr;
unsigned long end = start + size;
unsigned long flags, physaddr;
if ((!IS_ENABLED(CONFIG_SMP) || !arch_irqs_disabled()) &&
(unsigned long)size >= parisc_cache_flush_threshold) {
@ -658,7 +657,13 @@ void invalidate_kernel_vmap_range(void *vaddr, int size)
return;
}
purge_kernel_dcache_range_asm(start, end);
flush_tlb_kernel_range(start, end);
while (start < end) {
physaddr = lpa(start);
purge_tlb_start(flags);
pdtlb(SR_KERNEL, start);
purge_tlb_end(flags);
purge_dcache_page_asm(physaddr, start);
start += PAGE_SIZE;
}
}
EXPORT_SYMBOL(invalidate_kernel_vmap_range);

72
arch/parisc/kernel/entry.S
View File

@ -1288,74 +1288,12 @@ nadtlb_check_alias_20:
nadtlb_emulate:
/*
* Non access misses can be caused by fdc,fic,pdc,lpa,probe and
* probei instructions. We don't want to fault for these
* instructions (not only does it not make sense, it can cause
* deadlocks, since some flushes are done with the mmap
* semaphore held). If the translation doesn't exist, we can't
* insert a translation, so have to emulate the side effects
* of the instruction. Since we don't insert a translation
* we can get a lot of faults during a flush loop, so it makes
* sense to try to do it here with minimum overhead. We only
* emulate fdc,fic,pdc,probew,prober instructions whose base
* and index registers are not shadowed. We defer everything
* else to the "slow" path.
* Non-access misses can be caused by fdc,fic,pdc,lpa,probe and
* probei instructions. The kernel no longer faults doing flushes.
* Use of lpa and probe instructions is rare. Given the issue
* with shadow registers, we defer everything to the "slow" path.
*/
mfctl %cr19,%r9 /* Get iir */
/* PA 2.0 Arch Ref. Book pg 382 has a good description of the insn bits.
Checks for fdc,fdce,pdc,"fic,4f",prober,probeir,probew, probeiw */
/* Checks for fdc,fdce,pdc,"fic,4f" only */
ldi 0x280,%r16
and %r9,%r16,%r17
cmpb,<>,n %r16,%r17,nadtlb_probe_check
bb,>=,n %r9,26,nadtlb_nullify /* m bit not set, just nullify */
BL get_register,%r25
extrw,u %r9,15,5,%r8 /* Get index register # */
cmpib,COND(=),n -1,%r1,nadtlb_fault /* have to use slow path */
copy %r1,%r24
BL get_register,%r25
extrw,u %r9,10,5,%r8 /* Get base register # */
cmpib,COND(=),n -1,%r1,nadtlb_fault /* have to use slow path */
BL set_register,%r25
add,l %r1,%r24,%r1 /* doesn't affect c/b bits */
nadtlb_nullify:
mfctl %ipsw,%r8
ldil L%PSW_N,%r9
or %r8,%r9,%r8 /* Set PSW_N */
mtctl %r8,%ipsw
rfir
nop
/*
When there is no translation for the probe address then we
must nullify the insn and return zero in the target register.
This will indicate to the calling code that it does not have
write/read privileges to this address.
This should technically work for prober and probew in PA 1.1,
and also probe,r and probe,w in PA 2.0
WARNING: USE ONLY NON-SHADOW REGISTERS WITH PROBE INSN!
THE SLOW-PATH EMULATION HAS NOT BEEN WRITTEN YET.
*/
nadtlb_probe_check:
ldi 0x80,%r16
and %r9,%r16,%r17
cmpb,<>,n %r16,%r17,nadtlb_fault /* Must be probe,[rw]*/
BL get_register,%r25 /* Find the target register */
extrw,u %r9,31,5,%r8 /* Get target register */
cmpib,COND(=),n -1,%r1,nadtlb_fault /* have to use slow path */
BL set_register,%r25
copy %r0,%r1 /* Write zero to target register */
b nadtlb_nullify /* Nullify return insn */
nop
b,n nadtlb_fault
#ifdef CONFIG_64BIT
itlb_miss_20w:

28
arch/parisc/kernel/kprobes.c
View File

@ -5,6 +5,7 @@
* PA-RISC kprobes implementation
*
* Copyright (c) 2019 Sven Schnelle <svens@stackframe.org>
* Copyright (c) 2022 Helge Deller <deller@gmx.de>
*/
#include <linux/types.h>
@ -25,9 +26,14 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p)
if (!p->ainsn.insn)
return -ENOMEM;
memcpy(p->ainsn.insn, p->addr,
MAX_INSN_SIZE * sizeof(kprobe_opcode_t));
/*
* Set up new instructions. Second break instruction will
* trigger call of parisc_kprobe_ss_handler().
*/
p->opcode = *p->addr;
p->ainsn.insn[0] = p->opcode;
p->ainsn.insn[1] = PARISC_KPROBES_BREAK_INSN2;
flush_insn_slot(p);
return 0;
}
@ -73,9 +79,7 @@ static void __kprobes setup_singlestep(struct kprobe *p,
{
kcb->iaoq[0] = regs->iaoq[0];
kcb->iaoq[1] = regs->iaoq[1];
regs->iaoq[0] = (unsigned long)p->ainsn.insn;
mtctl(0, 0);
regs->gr[0] |= PSW_R;
instruction_pointer_set(regs, (unsigned long)p->ainsn.insn);
}
int __kprobes parisc_kprobe_break_handler(struct pt_regs *regs)
@ -165,9 +169,8 @@ int __kprobes parisc_kprobe_ss_handler(struct pt_regs *regs)
regs->iaoq[0] = kcb->iaoq[1];
break;
default:
regs->iaoq[1] = kcb->iaoq[0];
regs->iaoq[1] += (regs->iaoq[1] - regs->iaoq[0]) + 4;
regs->iaoq[0] = kcb->iaoq[1];
regs->iaoq[1] = regs->iaoq[0] + 4;
break;
}
kcb->kprobe_status = KPROBE_HIT_SSDONE;
@ -191,14 +194,17 @@ static struct kprobe trampoline_p = {
static int __kprobes trampoline_probe_handler(struct kprobe *p,
struct pt_regs *regs)
{
unsigned long orig_ret_address;
orig_ret_address = __kretprobe_trampoline_handler(regs, NULL);
instruction_pointer_set(regs, orig_ret_address);
__kretprobe_trampoline_handler(regs, NULL);
return 1;
}
void arch_kretprobe_fixup_return(struct pt_regs *regs,
kprobe_opcode_t *correct_ret_addr)
{
regs->gr[2] = (unsigned long)correct_ret_addr;
}
void __kprobes arch_prepare_kretprobe(struct kretprobe_instance *ri,
struct pt_regs *regs)
{

4
arch/parisc/kernel/pci-dma.c
View File

@ -91,7 +91,7 @@ static inline int map_pte_uncached(pte_t * pte,
printk(KERN_ERR "map_pte_uncached: page already exists\n");
purge_tlb_start(flags);
set_pte(pte, __mk_pte(*paddr_ptr, PAGE_KERNEL_UNC));
pdtlb_kernel(orig_vaddr);
pdtlb(SR_KERNEL, orig_vaddr);
purge_tlb_end(flags);
vaddr += PAGE_SIZE;
orig_vaddr += PAGE_SIZE;
@ -175,7 +175,7 @@ static inline void unmap_uncached_pte(pmd_t * pmd, unsigned long vaddr,
pte_clear(&init_mm, vaddr, pte);
purge_tlb_start(flags);
pdtlb_kernel(orig_vaddr);
pdtlb(SR_KERNEL, orig_vaddr);
purge_tlb_end(flags);
vaddr += PAGE_SIZE;
orig_vaddr += PAGE_SIZE;

225
arch/parisc/kernel/signal.c
View File

@ -1,16 +1,13 @@
// SPDX-License-Identifier: GPL-2.0
/*
* linux/arch/parisc/kernel/signal.c: Architecture-specific signal
* handling support.
* PA-RISC architecture-specific signal handling support.
*
* Copyright (C) 2000 David Huggins-Daines <dhd@debian.org>
* Copyright (C) 2000 Linuxcare, Inc.
* Copyright (C) 2000-2022 Helge Deller <deller@gmx.de>
* Copyright (C) 2022 John David Anglin <dave.anglin@bell.net>
*
* Based on the ia64, i386, and alpha versions.
*
* Like the IA-64, we are a recent enough port (we are *starting*
* with glibc2.2) that we do not need to support the old non-realtime
* Linux signals. Therefore we don't.
*/
#include <linux/sched.h>
@ -32,6 +29,7 @@
#include <linux/uaccess.h>
#include <asm/cacheflush.h>
#include <asm/asm-offsets.h>
#include <asm/vdso.h>
#ifdef CONFIG_COMPAT
#include "signal32.h"
@ -59,14 +57,6 @@
* Do a signal return - restore sigcontext.
*/
/* Trampoline for calling rt_sigreturn() */
#define INSN_LDI_R25_0 0x34190000 /* ldi 0,%r25 (in_syscall=0) */
#define INSN_LDI_R25_1 0x34190002 /* ldi 1,%r25 (in_syscall=1) */
#define INSN_LDI_R20 0x3414015a /* ldi __NR_rt_sigreturn,%r20 */
#define INSN_BLE_SR2_R0 0xe4008200 /* be,l 0x100(%sr2,%r0),%sr0,%r31 */
/* For debugging */
#define INSN_DIE_HORRIBLY 0x68000ccc /* stw %r0,0x666(%sr0,%r0) */
static long
restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
{
@ -77,9 +67,9 @@ restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
err |= __copy_from_user(regs->iaoq, sc->sc_iaoq, sizeof(regs->iaoq));
err |= __copy_from_user(regs->iasq, sc->sc_iasq, sizeof(regs->iasq));
err |= __get_user(regs->sar, &sc->sc_sar);
DBG(2,"restore_sigcontext: iaoq is %#lx / %#lx\n",
regs->iaoq[0],regs->iaoq[1]);
DBG(2,"restore_sigcontext: r28 is %ld\n", regs->gr[28]);
DBG(2, "%s: iaoq is %#lx / %#lx\n",
__func__, regs->iaoq[0], regs->iaoq[1]);
DBG(2, "%s: r28 is %ld\n", __func__, regs->gr[28]);
return err;
}
@ -102,7 +92,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
/* Unwind the user stack to get the rt_sigframe structure. */
frame = (struct rt_sigframe __user *)
(usp - sigframe_size);
DBG(2,"sys_rt_sigreturn: frame is %p\n", frame);
DBG(2, "%s: frame is %p pid %d\n", __func__, frame, task_pid_nr(current));
regs->orig_r28 = 1; /* no restarts for sigreturn */
@ -110,7 +100,6 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
compat_frame = (struct compat_rt_sigframe __user *)frame;
if (is_compat_task()) {
DBG(2,"sys_rt_sigreturn: ELF32 process.\n");
if (get_compat_sigset(&set, &compat_frame->uc.uc_sigmask))
goto give_sigsegv;
} else
@ -125,25 +114,25 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
/* Good thing we saved the old gr[30], eh? */
#ifdef CONFIG_64BIT
if (is_compat_task()) {
DBG(1,"sys_rt_sigreturn: compat_frame->uc.uc_mcontext 0x%p\n",
&compat_frame->uc.uc_mcontext);
DBG(1, "%s: compat_frame->uc.uc_mcontext 0x%p\n",
__func__, &compat_frame->uc.uc_mcontext);
// FIXME: Load upper half from register file
if (restore_sigcontext32(&compat_frame->uc.uc_mcontext,
&compat_frame->regs, regs))
goto give_sigsegv;
DBG(1,"sys_rt_sigreturn: usp %#08lx stack 0x%p\n",
usp, &compat_frame->uc.uc_stack);
DBG(1, "%s: usp %#08lx stack 0x%p\n",
__func__, usp, &compat_frame->uc.uc_stack);
if (compat_restore_altstack(&compat_frame->uc.uc_stack))
goto give_sigsegv;
} else
#endif
{
DBG(1,"sys_rt_sigreturn: frame->uc.uc_mcontext 0x%p\n",
&frame->uc.uc_mcontext);
DBG(1, "%s: frame->uc.uc_mcontext 0x%p\n",
__func__, &frame->uc.uc_mcontext);
if (restore_sigcontext(&frame->uc.uc_mcontext, regs))
goto give_sigsegv;
DBG(1,"sys_rt_sigreturn: usp %#08lx stack 0x%p\n",
usp, &frame->uc.uc_stack);
DBG(1, "%s: usp %#08lx stack 0x%p\n",
__func__, usp, &frame->uc.uc_stack);
if (restore_altstack(&frame->uc.uc_stack))
goto give_sigsegv;
}
@ -155,14 +144,11 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
*/
if (in_syscall)
regs->gr[31] = regs->iaoq[0];
#if DEBUG_SIG
DBG(1,"sys_rt_sigreturn: returning to %#lx, DUMPING REGS:\n", regs->iaoq[0]);
show_regs(regs);
#endif
return;
give_sigsegv:
DBG(1,"sys_rt_sigreturn: Sending SIGSEGV\n");
DBG(1, "%s: Sending SIGSEGV\n", __func__);
force_sig(SIGSEGV);
return;
}
@ -177,15 +163,15 @@ get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
/*FIXME: ELF32 vs. ELF64 has different frame_size, but since we
don't use the parameter it doesn't matter */
DBG(1,"get_sigframe: ka = %#lx, sp = %#lx, frame_size = %#lx\n",
(unsigned long)ka, sp, frame_size);
DBG(1, "%s: ka = %#lx, sp = %#lx, frame_size = %zu\n",
__func__, (unsigned long)ka, sp, frame_size);
/* Align alternate stack and reserve 64 bytes for the signal
handler's frame marker. */
if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && ! sas_ss_flags(sp))
sp = (current->sas_ss_sp + 0x7f) & ~0x3f; /* Stacks grow up! */
DBG(1,"get_sigframe: Returning sp = %#lx\n", (unsigned long)sp);
DBG(1, "%s: Returning sp = %#lx\n", __func__, (unsigned long)sp);
return (void __user *) sp; /* Stacks grow up. Fun. */
}
@ -205,20 +191,20 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, int in_sysc
err |= __put_user(regs->gr[31]+4, &sc->sc_iaoq[1]);
err |= __put_user(regs->sr[3], &sc->sc_iasq[0]);
err |= __put_user(regs->sr[3], &sc->sc_iasq[1]);
DBG(1,"setup_sigcontext: iaoq %#lx / %#lx (in syscall)\n",
regs->gr[31], regs->gr[31]+4);
DBG(1, "%s: iaoq %#lx / %#lx (in syscall)\n",
__func__, regs->gr[31], regs->gr[31]+4);
} else {
err |= __copy_to_user(sc->sc_iaoq, regs->iaoq, sizeof(regs->iaoq));
err |= __copy_to_user(sc->sc_iasq, regs->iasq, sizeof(regs->iasq));
DBG(1,"setup_sigcontext: iaoq %#lx / %#lx (not in syscall)\n",
regs->iaoq[0], regs->iaoq[1]);
DBG(1, "%s: iaoq %#lx / %#lx (not in syscall)\n",
__func__, regs->iaoq[0], regs->iaoq[1]);
}
err |= __put_user(flags, &sc->sc_flags);
err |= __copy_to_user(sc->sc_gr, regs->gr, sizeof(regs->gr));
err |= __copy_to_user(sc->sc_fr, regs->fr, sizeof(regs->fr));
err |= __put_user(regs->sar, &sc->sc_sar);
DBG(1,"setup_sigcontext: r28 is %ld\n", regs->gr[28]);
DBG(1, "%s: r28 is %ld\n", __func__, regs->gr[28]);
return err;
}
@ -230,7 +216,7 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
struct rt_sigframe __user *frame;
unsigned long rp, usp;
unsigned long haddr, sigframe_size;
unsigned long start, end;
unsigned long start;
int err = 0;
#ifdef CONFIG_64BIT
struct compat_rt_sigframe __user * compat_frame;
@ -247,8 +233,7 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
#endif
frame = get_sigframe(&ksig->ka, usp, sigframe_size);
DBG(1,"SETUP_RT_FRAME: START\n");
DBG(1,"setup_rt_frame: frame %p info %p\n", frame, ksig->info);
DBG(1, "%s: frame %p info %p\n", __func__, frame, &ksig->info);
start = (unsigned long) frame;
if (start >= user_addr_max() - sigframe_size)
@ -259,11 +244,12 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
compat_frame = (struct compat_rt_sigframe __user *)frame;
if (is_compat_task()) {
DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &compat_frame->info);
DBG(1, "%s: frame->info = 0x%p\n", __func__, &compat_frame->info);
err |= copy_siginfo_to_user32(&compat_frame->info, &ksig->info);
err |= __compat_save_altstack( &compat_frame->uc.uc_stack, regs->gr[30]);
DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &compat_frame->uc);
DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &compat_frame->uc.uc_mcontext);
DBG(1, "%s: frame->uc = 0x%p\n", __func__, &compat_frame->uc);
DBG(1, "%s: frame->uc.uc_mcontext = 0x%p\n",
__func__, &compat_frame->uc.uc_mcontext);
err |= setup_sigcontext32(&compat_frame->uc.uc_mcontext,
&compat_frame->regs, regs, in_syscall);
err |= put_compat_sigset(&compat_frame->uc.uc_sigmask, set,
@ -271,11 +257,12 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
} else
#endif
{
DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &frame->info);
DBG(1, "%s: frame->info = 0x%p\n", __func__, &frame->info);
err |= copy_siginfo_to_user(&frame->info, &ksig->info);
err |= __save_altstack(&frame->uc.uc_stack, regs->gr[30]);
DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &frame->uc);
DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &frame->uc.uc_mcontext);
DBG(1, "%s: frame->uc = 0x%p\n", __func__, &frame->uc);
DBG(1, "%s: frame->uc.uc_mcontext = 0x%p\n",
__func__, &frame->uc.uc_mcontext);
err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, in_syscall);
/* FIXME: Should probably be converted as well for the compat case */
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
@ -284,32 +271,15 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
if (err)
return -EFAULT;
/* Set up to return from userspace. If provided, use a stub
already in userspace. The first words of tramp are used to
save the previous sigrestartblock trampoline that might be
on the stack. We start the sigreturn trampoline at
SIGRESTARTBLOCK_TRAMP+X. */
err |= __put_user(in_syscall ? INSN_LDI_R25_1 : INSN_LDI_R25_0,
&frame->tramp[SIGRESTARTBLOCK_TRAMP+0]);
err |= __put_user(INSN_LDI_R20,
&frame->tramp[SIGRESTARTBLOCK_TRAMP+1]);
err |= __put_user(INSN_BLE_SR2_R0,
&frame->tramp[SIGRESTARTBLOCK_TRAMP+2]);
err |= __put_user(INSN_NOP, &frame->tramp[SIGRESTARTBLOCK_TRAMP+3]);
#ifdef CONFIG_64BIT
if (!is_compat_task())
rp = VDSO64_SYMBOL(current, sigtramp_rt);
else
#endif
rp = VDSO32_SYMBOL(current, sigtramp_rt);
start = (unsigned long) &frame->tramp[0];
end = (unsigned long) &frame->tramp[TRAMP_SIZE];
flush_user_dcache_range_asm(start, end);
flush_user_icache_range_asm(start, end);
/* TRAMP Words 0-4, Length 5 = SIGRESTARTBLOCK_TRAMP
* TRAMP Words 5-9, Length 4 = SIGRETURN_TRAMP
* So the SIGRETURN_TRAMP is at the end of SIGRESTARTBLOCK_TRAMP
*/
rp = (unsigned long) &frame->tramp[SIGRESTARTBLOCK_TRAMP];
if (err)
return -EFAULT;
if (in_syscall)
rp += 4*4; /* skip 4 instructions and start at ldi 1,%r25 */
haddr = A(ksig->ka.sa.sa_handler);
/* The sa_handler may be a pointer to a function descriptor */
@ -340,8 +310,8 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
haddr = fdesc.addr;
regs->gr[19] = fdesc.gp;
DBG(1,"setup_rt_frame: 64 bit signal, exe=%#lx, r19=%#lx, in_syscall=%d\n",
haddr, regs->gr[19], in_syscall);
DBG(1, "%s: 64 bit signal, exe=%#lx, r19=%#lx, in_syscall=%d\n",
__func__, haddr, regs->gr[19], in_syscall);
}
#endif
@ -351,7 +321,7 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
regs->gr[31] = haddr;
#ifdef CONFIG_64BIT
if (!test_thread_flag(TIF_32BIT))
sigframe_size |= 1;
sigframe_size |= 1; /* XXX ???? */
#endif
} else {
unsigned long psw = USER_PSW;
@ -373,11 +343,11 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
}
regs->gr[0] = psw;
regs->iaoq[0] = haddr | 3;
regs->iaoq[0] = haddr | PRIV_USER;
regs->iaoq[1] = regs->iaoq[0] + 4;
}
regs->gr[2] = rp; /* userland return pointer */
regs->gr[2] = rp; /* userland return pointer */
regs->gr[26] = ksig->sig; /* signal number */
#ifdef CONFIG_64BIT
@ -391,15 +361,15 @@ setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs,
regs->gr[24] = A(&frame->uc); /* ucontext pointer */
}
DBG(1,"setup_rt_frame: making sigreturn frame: %#lx + %#lx = %#lx\n",
DBG(1, "%s: making sigreturn frame: %#lx + %#lx = %#lx\n", __func__,
regs->gr[30], sigframe_size,
regs->gr[30] + sigframe_size);
/* Raise the user stack pointer to make a proper call frame. */
regs->gr[30] = (A(frame) + sigframe_size);
DBG(1,"setup_rt_frame: sig deliver (%s,%d) frame=0x%p sp=%#lx iaoq=%#lx/%#lx rp=%#lx\n",
current->comm, current->pid, frame, regs->gr[30],
DBG(1, "%s: sig deliver (%s,%d) frame=0x%p sp=%#lx iaoq=%#lx/%#lx rp=%#lx\n",
__func__, current->comm, current->pid, frame, regs->gr[30],
regs->iaoq[0], regs->iaoq[1], rp);
return 0;
@ -415,8 +385,8 @@ handle_signal(struct ksignal *ksig, struct pt_regs *regs, int in_syscall)
int ret;
sigset_t *oldset = sigmask_to_save();
DBG(1,"handle_signal: sig=%ld, ka=%p, info=%p, oldset=%p, regs=%p\n",
ksig->sig, ksig->ka, ksig->info, oldset, regs);
DBG(1, "%s: sig=%d, ka=%p, info=%p, oldset=%p, regs=%p\n",
__func__, ksig->sig, &ksig->ka, &ksig->info, oldset, regs);
/* Set up the stack frame */
ret = setup_rt_frame(ksig, oldset, regs, in_syscall);
@ -424,8 +394,8 @@ handle_signal(struct ksignal *ksig, struct pt_regs *regs, int in_syscall)
signal_setup_done(ret, ksig, test_thread_flag(TIF_SINGLESTEP) ||
test_thread_flag(TIF_BLOCKSTEP));
DBG(1,KERN_DEBUG "do_signal: Exit (success), regs->gr[28] = %ld\n",
regs->gr[28]);
DBG(1, "%s: Exit (success), regs->gr[28] = %ld\n",
__func__, regs->gr[28]);
}
/*
@ -483,21 +453,27 @@ syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
if (regs->orig_r28)
return;
regs->orig_r28 = 1; /* no more restarts */
DBG(1, "%s: orig_r28 = %ld pid %d r20 %ld\n",
__func__, regs->orig_r28, task_pid_nr(current), regs->gr[20]);
/* Check the return code */
switch (regs->gr[28]) {
case -ERESTART_RESTARTBLOCK:
case -ERESTARTNOHAND:
DBG(1,"ERESTARTNOHAND: returning -EINTR\n");
DBG(1, "%s: ERESTARTNOHAND: returning -EINTR\n", __func__);
regs->gr[28] = -EINTR;
break;
case -ERESTARTSYS:
if (!(ka->sa.sa_flags & SA_RESTART)) {
DBG(1,"ERESTARTSYS: putting -EINTR\n");
DBG(1, "%s: ERESTARTSYS: putting -EINTR pid %d\n",
__func__, task_pid_nr(current));
regs->gr[28] = -EINTR;
break;
}
fallthrough;
case -ERESTARTNOINTR:
DBG(1, "%s: %ld\n", __func__, regs->gr[28]);
check_syscallno_in_delay_branch(regs);
break;
}
@ -509,50 +485,52 @@ insert_restart_trampoline(struct pt_regs *regs)
if (regs->orig_r28)
return;
regs->orig_r28 = 1; /* no more restarts */
switch(regs->gr[28]) {
DBG(2, "%s: gr28 = %ld pid %d\n",
__func__, regs->gr[28], task_pid_nr(current));
switch (regs->gr[28]) {
case -ERESTART_RESTARTBLOCK: {
/* Restart the system call - no handlers present */
unsigned int *usp = (unsigned int *)regs->gr[30];
unsigned long start = (unsigned long) &usp[2];
unsigned long end = (unsigned long) &usp[5];
unsigned long rp;
long err = 0;
/* check that we don't exceed the stack */
if (A(&usp[0]) >= user_addr_max() - 5 * sizeof(int))
return;
/* Setup a trampoline to restart the syscall
* with __NR_restart_syscall
/* Call trampoline in vdso to restart the syscall
* with __NR_restart_syscall.
* Original return addresses are on stack like this:
*
* 0: <return address (orig r31)>
* 4: <2nd half for 64-bit>
* 8: ldw 0(%sp), %r31
* 12: be 0x100(%sr2, %r0)
* 16: ldi __NR_restart_syscall, %r20
*/
#ifdef CONFIG_64BIT
err |= put_user(regs->gr[31] >> 32, &usp[0]);
err |= put_user(regs->gr[31] & 0xffffffff, &usp[1]);
err |= put_user(0x0fc010df, &usp[2]);
#else
err |= put_user(regs->gr[31], &usp[0]);
err |= put_user(0x0fc0109f, &usp[2]);
if (!is_compat_task()) {
err |= put_user(regs->gr[31] >> 32, &usp[0]);
err |= put_user(regs->gr[31] & 0xffffffff, &usp[1]);
rp = VDSO64_SYMBOL(current, restart_syscall);
} else
#endif
err |= put_user(0xe0008200, &usp[3]);
err |= put_user(0x34140000, &usp[4]);
{
err |= put_user(regs->gr[31], &usp[0]);
rp = VDSO32_SYMBOL(current, restart_syscall);
}
WARN_ON(err);
/* flush data/instruction cache for new insns */
flush_user_dcache_range_asm(start, end);
flush_user_icache_range_asm(start, end);
regs->gr[31] = regs->gr[30] + 8;
regs->gr[31] = rp;
DBG(1, "%s: ERESTART_RESTARTBLOCK\n", __func__);
return;
}
case -EINTR:
/* ok, was handled before and should be returned. */
break;
case -ERESTARTNOHAND:
case -ERESTARTSYS:
case -ERESTARTNOINTR:
DBG(1, "%s: Type %ld\n", __func__, regs->gr[28]);
check_syscallno_in_delay_branch(regs);
return;
default:
@ -567,30 +545,35 @@ insert_restart_trampoline(struct pt_regs *regs)
* registers). As noted below, the syscall number gets restored for
* us due to the magic of delayed branching.
*/
asmlinkage void
do_signal(struct pt_regs *regs, long in_syscall)
static void do_signal(struct pt_regs *regs, long in_syscall)
{
struct ksignal ksig;
int restart_syscall;
bool has_handler;
DBG(1,"\ndo_signal: regs=0x%p, sr7 %#lx, in_syscall=%d\n",
regs, regs->sr[7], in_syscall);
has_handler = get_signal(&ksig);
if (get_signal(&ksig)) {
DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]);
restart_syscall = 0;
if (in_syscall)
restart_syscall = 1;
if (has_handler) {
/* Restart a system call if necessary. */
if (in_syscall)
if (restart_syscall)
syscall_restart(regs, &ksig.ka);
handle_signal(&ksig, regs, in_syscall);
DBG(1, "%s: Handled signal pid %d\n",
__func__, task_pid_nr(current));
return;
}
/* Did we come from a system call? */
if (in_syscall)
/* Do we need to restart the system call? */
if (restart_syscall)
insert_restart_trampoline(regs);
DBG(1,"do_signal: Exit (not delivered), regs->gr[28] = %ld\n",
regs->gr[28]);
DBG(1, "%s: Exit (not delivered), regs->gr[28] = %ld orig_r28 = %ld pid %d\n",
__func__, regs->gr[28], regs->orig_r28, task_pid_nr(current));
restore_saved_sigmask();
}

19
arch/parisc/kernel/signal32.h
View File

@ -36,21 +36,12 @@ struct compat_regfile {
compat_int_t rf_sar;
};
#define COMPAT_SIGRETURN_TRAMP 4
#define COMPAT_SIGRESTARTBLOCK_TRAMP 5
#define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + \
COMPAT_SIGRESTARTBLOCK_TRAMP)
struct compat_rt_sigframe {
/* XXX: Must match trampoline size in arch/parisc/kernel/signal.c
Secondary to that it must protect the ERESTART_RESTARTBLOCK
trampoline we left on the stack (we were bad and didn't
change sp so we could run really fast.) */
compat_uint_t tramp[COMPAT_TRAMP_SIZE];
compat_siginfo_t info;
struct compat_ucontext uc;
/* Hidden location of truncated registers, *must* be last. */
struct compat_regfile regs;
unsigned int tramp[2]; /* holds original return address */
compat_siginfo_t info;
struct compat_ucontext uc;
/* Hidden location of truncated registers, *must* be last. */
struct compat_regfile regs;
};
/*

4
arch/parisc/kernel/topology.c
View File

@ -101,8 +101,8 @@ void __init store_cpu_topology(unsigned int cpuid)
update_siblings_masks(cpuid);
pr_info("CPU%u: thread %d, cpu %d, socket %d\n",
cpuid, cpu_topology[cpuid].thread_id,
pr_info("CPU%u: cpu core %d of socket %d\n",
cpuid,
cpu_topology[cpuid].core_id,
cpu_topology[cpuid].socket_id);
}

12
arch/parisc/kernel/traps.c
View File

@ -302,7 +302,10 @@ static void handle_break(struct pt_regs *regs)
parisc_kprobe_break_handler(regs);
return;
}
if (unlikely(iir == PARISC_KPROBES_BREAK_INSN2)) {
parisc_kprobe_ss_handler(regs);
return;
}
#endif
#ifdef CONFIG_KGDB
@ -539,11 +542,6 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
/* Recovery counter trap */
regs->gr[0] &= ~PSW_R;
#ifdef CONFIG_KPROBES
if (parisc_kprobe_ss_handler(regs))
return;
#endif
#ifdef CONFIG_KGDB
if (kgdb_single_step) {
kgdb_handle_exception(0, SIGTRAP, 0, regs);
@ -662,6 +660,8 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
by hand. Technically we need to emulate:
fdc,fdce,pdc,"fic,4f",prober,probeir,probew, probeiw
*/
if (code == 17 && handle_nadtlb_fault(regs))
return;
fault_address = regs->ior;
fault_space = regs->isr;
break;

257
arch/parisc/kernel/unaligned.c
View File

@ -3,14 +3,11 @@
* Unaligned memory access handler
*
* Copyright (C) 2001 Randolph Chung <tausq@debian.org>
* Copyright (C) 2022 Helge Deller <deller@gmx.de>
* Significantly tweaked by LaMont Jones <lamont@debian.org>
*/
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched/signal.h>
#include <linux/sched/debug.h>
#include <linux/signal.h>
#include <linux/ratelimit.h>
#include <linux/uaccess.h>
@ -25,18 +22,7 @@
#define DPRINTF(fmt, args...)
#endif
#ifdef CONFIG_64BIT
#define RFMT "%016lx"
#else
#define RFMT "%08lx"
#endif
#define FIXUP_BRANCH(lbl) \
"\tldil L%%" #lbl ", %%r1\n" \
"\tldo R%%" #lbl "(%%r1), %%r1\n" \
"\tbv,n %%r0(%%r1)\n"
/* If you use FIXUP_BRANCH, then you must list this clobber */
#define FIXUP_BRANCH_CLOBBER "r1"
#define RFMT "%#08lx"
/* 1111 1100 0000 0000 0001 0011 1100 0000 */
#define OPCODE1(a,b,c) ((a)<<26|(b)<<12|(c)<<6)
@ -114,37 +100,30 @@
#define IM14(i) IM((i),14)
#define ERR_NOTHANDLED -1
#define ERR_PAGEFAULT -2
int unaligned_enabled __read_mostly = 1;
static int emulate_ldh(struct pt_regs *regs, int toreg)
{
unsigned long saddr = regs->ior;
unsigned long val = 0;
int ret;
unsigned long val = 0, temp1;
ASM_EXCEPTIONTABLE_VAR(ret);
DPRINTF("load " RFMT ":" RFMT " to r%d for 2 bytes\n",
regs->isr, regs->ior, toreg);
__asm__ __volatile__ (
" mtsp %4, %%sr1\n"
"1: ldbs 0(%%sr1,%3), %%r20\n"
"1: ldbs 0(%%sr1,%3), %2\n"
"2: ldbs 1(%%sr1,%3), %0\n"
" depw %%r20, 23, 24, %0\n"
" copy %%r0, %1\n"
" depw %2, 23, 24, %0\n"
"3: \n"
" .section .fixup,\"ax\"\n"
"4: ldi -2, %1\n"
FIXUP_BRANCH(3b)
" .previous\n"
ASM_EXCEPTIONTABLE_ENTRY(1b, 4b)
ASM_EXCEPTIONTABLE_ENTRY(2b, 4b)
: "=r" (val), "=r" (ret)
: "0" (val), "r" (saddr), "r" (regs->isr)
: "r20", FIXUP_BRANCH_CLOBBER );
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 3b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 3b)
: "+r" (val), "+r" (ret), "=&r" (temp1)
: "r" (saddr), "r" (regs->isr) );
DPRINTF("val = 0x" RFMT "\n", val);
DPRINTF("val = " RFMT "\n", val);
if (toreg)
regs->gr[toreg] = val;
@ -155,34 +134,28 @@ static int emulate_ldh(struct pt_regs *regs, int toreg)
static int emulate_ldw(struct pt_regs *regs, int toreg, int flop)
{
unsigned long saddr = regs->ior;
unsigned long val = 0;
int ret;
unsigned long val = 0, temp1, temp2;
ASM_EXCEPTIONTABLE_VAR(ret);
DPRINTF("load " RFMT ":" RFMT " to r%d for 4 bytes\n",
regs->isr, regs->ior, toreg);
__asm__ __volatile__ (
" zdep %3,28,2,%%r19\n" /* r19=(ofs&3)*8 */
" mtsp %4, %%sr1\n"
" depw %%r0,31,2,%3\n"
"1: ldw 0(%%sr1,%3),%0\n"
"2: ldw 4(%%sr1,%3),%%r20\n"
" subi 32,%%r19,%%r19\n"
" mtctl %%r19,11\n"
" vshd %0,%%r20,%0\n"
" copy %%r0, %1\n"
" zdep %4,28,2,%2\n" /* r19=(ofs&3)*8 */
" mtsp %5, %%sr1\n"
" depw %%r0,31,2,%4\n"
"1: ldw 0(%%sr1,%4),%0\n"
"2: ldw 4(%%sr1,%4),%3\n"
" subi 32,%4,%2\n"
" mtctl %2,11\n"
" vshd %0,%3,%0\n"
"3: \n"
" .section .fixup,\"ax\"\n"
"4: ldi -2, %1\n"
FIXUP_BRANCH(3b)
" .previous\n"
ASM_EXCEPTIONTABLE_ENTRY(1b, 4b)
ASM_EXCEPTIONTABLE_ENTRY(2b, 4b)
: "=r" (val), "=r" (ret)
: "0" (val), "r" (saddr), "r" (regs->isr)
: "r19", "r20", FIXUP_BRANCH_CLOBBER );
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 3b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 3b)
: "+r" (val), "+r" (ret), "=&r" (temp1), "=&r" (temp2)
: "r" (saddr), "r" (regs->isr) );
DPRINTF("val = 0x" RFMT "\n", val);
DPRINTF("val = " RFMT "\n", val);
if (flop)
((__u32*)(regs->fr))[toreg] = val;
@ -195,16 +168,15 @@ static int emulate_ldd(struct pt_regs *regs, int toreg, int flop)
{
unsigned long saddr = regs->ior;
__u64 val = 0;
int ret;
ASM_EXCEPTIONTABLE_VAR(ret);
DPRINTF("load " RFMT ":" RFMT " to r%d for 8 bytes\n",
regs->isr, regs->ior, toreg);
#ifdef CONFIG_PA20
#ifndef CONFIG_64BIT
if (!flop)
return -1;
#endif
if (!IS_ENABLED(CONFIG_64BIT) && !flop)
return ERR_NOTHANDLED;
#ifdef CONFIG_64BIT
__asm__ __volatile__ (
" depd,z %3,60,3,%%r19\n" /* r19=(ofs&7)*8 */
" mtsp %4, %%sr1\n"
@ -214,44 +186,32 @@ static int emulate_ldd(struct pt_regs *regs, int toreg, int flop)
" subi 64,%%r19,%%r19\n"
" mtsar %%r19\n"
" shrpd %0,%%r20,%%sar,%0\n"
" copy %%r0, %1\n"
"3: \n"
" .section .fixup,\"ax\"\n"
"4: ldi -2, %1\n"
FIXUP_BRANCH(3b)
" .previous\n"
ASM_EXCEPTIONTABLE_ENTRY(1b,4b)
ASM_EXCEPTIONTABLE_ENTRY(2b,4b)
: "=r" (val), "=r" (ret)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 3b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 3b)
: "=r" (val), "+r" (ret)
: "0" (val), "r" (saddr), "r" (regs->isr)
: "r19", "r20", FIXUP_BRANCH_CLOBBER );
: "r19", "r20" );
#else
{
unsigned long valh=0,vall=0;
unsigned long shift, temp1;
__asm__ __volatile__ (
" zdep %5,29,2,%%r19\n" /* r19=(ofs&3)*8 */
" mtsp %6, %%sr1\n"
" dep %%r0,31,2,%5\n"
"1: ldw 0(%%sr1,%5),%0\n"
"2: ldw 4(%%sr1,%5),%1\n"
"3: ldw 8(%%sr1,%5),%%r20\n"
" subi 32,%%r19,%%r19\n"
" mtsar %%r19\n"
" vshd %0,%1,%0\n"
" vshd %1,%%r20,%1\n"
" copy %%r0, %2\n"
" zdep %2,29,2,%3\n" /* r19=(ofs&3)*8 */
" mtsp %5, %%sr1\n"
" dep %%r0,31,2,%2\n"
"1: ldw 0(%%sr1,%2),%0\n"
"2: ldw 4(%%sr1,%2),%R0\n"
"3: ldw 8(%%sr1,%2),%4\n"
" subi 32,%3,%3\n"
" mtsar %3\n"
" vshd %0,%R0,%0\n"
" vshd %R0,%4,%R0\n"
"4: \n"
" .section .fixup,\"ax\"\n"
"5: ldi -2, %2\n"
FIXUP_BRANCH(4b)
" .previous\n"
ASM_EXCEPTIONTABLE_ENTRY(1b,5b)
ASM_EXCEPTIONTABLE_ENTRY(2b,5b)
ASM_EXCEPTIONTABLE_ENTRY(3b,5b)
: "=r" (valh), "=r" (vall), "=r" (ret)
: "0" (valh), "1" (vall), "r" (saddr), "r" (regs->isr)
: "r19", "r20", FIXUP_BRANCH_CLOBBER );
val=((__u64)valh<<32)|(__u64)vall;
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 4b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 4b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(3b, 4b)
: "+r" (val), "+r" (ret), "+r" (saddr), "=&r" (shift), "=&r" (temp1)
: "r" (regs->isr) );
}
#endif
@ -267,31 +227,25 @@ static int emulate_ldd(struct pt_regs *regs, int toreg, int flop)
static int emulate_sth(struct pt_regs *regs, int frreg)
{
unsigned long val = regs->gr[frreg];
int ret;
unsigned long val = regs->gr[frreg], temp1;
ASM_EXCEPTIONTABLE_VAR(ret);
if (!frreg)
val = 0;
DPRINTF("store r%d (0x" RFMT ") to " RFMT ":" RFMT " for 2 bytes\n", frreg,
DPRINTF("store r%d (" RFMT ") to " RFMT ":" RFMT " for 2 bytes\n", frreg,
val, regs->isr, regs->ior);
__asm__ __volatile__ (
" mtsp %3, %%sr1\n"
" extrw,u %1, 23, 8, %%r19\n"
"1: stb %1, 1(%%sr1, %2)\n"
"2: stb %%r19, 0(%%sr1, %2)\n"
" copy %%r0, %0\n"
" mtsp %4, %%sr1\n"
" extrw,u %2, 23, 8, %1\n"
"1: stb %1, 0(%%sr1, %3)\n"
"2: stb %2, 1(%%sr1, %3)\n"
"3: \n"
" .section .fixup,\"ax\"\n"
"4: ldi -2, %0\n"
FIXUP_BRANCH(3b)
" .previous\n"
ASM_EXCEPTIONTABLE_ENTRY(1b,4b)
ASM_EXCEPTIONTABLE_ENTRY(2b,4b)
: "=r" (ret)
: "r" (val), "r" (regs->ior), "r" (regs->isr)
: "r19", FIXUP_BRANCH_CLOBBER );
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 3b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 3b)
: "+r" (ret), "=&r" (temp1)
: "r" (val), "r" (regs->ior), "r" (regs->isr) );
return ret;
}
@ -299,7 +253,7 @@ static int emulate_sth(struct pt_regs *regs, int frreg)
static int emulate_stw(struct pt_regs *regs, int frreg, int flop)
{
unsigned long val;
int ret;
ASM_EXCEPTIONTABLE_VAR(ret);
if (flop)
val = ((__u32*)(regs->fr))[frreg];
@ -308,7 +262,7 @@ static int emulate_stw(struct pt_regs *regs, int frreg, int flop)
else
val = 0;
DPRINTF("store r%d (0x" RFMT ") to " RFMT ":" RFMT " for 4 bytes\n", frreg,
DPRINTF("store r%d (" RFMT ") to " RFMT ":" RFMT " for 4 bytes\n", frreg,
val, regs->isr, regs->ior);
@ -328,24 +282,19 @@ static int emulate_stw(struct pt_regs *regs, int frreg, int flop)
" or %%r1, %%r21, %%r21\n"
" stw %%r20,0(%%sr1,%2)\n"
" stw %%r21,4(%%sr1,%2)\n"
" copy %%r0, %0\n"
"3: \n"
" .section .fixup,\"ax\"\n"
"4: ldi -2, %0\n"
FIXUP_BRANCH(3b)
" .previous\n"
ASM_EXCEPTIONTABLE_ENTRY(1b,4b)
ASM_EXCEPTIONTABLE_ENTRY(2b,4b)
: "=r" (ret)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 3b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 3b)
: "+r" (ret)
: "r" (val), "r" (regs->ior), "r" (regs->isr)
: "r19", "r20", "r21", "r22", "r1", FIXUP_BRANCH_CLOBBER );
: "r19", "r20", "r21", "r22", "r1" );
return ret;
}
static int emulate_std(struct pt_regs *regs, int frreg, int flop)
{
__u64 val;
int ret;
ASM_EXCEPTIONTABLE_VAR(ret);
if (flop)
val = regs->fr[frreg];
@ -357,11 +306,10 @@ static int emulate_std(struct pt_regs *regs, int frreg, int flop)
DPRINTF("store r%d (0x%016llx) to " RFMT ":" RFMT " for 8 bytes\n", frreg,
val, regs->isr, regs->ior);
#ifdef CONFIG_PA20
#ifndef CONFIG_64BIT
if (!flop)
return -1;
#endif
if (!IS_ENABLED(CONFIG_64BIT) && !flop)
return ERR_NOTHANDLED;
#ifdef CONFIG_64BIT
__asm__ __volatile__ (
" mtsp %3, %%sr1\n"
" depd,z %2, 60, 3, %%r19\n"
@ -378,19 +326,14 @@ static int emulate_std(struct pt_regs *regs, int frreg, int flop)
" or %%r1, %%r21, %%r21\n"
"3: std %%r20,0(%%sr1,%2)\n"
"4: std %%r21,8(%%sr1,%2)\n"
" copy %%r0, %0\n"
"5: \n"
" .section .fixup,\"ax\"\n"
"6: ldi -2, %0\n"
FIXUP_BRANCH(5b)
" .previous\n"
ASM_EXCEPTIONTABLE_ENTRY(1b,6b)
ASM_EXCEPTIONTABLE_ENTRY(2b,6b)
ASM_EXCEPTIONTABLE_ENTRY(3b,6b)
ASM_EXCEPTIONTABLE_ENTRY(4b,6b)
: "=r" (ret)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 5b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 5b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(3b, 5b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(4b, 5b)
: "+r" (ret)
: "r" (val), "r" (regs->ior), "r" (regs->isr)
: "r19", "r20", "r21", "r22", "r1", FIXUP_BRANCH_CLOBBER );
: "r19", "r20", "r21", "r22", "r1" );
#else
{
unsigned long valh=(val>>32),vall=(val&0xffffffffl);
@ -412,20 +355,15 @@ static int emulate_std(struct pt_regs *regs, int frreg, int flop)
"3: stw %1,0(%%sr1,%3)\n"
"4: stw %%r1,4(%%sr1,%3)\n"
"5: stw %2,8(%%sr1,%3)\n"
" copy %%r0, %0\n"
"6: \n"
" .section .fixup,\"ax\"\n"
"7: ldi -2, %0\n"
FIXUP_BRANCH(6b)
" .previous\n"
ASM_EXCEPTIONTABLE_ENTRY(1b,7b)
ASM_EXCEPTIONTABLE_ENTRY(2b,7b)
ASM_EXCEPTIONTABLE_ENTRY(3b,7b)
ASM_EXCEPTIONTABLE_ENTRY(4b,7b)
ASM_EXCEPTIONTABLE_ENTRY(5b,7b)
: "=r" (ret)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 6b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 6b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(3b, 6b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(4b, 6b)
ASM_EXCEPTIONTABLE_ENTRY_EFAULT(5b, 6b)
: "+r" (ret)
: "r" (valh), "r" (vall), "r" (regs->ior), "r" (regs->isr)
: "r19", "r20", "r21", "r1", FIXUP_BRANCH_CLOBBER );
: "r19", "r20", "r21", "r1" );
}
#endif
@ -438,7 +376,6 @@ void handle_unaligned(struct pt_regs *regs)
unsigned long newbase = R1(regs->iir)?regs->gr[R1(regs->iir)]:0;
int modify = 0;
int ret = ERR_NOTHANDLED;
register int flop=0; /* true if this is a flop */
__inc_irq_stat(irq_unaligned_count);
@ -450,10 +387,10 @@ void handle_unaligned(struct pt_regs *regs)
if (!(current->thread.flags & PARISC_UAC_NOPRINT) &&
__ratelimit(&ratelimit)) {
char buf[256];
sprintf(buf, "%s(%d): unaligned access to 0x" RFMT " at ip=0x" RFMT "\n",
current->comm, task_pid_nr(current), regs->ior, regs->iaoq[0]);
printk(KERN_WARNING "%s", buf);
printk(KERN_WARNING "%s(%d): unaligned access to " RFMT
" at ip " RFMT " (iir " RFMT ")\n",
current->comm, task_pid_nr(current), regs->ior,
regs->iaoq[0], regs->iir);
#ifdef DEBUG_UNALIGNED
show_regs(regs);
#endif
@ -547,7 +484,7 @@ void handle_unaligned(struct pt_regs *regs)
ret = emulate_stw(regs, R2(regs->iir),0);
break;
#ifdef CONFIG_PA20
#ifdef CONFIG_64BIT
case OPCODE_LDD_I:
case OPCODE_LDDA_I:
case OPCODE_LDD_S:
@ -565,13 +502,11 @@ void handle_unaligned(struct pt_regs *regs)
case OPCODE_FLDWS:
case OPCODE_FLDWXR:
case OPCODE_FLDWSR:
flop=1;
ret = emulate_ldw(regs,FR3(regs->iir),1);
break;
case OPCODE_FLDDX:
case OPCODE_FLDDS:
flop=1;
ret = emulate_ldd(regs,R3(regs->iir),1);
break;
@ -579,13 +514,11 @@ void handle_unaligned(struct pt_regs *regs)
case OPCODE_FSTWS:
case OPCODE_FSTWXR:
case OPCODE_FSTWSR:
flop=1;
ret = emulate_stw(regs,FR3(regs->iir),1);
break;
case OPCODE_FSTDX:
case OPCODE_FSTDS:
flop=1;
ret = emulate_std(regs,R3(regs->iir),1);
break;
@ -599,14 +532,12 @@ void handle_unaligned(struct pt_regs *regs)
switch (regs->iir & OPCODE2_MASK)
{
case OPCODE_FLDD_L:
flop=1;
ret = emulate_ldd(regs,R2(regs->iir),1);
break;
case OPCODE_FSTD_L:
flop=1;
ret = emulate_std(regs, R2(regs->iir),1);
break;
#ifdef CONFIG_PA20
#ifdef CONFIG_64BIT
case OPCODE_LDD_L:
ret = emulate_ldd(regs, R2(regs->iir),0);
break;
@ -618,7 +549,6 @@ void handle_unaligned(struct pt_regs *regs)
switch (regs->iir & OPCODE3_MASK)
{
case OPCODE_FLDW_L:
flop=1;
ret = emulate_ldw(regs, R2(regs->iir), 1);
break;
case OPCODE_LDW_M:
@ -626,7 +556,6 @@ void handle_unaligned(struct pt_regs *regs)
break;
case OPCODE_FSTW_L:
flop=1;
ret = emulate_stw(regs, R2(regs->iir),1);
break;
case OPCODE_STW_M:
@ -673,7 +602,7 @@ void handle_unaligned(struct pt_regs *regs)
printk(KERN_CRIT "Unaligned handler failed, ret = %d\n", ret);
die_if_kernel("Unaligned data reference", regs, 28);
if (ret == ERR_PAGEFAULT)
if (ret == -EFAULT)
{
force_sig_fault(SIGSEGV, SEGV_MAPERR,
(void __user *)regs->ior);

122
arch/parisc/kernel/vdso.c Normal file
View File

@ -0,0 +1,122 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2022 Helge Deller <deller@gmx.de>
*
* based on arch/s390/kernel/vdso.c which is
* Copyright IBM Corp. 2008
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/elf.h>
#include <linux/timekeeper_internal.h>
#include <linux/compat.h>
#include <linux/nsproxy.h>
#include <linux/time_namespace.h>
#include <linux/random.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/sections.h>
#include <asm/vdso.h>
#include <asm/cacheflush.h>
extern char vdso32_start, vdso32_end;
extern char vdso64_start, vdso64_end;
static int vdso_mremap(const struct vm_special_mapping *sm,
struct vm_area_struct *vma)
{
current->mm->context.vdso_base = vma->vm_start;
return 0;
}
#ifdef CONFIG_64BIT
static struct vm_special_mapping vdso64_mapping = {
.name = "[vdso]",
.mremap = vdso_mremap,
};
#endif
static struct vm_special_mapping vdso32_mapping = {
.name = "[vdso]",
.mremap = vdso_mremap,
};
/*
* This is called from binfmt_elf, we create the special vma for the
* vDSO and insert it into the mm struct tree
*/
int arch_setup_additional_pages(struct linux_binprm *bprm,
int executable_stack)
{
unsigned long vdso_text_start, vdso_text_len, map_base;
struct vm_special_mapping *vdso_mapping;
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
int rc;
if (mmap_write_lock_killable(mm))
return -EINTR;
#ifdef CONFIG_64BIT
if (!is_compat_task()) {
vdso_text_len = &vdso64_end - &vdso64_start;
vdso_mapping = &vdso64_mapping;
} else
#endif
{
vdso_text_len = &vdso32_end - &vdso32_start;
vdso_mapping = &vdso32_mapping;
}
map_base = mm->mmap_base;
if (current->flags & PF_RANDOMIZE)
map_base -= (get_random_int() & 0x1f) * PAGE_SIZE;
vdso_text_start = get_unmapped_area(NULL, map_base, vdso_text_len, 0, 0);
/* VM_MAYWRITE for COW so gdb can set breakpoints */
vma = _install_special_mapping(mm, vdso_text_start, vdso_text_len,
VM_READ|VM_EXEC|
VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC,
vdso_mapping);
if (IS_ERR(vma)) {
do_munmap(mm, vdso_text_start, PAGE_SIZE, NULL);
rc = PTR_ERR(vma);
} else {
current->mm->context.vdso_base = vdso_text_start;
rc = 0;
}
mmap_write_unlock(mm);
return rc;
}
static struct page ** __init vdso_setup_pages(void *start, void *end)
{
int pages = (end - start) >> PAGE_SHIFT;
struct page **pagelist;
int i;
pagelist = kcalloc(pages + 1, sizeof(struct page *), GFP_KERNEL);
if (!pagelist)
panic("%s: Cannot allocate page list for VDSO", __func__);
for (i = 0; i < pages; i++)
pagelist[i] = virt_to_page(start + i * PAGE_SIZE);
return pagelist;
}
static int __init vdso_init(void)
{
#ifdef CONFIG_64BIT
vdso64_mapping.pages = vdso_setup_pages(&vdso64_start, &vdso64_end);
#endif
if (IS_ENABLED(CONFIG_COMPAT) || !IS_ENABLED(CONFIG_64BIT))
vdso32_mapping.pages = vdso_setup_pages(&vdso32_start, &vdso32_end);
return 0;
}
arch_initcall(vdso_init);

53
arch/parisc/kernel/vdso32/Makefile Normal file
View File

@ -0,0 +1,53 @@
# List of files in the vdso, has to be asm only for now
obj-vdso32 = note.o sigtramp.o restart_syscall.o
# Build rules
targets := $(obj-vdso32) vdso32.so
obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
ccflags-y := -shared -fno-common -fbuiltin -mno-fast-indirect-calls -O2 -mno-long-calls
# -march=1.1 -mschedule=7100LC
ccflags-y += -nostdlib -Wl,-soname=linux-vdso32.so.1 \
$(call ld-option, -Wl$(comma)--hash-style=sysv)
asflags-y := -D__VDSO32__ -s
KBUILD_AFLAGS += -DBUILD_VDSO
KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
VDSO_LIBGCC := $(shell $(CROSS32CC) -print-libgcc-file-name)
obj-y += vdso32_wrapper.o
extra-y += vdso32.lds
CPPFLAGS_vdso32.lds += -P -C # -U$(ARCH)
$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so FORCE
# Force dependency (incbin is bad)
# link rule for the .so file, .lds has to be first
$(obj)/vdso32.so: $(src)/vdso32.lds $(obj-vdso32) $(obj-cvdso32) $(VDSO_LIBGCC)
$(call if_changed,vdso32ld)
# assembly rules for the .S files
$(obj-vdso32): %.o: %.S FORCE
$(call if_changed_dep,vdso32as)
$(obj-cvdso32): %.o: %.c FORCE
$(call if_changed_dep,vdso32cc)
# actual build commands
quiet_cmd_vdso32ld = VDSO32L $@
cmd_vdso32ld = $(CROSS32CC) $(c_flags) -Wl,-T $^ -o $@
quiet_cmd_vdso32as = VDSO32A $@
cmd_vdso32as = $(CROSS32CC) $(a_flags) -c -o $@ $<
quiet_cmd_vdso32cc = VDSO32C $@
cmd_vdso32cc = $(CROSS32CC) $(c_flags) -c -fPIC -mno-fast-indirect-calls -o $@ $<
# Generate VDSO offsets using helper script
gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
quiet_cmd_vdsosym = VDSOSYM $@
cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
include/generated/vdso32-offsets.h: $(obj)/vdso32.so FORCE
$(call if_changed,vdsosym)

15
arch/parisc/kernel/vdso32/gen_vdso_offsets.sh Executable file
View File

@ -0,0 +1,15 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# Match symbols in the DSO that look like VDSO_*; produce a header file
# of constant offsets into the shared object.
#
# Doing this inside the Makefile will break the $(filter-out) function,
# causing Kbuild to rebuild the vdso-offsets header file every time.
#
# Inspired by arm64 version.
#
LC_ALL=C
sed -n 's/\([0-9a-f]*\) . __kernel_\(.*\)/\#define vdso32_offset_\2\t0x\1/p'

26
arch/parisc/kernel/vdso32/note.S Normal file
View File

@ -0,0 +1,26 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
* Here we can supply some information useful to userland.
*/
#include <linux/uts.h>
#include <linux/version.h>
#define ASM_ELF_NOTE_BEGIN(name, flags, vendor, type) \
.section name, flags; \
.balign 4; \
.long 1f - 0f; /* name length */ \
.long 3f - 2f; /* data length */ \
.long type; /* note type */ \
0: .asciz vendor; /* vendor name */ \
1: .balign 4; \
2:
#define ASM_ELF_NOTE_END \
3: .balign 4; /* pad out section */ \
.previous
ASM_ELF_NOTE_BEGIN(".note.kernel-version", "a", UTS_SYSNAME, 0)
.long LINUX_VERSION_CODE
ASM_ELF_NOTE_END

32
arch/parisc/kernel/vdso32/restart_syscall.S Normal file
View File

@ -0,0 +1,32 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Syscall restart trampoline for 32 and 64 bits processes.
*
* Copyright (C) 2018-2022 Helge Deller <deller@gmx.de>
* Copyright (C) 2022 John David Anglin <dave.anglin@bell.net>
*/
#include <asm/unistd.h>
#include <asm/vdso.h>
#include <linux/linkage.h>
.text
ENTRY_CFI(__kernel_restart_syscall)
/*
* Setup a trampoline to restart the syscall
* with __NR_restart_syscall
*/
/* load return pointer */
#if defined(__VDSO64__)
ldd 0(%sp), %r31
#elif defined(__VDSO32__)
ldw 0(%sp), %r31
#endif
be 0x100(%sr2, %r0)
ldi __NR_restart_syscall, %r20
ENDPROC_CFI(__kernel_restart_syscall)

195
arch/parisc/kernel/vdso32/sigtramp.S Normal file
View File

@ -0,0 +1,195 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Signal trampolines for 32 bit processes.
*
* Copyright (C) 2006 Randolph Chung <tausq@debian.org>
* Copyright (C) 2018-2022 Helge Deller <deller@gmx.de>
* Copyright (C) 2022 John David Anglin <dave.anglin@bell.net>
*/
#include <asm/unistd.h>
#include <linux/linkage.h>
#include <generated/asm-offsets.h>
.text
/* Gdb expects the trampoline is on the stack and the pc is offset from
a 64-byte boundary by 0, 4 or 5 instructions. Since the vdso trampoline
is not on the stack, we need a new variant with different offsets and
data to tell gdb where to find the signal context on the stack.
Here we put the offset to the context data at the start of the trampoline
region and offset the first trampoline by 2 instructions. Please do
not change the trampoline as the code in gdb depends on the following
instruction sequence exactly.
*/
.align 64
.word SIGFRAME_CONTEXT_REGS32
/* The nop here is a hack. The dwarf2 unwind routines subtract 1 from
the return address to get an address in the middle of the presumed
call instruction. Since we don't have a call here, we artifically
extend the range covered by the unwind info by adding a nop before
the real start.
*/
nop
.globl __kernel_sigtramp_rt
.type __kernel_sigtramp_rt, @function
__kernel_sigtramp_rt:
.proc
.callinfo FRAME=ASM_SIGFRAME_SIZE32,CALLS,SAVE_RP
.entry
.Lsigrt_start = . - 4
0: ldi 0, %r25 /* (in_syscall=0) */
ldi __NR_rt_sigreturn, %r20
ble 0x100(%sr2, %r0)
nop
1: ldi 1, %r25 /* (in_syscall=1) */
ldi __NR_rt_sigreturn, %r20
ble 0x100(%sr2, %r0)
nop
.Lsigrt_end:
.exit
.procend
.size __kernel_sigtramp_rt,.-__kernel_sigtramp_rt
.section .eh_frame,"a",@progbits
/* This is where the mcontext_t struct can be found on the stack. */
#define PTREGS SIGFRAME_CONTEXT_REGS32 /* 32-bit process offset is -672 */
/* Register REGNO can be found at offset OFS of the mcontext_t structure. */
.macro rsave regno,ofs
.byte 0x05 /* DW_CFA_offset_extended */
.uleb128 \regno; /* regno */
.uleb128 \ofs /* factored offset */
.endm
.Lcie:
.long .Lcie_end - .Lcie_start
.Lcie_start:
.long 0 /* CIE ID */
.byte 1 /* Version number */
.stringz "zRS" /* NUL-terminated augmentation string */
.uleb128 4 /* Code alignment factor */
.sleb128 4 /* Data alignment factor */
.byte 89 /* Return address register column, iaoq[0] */
.uleb128 1 /* Augmentation value length */
.byte 0x1b /* DW_EH_PE_pcrel | DW_EH_PE_sdata4. */
.byte 0x0f /* DW_CFA_def_cfa_expresion */
.uleb128 9f - 1f /* length */
1:
.byte 0x8e /* DW_OP_breg30 */
.sleb128 PTREGS
9:
.balign 4
.Lcie_end:
.long .Lfde0_end - .Lfde0_start
.Lfde0_start:
.long .Lfde0_start - .Lcie /* CIE pointer. */
.long .Lsigrt_start - . /* PC start, length */
.long .Lsigrt_end - .Lsigrt_start
.uleb128 0 /* Augmentation */
/* General registers */
rsave 1, 2
rsave 2, 3
rsave 3, 4
rsave 4, 5
rsave 5, 6
rsave 6, 7
rsave 7, 8
rsave 8, 9
rsave 9, 10
rsave 10, 11
rsave 11, 12
rsave 12, 13
rsave 13, 14
rsave 14, 15
rsave 15, 16
rsave 16, 17
rsave 17, 18
rsave 18, 19
rsave 19, 20
rsave 20, 21
rsave 21, 22
rsave 22, 23
rsave 23, 24
rsave 24, 25
rsave 25, 26
rsave 26, 27
rsave 27, 28
rsave 28, 29
rsave 29, 30
rsave 30, 31
rsave 31, 32
/* Floating-point registers */
rsave 32, 42
rsave 33, 43
rsave 34, 44
rsave 35, 45
rsave 36, 46
rsave 37, 47
rsave 38, 48
rsave 39, 49
rsave 40, 50
rsave 41, 51
rsave 42, 52
rsave 43, 53
rsave 44, 54
rsave 45, 55
rsave 46, 56
rsave 47, 57
rsave 48, 58
rsave 49, 59
rsave 50, 60
rsave 51, 61
rsave 52, 62
rsave 53, 63
rsave 54, 64
rsave 55, 65
rsave 56, 66
rsave 57, 67
rsave 58, 68
rsave 59, 69
rsave 60, 70
rsave 61, 71
rsave 62, 72
rsave 63, 73
rsave 64, 74
rsave 65, 75
rsave 66, 76
rsave 67, 77
rsave 68, 78
rsave 69, 79
rsave 70, 80
rsave 71, 81
rsave 72, 82
rsave 73, 83
rsave 74, 84
rsave 75, 85
rsave 76, 86
rsave 77, 87
rsave 78, 88
rsave 79, 89
rsave 80, 90
rsave 81, 91
rsave 82, 92
rsave 83, 93
rsave 84, 94
rsave 85, 95
rsave 86, 96
rsave 87, 97
/* SAR register */
rsave 88, 102
/* iaoq[0] return address register */
rsave 89, 100
.balign 4
.Lfde0_end:

111
arch/parisc/kernel/vdso32/vdso32.lds.S Normal file
View File

@ -0,0 +1,111 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* This is the infamous ld script for the 32 bits vdso library
*/
#include <asm/vdso.h>
#include <asm/page.h>
/* Default link addresses for the vDSOs */
OUTPUT_FORMAT("elf32-hppa-linux")
OUTPUT_ARCH(hppa)
ENTRY(_start)
SECTIONS
{
. = VDSO_LBASE + SIZEOF_HEADERS;
.hash : { *(.hash) } :text
.gnu.hash : { *(.gnu.hash) }
.dynsym : { *(.dynsym) }
.dynstr : { *(.dynstr) }
.gnu.version : { *(.gnu.version) }
.gnu.version_d : { *(.gnu.version_d) }
.gnu.version_r : { *(.gnu.version_r) }
.note : { *(.note.*) } :text :note
. = ALIGN (16);
.text :
{
*(.text .stub .text.* .gnu.linkonce.t.*)
}
PROVIDE (__etext = .);
PROVIDE (_etext = .);
PROVIDE (etext = .);
/* Other stuff is appended to the text segment: */
.rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
.rodata1 : { *(.rodata1) }
.rodata2 : { *(.data.rel.ro) }
.eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
.eh_frame : { KEEP (*(.eh_frame)) } :text
.gcc_except_table : { *(.gcc_except_table) }
.fixup : { *(.fixup) }
.dynamic : { *(.dynamic) } :text :dynamic
.plt : { *(.plt) }
.got : { *(.got) }
_end = .;
__end = .;
PROVIDE (end = .);
/* Stabs debugging sections are here too
*/
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
.debug 0 : { *(.debug) }
.line 0 : { *(.line) }
.debug_srcinfo 0 : { *(.debug_srcinfo) }
.debug_sfnames 0 : { *(.debug_sfnames) }
.debug_aranges 0 : { *(.debug_aranges) }
.debug_pubnames 0 : { *(.debug_pubnames) }
.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_line 0 : { *(.debug_line) }
.debug_frame 0 : { *(.debug_frame) }
.debug_str 0 : { *(.debug_str) }
.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
.debug_weaknames 0 : { *(.debug_weaknames) }
.debug_funcnames 0 : { *(.debug_funcnames) }
.debug_typenames 0 : { *(.debug_typenames) }
.debug_varnames 0 : { *(.debug_varnames) }
/DISCARD/ : { *(.note.GNU-stack) }
/DISCARD/ : { *(.data .data.* .gnu.linkonce.d.* .sdata*) }
/DISCARD/ : { *(.bss .sbss .dynbss .dynsbss) }
}
PHDRS
{
text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
note PT_NOTE FLAGS(4); /* PF_R */
dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
eh_frame_hdr PT_GNU_EH_FRAME;
}
/*
* This controls what symbols we export from the DSO.
*/
VERSION
{
VDSO_VERSION_STRING {
global:
__kernel_sigtramp_rt32;
__kernel_restart_syscall32;
local: *;
};
}

14
arch/parisc/kernel/vdso32/vdso32_wrapper.S Normal file
View File

@ -0,0 +1,14 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/linkage.h>
#include <asm/page.h>
__PAGE_ALIGNED_DATA
.globl vdso32_start, vdso32_end
.balign PAGE_SIZE
vdso32_start:
.incbin "arch/parisc/kernel/vdso32/vdso32.so"
.balign PAGE_SIZE
vdso32_end:
.previous

48
arch/parisc/kernel/vdso64/Makefile Normal file
View File

@ -0,0 +1,48 @@
# List of files in the vdso, has to be asm only for now
obj-vdso64 = note.o sigtramp.o restart_syscall.o
# Build rules
targets := $(obj-vdso64) vdso64.so
obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
ccflags-y := -shared -fno-common -fno-builtin
ccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
$(call ld-option, -Wl$(comma)--hash-style=sysv)
asflags-y := -D__VDSO64__ -s
KBUILD_AFLAGS += -DBUILD_VDSO
KBUILD_CFLAGS += -DBUILD_VDSO -DDISABLE_BRANCH_PROFILING
VDSO_LIBGCC := $(shell $(CC) -print-libgcc-file-name)
obj-y += vdso64_wrapper.o
extra-y += vdso64.lds
CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so FORCE
# Force dependency (incbin is bad)
# link rule for the .so file, .lds has to be first
$(obj)/vdso64.so: $(src)/vdso64.lds $(obj-vdso64) $(VDSO_LIBGCC)
$(call if_changed,vdso64ld)
# assembly rules for the .S files
$(obj-vdso64): %.o: %.S FORCE
$(call if_changed_dep,vdso64as)
# actual build commands
quiet_cmd_vdso64ld = VDSO64L $@
cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
quiet_cmd_vdso64as = VDSO64A $@
cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
# Generate VDSO offsets using helper script
gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh
quiet_cmd_vdsosym = VDSOSYM $@
cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
include/generated/vdso64-offsets.h: $(obj)/vdso64.so FORCE
$(call if_changed,vdsosym)

15
arch/parisc/kernel/vdso64/gen_vdso_offsets.sh Executable file
View File

@ -0,0 +1,15 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
#
# Match symbols in the DSO that look like VDSO_*; produce a header file
# of constant offsets into the shared object.
#
# Doing this inside the Makefile will break the $(filter-out) function,
# causing Kbuild to rebuild the vdso-offsets header file every time.
#
# Inspired by arm64 version.
#
LC_ALL=C
sed -n 's/\([0-9a-f]*\) . __kernel_\(.*\)/\#define vdso64_offset_\2\t0x\1/p'

2
arch/parisc/kernel/vdso64/note.S Normal file
View File

@ -0,0 +1,2 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include "../vdso32/note.S"

3
arch/parisc/kernel/vdso64/restart_syscall.S Normal file
View File

@ -0,0 +1,3 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include "../vdso32/restart_syscall.S"

166
arch/parisc/kernel/vdso64/sigtramp.S Normal file
View File

@ -0,0 +1,166 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Signal trampolines for 64 bit processes.
*
* Copyright (C) 2006 Randolph Chung <tausq@debian.org>
* Copyright (C) 2018-2022 Helge Deller <deller@gmx.de>
* Copyright (C) 2022 John David Anglin <dave.anglin@bell.net>
*/
#include <asm/unistd.h>
#include <linux/linkage.h>
#include <generated/asm-offsets.h>
.text
/* Gdb expects the trampoline is on the stack and the pc is offset from
a 64-byte boundary by 0, 4 or 5 instructions. Since the vdso trampoline
is not on the stack, we need a new variant with different offsets and
data to tell gdb where to find the signal context on the stack.
Here we put the offset to the context data at the start of the trampoline
region and offset the first trampoline by 2 instructions. Please do
not change the trampoline as the code in gdb depends on the following
instruction sequence exactly.
*/
.align 64
.word SIGFRAME_CONTEXT_REGS
/* The nop here is a hack. The dwarf2 unwind routines subtract 1 from
the return address to get an address in the middle of the presumed
call instruction. Since we don't have a call here, we artifically
extend the range covered by the unwind info by adding a nop before
the real start.
*/
nop
.globl __kernel_sigtramp_rt
.type __kernel_sigtramp_rt, @function
__kernel_sigtramp_rt:
.proc
.callinfo FRAME=ASM_SIGFRAME_SIZE,CALLS,SAVE_RP
.entry
.Lsigrt_start = . - 4
0: ldi 0, %r25 /* (in_syscall=0) */
ldi __NR_rt_sigreturn, %r20
ble 0x100(%sr2, %r0)
nop
1: ldi 1, %r25 /* (in_syscall=1) */
ldi __NR_rt_sigreturn, %r20
ble 0x100(%sr2, %r0)
nop
.Lsigrt_end:
.exit
.procend
.size __kernel_sigtramp_rt,.-__kernel_sigtramp_rt
.section .eh_frame,"a",@progbits
/* This is where the mcontext_t struct can be found on the stack. */
#define PTREGS SIGFRAME_CONTEXT_REGS /* 64-bit process offset is -720 */
/* Register REGNO can be found at offset OFS of the mcontext_t structure. */
.macro rsave regno,ofs
.byte 0x05 /* DW_CFA_offset_extended */
.uleb128 \regno; /* regno */
.uleb128 \ofs /* factored offset */
.endm
.Lcie:
.long .Lcie_end - .Lcie_start
.Lcie_start:
.long 0 /* CIE ID */
.byte 1 /* Version number */
.stringz "zRS" /* NUL-terminated augmentation string */
.uleb128 4 /* Code alignment factor */
.sleb128 8 /* Data alignment factor */
.byte 61 /* Return address register column, iaoq[0] */
.uleb128 1 /* Augmentation value length */
.byte 0x1b /* DW_EH_PE_pcrel | DW_EH_PE_sdata4. */
.byte 0x0f /* DW_CFA_def_cfa_expresion */
.uleb128 9f - 1f /* length */
1:
.byte 0x8e /* DW_OP_breg30 */
.sleb128 PTREGS
9:
.balign 8
.Lcie_end:
.long .Lfde0_end - .Lfde0_start
.Lfde0_start:
.long .Lfde0_start - .Lcie /* CIE pointer. */
.long .Lsigrt_start - . /* PC start, length */
.long .Lsigrt_end - .Lsigrt_start
.uleb128 0 /* Augmentation */
/* General registers */
rsave 1, 2
rsave 2, 3
rsave 3, 4
rsave 4, 5
rsave 5, 6
rsave 6, 7
rsave 7, 8
rsave 8, 9
rsave 9, 10
rsave 10, 11
rsave 11, 12
rsave 12, 13
rsave 13, 14
rsave 14, 15
rsave 15, 16
rsave 16, 17
rsave 17, 18
rsave 18, 19
rsave 19, 20
rsave 20, 21
rsave 21, 22
rsave 22, 23
rsave 23, 24
rsave 24, 25
rsave 25, 26
rsave 26, 27
rsave 27, 28
rsave 28, 29
rsave 29, 30
rsave 30, 31
rsave 31, 32
/* Floating-point registers */
rsave 32, 36
rsave 33, 37
rsave 34, 38
rsave 35, 39
rsave 36, 40
rsave 37, 41
rsave 38, 42
rsave 39, 43
rsave 40, 44
rsave 41, 45
rsave 42, 46
rsave 43, 47
rsave 44, 48
rsave 45, 49
rsave 46, 50
rsave 47, 51
rsave 48, 52
rsave 49, 53
rsave 50, 54
rsave 51, 55
rsave 52, 56
rsave 53, 57
rsave 54, 58
rsave 55, 59
rsave 56, 60
rsave 57, 61
rsave 58, 62
rsave 59, 63
/* SAR register */
rsave 60, 67
/* iaoq[0] return address register */
rsave 61, 65
.balign 8
.Lfde0_end:

109
arch/parisc/kernel/vdso64/vdso64.lds.S Normal file
View File

@ -0,0 +1,109 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* This is the infamous ld script for the 64 bits vdso library
*/
#include <asm/vdso.h>
/* Default link addresses for the vDSOs */
OUTPUT_FORMAT("elf64-hppa-linux")
OUTPUT_ARCH(hppa:hppa2.0w)
ENTRY(_start)
SECTIONS
{
. = VDSO_LBASE + SIZEOF_HEADERS;
.hash : { *(.hash) } :text
.gnu.hash : { *(.gnu.hash) }
.dynsym : { *(.dynsym) }
.dynstr : { *(.dynstr) }
.gnu.version : { *(.gnu.version) }
.gnu.version_d : { *(.gnu.version_d) }
.gnu.version_r : { *(.gnu.version_r) }
.note : { *(.note.*) } :text :note
. = ALIGN (16);
.text :
{
*(.text .stub .text.* .gnu.linkonce.t.*)
}
PROVIDE (__etext = .);
PROVIDE (_etext = .);
PROVIDE (etext = .);
/* Other stuff is appended to the text segment: */
.rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
.rodata1 : { *(.rodata1) }
.eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
.eh_frame : { KEEP (*(.eh_frame)) } :text
.gcc_except_table : { *(.gcc_except_table) }
.fixup : { *(.fixup) }
.dynamic : { *(.dynamic) } :text :dynamic
.plt : { *(.plt) }
.got : { *(.got) }
_end = .;
__end = .;
PROVIDE (end = .);
/* Stabs debugging sections are here too
*/
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
.debug 0 : { *(.debug) }
.line 0 : { *(.line) }
.debug_srcinfo 0 : { *(.debug_srcinfo) }
.debug_sfnames 0 : { *(.debug_sfnames) }
.debug_aranges 0 : { *(.debug_aranges) }
.debug_pubnames 0 : { *(.debug_pubnames) }
.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_line 0 : { *(.debug_line) }
.debug_frame 0 : { *(.debug_frame) }
.debug_str 0 : { *(.debug_str) }
.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
.debug_weaknames 0 : { *(.debug_weaknames) }
.debug_funcnames 0 : { *(.debug_funcnames) }
.debug_typenames 0 : { *(.debug_typenames) }
.debug_varnames 0 : { *(.debug_varnames) }
/DISCARD/ : { *(.note.GNU-stack) }
/DISCARD/ : { *(.data .data.* .gnu.linkonce.d.* .sdata*) }
/DISCARD/ : { *(.bss .sbss .dynbss .dynsbss) }
}
PHDRS
{
text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
note PT_NOTE FLAGS(4); /* PF_R */
dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
eh_frame_hdr PT_GNU_EH_FRAME;
}
/*
* This controls what symbols we export from the DSO.
*/
VERSION
{
VDSO_VERSION_STRING {
global:
__kernel_sigtramp_rt64;
__kernel_restart_syscall64;
local: *;
};
}

14
arch/parisc/kernel/vdso64/vdso64_wrapper.S Normal file
View File

@ -0,0 +1,14 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/linkage.h>
#include <asm/page.h>
__PAGE_ALIGNED_DATA
.globl vdso64_start, vdso64_end
.balign PAGE_SIZE
vdso64_start:
.incbin "arch/parisc/kernel/vdso64/vdso64.so"
.balign PAGE_SIZE
vdso64_end:
.previous

16
arch/parisc/lib/memcpy.c
View File

@ -13,8 +13,8 @@
#include <linux/compiler.h>
#include <linux/uaccess.h>
#define get_user_space() (uaccess_kernel() ? 0 : mfsp(3))
#define get_kernel_space() (0)
#define get_user_space() mfsp(SR_USER)
#define get_kernel_space() SR_KERNEL
/* Returns 0 for success, otherwise, returns number of bytes not transferred. */
extern unsigned long pa_memcpy(void *dst, const void *src,
@ -23,8 +23,8 @@ extern unsigned long pa_memcpy(void *dst, const void *src,
unsigned long raw_copy_to_user(void __user *dst, const void *src,
unsigned long len)
{
mtsp(get_kernel_space(), 1);
mtsp(get_user_space(), 2);
mtsp(get_kernel_space(), SR_TEMP1);
mtsp(get_user_space(), SR_TEMP2);
return pa_memcpy((void __force *)dst, src, len);
}
EXPORT_SYMBOL(raw_copy_to_user);
@ -32,16 +32,16 @@ EXPORT_SYMBOL(raw_copy_to_user);
unsigned long raw_copy_from_user(void *dst, const void __user *src,
unsigned long len)
{
mtsp(get_user_space(), 1);
mtsp(get_kernel_space(), 2);
mtsp(get_user_space(), SR_TEMP1);
mtsp(get_kernel_space(), SR_TEMP2);
return pa_memcpy(dst, (void __force *)src, len);
}
EXPORT_SYMBOL(raw_copy_from_user);
void * memcpy(void * dst,const void *src, size_t count)
{
mtsp(get_kernel_space(), 1);
mtsp(get_kernel_space(), 2);
mtsp(get_kernel_space(), SR_TEMP1);
mtsp(get_kernel_space(), SR_TEMP2);
pa_memcpy(dst, src, count);
return dst;
}

89
arch/parisc/mm/fault.c
View File

@ -425,3 +425,92 @@ out_of_memory:
}
pagefault_out_of_memory();
}
/* Handle non-access data TLB miss faults.
*
* For probe instructions, accesses to userspace are considered allowed
* if they lie in a valid VMA and the access type matches. We are not
* allowed to handle MM faults here so there may be situations where an
* actual access would fail even though a probe was successful.
*/
int
handle_nadtlb_fault(struct pt_regs *regs)
{
unsigned long insn = regs->iir;
int breg, treg, xreg, val = 0;
struct vm_area_struct *vma, *prev_vma;
struct task_struct *tsk;
struct mm_struct *mm;
unsigned long address;
unsigned long acc_type;
switch (insn & 0x380) {
case 0x280:
/* FDC instruction */
fallthrough;
case 0x380:
/* PDC and FIC instructions */
if (printk_ratelimit()) {
pr_warn("BUG: nullifying cache flush/purge instruction\n");
show_regs(regs);
}
if (insn & 0x20) {
/* Base modification */
breg = (insn >> 21) & 0x1f;
xreg = (insn >> 16) & 0x1f;
if (breg && xreg)
regs->gr[breg] += regs->gr[xreg];
}
regs->gr[0] |= PSW_N;
return 1;
case 0x180:
/* PROBE instruction */
treg = insn & 0x1f;
if (regs->isr) {
tsk = current;
mm = tsk->mm;
if (mm) {
/* Search for VMA */
address = regs->ior;
mmap_read_lock(mm);
vma = find_vma_prev(mm, address, &prev_vma);
mmap_read_unlock(mm);
/*
* Check if access to the VMA is okay.
* We don't allow for stack expansion.
*/
acc_type = (insn & 0x40) ? VM_WRITE : VM_READ;
if (vma
&& address >= vma->vm_start
&& (vma->vm_flags & acc_type) == acc_type)
val = 1;
}
}
if (treg)
regs->gr[treg] = val;
regs->gr[0] |= PSW_N;
return 1;
case 0x300:
/* LPA instruction */
if (insn & 0x20) {
/* Base modification */
breg = (insn >> 21) & 0x1f;
xreg = (insn >> 16) & 0x1f;
if (breg && xreg)
regs->gr[breg] += regs->gr[xreg];
}
treg = insn & 0x1f;
if (treg)
regs->gr[treg] = 0;
regs->gr[0] |= PSW_N;
return 1;
default:
break;
}
return 0;
}

45
drivers/video/fbdev/stifb.c
View File

@ -1041,6 +1041,47 @@ stifb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
SETUP_FB(fb);
}
#define ARTIST_VRAM_SIZE 0x000804
#define ARTIST_VRAM_SRC 0x000808
#define ARTIST_VRAM_SIZE_TRIGGER_WINFILL 0x000a04
#define ARTIST_VRAM_DEST_TRIGGER_BLOCKMOVE 0x000b00
#define ARTIST_SRC_BM_ACCESS 0x018008
#define ARTIST_FGCOLOR 0x018010
#define ARTIST_BGCOLOR 0x018014
#define ARTIST_BITMAP_OP 0x01801c
static void
stifb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
struct stifb_info *fb = container_of(info, struct stifb_info, info);
if (rect->rop != ROP_COPY)
return cfb_fillrect(info, rect);
SETUP_HW(fb);
if (fb->info.var.bits_per_pixel == 32) {
WRITE_WORD(0xBBA0A000, fb, REG_10);
NGLE_REALLY_SET_IMAGE_PLANEMASK(fb, 0xffffffff);
} else {
WRITE_WORD(fb->id == S9000_ID_HCRX ? 0x13a02000 : 0x13a01000, fb, REG_10);
NGLE_REALLY_SET_IMAGE_PLANEMASK(fb, 0xff);
}
WRITE_WORD(0x03000300, fb, ARTIST_BITMAP_OP);
WRITE_WORD(0x2ea01000, fb, ARTIST_SRC_BM_ACCESS);
NGLE_QUICK_SET_DST_BM_ACCESS(fb, 0x2ea01000);
NGLE_REALLY_SET_IMAGE_FG_COLOR(fb, rect->color);
WRITE_WORD(0, fb, ARTIST_BGCOLOR);
NGLE_SET_DSTXY(fb, (rect->dx << 16) | (rect->dy));
SET_LENXY_START_RECFILL(fb, (rect->width << 16) | (rect->height));
SETUP_FB(fb);
}
static void __init
stifb_init_display(struct stifb_info *fb)
{
@ -1105,7 +1146,7 @@ static const struct fb_ops stifb_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = stifb_setcolreg,
.fb_blank = stifb_blank,
.fb_fillrect = cfb_fillrect,
.fb_fillrect = stifb_fillrect,
.fb_copyarea = stifb_copyarea,
.fb_imageblit = cfb_imageblit,
};
@ -1297,7 +1338,7 @@ static int __init stifb_init_fb(struct sti_struct *sti, int bpp_pref)
goto out_err0;
}
info->screen_size = fix->smem_len;
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA;
info->flags = FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT;
info->pseudo_palette = &fb->pseudo_palette;
/* This has to be done !!! */