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-rw-r--r--arch/sparc/kernel/unaligned.c252
1 files changed, 47 insertions, 205 deletions
diff --git a/arch/sparc/kernel/unaligned.c b/arch/sparc/kernel/unaligned.c
index a6330fbc9dd9..33857be16661 100644
--- a/arch/sparc/kernel/unaligned.c
+++ b/arch/sparc/kernel/unaligned.c
@@ -175,157 +175,31 @@ static void unaligned_panic(char *str)
panic(str);
}
-#define do_integer_load(dest_reg, size, saddr, is_signed, errh) ({ \
-__asm__ __volatile__ ( \
- "cmp %1, 8\n\t" \
- "be 9f\n\t" \
- " cmp %1, 4\n\t" \
- "be 6f\n" \
-"4:\t" " ldub [%2], %%l1\n" \
-"5:\t" "ldub [%2 + 1], %%l2\n\t" \
- "sll %%l1, 8, %%l1\n\t" \
- "tst %3\n\t" \
- "be 3f\n\t" \
- " add %%l1, %%l2, %%l1\n\t" \
- "sll %%l1, 16, %%l1\n\t" \
- "sra %%l1, 16, %%l1\n" \
-"3:\t" "b 0f\n\t" \
- " st %%l1, [%0]\n" \
-"6:\t" "ldub [%2 + 1], %%l2\n\t" \
- "sll %%l1, 24, %%l1\n" \
-"7:\t" "ldub [%2 + 2], %%g7\n\t" \
- "sll %%l2, 16, %%l2\n" \
-"8:\t" "ldub [%2 + 3], %%g1\n\t" \
- "sll %%g7, 8, %%g7\n\t" \
- "or %%l1, %%l2, %%l1\n\t" \
- "or %%g7, %%g1, %%g7\n\t" \
- "or %%l1, %%g7, %%l1\n\t" \
- "b 0f\n\t" \
- " st %%l1, [%0]\n" \
-"9:\t" "ldub [%2], %%l1\n" \
-"10:\t" "ldub [%2 + 1], %%l2\n\t" \
- "sll %%l1, 24, %%l1\n" \
-"11:\t" "ldub [%2 + 2], %%g7\n\t" \
- "sll %%l2, 16, %%l2\n" \
-"12:\t" "ldub [%2 + 3], %%g1\n\t" \
- "sll %%g7, 8, %%g7\n\t" \
- "or %%l1, %%l2, %%l1\n\t" \
- "or %%g7, %%g1, %%g7\n\t" \
- "or %%l1, %%g7, %%g7\n" \
-"13:\t" "ldub [%2 + 4], %%l1\n\t" \
- "st %%g7, [%0]\n" \
-"14:\t" "ldub [%2 + 5], %%l2\n\t" \
- "sll %%l1, 24, %%l1\n" \
-"15:\t" "ldub [%2 + 6], %%g7\n\t" \
- "sll %%l2, 16, %%l2\n" \
-"16:\t" "ldub [%2 + 7], %%g1\n\t" \
- "sll %%g7, 8, %%g7\n\t" \
- "or %%l1, %%l2, %%l1\n\t" \
- "or %%g7, %%g1, %%g7\n\t" \
- "or %%l1, %%g7, %%g7\n\t" \
- "st %%g7, [%0 + 4]\n" \
-"0:\n\n\t" \
- ".section __ex_table,#alloc\n\t" \
- ".word 4b, " #errh "\n\t" \
- ".word 5b, " #errh "\n\t" \
- ".word 6b, " #errh "\n\t" \
- ".word 7b, " #errh "\n\t" \
- ".word 8b, " #errh "\n\t" \
- ".word 9b, " #errh "\n\t" \
- ".word 10b, " #errh "\n\t" \
- ".word 11b, " #errh "\n\t" \
- ".word 12b, " #errh "\n\t" \
- ".word 13b, " #errh "\n\t" \
- ".word 14b, " #errh "\n\t" \
- ".word 15b, " #errh "\n\t" \
- ".word 16b, " #errh "\n\n\t" \
- ".previous\n\t" \
- : : "r" (dest_reg), "r" (size), "r" (saddr), "r" (is_signed) \
- : "l1", "l2", "g7", "g1", "cc"); \
-})
-
-#define store_common(dst_addr, size, src_val, errh) ({ \
-__asm__ __volatile__ ( \
- "ld [%2], %%l1\n" \
- "cmp %1, 2\n\t" \
- "be 2f\n\t" \
- " cmp %1, 4\n\t" \
- "be 1f\n\t" \
- " srl %%l1, 24, %%l2\n\t" \
- "srl %%l1, 16, %%g7\n" \
-"4:\t" "stb %%l2, [%0]\n\t" \
- "srl %%l1, 8, %%l2\n" \
-"5:\t" "stb %%g7, [%0 + 1]\n\t" \
- "ld [%2 + 4], %%g7\n" \
-"6:\t" "stb %%l2, [%0 + 2]\n\t" \
- "srl %%g7, 24, %%l2\n" \
-"7:\t" "stb %%l1, [%0 + 3]\n\t" \
- "srl %%g7, 16, %%l1\n" \
-"8:\t" "stb %%l2, [%0 + 4]\n\t" \
- "srl %%g7, 8, %%l2\n" \
-"9:\t" "stb %%l1, [%0 + 5]\n" \
-"10:\t" "stb %%l2, [%0 + 6]\n\t" \
- "b 0f\n" \
-"11:\t" " stb %%g7, [%0 + 7]\n" \
-"1:\t" "srl %%l1, 16, %%g7\n" \
-"12:\t" "stb %%l2, [%0]\n\t" \
- "srl %%l1, 8, %%l2\n" \
-"13:\t" "stb %%g7, [%0 + 1]\n" \
-"14:\t" "stb %%l2, [%0 + 2]\n\t" \
- "b 0f\n" \
-"15:\t" " stb %%l1, [%0 + 3]\n" \
-"2:\t" "srl %%l1, 8, %%l2\n" \
-"16:\t" "stb %%l2, [%0]\n" \
-"17:\t" "stb %%l1, [%0 + 1]\n" \
-"0:\n\n\t" \
- ".section __ex_table,#alloc\n\t" \
- ".word 4b, " #errh "\n\t" \
- ".word 5b, " #errh "\n\t" \
- ".word 6b, " #errh "\n\t" \
- ".word 7b, " #errh "\n\t" \
- ".word 8b, " #errh "\n\t" \
- ".word 9b, " #errh "\n\t" \
- ".word 10b, " #errh "\n\t" \
- ".word 11b, " #errh "\n\t" \
- ".word 12b, " #errh "\n\t" \
- ".word 13b, " #errh "\n\t" \
- ".word 14b, " #errh "\n\t" \
- ".word 15b, " #errh "\n\t" \
- ".word 16b, " #errh "\n\t" \
- ".word 17b, " #errh "\n\n\t" \
- ".previous\n\t" \
- : : "r" (dst_addr), "r" (size), "r" (src_val) \
- : "l1", "l2", "g7", "g1", "cc"); \
-})
-
-#define do_integer_store(reg_num, size, dst_addr, regs, errh) ({ \
- unsigned long *src_val; \
- static unsigned long zero[2] = { 0, }; \
- \
- if (reg_num) src_val = fetch_reg_addr(reg_num, regs); \
- else { \
- src_val = &zero[0]; \
- if (size == 8) \
- zero[1] = fetch_reg(1, regs); \
- } \
- store_common(dst_addr, size, src_val, errh); \
-})
+/* una_asm.S */
+extern int do_int_load(unsigned long *dest_reg, int size,
+ unsigned long *saddr, int is_signed);
+extern int __do_int_store(unsigned long *dst_addr, int size,
+ unsigned long *src_val);
+
+static int do_int_store(int reg_num, int size, unsigned long *dst_addr,
+ struct pt_regs *regs)
+{
+ unsigned long zero[2] = { 0, 0 };
+ unsigned long *src_val;
+
+ if (reg_num)
+ src_val = fetch_reg_addr(reg_num, regs);
+ else {
+ src_val = &zero[0];
+ if (size == 8)
+ zero[1] = fetch_reg(1, regs);
+ }
+ return __do_int_store(dst_addr, size, src_val);
+}
extern void smp_capture(void);
extern void smp_release(void);
-#define do_atomic(srcdest_reg, mem, errh) ({ \
- unsigned long flags, tmp; \
- \
- smp_capture(); \
- local_irq_save(flags); \
- tmp = *srcdest_reg; \
- do_integer_load(srcdest_reg, 4, mem, 0, errh); \
- store_common(mem, 4, &tmp, errh); \
- local_irq_restore(flags); \
- smp_release(); \
-})
-
static inline void advance(struct pt_regs *regs)
{
regs->pc = regs->npc;
@@ -342,9 +216,7 @@ static inline int ok_for_kernel(unsigned int insn)
return !floating_point_load_or_store_p(insn);
}
-void kernel_mna_trap_fault(struct pt_regs *regs, unsigned int insn) __asm__ ("kernel_mna_trap_fault");
-
-void kernel_mna_trap_fault(struct pt_regs *regs, unsigned int insn)
+static void kernel_mna_trap_fault(struct pt_regs *regs, unsigned int insn)
{
unsigned long g2 = regs->u_regs [UREG_G2];
unsigned long fixup = search_extables_range(regs->pc, &g2);
@@ -379,48 +251,34 @@ asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn)
printk("Unsupported unaligned load/store trap for kernel at <%08lx>.\n",
regs->pc);
unaligned_panic("Wheee. Kernel does fpu/atomic unaligned load/store.");
-
- __asm__ __volatile__ ("\n"
-"kernel_unaligned_trap_fault:\n\t"
- "mov %0, %%o0\n\t"
- "call kernel_mna_trap_fault\n\t"
- " mov %1, %%o1\n\t"
- :
- : "r" (regs), "r" (insn)
- : "o0", "o1", "o2", "o3", "o4", "o5", "o7",
- "g1", "g2", "g3", "g4", "g5", "g7", "cc");
} else {
unsigned long addr = compute_effective_address(regs, insn);
+ int err;
#ifdef DEBUG_MNA
printk("KMNA: pc=%08lx [dir=%s addr=%08lx size=%d] retpc[%08lx]\n",
regs->pc, dirstrings[dir], addr, size, regs->u_regs[UREG_RETPC]);
#endif
- switch(dir) {
+ switch (dir) {
case load:
- do_integer_load(fetch_reg_addr(((insn>>25)&0x1f), regs),
- size, (unsigned long *) addr,
- decode_signedness(insn),
- kernel_unaligned_trap_fault);
+ err = do_int_load(fetch_reg_addr(((insn>>25)&0x1f),
+ regs),
+ size, (unsigned long *) addr,
+ decode_signedness(insn));
break;
case store:
- do_integer_store(((insn>>25)&0x1f), size,
- (unsigned long *) addr, regs,
- kernel_unaligned_trap_fault);
+ err = do_int_store(((insn>>25)&0x1f), size,
+ (unsigned long *) addr, regs);
break;
-#if 0 /* unsupported */
- case both:
- do_atomic(fetch_reg_addr(((insn>>25)&0x1f), regs),
- (unsigned long *) addr,
- kernel_unaligned_trap_fault);
- break;
-#endif
default:
panic("Impossible kernel unaligned trap.");
/* Not reached... */
}
- advance(regs);
+ if (err)
+ kernel_mna_trap_fault(regs, insn);
+ else
+ advance(regs);
}
}
@@ -459,9 +317,7 @@ static inline int ok_for_user(struct pt_regs *regs, unsigned int insn,
return 0;
}
-void user_mna_trap_fault(struct pt_regs *regs, unsigned int insn) __asm__ ("user_mna_trap_fault");
-
-void user_mna_trap_fault(struct pt_regs *regs, unsigned int insn)
+static void user_mna_trap_fault(struct pt_regs *regs, unsigned int insn)
{
siginfo_t info;
@@ -485,7 +341,7 @@ asmlinkage void user_unaligned_trap(struct pt_regs *regs, unsigned int insn)
if(!ok_for_user(regs, insn, dir)) {
goto kill_user;
} else {
- int size = decode_access_size(insn);
+ int err, size = decode_access_size(insn);
unsigned long addr;
if(floating_point_load_or_store_p(insn)) {
@@ -496,48 +352,34 @@ asmlinkage void user_unaligned_trap(struct pt_regs *regs, unsigned int insn)
addr = compute_effective_address(regs, insn);
switch(dir) {
case load:
- do_integer_load(fetch_reg_addr(((insn>>25)&0x1f), regs),
- size, (unsigned long *) addr,
- decode_signedness(insn),
- user_unaligned_trap_fault);
+ err = do_int_load(fetch_reg_addr(((insn>>25)&0x1f),
+ regs),
+ size, (unsigned long *) addr,
+ decode_signedness(insn));
break;
case store:
- do_integer_store(((insn>>25)&0x1f), size,
- (unsigned long *) addr, regs,
- user_unaligned_trap_fault);
+ err = do_int_store(((insn>>25)&0x1f), size,
+ (unsigned long *) addr, regs);
break;
case both:
-#if 0 /* unsupported */
- do_atomic(fetch_reg_addr(((insn>>25)&0x1f), regs),
- (unsigned long *) addr,
- user_unaligned_trap_fault);
-#else
/*
* This was supported in 2.4. However, we question
* the value of SWAP instruction across word boundaries.
*/
printk("Unaligned SWAP unsupported.\n");
- goto kill_user;
-#endif
+ err = -EFAULT;
break;
default:
unaligned_panic("Impossible user unaligned trap.");
-
- __asm__ __volatile__ ("\n"
-"user_unaligned_trap_fault:\n\t"
- "mov %0, %%o0\n\t"
- "call user_mna_trap_fault\n\t"
- " mov %1, %%o1\n\t"
- :
- : "r" (regs), "r" (insn)
- : "o0", "o1", "o2", "o3", "o4", "o5", "o7",
- "g1", "g2", "g3", "g4", "g5", "g7", "cc");
goto out;
}
- advance(regs);
+ if (err)
+ goto kill_user;
+ else
+ advance(regs);
goto out;
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.