[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [RFC PATCH 12/28] x86/pm-trace: Use RIP-relative accesses for .tracedata
From: Ard Biesheuvel <ardb@xxxxxxxxxx> Use RIP-relative accesses and 32-bit offsets for .tracedata, to avoid the need for relocation fixups at boot time. Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx> --- arch/x86/include/asm/pm-trace.h | 4 ++-- drivers/base/power/trace.c | 6 +++--- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/x86/include/asm/pm-trace.h b/arch/x86/include/asm/pm-trace.h index bfa32aa428e5..123faf978473 100644 --- a/arch/x86/include/asm/pm-trace.h +++ b/arch/x86/include/asm/pm-trace.h @@ -8,10 +8,10 @@ do { \ if (pm_trace_enabled) { \ const void *tracedata; \ - asm volatile(_ASM_MOV " $1f,%0\n" \ + asm volatile("lea " _ASM_RIP(1f) ", %0\n" \ ".section .tracedata,\"a\"\n" \ "1:\t.word %c1\n\t" \ - _ASM_PTR " %c2\n" \ + ".long %c2 - .\n" \ ".previous" \ :"=r" (tracedata) \ : "i" (__LINE__), "i" (__FILE__)); \ diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c index cd6e559648b2..686a0276ccfc 100644 --- a/drivers/base/power/trace.c +++ b/drivers/base/power/trace.c @@ -167,7 +167,7 @@ EXPORT_SYMBOL(set_trace_device); void generate_pm_trace(const void *tracedata, unsigned int user) { unsigned short lineno = *(unsigned short *)tracedata; - const char *file = *(const char **)(tracedata + 2); + const char *file = offset_to_ptr((int *)(tracedata + 2)); unsigned int user_hash_value, file_hash_value; if (!x86_platform.legacy.rtc) @@ -187,9 +187,9 @@ static int show_file_hash(unsigned int value) match = 0; for (tracedata = __tracedata_start ; tracedata < __tracedata_end ; - tracedata += 2 + sizeof(unsigned long)) { + tracedata += 2 + sizeof(int)) { unsigned short lineno = *(unsigned short *)tracedata; - const char *file = *(const char **)(tracedata + 2); + const char *file = offset_to_ptr((int *)(tracedata + 2)); unsigned int hash = hash_string(lineno, file, FILEHASH); if (hash != value) continue; -- 2.46.0.792.g87dc391469-goog
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |