Index: head/sys/boot/arm/uboot/Makefile =================================================================== --- head/sys/boot/arm/uboot/Makefile (revision 282730) +++ head/sys/boot/arm/uboot/Makefile (revision 282731) @@ -1,150 +1,158 @@ # $FreeBSD$ .include -PROG= ubldr +FILES= ubldr ubldr.bin + NEWVERSWHAT= "U-Boot loader" ${MACHINE_ARCH} BINDIR?= /boot INSTALLFLAGS= -b WARNS?= 1 # Address at which ubldr will be loaded. # This varies for different boards and SOCs. UBLDR_LOADADDR?= 0x1000000 # Architecture-specific loader code -SRCS= start.S conf.c vers.c +SRCS= start.S conf.c self_reloc.c vers.c .if !defined(LOADER_NO_DISK_SUPPORT) LOADER_DISK_SUPPORT?= yes .else LOADER_DISK_SUPPORT= no .endif LOADER_UFS_SUPPORT?= yes LOADER_CD9660_SUPPORT?= no LOADER_EXT2FS_SUPPORT?= no .if ${MK_NAND} != "no" LOADER_NANDFS_SUPPORT?= yes .else LOADER_NANDFS_SUPPORT?= no .endif LOADER_NET_SUPPORT?= yes LOADER_NFS_SUPPORT?= yes LOADER_TFTP_SUPPORT?= no LOADER_GZIP_SUPPORT?= no LOADER_BZIP2_SUPPORT?= no .if ${MK_FDT} != "no" LOADER_FDT_SUPPORT= yes .else LOADER_FDT_SUPPORT= no .endif .if ${LOADER_DISK_SUPPORT} == "yes" CFLAGS+= -DLOADER_DISK_SUPPORT .endif .if ${LOADER_UFS_SUPPORT} == "yes" CFLAGS+= -DLOADER_UFS_SUPPORT .endif .if ${LOADER_CD9660_SUPPORT} == "yes" CFLAGS+= -DLOADER_CD9660_SUPPORT .endif .if ${LOADER_EXT2FS_SUPPORT} == "yes" CFLAGS+= -DLOADER_EXT2FS_SUPPORT .endif .if ${LOADER_NANDFS_SUPPORT} == "yes" CFLAGS+= -DLOADER_NANDFS_SUPPORT .endif .if ${LOADER_GZIP_SUPPORT} == "yes" CFLAGS+= -DLOADER_GZIP_SUPPORT .endif .if ${LOADER_BZIP2_SUPPORT} == "yes" CFLAGS+= -DLOADER_BZIP2_SUPPORT .endif .if ${LOADER_NET_SUPPORT} == "yes" CFLAGS+= -DLOADER_NET_SUPPORT .endif .if ${LOADER_NFS_SUPPORT} == "yes" CFLAGS+= -DLOADER_NFS_SUPPORT .endif .if ${LOADER_TFTP_SUPPORT} == "yes" CFLAGS+= -DLOADER_TFTP_SUPPORT .endif .if ${LOADER_FDT_SUPPORT} == "yes" CFLAGS+= -I${.CURDIR}/../../fdt CFLAGS+= -I${.OBJDIR}/../../fdt CFLAGS+= -DLOADER_FDT_SUPPORT LIBUBOOT_FDT= ${.OBJDIR}/../../uboot/fdt/libuboot_fdt.a LIBFDT= ${.OBJDIR}/../../fdt/libfdt.a .endif .if ${MK_FORTH} != "no" # Enable BootForth BOOT_FORTH= yes CFLAGS+= -DBOOT_FORTH -I${.CURDIR}/../../ficl -I${.CURDIR}/../../ficl/arm LIBFICL= ${.OBJDIR}/../../ficl/libficl.a .endif # Always add MI sources .PATH: ${.CURDIR}/../../common .include "${.CURDIR}/../../common/Makefile.inc" CFLAGS+= -I${.CURDIR}/../../common CFLAGS+= -I. CLEANFILES+= vers.c loader.help CFLAGS+= -ffreestanding -msoft-float -LDFLAGS= -nostdlib -static -LDFLAGS+= -T ldscript.generated -LDFLAGS+= -T ${.CURDIR}/ldscript.${MACHINE_CPUARCH} +LDFLAGS= -nostdlib -static -T ${.CURDIR}/ldscript.${MACHINE_CPUARCH} # Pull in common loader code .PATH: ${.CURDIR}/../../uboot/common .include "${.CURDIR}/../../uboot/common/Makefile.inc" CFLAGS+= -I${.CURDIR}/../../uboot/common # U-Boot standalone support library LIBUBOOT= ${.OBJDIR}/../../uboot/lib/libuboot.a CFLAGS+= -I${.CURDIR}/../../uboot/lib CFLAGS+= -I${.OBJDIR}/../../uboot/lib # where to get libstand from CFLAGS+= -I${.CURDIR}/../../../../lib/libstand/ # clang doesn't understand %D as a specifier to printf NO_WERROR.clang= DPADD= ${LIBFICL} ${LIBUBOOT} ${LIBFDT} ${LIBUBOOT_FDT} ${LIBSTAND} LDADD= ${LIBFICL} ${LIBUBOOT} ${LIBFDT} ${LIBUBOOT_FDT} -lstand +OBJS+= ${SRCS:N*.h:R:S/$/.o/g} + vers.c: ${.CURDIR}/../../common/newvers.sh ${.CURDIR}/version sh ${.CURDIR}/../../common/newvers.sh ${.CURDIR}/version ${NEWVERSWHAT} loader.help: help.common help.uboot ${.CURDIR}/../../fdt/help.fdt cat ${.ALLSRC} | \ awk -f ${.CURDIR}/../../common/merge_help.awk > ${.TARGET} -${PROG}: ldscript.generated ${.CURDIR}/ldscript.${MACHINE_CPUARCH} +ldscript.abs: + echo "UBLDR_LOADADDR = ${UBLDR_LOADADDR};" >${.TARGET} -ldscript.generated:: - rm -f ldscript.generated.tmp - echo "UBLDR_LOADADDR = ${UBLDR_LOADADDR};" >ldscript.generated.tmp - if diff ldscript.generated ldscript.generated.tmp > /dev/null; then \ - true; \ - else \ - rm -f ldscript.generated; \ - mv ldscript.generated.tmp ldscript.generated; \ - fi +ldscript.pie: + echo "UBLDR_LOADADDR = 0;" >${.TARGET} + +ubldr: ${OBJS} ldscript.abs ${.CURDIR}/ldscript.${MACHINE_CPUARCH} + ${CC} ${CFLAGS} -T ldscript.abs ${LDFLAGS} \ + -o ${.TARGET} ${OBJS} ${LDADD} + +ubldr.pie: ${OBJS} ldscript.pie ${.CURDIR}/ldscript.${MACHINE_CPUARCH} + ${CC} ${CFLAGS} -T ldscript.pie ${LDFLAGS} -pie -Wl,-Bsymbolic \ + -o ${.TARGET} ${OBJS} ${LDADD} + +ubldr.bin: ubldr.pie + ${OBJCOPY} -S -O binary ubldr.pie ${.TARGET} + +CLEANFILES+= ldscript.abs ldscript.pie ubldr ubldr.pie ubldr.bin .if !defined(LOADER_ONLY) .PATH: ${.CURDIR}/../../forth .include "${.CURDIR}/../../forth/Makefile.inc" # Put sample loader.rc and menu.rc on disk but don't enable them # by default. FILES+= loader.rc FILESNAME_loader.rc= loader.rc.sample FILES+= menu.rc FILESNAME_menu.rc= menu.rc.sample .endif .include Index: head/sys/boot/arm/uboot/start.S =================================================================== --- head/sys/boot/arm/uboot/start.S (revision 282730) +++ head/sys/boot/arm/uboot/start.S (revision 282731) @@ -1,100 +1,130 @@ /*- * Copyright (c) 2008 Semihalf, Rafal Czubak * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #include #include + .text + .extern _C_LABEL(self_reloc), _C_LABEL(main) + .weak _DYNAMIC + /* * Entry point to the loader that U-Boot passes control to. */ - .text .globl _start _start: + +#ifdef _ARM_ARCH_6 + mrc p15, 0, ip, c1, c0, 0 + orr ip, ip, #(CPU_CONTROL_UNAL_ENABLE) + orr ip, ip, #(CPU_CONTROL_AFLT_ENABLE) + mcr p15, 0, ip, c1, c0, 0 +#endif + /* + * Do self-relocation when the weak external symbol _DYNAMIC is non-NULL. + * When linked as a dynamic relocatable file, the linker automatically + * defines _DYNAMIC with a value that is the offset of the dynamic + * relocation info section. + * Note that we're still on u-boot's stack here, but the self_reloc + * code uses only a couple dozen bytes of stack space. + */ + adr ip, .here_off /* .here_off is a symbol whose value */ + ldr r0, [ip] /* is its own offset in the text seg. */ + sub r0, ip, r0 /* Get its pc-relative address and */ + ldr r1, .dynamic_off /* subtract its value and we get */ + teq r1, #0 /* r0 = physaddr we were loaded at. */ + addne r1, r1, r0 /* r1 = dynamic section physaddr. */ + blne _C_LABEL(self_reloc) /* Do reloc if _DYNAMIC is non-NULL. */ + /* Hint where to look for the API signature */ ldr ip, =uboot_address str sp, [ip] /* Save U-Boot's r8 and r9 */ ldr ip, =saved_regs str r8, [ip, #0] str r9, [ip, #4] -#ifdef _ARM_ARCH_6 - mrc p15, 0, r2, c1, c0, 0 - orr r2, r2, #(CPU_CONTROL_UNAL_ENABLE) - orr r2, r2, #(CPU_CONTROL_AFLT_ENABLE) - mcr p15, 0, r2, c1, c0, 0 -#endif - - /* Start loader */ + /* + * Start loader. This is basically a tail-recursion call; if main() + * returns, it returns to u-boot (which reports the value returned r0). + */ b main + + /* + * Data for self-relocation, in the text segment for pc-rel access. + */ +.here_off: + .word . +.dynamic_off: + .word _DYNAMIC /* * syscall() */ ENTRY(syscall) /* Save caller's lr, r8 and r9 */ ldr ip, =saved_regs str r8, [ip, #8] str r9, [ip, #12] str lr, [ip, #16] /* Restore U-Boot's r8 and r9 */ ldr r8, [ip, #0] ldr r9, [ip, #4] /* Call into U-Boot */ ldr lr, =return_from_syscall ldr ip, =syscall_ptr ldr pc, [ip] return_from_syscall: /* Restore loader's r8, r9 and lr */ ldr ip, =saved_regs ldr lr, [ip, #16] ldr r9, [ip, #12] ldr r8, [ip, #8] /* Return to caller */ mov pc, lr /* * Data section */ .data .align 4 .globl syscall_ptr syscall_ptr: .long 0 .globl uboot_address uboot_address: .long 0 saved_regs: .long 0 /* U-Boot's r8 */ .long 0 /* U-Boot's r9 */ .long 0 /* Loader's r8 */ .long 0 /* Loader's r9 */ .long 0 /* Loader's lr */