Вот что говорит на -target-help , может нужно еще добавить какие опции?, камень at91sam7x. в скрипте стек выровнен aling(8).
The following options are target specific:
-mabi= Specify an ABI
-mabort-on-noreturn Generate a call to abort if a noreturn function
returns
-mapcs-float Pass FP arguments in FP registers
-mapcs-frame Generate APCS conformant stack frames
-mapcs-reentrant Generate re-entrant, PIC code
-march= Specify the name of the target architecture
-mbig-endian Assume target CPU is configured as big endian
-mcallee-super-interworking Thumb: Assume non-static functions may be called
from ARM code
-mcaller-super-interworking Thumb: Assume function pointers may go to non-
Thumb aware code
-mcirrus-fix-invalid-insns Cirrus: Place NOPs to avoid invalid instruction
combinations
-mcpu= Specify the name of the target CPU
-mfix-cortex-m3-ldrd Avoid overlapping destination and address
registers on LDRD instructions that may trigger
Cortex-M3 errata.
-mfloat-abi= Specify if floating point hardware should be used
-mfpu= Specify the name of the target floating point
hardware/format
-mhard-float Alias for -mfloat-abi=hard
-mlittle-endian Assume target CPU is configured as little endian
-mlong-calls Generate call insns as indirect calls, if
necessary
-mpic-register= Specify the register to be used for PIC addressing
-mpoke-function-name Store function names in object code
-msched-prolog Permit scheduling of a function's prologue
sequence
-msingle-pic-base Do not load the PIC register in function prologues
-msoft-float Alias for -mfloat-abi=soft
-mstructure-size-boundary= Specify the minimum bit alignment of structures
-mthumb Compile for the Thumb not the ARM
-mthumb-interwork Support calls between Thumb and ARM instruction
sets
-mtp= Specify how to access the thread pointer
-mtpcs-frame Thumb: Generate (non-leaf) stack frames even if
not needed
-mtpcs-leaf-frame Thumb: Generate (leaf) stack frames even if not
needed
-mtune= Tune code for the given processor
-mvectorize-with-neon-quad Use Neon quad-word (rather than double-word)
registers for vectorization
-mword-relocations Only generate absolute relocations on word sized
values.
-mwords-little-endian Assume big endian bytes, little endian words
Known ARM CPUs (for use with the -mcpu= and -mtune= options):
cortex-m1, cortex-m3, cortex-r4f, cortex-r4, cortex-a9, cortex-a8,
arm1156t2-s, mpcore, mpcorenovfp, arm1176jzf-s, arm1176jz-s, arm1136jf-s,
arm1136j-s, arm1026ej-s, arm926ej-s, iwmmxt2, iwmmxt, xscale, arm1022e,
arm1020e, arm10e, arm968e-s, arm966e-s, arm946e-s, arm9e, arm1020t,
arm10tdmi, ep9312, arm940t, arm922t, arm920t, arm920, arm9tdmi, arm9,
arm740t, arm720t, arm710t, arm7tdmi-s, arm7tdmi, strongarm1110,
strongarm1100, strongarm110, strongarm, arm810, arm8, arm7dmi, arm7dm,
arm7m, arm7500fe, arm7500, arm7100, arm710c, arm720, arm710, arm700i,
arm700, arm70, arm7di, arm7d, arm7, arm620, arm610, arm600, arm60, arm6,
arm3, arm250, arm2
Known ARM architectures (for use with the -march= option):
iwmmxt2, iwmmxt, ep9312, armv7-m, armv7-r, armv7-a, armv7, armv6-m, armv6t2,
armv6zk, armv6z, armv6k, armv6j, armv6, armv5te, armv5e, armv5t, armv5,
armv4t, armv4, armv3m, armv3, armv2a, armv2
ARM-specific assembler options:
-k generate PIC code
-mthumb assemble Thumb code
-mthumb-interwork support ARM/Thumb interworking
-mapcs-32 code uses 32-bit program counter
-mapcs-26 code uses 26-bit program counter
-mapcs-float floating point args are in fp regs
-mapcs-reentrant re-entrant code
-matpcs code is ATPCS conformant
-mbig-endian assemble for big-endian
-mlittle-endian assemble for little-endian
-mapcs-frame use frame pointer
-mapcs-stack-check use stack size checking
-mno-warn-deprecated do not warn on use of deprecated feature
-mcpu=<cpu name> assemble for CPU <cpu name>
-march=<arch name> assemble for architecture <arch name>
-mfpu=<fpu name> assemble for FPU architecture <fpu name>
-mfloat-abi=<abi> assemble for floating point ABI <abi>
-meabi=<ver> assemble for eabi version <ver>
-mimplicit-it=<mode> controls implicit insertion of IT instructions
-EB assemble code for a big-endian cpu
-EL assemble code for a little-endian cpu
--fix-v4bx Allow BX in ARMv4 code
Linker options
==============
Use "-Wl,OPTION" to pass "OPTION" to the linker.
armelf:
--build-id[=STYLE] Generate build ID note
-Bgroup Selects group name lookup rules for DSO
--disable-new-dtags Disable new dynamic tags
--enable-new-dtags Enable new dynamic tags
--eh-frame-hdr Create .eh_frame_hdr section
--hash-style=STYLE Set hash style to sysv, gnu or both
-z combreloc Merge dynamic relocs into one section and sort
-z defs Report unresolved symbols in object files.
-z execstack Mark executable as requiring executable stack
-z initfirst Mark DSO to be initialized first at runtime
-z interpose Mark object to interpose all DSOs but executable
-z lazy Mark object lazy runtime binding (default)
-z loadfltr Mark object requiring immediate process
-z muldefs Allow multiple definitions
-z nocombreloc Don't merge dynamic relocs into one section
-z nocopyreloc Don't create copy relocs
-z nodefaultlib Mark object not to use default search paths
-z nodelete Mark DSO non-deletable at runtime
-z nodlopen Mark DSO not available to dlopen
-z nodump Mark DSO not available to dldump
-z noexecstack Mark executable as not requiring executable stack
-z now Mark object non-lazy runtime binding
-z origin Mark object requiring immediate $ORIGIN
processing at runtime
-z max-page-size=SIZE Set maximum page size to SIZE
-z common-page-size=SIZE Set common page size to SIZE
-z KEYWORD Ignored for Solaris compatibility
--thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>
--be8 Output BE8 format image
--target1=rel Interpret R_ARM_TARGET1 as R_ARM_REL32
--target1=abs Interpret R_ARM_TARGET1 as R_ARM_ABS32
--target2=<type> Specify definition of R_ARM_TARGET2
--fix-v4bx Rewrite BX rn as MOV pc, rn for ARMv4
--fix-v4bx-interworking Rewrite BX rn branch to ARMv4 interworking veneer
--use-blx Enable use of BLX instructions
--vfp11-denorm-fix Specify how to fix VFP11 denorm erratum
--no-enum-size-warning Don't warn about objects with incompatible
enum sizes
--no-wchar-size-warning Don't warn about objects with incompatible
wchar_t sizes
--pic-veneer Always generate PIC interworking veneers
--stub-group-size=N Maximum size of a group of input sections that can be
handled by one stub section. A negative value
locates all stubs after their branches (with a
group size of -N), while a positive value allows
two groups of input sections, one before, and one
after each stub section. Values of +/-1 indicate
the linker should choose suitable defaults.
--[no-]fix-cortex-a8 Disable/enable Cortex-A8 Thumb-2 branch erratum fi
x
С такими параметрами собираю: все собирается без ошибок и предупреждений, работает, пока в sprintf(buf"%f" fldat); %f , после этого устройство запускается как доходит до
этой функции,зависает. Свою сделать мне такая универсальная как библиотечная не нужна, где бы посмотреть какой там алгоритм, что бы не изобретать велосипед.
ASFLAGS = $(MCFLAGS) -Wa,-amhls=$(<:.s=.lst) $(ADEFS)
CPFLAGS = $(MCFLAGS) $(OPT) -mthumb-interwork -mlong-calls -ffunction-sections -DNDEBUG -Wall -fverbose-asm -Wa,-ahlms=$(<:.c=.lst) $(DEFS)
LDFLAGS_RAM = $(MCFLAGS) -nostartfiles -T$(LDSCRIPT_RAM) -Wl,-Map=$(PROJECT)_ram.map,--cref,--no-warn-mismatch $(LIBDIR)
LDFLAGS_ROM = $(MCFLAGS) -nostartfiles -T$(LDSCRIPT_ROM) -Wl,-Map=$(PROJECT)_rom.map,--cref,--no-warn-mismatch $(LIBDIR)
# -g -gdwarf-2
# Generate dependency information
CPFLAGS += -MD -MP -MF .dep/$(@F).d
sprintf
Apr 15 2010, 17:37
