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