From a07f7672d7cf0ff0d6e548a9feb6e0bd016d9c6c Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Tue, 28 Feb 2012 13:37:20 +0000 Subject: tools/include: Add byteshift headers for endian access There are various hostprogs in the kernel that are rolling their own implementations of {get,put}_unaligned_le*(). Copy the byteshift headers from include/linux/unaligned so that they can all use a single implementation. This requires changing some of the data types to the userspace exported ones (u32 -> __u32, etc). Signed-off-by: Matt Fleming Link: http://lkml.kernel.org/r/1330436245-24875-2-git-send-email-matt@console-pimps.org Signed-off-by: H. Peter Anvin diff --git a/tools/include/tools/be_byteshift.h b/tools/include/tools/be_byteshift.h new file mode 100644 index 0000000..f4912e2 --- /dev/null +++ b/tools/include/tools/be_byteshift.h @@ -0,0 +1,70 @@ +#ifndef _TOOLS_BE_BYTESHIFT_H +#define _TOOLS_BE_BYTESHIFT_H + +#include + +static inline __u16 __get_unaligned_be16(const __u8 *p) +{ + return p[0] << 8 | p[1]; +} + +static inline __u32 __get_unaligned_be32(const __u8 *p) +{ + return p[0] << 24 | p[1] << 16 | p[2] << 8 | p[3]; +} + +static inline __u64 __get_unaligned_be64(const __u8 *p) +{ + return (__u64)__get_unaligned_be32(p) << 32 | + __get_unaligned_be32(p + 4); +} + +static inline void __put_unaligned_be16(__u16 val, __u8 *p) +{ + *p++ = val >> 8; + *p++ = val; +} + +static inline void __put_unaligned_be32(__u32 val, __u8 *p) +{ + __put_unaligned_be16(val >> 16, p); + __put_unaligned_be16(val, p + 2); +} + +static inline void __put_unaligned_be64(__u64 val, __u8 *p) +{ + __put_unaligned_be32(val >> 32, p); + __put_unaligned_be32(val, p + 4); +} + +static inline __u16 get_unaligned_be16(const void *p) +{ + return __get_unaligned_be16((const __u8 *)p); +} + +static inline __u32 get_unaligned_be32(const void *p) +{ + return __get_unaligned_be32((const __u8 *)p); +} + +static inline __u64 get_unaligned_be64(const void *p) +{ + return __get_unaligned_be64((const __u8 *)p); +} + +static inline void put_unaligned_be16(__u16 val, void *p) +{ + __put_unaligned_be16(val, p); +} + +static inline void put_unaligned_be32(__u32 val, void *p) +{ + __put_unaligned_be32(val, p); +} + +static inline void put_unaligned_be64(__u64 val, void *p) +{ + __put_unaligned_be64(val, p); +} + +#endif /* _TOOLS_BE_BYTESHIFT_H */ diff --git a/tools/include/tools/le_byteshift.h b/tools/include/tools/le_byteshift.h new file mode 100644 index 0000000..c99d45a --- /dev/null +++ b/tools/include/tools/le_byteshift.h @@ -0,0 +1,70 @@ +#ifndef _TOOLS_LE_BYTESHIFT_H +#define _TOOLS_LE_BYTESHIFT_H + +#include + +static inline __u16 __get_unaligned_le16(const __u8 *p) +{ + return p[0] | p[1] << 8; +} + +static inline __u32 __get_unaligned_le32(const __u8 *p) +{ + return p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24; +} + +static inline __u64 __get_unaligned_le64(const __u8 *p) +{ + return (__u64)__get_unaligned_le32(p + 4) << 32 | + __get_unaligned_le32(p); +} + +static inline void __put_unaligned_le16(__u16 val, __u8 *p) +{ + *p++ = val; + *p++ = val >> 8; +} + +static inline void __put_unaligned_le32(__u32 val, __u8 *p) +{ + __put_unaligned_le16(val >> 16, p + 2); + __put_unaligned_le16(val, p); +} + +static inline void __put_unaligned_le64(__u64 val, __u8 *p) +{ + __put_unaligned_le32(val >> 32, p + 4); + __put_unaligned_le32(val, p); +} + +static inline __u16 get_unaligned_le16(const void *p) +{ + return __get_unaligned_le16((const __u8 *)p); +} + +static inline __u32 get_unaligned_le32(const void *p) +{ + return __get_unaligned_le32((const __u8 *)p); +} + +static inline __u64 get_unaligned_le64(const void *p) +{ + return __get_unaligned_le64((const __u8 *)p); +} + +static inline void put_unaligned_le16(__u16 val, void *p) +{ + __put_unaligned_le16(val, p); +} + +static inline void put_unaligned_le32(__u32 val, void *p) +{ + __put_unaligned_le32(val, p); +} + +static inline void put_unaligned_le64(__u64 val, void *p) +{ + __put_unaligned_le64(val, p); +} + +#endif /* _TOOLS_LE_BYTESHIFT_H */ -- cgit v0.10.2 From 55f9709cd07c9d33e30b575ee1b3bfd0aeaa3760 Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Tue, 28 Feb 2012 13:37:21 +0000 Subject: x86, relocs: Don't open code put_unaligned_le32() Use the new headers in tools/include instead of rolling our own put_unaligned_le32() implementation. Cc: H. Peter Anvin Signed-off-by: Matt Fleming Link: http://lkml.kernel.org/r/1330436245-24875-3-git-send-email-matt@console-pimps.org Signed-off-by: H. Peter Anvin diff --git a/arch/x86/boot/compressed/relocs.c b/arch/x86/boot/compressed/relocs.c index 89bbf4e..d3c0b02 100644 --- a/arch/x86/boot/compressed/relocs.c +++ b/arch/x86/boot/compressed/relocs.c @@ -10,6 +10,7 @@ #define USE_BSD #include #include +#include static void die(char *fmt, ...); @@ -605,10 +606,7 @@ static void emit_relocs(int as_text) fwrite("\0\0\0\0", 4, 1, stdout); /* Now print each relocation */ for (i = 0; i < reloc_count; i++) { - buf[0] = (relocs[i] >> 0) & 0xff; - buf[1] = (relocs[i] >> 8) & 0xff; - buf[2] = (relocs[i] >> 16) & 0xff; - buf[3] = (relocs[i] >> 24) & 0xff; + put_unaligned_le32(relocs[i], buf); fwrite(buf, 4, 1, stdout); } } -- cgit v0.10.2 From 12871c568305a0b20f116315479a18cd46882e9b Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Tue, 28 Feb 2012 13:37:22 +0000 Subject: x86, mkpiggy: Don't open code put_unaligned_le32() Use the new headers in tools/include instead of rolling our own put_unaligned_le32() implementation. Cc: H. Peter Anvin Signed-off-by: Matt Fleming Link: http://lkml.kernel.org/r/1330436245-24875-4-git-send-email-matt@console-pimps.org Signed-off-by: H. Peter Anvin diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile index b123b9a..fd55a2f 100644 --- a/arch/x86/boot/compressed/Makefile +++ b/arch/x86/boot/compressed/Makefile @@ -22,6 +22,7 @@ LDFLAGS := -m elf_$(UTS_MACHINE) LDFLAGS_vmlinux := -T hostprogs-y := mkpiggy +HOST_EXTRACFLAGS += -I$(srctree)/tools/include VMLINUX_OBJS = $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o \ $(obj)/string.o $(obj)/cmdline.o $(obj)/early_serial_console.o \ diff --git a/arch/x86/boot/compressed/mkpiggy.c b/arch/x86/boot/compressed/mkpiggy.c index 46a8238..958a641 100644 --- a/arch/x86/boot/compressed/mkpiggy.c +++ b/arch/x86/boot/compressed/mkpiggy.c @@ -29,14 +29,7 @@ #include #include #include - -static uint32_t getle32(const void *p) -{ - const uint8_t *cp = p; - - return (uint32_t)cp[0] + ((uint32_t)cp[1] << 8) + - ((uint32_t)cp[2] << 16) + ((uint32_t)cp[3] << 24); -} +#include int main(int argc, char *argv[]) { @@ -69,7 +62,7 @@ int main(int argc, char *argv[]) } ilen = ftell(f); - olen = getle32(&olen); + olen = get_unaligned_le32(&olen); fclose(f); /* -- cgit v0.10.2 From d40f833630a1299fd377408dc8d8fac370d621b0 Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Tue, 28 Feb 2012 13:37:23 +0000 Subject: x86, boot: Restrict CFLAGS for hostprogs Currently tools/build has access to all the kernel headers in $(srctree). This is unnecessary and could potentially allow tools/build to erroneously include kernel headers when it should only be including userspace-exported headers. Unfortunately, mkcpustr still needs access to some of the asm kernel headers, so explicitly special case that hostprog. Cc: H. Peter Anvin Signed-off-by: Matt Fleming Link: http://lkml.kernel.org/r/1330436245-24875-5-git-send-email-matt@console-pimps.org Signed-off-by: H. Peter Anvin diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile index 95365a8..3e02148 100644 --- a/arch/x86/boot/Makefile +++ b/arch/x86/boot/Makefile @@ -37,8 +37,9 @@ setup-y += video-bios.o targets += $(setup-y) hostprogs-y := mkcpustr tools/build -HOST_EXTRACFLAGS += $(LINUXINCLUDE) - +HOSTCFLAGS_mkcpustr.o := -I$(srctree)/arch/$(SRCARCH)/include +HOST_EXTRACFLAGS += -I$(objtree)/include -I$(srctree)/tools/include \ + -include $(srctree)/include/linux/kconfig.h $(obj)/cpu.o: $(obj)/cpustr.h quiet_cmd_cpustr = CPUSTR $@ -- cgit v0.10.2 From 92f42c50f227ad228f815a8f4eec872524dae3a5 Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Tue, 28 Feb 2012 13:37:24 +0000 Subject: x86, efi: Fix endian issues and unaligned accesses We may need to convert the endianness of the data we read from/write to 'buf', so let's use {get,put}_unaligned_le32() to do that. Failure to do so can result in accessing invalid memory, leading to a segfault. Stephen Rothwell noticed this bug while cross-building an x86_64 allmodconfig kernel on PowerPC. We need to read from and write to 'buf' a byte at a time otherwise it's possible we'll perform an unaligned access, which can lead to bus errors when cross-building an x86 kernel on risc architectures. Cc: H. Peter Anvin Cc: Nick Bowler Tested-by: Stephen Rothwell Reported-by: Stephen Rothwell Signed-off-by: Matt Fleming Link: http://lkml.kernel.org/r/1330436245-24875-6-git-send-email-matt@console-pimps.org Signed-off-by: H. Peter Anvin diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c index 4e9bd6b..f2ac95e 100644 --- a/arch/x86/boot/tools/build.c +++ b/arch/x86/boot/tools/build.c @@ -34,6 +34,7 @@ #include #include #include +#include typedef unsigned char u8; typedef unsigned short u16; @@ -41,6 +42,7 @@ typedef unsigned long u32; #define DEFAULT_MAJOR_ROOT 0 #define DEFAULT_MINOR_ROOT 0 +#define DEFAULT_ROOT_DEV (DEFAULT_MAJOR_ROOT << 8 | DEFAULT_MINOR_ROOT) /* Minimal number of setup sectors */ #define SETUP_SECT_MIN 5 @@ -159,7 +161,7 @@ int main(int argc, char ** argv) die("read-error on `setup'"); if (c < 1024) die("The setup must be at least 1024 bytes"); - if (buf[510] != 0x55 || buf[511] != 0xaa) + if (get_unaligned_le16(&buf[510]) != 0xAA55) die("Boot block hasn't got boot flag (0xAA55)"); fclose(file); @@ -171,8 +173,7 @@ int main(int argc, char ** argv) memset(buf+c, 0, i-c); /* Set the default root device */ - buf[508] = DEFAULT_MINOR_ROOT; - buf[509] = DEFAULT_MAJOR_ROOT; + put_unaligned_le16(DEFAULT_ROOT_DEV, &buf[508]); fprintf(stderr, "Setup is %d bytes (padded to %d bytes).\n", c, i); @@ -192,44 +193,42 @@ int main(int argc, char ** argv) /* Patch the setup code with the appropriate size parameters */ buf[0x1f1] = setup_sectors-1; - buf[0x1f4] = sys_size; - buf[0x1f5] = sys_size >> 8; - buf[0x1f6] = sys_size >> 16; - buf[0x1f7] = sys_size >> 24; + put_unaligned_le32(sys_size, &buf[0x1f4]); #ifdef CONFIG_EFI_STUB file_sz = sz + i + ((sys_size * 16) - sz); - pe_header = *(unsigned int *)&buf[0x3c]; + pe_header = get_unaligned_le32(&buf[0x3c]); /* Size of code */ - *(unsigned int *)&buf[pe_header + 0x1c] = file_sz; + put_unaligned_le32(file_sz, &buf[pe_header + 0x1c]); /* Size of image */ - *(unsigned int *)&buf[pe_header + 0x50] = file_sz; + put_unaligned_le32(file_sz, &buf[pe_header + 0x50]); #ifdef CONFIG_X86_32 /* Address of entry point */ - *(unsigned int *)&buf[pe_header + 0x28] = i; + put_unaligned_le32(i, &buf[pe_header + 0x28]); /* .text size */ - *(unsigned int *)&buf[pe_header + 0xb0] = file_sz; + put_unaligned_le32(file_sz, &buf[pe_header + 0xb0]); /* .text size of initialised data */ - *(unsigned int *)&buf[pe_header + 0xb8] = file_sz; + put_unaligned_le32(file_sz, &buf[pe_header + 0xb8]); #else /* * Address of entry point. startup_32 is at the beginning and * the 64-bit entry point (startup_64) is always 512 bytes * after. */ - *(unsigned int *)&buf[pe_header + 0x28] = i + 512; + put_unaligned_le32(i + 512, &buf[pe_header + 0x28]); /* .text size */ - *(unsigned int *)&buf[pe_header + 0xc0] = file_sz; + put_unaligned_le32(file_sz, &buf[pe_header + 0xc0]); /* .text size of initialised data */ - *(unsigned int *)&buf[pe_header + 0xc8] = file_sz; + put_unaligned_le32(file_sz, &buf[pe_header + 0xc8]); + #endif /* CONFIG_X86_32 */ #endif /* CONFIG_EFI_STUB */ -- cgit v0.10.2 From 24fa9a9d6d70ef7ef7087dce472a8f43a9078da5 Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Tue, 28 Feb 2012 13:37:25 +0000 Subject: USB: ffs-test: Don't duplicate {get,put}_unaligned*() functions Use the header file in tools/include instead of duplicating the endian functions. Cc: Davidlohr Bueso Acked-by: Greg Kroah-Hartman Signed-off-by: Matt Fleming Link: http://lkml.kernel.org/r/1330436245-24875-7-git-send-email-matt@console-pimps.org Signed-off-by: H. Peter Anvin diff --git a/tools/usb/Makefile b/tools/usb/Makefile index 8b704af..396d6c4 100644 --- a/tools/usb/Makefile +++ b/tools/usb/Makefile @@ -3,7 +3,7 @@ CC = $(CROSS_COMPILE)gcc PTHREAD_LIBS = -lpthread WARNINGS = -Wall -Wextra -CFLAGS = $(WARNINGS) -g $(PTHREAD_LIBS) +CFLAGS = $(WARNINGS) -g $(PTHREAD_LIBS) -I../include all: testusb ffs-test %: %.c diff --git a/tools/usb/ffs-test.c b/tools/usb/ffs-test.c index b9c7986..384f47a 100644 --- a/tools/usb/ffs-test.c +++ b/tools/usb/ffs-test.c @@ -36,6 +36,7 @@ #include #include #include +#include #include "../../include/linux/usb/functionfs.h" @@ -47,34 +48,6 @@ #define le32_to_cpu(x) le32toh(x) #define le16_to_cpu(x) le16toh(x) -static inline __u16 get_unaligned_le16(const void *_ptr) -{ - const __u8 *ptr = _ptr; - return ptr[0] | (ptr[1] << 8); -} - -static inline __u32 get_unaligned_le32(const void *_ptr) -{ - const __u8 *ptr = _ptr; - return ptr[0] | (ptr[1] << 8) | (ptr[2] << 16) | (ptr[3] << 24); -} - -static inline void put_unaligned_le16(__u16 val, void *_ptr) -{ - __u8 *ptr = _ptr; - *ptr++ = val; - *ptr++ = val >> 8; -} - -static inline void put_unaligned_le32(__u32 val, void *_ptr) -{ - __u8 *ptr = _ptr; - *ptr++ = val; - *ptr++ = val >> 8; - *ptr++ = val >> 16; - *ptr++ = val >> 24; -} - /******************** Messages and Errors ***********************************/ -- cgit v0.10.2 From b8d43cb504a94f1070159a37c8cb23008276eff3 Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" Date: Tue, 28 Feb 2012 23:30:58 -0800 Subject: x86, tools: Remove unneeded header files from tools/build.c We include and , but none of those header files actually provide anything this file needs. Furthermore, it breaks cross-compilation, so just remove them. Reported-by: Stephen Rothwell Reported-by: Ingo Molnar Signed-off-by: H. Peter Anvin Cc: Matt Fleming Cc: Andrew Morton Cc: Nick Bowler Link: http://lkml.kernel.org/r/20120229111322.9eb4b23ff1672e8853ad3b3b@canb.auug.org.au diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c index f2ac95e..f3bd2e6 100644 --- a/arch/x86/boot/tools/build.c +++ b/arch/x86/boot/tools/build.c @@ -29,11 +29,9 @@ #include #include #include -#include #include #include #include -#include #include typedef unsigned char u8; -- cgit v0.10.2 From a51f4047758d2bcd099ea113b833ed380f4024ba Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" Date: Tue, 28 Feb 2012 23:36:21 -0800 Subject: x86, build: Fix portability issues when cross-building It would appear that we never actually generated a correct CRC when building on a bigendian machine. Depending on the word size, we would either generate an all-zero CRC (64-bit machine) or a byte-swapped CRC (32-bit machine.) Fix the types used so we don't arbitrarily use a 64-bit word to hold 32-bit numbers, and pass the CRC through put_unaligned_le32() like all the other numbers. Signed-off-by: H. Peter Anvin Cc: Stephen Rothwell Cc: Matt Fleming Cc: Andrew Morton Cc: Nick Bowler Link: http://lkml.kernel.org/r/20120229111322.9eb4b23ff1672e8853ad3b3b@canb.auug.org.au diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c index f3bd2e6..ed54976 100644 --- a/arch/x86/boot/tools/build.c +++ b/arch/x86/boot/tools/build.c @@ -36,7 +36,7 @@ typedef unsigned char u8; typedef unsigned short u16; -typedef unsigned long u32; +typedef unsigned int u32; #define DEFAULT_MAJOR_ROOT 0 #define DEFAULT_MINOR_ROOT 0 @@ -247,8 +247,9 @@ int main(int argc, char ** argv) } /* Write the CRC */ - fprintf(stderr, "CRC %lx\n", crc); - if (fwrite(&crc, 1, 4, stdout) != 4) + fprintf(stderr, "CRC %x\n", crc); + put_unaligned_le32(crc, buf); + if (fwrite(buf, 1, 4, stdout) != 4) die("Writing CRC failed"); close(fd); -- cgit v0.10.2