]> pilppa.com Git - linux-2.6-omap-h63xx.git/commitdiff
[SPARC]: Fix link errors with gcc-4.3
authorDavid S. Miller <davem@davemloft.net>
Mon, 3 Mar 2008 23:01:05 +0000 (15:01 -0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 3 Mar 2008 23:01:05 +0000 (15:01 -0800)
Reported by Adrian Bunk.

Just like in changeset a3f9985843b674cbcb58f39fab8416675e7ab842
("[SPARC64]: Move kernel unaligned trap handlers into assembler
file.") we have to move the assembler bits into a seperate
asm file because as far as the compiler is concerned
these inline bits we're doing in unaligned.c are unreachable.

Signed-off-by: David S. Miller <davem@davemloft.net>
arch/sparc/kernel/Makefile
arch/sparc/kernel/una_asm.S [new file with mode: 0644]
arch/sparc/kernel/unaligned.c

index e795f282dece9f29d6914bc639ffb0c73da5d9f9..bf1b15d3f6f58be2265f1d6e13a0bbf22c9c0862 100644 (file)
@@ -1,4 +1,4 @@
-# $Id: Makefile,v 1.62 2000/12/15 00:41:17 davem Exp $
+#
 # Makefile for the linux kernel.
 #
 
@@ -12,7 +12,8 @@ obj-y    := entry.o wof.o wuf.o etrap.o rtrap.o traps.o $(IRQ_OBJS) \
            sys_sparc.o sunos_asm.o systbls.o \
            time.o windows.o cpu.o devices.o sclow.o \
            tadpole.o tick14.o ptrace.o sys_solaris.o \
-           unaligned.o muldiv.o semaphore.o prom.o of_device.o devres.o
+           unaligned.o una_asm.o muldiv.o semaphore.o \
+           prom.o of_device.o devres.o
 
 devres-y = ../../../kernel/irq/devres.o
 
diff --git a/arch/sparc/kernel/una_asm.S b/arch/sparc/kernel/una_asm.S
new file mode 100644 (file)
index 0000000..8cc0345
--- /dev/null
@@ -0,0 +1,153 @@
+/* una_asm.S: Kernel unaligned trap assembler helpers.
+ *
+ * Copyright (C) 1996,2005,2008 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+#include <linux/errno.h>
+
+       .text
+
+retl_efault:
+       retl
+        mov    -EFAULT, %o0
+
+       /* int __do_int_store(unsigned long *dst_addr, int size,
+        *                    unsigned long *src_val)
+        *
+        * %o0 = dest_addr
+        * %o1 = size
+        * %o2 = src_val
+        *
+        * Return '0' on success, -EFAULT on failure.
+        */
+       .globl  __do_int_store
+__do_int_store:
+       ld      [%o2], %g1
+       cmp     %1, 2
+       be      2f
+        cmp    %1, 4
+       be      1f
+        srl    %g1, 24, %g2
+       srl     %g1, 16, %g7
+4:     stb     %g2, [%o0]
+       srl     %g1, 8, %g2
+5:     stb     %g7, [%o0 + 1]
+       ld      [%o2 + 4], %g7
+6:     stb     %g2, [%o0 + 2]
+       srl     %g7, 24, %g2
+7:     stb     %g1, [%o0 + 3]
+       srl     %g7, 16, %g1
+8:     stb     %g2, [%o0 + 4]
+       srl     %g7, 8, %g2
+9:     stb     %g1, [%o0 + 5]
+10:    stb     %g2, [%o0 + 6]
+       b       0f
+11:     stb    %g7, [%o0 + 7]
+1:     srl     %g1, 16, %g7
+12:    stb     %g2, [%o0]
+       srl     %g1, 8, %g2
+13:    stb     %g7, [%o0 + 1]
+14:    stb     %g2, [%o0 + 2]
+       b       0f
+15:     stb    %g1, [%o0 + 3]
+2:     srl     %g1, 8, %g2
+16:    stb     %g2, [%o0]
+17:    stb     %g1, [%o0 + 1]
+0:     retl
+        mov    0, %o0
+
+       .section __ex_table,#alloc
+       .word   4b, retl_efault
+       .word   5b, retl_efault
+       .word   6b, retl_efault
+       .word   7b, retl_efault
+       .word   8b, retl_efault
+       .word   9b, retl_efault
+       .word   10b, retl_efault
+       .word   11b, retl_efault
+       .word   12b, retl_efault
+       .word   13b, retl_efault
+       .word   14b, retl_efault
+       .word   15b, retl_efault
+       .word   16b, retl_efault
+       .word   17b, retl_efault
+       .previous
+
+       /* int do_int_load(unsigned long *dest_reg, int size,
+        *                 unsigned long *saddr, int is_signed)
+        *
+        * %o0 = dest_reg
+        * %o1 = size
+        * %o2 = saddr
+        * %o3 = is_signed
+        *
+        * Return '0' on success, -EFAULT on failure.
+        */
+       .globl  do_int_load
+do_int_load:
+       cmp     %o1, 8
+       be      9f
+        cmp    %o1, 4
+       be      6f
+4:      ldub   [%o2], %g1
+5:     ldub    [%o2 + 1], %g2
+       sll     %g1, 8, %g1
+       tst     %o3
+       be      3f
+        or     %g1, %g2, %g1
+       sll     %g1, 16, %g1
+       sra     %g1, 16, %g1
+3:     b       0f
+        st     %g1, [%o0]
+6:     ldub    [%o2 + 1], %g2
+       sll     %g1, 24, %g1
+7:     ldub    [%o2 + 2], %g7
+       sll     %g2, 16, %g2
+8:     ldub    [%o2 + 3], %g3
+       sll     %g7, 8, %g7
+       or      %g3, %g2, %g3
+       or      %g7, %g3, %g7
+       or      %g1, %g7, %g1
+       b       0f
+        st     %g1, [%o0]
+9:     ldub    [%o2], %g1
+10:    ldub    [%o2 + 1], %g2
+       sll     %g1, 24, %g1
+11:    ldub    [%o2 + 2], %g7
+       sll     %g2, 16, %g2
+12:    ldub    [%o2 + 3], %g3
+       sll     %g7, 8, %g7
+       or      %g1, %g2, %g1
+       or      %g7, %g3, %g7
+       or      %g1, %g7, %g7
+13:    ldub    [%o2 + 4], %g1
+       st      %g7, [%o0]
+14:    ldub    [%o2 + 5], %g2
+       sll     %g1, 24, %g1
+15:    ldub    [%o2 + 6], %g7
+       sll     %g2, 16, %g2
+16:    ldub    [%o2 + 7], %g3
+       sll     %g7, 8, %g7
+       or      %g1, %g2, %g1
+       or      %g7, %g3, %g7
+       or      %g1, %g7, %g7
+       st      %g7, [%o0 + 4]
+0:     retl
+        mov    0, %o0
+
+       .section __ex_table,#alloc
+       .word   4b, retl_efault
+       .word   5b, retl_efault
+       .word   6b, retl_efault
+       .word   7b, retl_efault
+       .word   8b, retl_efault
+       .word   9b, retl_efault
+       .word   10b, retl_efault
+       .word   11b, retl_efault
+       .word   12b, retl_efault
+       .word   13b, retl_efault
+       .word   14b, retl_efault
+       .word   15b, retl_efault
+       .word   16b, retl_efault
+       .previous
index a6330fbc9dd935a805aa7b9f05f12dbfe605579a..33857be16661a53e7b2c1741eb51ab02a5fee020 100644 (file)
@@ -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;
        }