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Diffstat (limited to 'arch/alpha/kernel/traps.c')
-rw-r--r--arch/alpha/kernel/traps.c152
1 files changed, 42 insertions, 110 deletions
diff --git a/arch/alpha/kernel/traps.c b/arch/alpha/kernel/traps.c
index b137390e87e7..65bb102d985b 100644
--- a/arch/alpha/kernel/traps.c
+++ b/arch/alpha/kernel/traps.c
@@ -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));
@@ -802,7 +772,7 @@ do_entUnaUser(void __user * va, unsigned long opcode,
/* Don't bother reading ds in the access check since we already
know that this came from the user. Also rely on the fact that
the page at TASK_SIZE is unmapped and so can't be touched anyway. */
- if (!__access_ok((unsigned long)va, 0, USER_DS))
+ if ((unsigned long)va >= TASK_SIZE)
goto give_sigsegv;
++unaligned[1].count;
@@ -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));
@@ -1047,7 +979,7 @@ give_sigsegv:
/* We need to replicate some of the logic in mm/fault.c,
since we don't have access to the fault code in the
exception handling return path. */
- if (!__access_ok((unsigned long)va, 0, USER_DS))
+ if ((unsigned long)va >= TASK_SIZE)
info.si_code = SEGV_ACCERR;
else {
struct mm_struct *mm = current->mm;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.