Messages in this thread Patch in this message | | | Date | Thu, 1 Mar 2007 02:13:58 -0500 | From | Mathieu Desnoyers <> | Subject | [PATCH] linux-kernel-markers-i386-optimization-flags |
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linux-kernel-markers-i386-optimization-flags
i386 marker optimization flags support. Also fixes the @progbits assembly section declaration.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
--- a/arch/i386/kernel/marker.c +++ b/arch/i386/kernel/marker.c @@ -40,7 +40,7 @@ static int mark_notifier(struct notifier_block *nb, { enum die_val die_val = (enum die_val) val; struct die_args *args = (struct die_args *)data; - + if (!args->regs || user_mode_vm(args->regs)) return NOTIFY_DONE; @@ -56,7 +56,7 @@ static struct notifier_block mark_notify = { .priority = 0x7fffffff, /* we need to be notified first */ }; -int arch_marker_set_ins_enable(void *address, char enable) +int marker_optimized_set_enable(void *address, char enable) { char saved_byte; int ret; @@ -91,4 +91,4 @@ int arch_marker_set_ins_enable(void *address, char enable) flush_icache_range(address, size); return 0; } -EXPORT_SYMBOL_GPL(arch_marker_set_ins_enable); +EXPORT_SYMBOL_GPL(marker_optimized_set_enable); --- a/include/asm-i386/marker.h +++ b/include/asm-i386/marker.h @@ -11,16 +11,19 @@ #ifdef CONFIG_MARKERS -#define MARK(name, format, args...) \ + +#define _MF_DEFAULT (_MF_OPTIMIZED | _MF_LOCKDEP | _MF_PRINTK) + +#define MARK_OPTIMIZED(flags, name, format, args...) \ do { \ static marker_probe_func *__mark_call_##name = \ __mark_empty_function; \ static const struct __mark_marker_c __mark_c_##name \ __attribute__((section(".markers.c"))) = \ { #name, &__mark_call_##name, format, \ - MARKER_OPTIMIZED } ; \ + (flags) | _MF_OPTIMIZED } ; \ char condition; \ - asm volatile( ".section .markers, \"a\";\n\t" \ + asm volatile( ".section .markers, \"a\", @progbits;\n\t" \ ".long %1, 0f;\n\t" \ ".previous;\n\t" \ ".align 2\n\t" \ @@ -36,12 +39,25 @@ } \ } while (0) +#define _MARK(flags, format, args...) \ +do { \ + if (((flags) & _MF_LOCKDEP) && ((flags) & _MF_OPTIMIZED)) \ + MARK_OPTIMIZED(flags, format, ## args); \ + else \ + MARK_GENERIC(flags, format, ## args); \ +} while (0) + +#define MARK(format, args...) _MARK(_MF_DEFAULT, format, ## args) + /* Offset of the immediate value from the start of the movb instruction, in * bytes. */ -#define MARK_ENABLE_IMMEDIATE_OFFSET 1 -#define MARK_ENABLE_TYPE char -#define MARK_POLYMORPHIC +#define MARK_OPTIMIZED_ENABLE_IMMEDIATE_OFFSET 1 +#define MARK_OPTIMIZED_ENABLE_TYPE char +/* Dereference enable as lvalue from a pointer to its instruction */ +#define MARK_OPTIMIZED_ENABLE(a) \ + *(MARK_OPTIMIZED_ENABLE_TYPE*) \ + ((char*)a+MARK_OPTIMIZED_ENABLE_IMMEDIATE_OFFSET) -extern int arch_marker_set_ins_enable(void *address, char enable); +extern int marker_optimized_set_enable(void *address, char enable); #endif -- Mathieu Desnoyers Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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