Messages in this thread Patch in this message | | | Date | Wed, 21 May 2008 19:24:30 -0400 | From | Mathieu Desnoyers <> | Subject | Re: [PATCH] Fix Immediate Values x86_64 support old gcc (v3) |
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GCC < 4, on x86_64, does not accept symbol+offset operands for "i" constraints asm statements. Fallback on generic immediate values if this compiler is detected.
Changelog : - USE_IMMEDIATE must now be used in lieue of CONFIG_IMMEDIATE in Makefiles and in C code. - Every architecture implementing immediate values must declare USE_IMMEDIATE in their Makefile. - Tab -> spaces in Makefiles.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> CC: Sam Ravnborg <sam@ravnborg.org> CC: "H. Peter Anvin" <hpa@zytor.com> CC: Jeremy Fitzhardinge <jeremy@goop.org> CC: Ingo Molnar <mingo@elte.hu> CC: David Miller <davem@davemloft.net> CC: Paul Mackerras <paulus@samba.org> --- Makefile | 5 +++++ arch/powerpc/Makefile | 2 ++ arch/powerpc/kernel/Makefile | 2 +- arch/x86/Makefile | 5 +++++ arch/x86/kernel/Makefile | 2 +- arch/x86/kernel/traps_32.c | 4 ++-- include/linux/immediate.h | 2 +- include/linux/module.h | 4 ++-- kernel/Makefile | 2 +- kernel/module.c | 8 ++++---- 10 files changed, 24 insertions(+), 12 deletions(-)
Index: linux-2.6-sched-devel/arch/x86/Makefile =================================================================== --- linux-2.6-sched-devel.orig/arch/x86/Makefile 2008-05-21 15:16:06.000000000 -0400 +++ linux-2.6-sched-devel/arch/x86/Makefile 2008-05-21 15:53:00.000000000 -0400 @@ -43,6 +43,7 @@ # temporary until string.h is fixed KBUILD_CFLAGS += -ffreestanding + export USE_IMMEDIATE := $(CONFIG_IMMEDIATE) else BITS := 64 UTS_MACHINE := x86_64 @@ -78,6 +79,10 @@ "$(CC)" -fstack-protector-all ) KBUILD_CFLAGS += $(stackp-y) + + # x86_64 gcc 3.x has problems with passing symbol+offset in + # asm "i" constraint. + export USE_IMMEDIATE := $(call cc-ifversion, -ge, 0400, $(CONFIG_IMMEDIATE)) endif # Stackpointer is addressed different for 32 bit and 64 bit x86 Index: linux-2.6-sched-devel/include/linux/immediate.h =================================================================== --- linux-2.6-sched-devel.orig/include/linux/immediate.h 2008-05-21 15:16:06.000000000 -0400 +++ linux-2.6-sched-devel/include/linux/immediate.h 2008-05-21 15:16:59.000000000 -0400 @@ -10,7 +10,7 @@ * See the file COPYING for more details. */ -#ifdef CONFIG_IMMEDIATE +#ifdef USE_IMMEDIATE #include <asm/immediate.h> Index: linux-2.6-sched-devel/arch/x86/kernel/Makefile =================================================================== --- linux-2.6-sched-devel.orig/arch/x86/kernel/Makefile 2008-05-21 15:16:51.000000000 -0400 +++ linux-2.6-sched-devel/arch/x86/kernel/Makefile 2008-05-21 15:16:59.000000000 -0400 @@ -75,7 +75,7 @@ obj-$(CONFIG_KPROBES) += kprobes.o obj-$(CONFIG_MODULES) += module_$(BITS).o obj-$(CONFIG_ACPI_SRAT) += srat_32.o -obj-$(CONFIG_IMMEDIATE) += immediate.o +obj-$(USE_IMMEDIATE) += immediate.o obj-$(CONFIG_EFI) += efi.o efi_$(BITS).o efi_stub_$(BITS).o obj-$(CONFIG_DOUBLEFAULT) += doublefault_32.o obj-$(CONFIG_KGDB) += kgdb.o Index: linux-2.6-sched-devel/kernel/Makefile =================================================================== --- linux-2.6-sched-devel.orig/kernel/Makefile 2008-05-21 15:16:52.000000000 -0400 +++ linux-2.6-sched-devel/kernel/Makefile 2008-05-21 15:16:59.000000000 -0400 @@ -75,7 +75,7 @@ obj-$(CONFIG_SYSCTL) += utsname_sysctl.o obj-$(CONFIG_TASK_DELAY_ACCT) += delayacct.o obj-$(CONFIG_TASKSTATS) += taskstats.o tsacct.o -obj-$(CONFIG_IMMEDIATE) += immediate.o +obj-$(USE_IMMEDIATE) += immediate.o obj-$(CONFIG_MARKERS) += marker.o obj-$(CONFIG_LATENCYTOP) += latencytop.o obj-$(CONFIG_FTRACE) += trace/ Index: linux-2.6-sched-devel/arch/powerpc/Makefile =================================================================== --- linux-2.6-sched-devel.orig/arch/powerpc/Makefile 2008-05-21 15:16:06.000000000 -0400 +++ linux-2.6-sched-devel/arch/powerpc/Makefile 2008-05-21 15:16:59.000000000 -0400 @@ -98,6 +98,8 @@ endif endif +export USE_IMMEDIATE := $(CONFIG_IMMEDIATE) + ifeq ($(CONFIG_TUNE_CELL),y) KBUILD_CFLAGS += $(call cc-option,-mtune=cell) endif Index: linux-2.6-sched-devel/Makefile =================================================================== --- linux-2.6-sched-devel.orig/Makefile 2008-05-21 15:16:51.000000000 -0400 +++ linux-2.6-sched-devel/Makefile 2008-05-21 15:16:59.000000000 -0400 @@ -532,6 +532,11 @@ KBUILD_CFLAGS += -pg endif +# arch Makefile detects if the compiler permits use of immediate values +ifdef USE_IMMEDIATE +KBUILD_CFLAGS += -DUSE_IMMEDIATE +endif + # We trigger additional mismatches with less inlining ifdef CONFIG_DEBUG_SECTION_MISMATCH KBUILD_CFLAGS += $(call cc-option, -fno-inline-functions-called-once) Index: linux-2.6-sched-devel/arch/powerpc/kernel/Makefile =================================================================== --- linux-2.6-sched-devel.orig/arch/powerpc/kernel/Makefile 2008-05-21 15:16:06.000000000 -0400 +++ linux-2.6-sched-devel/arch/powerpc/kernel/Makefile 2008-05-21 15:16:59.000000000 -0400 @@ -45,7 +45,7 @@ obj64-$(CONFIG_HIBERNATION) += swsusp_asm64.o obj-$(CONFIG_MODULES) += module_$(CONFIG_WORD_SIZE).o obj-$(CONFIG_44x) += cpu_setup_44x.o -obj-$(CONFIG_IMMEDIATE) += immediate.o +obj-$(USE_IMMEDIATE) += immediate.o ifeq ($(CONFIG_PPC_MERGE),y) Index: linux-2.6-sched-devel/kernel/module.c =================================================================== --- linux-2.6-sched-devel.orig/kernel/module.c 2008-05-21 15:16:52.000000000 -0400 +++ linux-2.6-sched-devel/kernel/module.c 2008-05-21 15:16:59.000000000 -0400 @@ -2013,7 +2013,7 @@ mod->gpl_future_syms = (void *)sechdrs[gplfutureindex].sh_addr; if (gplfuturecrcindex) mod->gpl_future_crcs = (void *)sechdrs[gplfuturecrcindex].sh_addr; -#ifdef CONFIG_IMMEDIATE +#ifdef USE_IMMEDIATE mod->immediate = (void *)sechdrs[immediateindex].sh_addr; mod->num_immediate = sechdrs[immediateindex].sh_size / sizeof(*mod->immediate); @@ -2097,7 +2097,7 @@ marker_update_probe_range(mod->markers, mod->markers + mod->num_markers); #endif -#ifdef CONFIG_IMMEDIATE +#ifdef USE_IMMEDIATE /* Immediate values must be updated after markers */ imv_update_range(mod->immediate, mod->immediate + mod->num_immediate); @@ -2258,7 +2258,7 @@ /* Drop initial reference. */ module_put(mod); unwind_remove_table(mod->unwind_info, 1); -#ifdef CONFIG_IMMEDIATE +#ifdef USE_IMMEDIATE imv_unref(mod->immediate, mod->immediate + mod->num_immediate, mod->module_init, mod->init_size); #endif @@ -2657,7 +2657,7 @@ } #endif -#ifdef CONFIG_IMMEDIATE +#ifdef USE_IMMEDIATE /** * _module_imv_update - update all immediate values in the kernel * Index: linux-2.6-sched-devel/include/linux/module.h =================================================================== --- linux-2.6-sched-devel.orig/include/linux/module.h 2008-05-21 15:16:52.000000000 -0400 +++ linux-2.6-sched-devel/include/linux/module.h 2008-05-21 15:16:59.000000000 -0400 @@ -339,7 +339,7 @@ /* The command line arguments (may be mangled). People like keeping pointers to this stuff */ char *args; -#ifdef CONFIG_IMMEDIATE +#ifdef USE_IMMEDIATE struct __imv *immediate; unsigned int num_immediate; unsigned long *immediate_cond_end; @@ -563,7 +563,7 @@ #endif /* CONFIG_MODULES */ -#if defined(CONFIG_MODULES) && defined(CONFIG_IMMEDIATE) +#if defined(CONFIG_MODULES) && defined(USE_IMMEDIATE) extern void _module_imv_update(void); extern void module_imv_update(void); extern int is_imv_cond_end_module(unsigned long addr1, unsigned long addr2); Index: linux-2.6-sched-devel/arch/x86/kernel/traps_32.c =================================================================== --- linux-2.6-sched-devel.orig/arch/x86/kernel/traps_32.c 2008-05-21 15:16:06.000000000 -0400 +++ linux-2.6-sched-devel/arch/x86/kernel/traps_32.c 2008-05-21 15:16:59.000000000 -0400 @@ -595,7 +595,7 @@ } DO_VM86_ERROR_INFO(0, SIGFPE, "divide error", divide_error, FPE_INTDIV, regs->ip) -#if !defined(CONFIG_KPROBES) && !defined(CONFIG_IMMEDIATE) +#if !defined(CONFIG_KPROBES) && !defined(USE_IMMEDIATE) DO_VM86_ERROR(3, SIGTRAP, "int3", int3) #endif DO_VM86_ERROR(4, SIGSEGV, "overflow", overflow) @@ -860,7 +860,7 @@ acpi_nmi_enable(); } -#if defined(CONFIG_KPROBES) || defined(CONFIG_IMMEDIATE) +#if defined(CONFIG_KPROBES) || defined(USE_IMMEDIATE) void __kprobes do_int3(struct pt_regs *regs, long error_code) { trace_hardirqs_fixup(); -- Mathieu Desnoyers OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
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