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Commit 747e0767 authored by Richard Henderson's avatar Richard Henderson
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Merge are.twiddle.net:/home/rth/BK/linus-2.5 

into are.twiddle.net:/home/rth/BK/axp-2.5
parents 30d66ad7 c6148cc5
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Showing with 58 additions and 124 deletions
arch/alpha/kernel/traps.c
View file @ 747e0767
......@@ -638,7 +638,7 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
got_exception:
/* Ok, we caught the exception, but we don't want it. Is there
someone to pass it along to? */
if ((fixup = search_exception_table(pc, regs.gp)) != 0) {
if ((fixup = search_exception_table(pc)) != 0) {
unsigned long newpc;
newpc = fixup_exception(una_reg, fixup, pc);
......
arch/alpha/lib/clear_user.S
View file @ 747e0767
......@@ -29,7 +29,7 @@
#define EX(x,y...) \
99: x,##y; \
.section __ex_table,"a"; \
.gprel32 99b; \
.long 99b - .; \
lda $31, $exception-99b($31); \
.previous
......@@ -80,7 +80,6 @@ $tail:
ret $31, ($28), 1 # .. e1 :
__do_clear_user:
ldgp $29,0($27) # we do exceptions -- we need the gp.
and $6, 7, $4 # e0 : find dest misalignment
beq $0, $zerolength # .. e1 :
addq $0, $4, $1 # e0 : bias counter
......
arch/alpha/lib/copy_user.S
View file @ 747e0767
......@@ -30,29 +30,28 @@
#define EXI(x,y...) \
99: x,##y; \
.section __ex_table,"a"; \
.gprel32 99b; \
.long 99b - .; \
lda $31, $exitin-99b($31); \
.previous
#define EXO(x,y...) \
99: x,##y; \
.section __ex_table,"a"; \
.gprel32 99b; \
.long 99b - .; \
lda $31, $exitout-99b($31); \
.previous
.set noat
.align 3
.align 4
.globl __copy_user
.ent __copy_user
__copy_user:
ldgp $29,0($27) # we do exceptions -- we need the gp.
.prologue 1
.prologue 0
and $6,7,$3
beq $0,$35
beq $3,$36
subq $3,8,$3
.align 5
.align 4
$37:
EXI( ldq_u $1,0($7) )
EXO( ldq_u $2,0($6) )
......@@ -73,7 +72,7 @@ $36:
beq $1,$43
beq $4,$48
EXI( ldq_u $3,0($7) )
.align 5
.align 4
$50:
EXI( ldq_u $2,8($7) )
subq $4,8,$4
......@@ -88,7 +87,7 @@ $50:
bne $4,$50
$48:
beq $0,$41
.align 5
.align 4
$57:
EXI( ldq_u $1,0($7) )
EXO( ldq_u $2,0($6) )
......@@ -105,7 +104,7 @@ $57:
.align 4
$43:
beq $4,$65
.align 5
.align 4
$66:
EXI( ldq $1,0($7) )
subq $4,8,$4
......
arch/alpha/lib/ev6-clear_user.S
View file @ 747e0767
......@@ -47,7 +47,7 @@
#define EX(x,y...) \
99: x,##y; \
.section __ex_table,"a"; \
.gprel32 99b; \
.long 99b - .; \
lda $31, $exception-99b($31); \
.previous
......@@ -62,9 +62,6 @@
# Pipeline info : Slotting & Comments
__do_clear_user:
ldgp $29,0($27) # we do exceptions -- we need the gp.
# Macro instruction becomes ldah/lda
# .. .. E E :
and $6, 7, $4 # .. E .. .. : find dest head misalignment
beq $0, $zerolength # U .. .. .. : U L U L
......
arch/alpha/lib/ev6-copy_user.S
View file @ 747e0767
......@@ -41,14 +41,14 @@
#define EXI(x,y...) \
99: x,##y; \
.section __ex_table,"a"; \
.gprel32 99b; \
.long 99b - .; \
lda $31, $exitin-99b($31); \
.previous
#define EXO(x,y...) \
99: x,##y; \
.section __ex_table,"a"; \
.gprel32 99b; \
.long 99b - .; \
lda $31, $exitout-99b($31); \
.previous
......@@ -58,10 +58,7 @@
.ent __copy_user
# Pipeline info: Slotting & Comments
__copy_user:
ldgp $29,0($27) # we do exceptions -- we need the gp.
# Macro instruction becomes ldah/lda
# .. .. E E
.prologue 1
.prologue 0
subq $0, 32, $1 # .. E .. .. : Is this going to be a small copy?
beq $0, $zerolength # U .. .. .. : U L U L
......
arch/alpha/lib/ev6-strncpy_from_user.S
View file @ 747e0767
......@@ -34,7 +34,7 @@
#define EX(x,y...) \
99: x,##y; \
.section __ex_table,"a"; \
.gprel32 99b; \
.long 99b - .; \
lda $31, $exception-99b($0); \
.previous
......@@ -46,11 +46,10 @@
.globl __strncpy_from_user
.ent __strncpy_from_user
.frame $30, 0, $26
.prologue 1
.prologue 0
.align 4
__strncpy_from_user:
ldgp $29, 0($27) # E E : becomes 2 instructions (for exceptions)
and a0, 7, t3 # E : find dest misalignment
beq a2, $zerolength # U :
......
arch/alpha/lib/ev67-strlen_user.S
View file @ 747e0767
......@@ -30,7 +30,7 @@
#define EX(x,y...) \
99: x,##y; \
.section __ex_table,"a"; \
.gprel32 99b; \
.long 99b - .; \
lda v0, $exception-99b(zero); \
.previous
......@@ -56,9 +56,7 @@ __strlen_user:
.align 4
__strnlen_user:
ldgp $29,0($27) # E E : we do exceptions -- we need the gp.
/* Decomposes into lda/ldah */
.prologue 1
.prologue 0
EX( ldq_u t0, 0(a0) ) # L : load first quadword (a0 may be misaligned)
lda t1, -1(zero) # E :
......
arch/alpha/lib/strlen_user.S
View file @ 747e0767
......@@ -19,7 +19,7 @@
#define EX(x,y...) \
99: x,##y; \
.section __ex_table,"a"; \
.gprel32 99b; \
.long 99b - .; \
lda v0, $exception-99b(zero); \
.previous
......@@ -42,8 +42,7 @@ __strlen_user:
.align 3
__strnlen_user:
ldgp $29,0($27) # we do exceptions -- we need the gp.
.prologue 1
.prologue 0
EX( ldq_u t0, 0(a0) ) # load first quadword (a0 may be misaligned)
lda t1, -1(zero)
......
arch/alpha/lib/strncpy_from_user.S
View file @ 747e0767
......@@ -19,7 +19,7 @@
#define EX(x,y...) \
99: x,##y; \
.section __ex_table,"a"; \
.gprel32 99b; \
.long 99b - .; \
lda $31, $exception-99b($0); \
.previous
......@@ -31,7 +31,7 @@
.globl __strncpy_from_user
.ent __strncpy_from_user
.frame $30, 0, $26
.prologue 1
.prologue 0
.align 3
$aligned:
......@@ -100,8 +100,6 @@ $a_eoc:
/*** The Function Entry Point ***/
.align 3
__strncpy_from_user:
ldgp $29, 0($27) # we do exceptions -- we need the gp.
mov a0, v0 # save the string start
beq a2, $zerolength
......
arch/alpha/mm/extable.c
View file @ 747e0767
......@@ -12,21 +12,17 @@ extern const struct exception_table_entry __stop___ex_table[];
static inline unsigned
search_one_table(const struct exception_table_entry *first,
const struct exception_table_entry *last,
signed long value)
unsigned long value)
{
/* Abort early if the search value is out of range. */
if (value != (signed int)value)
return 0;
while (first <= last) {
const struct exception_table_entry *mid;
long diff;
unsigned long mid_value;
mid = (last - first) / 2 + first;
diff = mid->insn - value;
if (diff == 0)
mid_value = (unsigned long)&mid->insn + mid->insn;
if (mid_value == value)
return mid->fixup.unit;
else if (diff < 0)
else if (mid_value < value)
first = mid+1;
else
last = mid-1;
......@@ -34,48 +30,13 @@ search_one_table(const struct exception_table_entry *first,
return 0;
}
register unsigned long gp __asm__("$29");
static unsigned
search_exception_table_without_gp(unsigned long addr)
{
unsigned ret;
#ifndef CONFIG_MODULES
/* There is only the kernel to search. */
ret = search_one_table(__start___ex_table, __stop___ex_table - 1,
addr - gp);
#else
extern spinlock_t modlist_lock;
unsigned long flags;
/* The kernel is the last "module" -- no need to treat it special. */
struct module *mp;
ret = 0;
spin_lock_irqsave(&modlist_lock, flags);
for (mp = module_list; mp ; mp = mp->next) {
if (!mp->ex_table_start || !(mp->flags&(MOD_RUNNING|MOD_INITIALIZING)))
continue;
ret = search_one_table(mp->ex_table_start,
mp->ex_table_end - 1, addr - mp->gp);
if (ret)
break;
}
spin_unlock_irqrestore(&modlist_lock, flags);
#endif
return ret;
}
unsigned
search_exception_table(unsigned long addr, unsigned long exc_gp)
search_exception_table(unsigned long addr)
{
unsigned ret;
#ifndef CONFIG_MODULES
ret = search_one_table(__start___ex_table, __stop___ex_table - 1,
addr - exc_gp);
if (ret) return ret;
ret = search_one_table(__start___ex_table, __stop___ex_table-1, addr);
#else
extern spinlock_t modlist_lock;
unsigned long flags;
......@@ -88,25 +49,12 @@ search_exception_table(unsigned long addr, unsigned long exc_gp)
if (!mp->ex_table_start || !(mp->flags&(MOD_RUNNING|MOD_INITIALIZING)))
continue;
ret = search_one_table(mp->ex_table_start,
mp->ex_table_end - 1, addr - exc_gp);
mp->ex_table_end - 1, addr);
if (ret)
break;
}
spin_unlock_irqrestore(&modlist_lock, flags);
if (ret) return ret;
#endif
/*
* The search failed with the exception gp. To be safe, try the
* old method before giving up.
*/
ret = search_exception_table_without_gp(addr);
if (ret) {
printk(KERN_ALERT "%s: [%lx] EX_TABLE search fail with"
"exc frame GP, success with raw GP\n",
current->comm, addr);
return ret;
}
return 0;
return ret;
}
arch/alpha/mm/fault.c
View file @ 747e0767
......@@ -176,7 +176,7 @@ do_page_fault(unsigned long address, unsigned long mmcsr,
no_context:
/* Are we prepared to handle this fault as an exception? */
if ((fixup = search_exception_table(regs->pc, regs->gp)) != 0) {
if ((fixup = search_exception_table(regs->pc)) != 0) {
unsigned long newpc;
newpc = fixup_exception(dpf_reg, fixup, regs->pc);
regs->pc = newpc;
......
include/asm-alpha/dma.h
View file @ 747e0767
......@@ -112,9 +112,9 @@
# elif defined(CONFIG_ALPHA_RUFFIAN)
# define MAX_ISA_DMA_ADDRESS ALPHA_RUFFIAN_MAX_ISA_DMA_ADDRESS
# elif defined(CONFIG_ALPHA_SABLE)
# define MAX_ISA_DMA_ADDRESS ALPHA_SABLE_MAX_DMA_ISA_ADDRESS
# define MAX_ISA_DMA_ADDRESS ALPHA_SABLE_MAX_ISA_DMA_ADDRESS
# elif defined(CONFIG_ALPHA_ALCOR)
# define MAX_ISA_DMA_ADDRESS ALPHA_ALCOR_MAX_DMA_ISA_ADDRESS
# define MAX_ISA_DMA_ADDRESS ALPHA_ALCOR_MAX_ISA_DMA_ADDRESS
# else
# define MAX_ISA_DMA_ADDRESS ALPHA_MAX_ISA_DMA_ADDRESS
# endif
......
include/asm-alpha/uaccess.h
View file @ 747e0767
......@@ -126,7 +126,7 @@ struct __large_struct { unsigned long buf[100]; };
__asm__("1: ldq %0,%2\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .gprel32 1b\n" \
" .long 1b - .\n" \
" lda %0, 2b-1b(%1)\n" \
".previous" \
: "=r"(__gu_val), "=r"(__gu_err) \
......@@ -136,7 +136,7 @@ struct __large_struct { unsigned long buf[100]; };
__asm__("1: ldl %0,%2\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .gprel32 1b\n" \
" .long 1b - .\n" \
" lda %0, 2b-1b(%1)\n" \
".previous" \
: "=r"(__gu_val), "=r"(__gu_err) \
......@@ -149,7 +149,7 @@ struct __large_struct { unsigned long buf[100]; };
__asm__("1: ldwu %0,%2\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .gprel32 1b\n" \
" .long 1b - .\n" \
" lda %0, 2b-1b(%1)\n" \
".previous" \
: "=r"(__gu_val), "=r"(__gu_err) \
......@@ -159,7 +159,7 @@ struct __large_struct { unsigned long buf[100]; };
__asm__("1: ldbu %0,%2\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .gprel32 1b\n" \
" .long 1b - .\n" \
" lda %0, 2b-1b(%1)\n" \
".previous" \
: "=r"(__gu_val), "=r"(__gu_err) \
......@@ -178,10 +178,10 @@ struct __large_struct { unsigned long buf[100]; };
" or %0,%1,%0\n" \
"3:\n" \
".section __ex_table,\"a\"\n" \
" .gprel32 1b\n" \
" .long 1b - .\n" \
" lda %0, 3b-1b(%2)\n" \
" .gprel32 2b\n" \
" lda %0, 2b-1b(%2)\n" \
" .long 2b - .\n" \
" lda %0, 3b-2b(%2)\n" \
".previous" \
: "=&r"(__gu_val), "=&r"(__gu_tmp), "=r"(__gu_err) \
: "r"(addr), "2"(__gu_err)); \
......@@ -192,7 +192,7 @@ struct __large_struct { unsigned long buf[100]; };
" extbl %0,%2,%0\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .gprel32 1b\n" \
" .long 1b - .\n" \
" lda %0, 2b-1b(%1)\n" \
".previous" \
: "=&r"(__gu_val), "=r"(__gu_err) \
......@@ -240,7 +240,7 @@ extern void __put_user_unknown(void);
__asm__ __volatile__("1: stq %r2,%1\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .gprel32 1b\n" \
" .long 1b - .\n" \
" lda $31,2b-1b(%0)\n" \
".previous" \
: "=r"(__pu_err) \
......@@ -250,7 +250,7 @@ __asm__ __volatile__("1: stq %r2,%1\n" \
__asm__ __volatile__("1: stl %r2,%1\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .gprel32 1b\n" \
" .long 1b - .\n" \
" lda $31,2b-1b(%0)\n" \
".previous" \
: "=r"(__pu_err) \
......@@ -263,7 +263,7 @@ __asm__ __volatile__("1: stl %r2,%1\n" \
__asm__ __volatile__("1: stw %r2,%1\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .gprel32 1b\n" \
" .long 1b - .\n" \
" lda $31,2b-1b(%0)\n" \
".previous" \
: "=r"(__pu_err) \
......@@ -273,7 +273,7 @@ __asm__ __volatile__("1: stw %r2,%1\n" \
__asm__ __volatile__("1: stb %r2,%1\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .gprel32 1b\n" \
" .long 1b - .\n" \
" lda $31,2b-1b(%0)\n" \
".previous" \
: "=r"(__pu_err) \
......@@ -298,13 +298,13 @@ __asm__ __volatile__("1: stb %r2,%1\n" \
"4: stq_u %1,0(%5)\n" \
"5:\n" \
".section __ex_table,\"a\"\n" \
" .gprel32 1b\n" \
" .long 1b - .\n" \
" lda $31, 5b-1b(%0)\n" \
" .gprel32 2b\n" \
" .long 2b - .\n" \
" lda $31, 5b-2b(%0)\n" \
" .gprel32 3b\n" \
" .long 3b - .\n" \
" lda $31, 5b-3b(%0)\n" \
" .gprel32 4b\n" \
" .long 4b - .\n" \
" lda $31, 5b-4b(%0)\n" \
".previous" \
: "=r"(__pu_err), "=&r"(__pu_tmp1), \
......@@ -324,9 +324,9 @@ __asm__ __volatile__("1: stb %r2,%1\n" \
"2: stq_u %1,0(%4)\n" \
"3:\n" \
".section __ex_table,\"a\"\n" \
" .gprel32 1b\n" \
" .long 1b - .\n" \
" lda $31, 3b-1b(%0)\n" \
" .gprel32 2b\n" \
" .long 2b - .\n" \
" lda $31, 3b-2b(%0)\n" \
".previous" \
: "=r"(__pu_err), \
......@@ -356,7 +356,7 @@ __copy_tofrom_user_nocheck(void *to, const void *from, long len)
register long __cu_len __asm__("$0") = len;
__asm__ __volatile__(
"jsr $28,(%3),__copy_user\n\tldgp $29,0($28)"
"jsr $28,(%3),__copy_user"
: "=r" (__cu_len), "=r" (__cu_from), "=r" (__cu_to), "=r"(pv)
: "0" (__cu_len), "1" (__cu_from), "2" (__cu_to), "3"(pv)
: "$1","$2","$3","$4","$5","$28","memory");
......@@ -373,7 +373,7 @@ __copy_tofrom_user(void *to, const void *from, long len, const void *validate)
register const void * __cu_from __asm__("$7") = from;
register long __cu_len __asm__("$0") = len;
__asm__ __volatile__(
"jsr $28,(%3),__copy_user\n\tldgp $29,0($28)"
"jsr $28,(%3),__copy_user"
: "=r"(__cu_len), "=r"(__cu_from), "=r"(__cu_to),
"=r" (pv)
: "0" (__cu_len), "1" (__cu_from), "2" (__cu_to),
......@@ -413,7 +413,7 @@ __clear_user(void *to, long len)
register void * __cl_to __asm__("$6") = to;
register long __cl_len __asm__("$0") = len;
__asm__ __volatile__(
"jsr $28,(%2),__do_clear_user\n\tldgp $29,0($28)"
"jsr $28,(%2),__do_clear_user"
: "=r"(__cl_len), "=r"(__cl_to), "=r"(pv)
: "0"(__cl_len), "1"(__cl_to), "2"(pv)
: "$1","$2","$3","$4","$5","$28","memory");
......@@ -428,7 +428,7 @@ clear_user(void *to, long len)
register void * __cl_to __asm__("$6") = to;
register long __cl_len __asm__("$0") = len;
__asm__ __volatile__(
"jsr $28,(%2),__do_clear_user\n\tldgp $29,0($28)"
"jsr $28,(%2),__do_clear_user"
: "=r"(__cl_len), "=r"(__cl_to), "=r"(pv)
: "0"(__cl_len), "1"(__cl_to), "2"(pv)
: "$1","$2","$3","$4","$5","$28","memory");
......@@ -471,7 +471,7 @@ extern inline long strnlen_user(const char *str, long n)
/*
* About the exception table:
*
* - insn is a 32-bit offset off of the kernel's or module's gp.
* - insn is a 32-bit pc-relative offset from the faulting insn.
* - nextinsn is a 16-bit offset off of the faulting instruction
* (not off of the *next* instruction as branches are).
* - errreg is the register in which to place -EFAULT.
......@@ -502,7 +502,7 @@ struct exception_table_entry
};
/* Returns 0 if exception not found and fixup.unit otherwise. */
extern unsigned search_exception_table(unsigned long, unsigned long);
extern unsigned search_exception_table(unsigned long);
/* Returns the new pc */
#define fixup_exception(map_reg, fixup_unit, pc) \
......
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