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alpha: add a helper for emitting exception table entries 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
zero-colors
Al Viro 2017-03-07 04:08:46 -05:00
parent c9df6025a6
commit ca282f6973
4 changed files with 68 additions and 186 deletions
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16
arch/alpha/include/asm/futex.h
View File

@ -19,12 +19,8 @@
"3: .subsection 2\n" \
"4: br 1b\n" \
" .previous\n" \
" .section __ex_table,\"a\"\n" \
" .long 1b-.\n" \
" lda $31,3b-1b(%1)\n" \
" .long 2b-.\n" \
" lda $31,3b-2b(%1)\n" \
" .previous\n" \
EXC(1b,3b,%1,$31) \
EXC(2b,3b,%1,$31) \
: "=&r" (oldval), "=&r"(ret) \
: "r" (uaddr), "r"(oparg) \
: "memory")
@ -101,12 +97,8 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
"3: .subsection 2\n"
"4: br 1b\n"
" .previous\n"
" .section __ex_table,\"a\"\n"
" .long 1b-.\n"
" lda $31,3b-1b(%0)\n"
" .long 2b-.\n"
" lda $31,3b-2b(%0)\n"
" .previous\n"
EXC(1b,3b,%0,$31)
EXC(2b,3b,%0,$31)
: "+r"(ret), "=&r"(prev), "=&r"(cmp)
: "r"(uaddr), "r"((long)(int)oldval), "r"(newval)
: "memory");

80
arch/alpha/include/asm/uaccess.h
View File

@ -74,6 +74,11 @@
* more extensive comments with fixup_inline_exception below for
* more information.
*/
#define EXC(label,cont,res,err) \
".section __ex_table,\"a\"\n" \
" .long "#label"-.\n" \
" lda "#res","#cont"-"#label"("#err")\n" \
".previous\n"
extern void __get_user_unknown(void);
@ -118,20 +123,14 @@ struct __large_struct { unsigned long buf[100]; };
#define __get_user_64(addr) \
__asm__("1: ldq %0,%2\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda %0, 2b-1b(%1)\n" \
".previous" \
EXC(1b,2b,%0,%1) \
: "=r"(__gu_val), "=r"(__gu_err) \
: "m"(__m(addr)), "1"(__gu_err))
#define __get_user_32(addr) \
__asm__("1: ldl %0,%2\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda %0, 2b-1b(%1)\n" \
".previous" \
EXC(1b,2b,%0,%1) \
: "=r"(__gu_val), "=r"(__gu_err) \
: "m"(__m(addr)), "1"(__gu_err))
@ -141,20 +140,14 @@ struct __large_struct { unsigned long buf[100]; };
#define __get_user_16(addr) \
__asm__("1: ldwu %0,%2\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda %0, 2b-1b(%1)\n" \
".previous" \
EXC(1b,2b,%0,%1) \
: "=r"(__gu_val), "=r"(__gu_err) \
: "m"(__m(addr)), "1"(__gu_err))
#define __get_user_8(addr) \
__asm__("1: ldbu %0,%2\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda %0, 2b-1b(%1)\n" \
".previous" \
EXC(1b,2b,%0,%1) \
: "=r"(__gu_val), "=r"(__gu_err) \
: "m"(__m(addr)), "1"(__gu_err))
#else
@ -170,12 +163,8 @@ struct __large_struct { unsigned long buf[100]; };
" extwh %1,%3,%1\n" \
" or %0,%1,%0\n" \
"3:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda %0, 3b-1b(%2)\n" \
" .long 2b - .\n" \
" lda %0, 3b-2b(%2)\n" \
".previous" \
EXC(1b,3b,%0,%2) \
EXC(2b,3b,%0,%2) \
: "=&r"(__gu_val), "=&r"(__gu_tmp), "=r"(__gu_err) \
: "r"(addr), "2"(__gu_err)); \
}
@ -184,10 +173,7 @@ struct __large_struct { unsigned long buf[100]; };
__asm__("1: ldq_u %0,0(%2)\n" \
" extbl %0,%2,%0\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda %0, 2b-1b(%1)\n" \
".previous" \
EXC(1b,2b,%0,%1) \
: "=&r"(__gu_val), "=r"(__gu_err) \
: "r"(addr), "1"(__gu_err))
#endif
@ -233,20 +219,14 @@ extern void __put_user_unknown(void);
#define __put_user_64(x, addr) \
__asm__ __volatile__("1: stq %r2,%1\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda $31,2b-1b(%0)\n" \
".previous" \
EXC(1b,2b,$31,%0) \
: "=r"(__pu_err) \
: "m" (__m(addr)), "rJ" (x), "0"(__pu_err))
#define __put_user_32(x, addr) \
__asm__ __volatile__("1: stl %r2,%1\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda $31,2b-1b(%0)\n" \
".previous" \
EXC(1b,2b,$31,%0) \
: "=r"(__pu_err) \
: "m"(__m(addr)), "rJ"(x), "0"(__pu_err))
@ -256,20 +236,14 @@ __asm__ __volatile__("1: stl %r2,%1\n" \
#define __put_user_16(x, addr) \
__asm__ __volatile__("1: stw %r2,%1\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda $31,2b-1b(%0)\n" \
".previous" \
EXC(1b,2b,$31,%0) \
: "=r"(__pu_err) \
: "m"(__m(addr)), "rJ"(x), "0"(__pu_err))
#define __put_user_8(x, addr) \
__asm__ __volatile__("1: stb %r2,%1\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda $31,2b-1b(%0)\n" \
".previous" \
EXC(1b,2b,$31,%0) \
: "=r"(__pu_err) \
: "m"(__m(addr)), "rJ"(x), "0"(__pu_err))
#else
@ -291,16 +265,10 @@ __asm__ __volatile__("1: stb %r2,%1\n" \
"3: stq_u %2,1(%5)\n" \
"4: stq_u %1,0(%5)\n" \
"5:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda $31, 5b-1b(%0)\n" \
" .long 2b - .\n" \
" lda $31, 5b-2b(%0)\n" \
" .long 3b - .\n" \
" lda $31, 5b-3b(%0)\n" \
" .long 4b - .\n" \
" lda $31, 5b-4b(%0)\n" \
".previous" \
EXC(1b,5b,$31,%0) \
EXC(2b,5b,$31,%0) \
EXC(3b,5b,$31,%0) \
EXC(4b,5b,$31,%0) \
: "=r"(__pu_err), "=&r"(__pu_tmp1), \
"=&r"(__pu_tmp2), "=&r"(__pu_tmp3), \
"=&r"(__pu_tmp4) \
@ -317,12 +285,8 @@ __asm__ __volatile__("1: stb %r2,%1\n" \
" or %1,%2,%1\n" \
"2: stq_u %1,0(%4)\n" \
"3:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda $31, 3b-1b(%0)\n" \
" .long 2b - .\n" \
" lda $31, 3b-2b(%0)\n" \
".previous" \
EXC(1b,3b,$31,%0) \
EXC(2b,3b,$31,%0) \
: "=r"(__pu_err), \
"=&r"(__pu_tmp1), "=&r"(__pu_tmp2) \
: "r"((unsigned long)(x)), "r"(addr), "0"(__pu_err)); \

148
arch/alpha/kernel/traps.c
View File

@ -482,12 +482,8 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
" extwl %1,%3,%1\n"
" extwh %2,%3,%2\n"
"3:\n"
".section __ex_table,\"a\"\n"
" .long 1b - .\n"
" lda %1,3b-1b(%0)\n"
" .long 2b - .\n"
" lda %2,3b-2b(%0)\n"
".previous"
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@ -502,12 +498,8 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
" extll %1,%3,%1\n"
" extlh %2,%3,%2\n"
"3:\n"
".section __ex_table,\"a\"\n"
" .long 1b - .\n"
" lda %1,3b-1b(%0)\n"
" .long 2b - .\n"
" lda %2,3b-2b(%0)\n"
".previous"
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@ -522,12 +514,8 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
" extql %1,%3,%1\n"
" extqh %2,%3,%2\n"
"3:\n"
".section __ex_table,\"a\"\n"
" .long 1b - .\n"
" lda %1,3b-1b(%0)\n"
" .long 2b - .\n"
" lda %2,3b-2b(%0)\n"
".previous"
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@ -551,16 +539,10 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
"3: stq_u %2,1(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
".section __ex_table,\"a\"\n"
" .long 1b - .\n"
" lda %2,5b-1b(%0)\n"
" .long 2b - .\n"
" lda %1,5b-2b(%0)\n"
" .long 3b - .\n"
" lda $31,5b-3b(%0)\n"
" .long 4b - .\n"
" lda $31,5b-4b(%0)\n"
".previous"
EXC(1b,5b,%2,%0)
EXC(2b,5b,%1,%0)
EXC(3b,5b,$31,%0)
EXC(4b,5b,$31,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(una_reg(reg)), "0"(0));
@ -581,16 +563,10 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
"3: stq_u %2,3(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
".section __ex_table,\"a\"\n"
" .long 1b - .\n"
" lda %2,5b-1b(%0)\n"
" .long 2b - .\n"
" lda %1,5b-2b(%0)\n"
" .long 3b - .\n"
" lda $31,5b-3b(%0)\n"
" .long 4b - .\n"
" lda $31,5b-4b(%0)\n"
".previous"
EXC(1b,5b,%2,%0)
EXC(2b,5b,%1,%0)
EXC(3b,5b,$31,%0)
EXC(4b,5b,$31,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(una_reg(reg)), "0"(0));
@ -611,16 +587,10 @@ do_entUna(void * va, unsigned long opcode, unsigned long reg,
"3: stq_u %2,7(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
".section __ex_table,\"a\"\n\t"
" .long 1b - .\n"
" lda %2,5b-1b(%0)\n"
" .long 2b - .\n"
" lda %1,5b-2b(%0)\n"
" .long 3b - .\n"
" lda $31,5b-3b(%0)\n"
" .long 4b - .\n"
" lda $31,5b-4b(%0)\n"
".previous"
EXC(1b,5b,%2,%0)
EXC(2b,5b,%1,%0)
EXC(3b,5b,$31,%0)
EXC(4b,5b,$31,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(una_reg(reg)), "0"(0));
@ -835,12 +805,8 @@ do_entUnaUser(void __user * va, unsigned long opcode,
" extwl %1,%3,%1\n"
" extwh %2,%3,%2\n"
"3:\n"
".section __ex_table,\"a\"\n"
" .long 1b - .\n"
" lda %1,3b-1b(%0)\n"
" .long 2b - .\n"
" lda %2,3b-2b(%0)\n"
".previous"
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@ -855,12 +821,8 @@ do_entUnaUser(void __user * va, unsigned long opcode,
" extll %1,%3,%1\n"
" extlh %2,%3,%2\n"
"3:\n"
".section __ex_table,\"a\"\n"
" .long 1b - .\n"
" lda %1,3b-1b(%0)\n"
" .long 2b - .\n"
" lda %2,3b-2b(%0)\n"
".previous"
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@ -875,12 +837,8 @@ do_entUnaUser(void __user * va, unsigned long opcode,
" extql %1,%3,%1\n"
" extqh %2,%3,%2\n"
"3:\n"
".section __ex_table,\"a\"\n"
" .long 1b - .\n"
" lda %1,3b-1b(%0)\n"
" .long 2b - .\n"
" lda %2,3b-2b(%0)\n"
".previous"
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@ -895,12 +853,8 @@ do_entUnaUser(void __user * va, unsigned long opcode,
" extll %1,%3,%1\n"
" extlh %2,%3,%2\n"
"3:\n"
".section __ex_table,\"a\"\n"
" .long 1b - .\n"
" lda %1,3b-1b(%0)\n"
" .long 2b - .\n"
" lda %2,3b-2b(%0)\n"
".previous"
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@ -915,12 +869,8 @@ do_entUnaUser(void __user * va, unsigned long opcode,
" extql %1,%3,%1\n"
" extqh %2,%3,%2\n"
"3:\n"
".section __ex_table,\"a\"\n"
" .long 1b - .\n"
" lda %1,3b-1b(%0)\n"
" .long 2b - .\n"
" lda %2,3b-2b(%0)\n"
".previous"
EXC(1b,3b,%1,%0)
EXC(2b,3b,%2,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2)
: "r"(va), "0"(0));
if (error)
@ -944,16 +894,10 @@ do_entUnaUser(void __user * va, unsigned long opcode,
"3: stq_u %2,1(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
".section __ex_table,\"a\"\n"
" .long 1b - .\n"
" lda %2,5b-1b(%0)\n"
" .long 2b - .\n"
" lda %1,5b-2b(%0)\n"
" .long 3b - .\n"
" lda $31,5b-3b(%0)\n"
" .long 4b - .\n"
" lda $31,5b-4b(%0)\n"
".previous"
EXC(1b,5b,%2,%0)
EXC(2b,5b,%1,%0)
EXC(3b,5b,$31,%0)
EXC(4b,5b,$31,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(*reg_addr), "0"(0));
@ -978,16 +922,10 @@ do_entUnaUser(void __user * va, unsigned long opcode,
"3: stq_u %2,3(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
".section __ex_table,\"a\"\n"
" .long 1b - .\n"
" lda %2,5b-1b(%0)\n"
" .long 2b - .\n"
" lda %1,5b-2b(%0)\n"
" .long 3b - .\n"
" lda $31,5b-3b(%0)\n"
" .long 4b - .\n"
" lda $31,5b-4b(%0)\n"
".previous"
EXC(1b,5b,%2,%0)
EXC(2b,5b,%1,%0)
EXC(3b,5b,$31,%0)
EXC(4b,5b,$31,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(*reg_addr), "0"(0));
@ -1012,16 +950,10 @@ do_entUnaUser(void __user * va, unsigned long opcode,
"3: stq_u %2,7(%5)\n"
"4: stq_u %1,0(%5)\n"
"5:\n"
".section __ex_table,\"a\"\n\t"
" .long 1b - .\n"
" lda %2,5b-1b(%0)\n"
" .long 2b - .\n"
" lda %1,5b-2b(%0)\n"
" .long 3b - .\n"
" lda $31,5b-3b(%0)\n"
" .long 4b - .\n"
" lda $31,5b-4b(%0)\n"
".previous"
EXC(1b,5b,%2,%0)
EXC(2b,5b,%1,%0)
EXC(3b,5b,$31,%0)
EXC(4b,5b,$31,%0)
: "=r"(error), "=&r"(tmp1), "=&r"(tmp2),
"=&r"(tmp3), "=&r"(tmp4)
: "r"(va), "r"(*reg_addr), "0"(0));

10
arch/alpha/lib/csum_partial_copy.c
View File

@ -45,10 +45,7 @@ __asm__ __volatile__("insqh %1,%2,%0":"=r" (z):"r" (x),"r" (y))
__asm__ __volatile__( \
"1: ldq_u %0,%2\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - .\n" \
" lda %0,2b-1b(%1)\n" \
".previous" \
EXC(1b,2b,%0,%1) \
: "=r"(x), "=r"(__guu_err) \
: "m"(__m(ptr)), "1"(0)); \
__guu_err; \
@ -60,10 +57,7 @@ __asm__ __volatile__("insqh %1,%2,%0":"=r" (z):"r" (x),"r" (y))
__asm__ __volatile__( \
"1: stq_u %2,%1\n" \
"2:\n" \
".section __ex_table,\"a\"\n" \
" .long 1b - ." \
" lda $31,2b-1b(%0)\n" \
".previous" \
EXC(1b,2b,$31,%0) \
: "=r"(__puu_err) \
: "m"(__m(addr)), "rJ"(x), "0"(0)); \
__puu_err; \