sysdeps/i386/Makefile

   1 # The mpn functions need a #define for asm syntax flavor.
   2 # Every i386 port in use uses gas syntax (I think).
   3 asm-CPPFLAGS += -DGAS_SYNTAX
   4
   5 # The i386 `long double' is a distinct type we support.
   6 long-double-fcts = yes
   7
   8 ifeq ($(subdir),string)
   9 sysdep_routines += cacheinfo
  10 endif
  11
  12 ifeq ($(subdir),gmon)
  13 sysdep_routines += i386-mcount
  14 endif
  15
  16 ifeq ($(subdir),elf)
  17 CFLAGS-rtld.c += -Wno-uninitialized -Wno-unused
  18 CFLAGS-dl-load.c += -Wno-unused
  19 CFLAGS-dl-reloc.c += -Wno-unused
  20 endif
  21
  22 ifeq ($(subdir),debug)
  23 CFLAGS-backtrace.c += -fexceptions
  24 endif
  25
  26 # Most of the glibc routines don't ever call user defined callbacks
  27 # nor use any FPU or SSE* and as such don't need bigger %esp alignment
  28 # than 4 bytes.
  29 # Lots of routines in math will use FPU, so make math subdir an exception
  30 # here.
  31 # In gcc 4.6 (and maybe earlier?) giving -mpreferred-stack-boundary=2 is
  32 # an error, so don't try to reduce it here like we used to.  We still
  33 # explicit set -mpreferred-stack-boundary=4 the places where it matters,
  34 # in case an older compiler defaulted to 2.
  35 ifeq ($(subdir),math)
  36 sysdep-CFLAGS += -mpreferred-stack-boundary=4
  37 else
  38 ifeq ($(subdir),csu)
  39 sysdep-CFLAGS += -mpreferred-stack-boundary=4
  40 gen-as-const-headers += link-defines.sym
  41 else
  42 # Likewise, any function which calls user callbacks
  43 uses-callbacks += -mpreferred-stack-boundary=4
  44 # Likewise, any stack alignment tests
  45 stack-align-test-flags += -malign-double -mpreferred-stack-boundary=4
  46 endif
  47 endif
  48
  49 # And a couple of other routines
  50 ifeq ($(subdir),stdlib)
  51 CFLAGS-exit.c += -mpreferred-stack-boundary=4
  52 CFLAGS-cxa_finalize.c += -mpreferred-stack-boundary=4
  53 endif
  54 ifeq ($(subdir),elf)
  55 CFLAGS-dl-init.c += -mpreferred-stack-boundary=4
  56 CFLAGS-dl-fini.c += -mpreferred-stack-boundary=4
  57 CFLAGS-dl-open.c += -mpreferred-stack-boundary=4
  58 CFLAGS-dl-close.c += -mpreferred-stack-boundary=4
  59 CFLAGS-dl-error.c += -mpreferred-stack-boundary=4
  60 endif
  61 ifeq ($(subdir),dlfcn)
  62 CFLAGS-dlopen.c += -mpreferred-stack-boundary=4
  63 CFLAGS-dlopenold.c += -mpreferred-stack-boundary=4
  64 CFLAGS-dlclose.c += -mpreferred-stack-boundary=4
  65 CFLAGS-dlerror.c += -mpreferred-stack-boundary=4
  66 endif
  67
  68 ifneq (,$(filter -mno-tls-direct-seg-refs,$(CFLAGS)))
  69 defines += -DNO_TLS_DIRECT_SEG_REFS
  70 endif
  71
  72 ifeq ($(subdir),elf)
  73 sysdep-dl-routines += tlsdesc dl-tlsdesc
  74
  75 tests += tst-audit3
  76 modules-names += tst-auditmod3a tst-auditmod3b
  77
  78 $(objpfx)tst-audit3: $(objpfx)tst-auditmod3a.so
  79 $(objpfx)tst-audit3.out: $(objpfx)tst-auditmod3b.so
  80 tst-audit3-ENV = LD_AUDIT=$(objpfx)tst-auditmod3b.so
  81 endif
  82
  83 ifeq ($(subdir),csu)
  84 gen-as-const-headers += tlsdesc.sym
  85 endif
  86
  87 # Make sure no code in ld.so uses mm/xmm/ymm/zmm registers on i386 since
  88 # the first 3 mm/xmm/ymm/zmm registers are used to pass vector parameters
  89 # which must be preserved.
  90 # With SSE disabled, ensure -fpmath is not set to use sse either.
  91 rtld-CFLAGS += -mno-sse -mno-mmx -mfpmath=387
  92 ifeq ($(subdir),elf)
  93 CFLAGS-.os += $(if $(filter $(@F),$(patsubst %,%.os,$(all-rtld-routines))),\
  94                    $(rtld-CFLAGS))
  95
  96 tests-special += $(objpfx)tst-ld-sse-use.out
  97 $(objpfx)tst-ld-sse-use.out: ../sysdeps/i386/tst-ld-sse-use.sh $(objpfx)ld.so
  98         @echo "Checking ld.so for SSE register use.  This will take a few seconds..."
  99         $(BASH) $< $(objpfx) '$(NM)' '$(OBJDUMP)' '$(READELF)' > $@; \
 100         $(evaluate-test)
 101 else
 102 CFLAGS-.os += $(if $(filter rtld-%.os,$(@F)), $(rtld-CFLAGS))
 103 endif