From f0e98c387e61de00646be31fab4c2fa0224e1efb Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 3 Mar 2008 15:01:05 -0800 Subject: [PATCH] [SPARC]: Fix link errors with gcc-4.3 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 --- arch/sparc/kernel/Makefile | 5 +- arch/sparc/kernel/una_asm.S | 153 +++++++++++++++++++++ arch/sparc/kernel/unaligned.c | 252 +++++++--------------------------- 3 files changed, 203 insertions(+), 207 deletions(-) create mode 100644 arch/sparc/kernel/una_asm.S diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile index e795f282dece..bf1b15d3f6f5 100644 --- a/arch/sparc/kernel/Makefile +++ b/arch/sparc/kernel/Makefile @@ -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 index 000000000000..8cc03458eb7e --- /dev/null +++ b/arch/sparc/kernel/una_asm.S @@ -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 + + .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 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; } -- 2.39.5