projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| e2c0cdfb PD |
1 | # Copied from arch/tile/kernel/vdso/Makefile |
| 2 | ||
| 3 | # Symbols present in the vdso | |
| 28dfbe6e AW |
4 | vdso-syms = rt_sigreturn |
| 5 | vdso-syms += gettimeofday | |
| 6 | vdso-syms += clock_gettime | |
| 7 | vdso-syms += clock_getres | |
| 8 | vdso-syms += getcpu | |
| 921ebd8f | 9 | vdso-syms += flush_icache |
| e2c0cdfb PD |
10 | |
| 11 | # Files to link into the vdso | |
| 12 | obj-vdso = $(patsubst %, %.o, $(vdso-syms)) | |
| 13 | ||
| 14 | # Build rules | |
| 15 | targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.lds vdso-dummy.o | |
| 16 | obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) | |
| 17 | ||
| 18 | obj-y += vdso.o vdso-syms.o | |
| 19 | CPPFLAGS_vdso.lds += -P -C -U$(ARCH) | |
| 20 | ||
| 21 | # Disable gcov profiling for VDSO code | |
| 22 | GCOV_PROFILE := n | |
| 23 | ||
| 24 | # Force dependency | |
| 25 | $(obj)/vdso.o: $(obj)/vdso.so | |
| 26 | ||
| 27 | # link rule for the .so file, .lds has to be first | |
| 28 | SYSCFLAGS_vdso.so.dbg = $(c_flags) | |
| 29 | $(obj)/vdso.so.dbg: $(src)/vdso.lds $(obj-vdso) FORCE | |
| 30 | $(call if_changed,vdsold) | |
| 31 | ||
| 32 | # We also create a special relocatable object that should mirror the symbol | |
| 33 | # table and layout of the linked DSO. With ld -R we can then refer to | |
| 34 | # these symbols in the kernel code rather than hand-coded addresses. | |
| 35 | ||
| 36 | SYSCFLAGS_vdso.so.dbg = -shared -s -Wl,-soname=linux-vdso.so.1 \ | |
| 37 | $(call cc-ldoption, -Wl$(comma)--hash-style=both) | |
| 38 | $(obj)/vdso-dummy.o: $(src)/vdso.lds $(obj)/rt_sigreturn.o FORCE | |
| 39 | $(call if_changed,vdsold) | |
| 40 | ||
| 41 | LDFLAGS_vdso-syms.o := -r -R | |
| 42 | $(obj)/vdso-syms.o: $(obj)/vdso-dummy.o FORCE | |
| 43 | $(call if_changed,ld) | |
| 44 | ||
| 45 | # strip rule for the .so file | |
| 46 | $(obj)/%.so: OBJCOPYFLAGS := -S | |
| 47 | $(obj)/%.so: $(obj)/%.so.dbg FORCE | |
| 48 | $(call if_changed,objcopy) | |
| 49 | ||
| 50 | # actual build commands | |
| 51 | # The DSO images are built using a special linker script | |
| 52 | # Add -lgcc so rv32 gets static muldi3 and lshrdi3 definitions. | |
| 53 | # Make sure only to export the intended __vdso_xxx symbol offsets. | |
| 54 | quiet_cmd_vdsold = VDSOLD $@ | |
| 85602bea | 55 | cmd_vdsold = $(CC) $(KCFLAGS) $(call cc-option, -no-pie) -nostdlib $(SYSCFLAGS_$(@F)) \ |
| e2c0cdfb PD |
56 | -Wl,-T,$(filter-out FORCE,$^) -o $@.tmp -lgcc && \ |
| 57 | $(CROSS_COMPILE)objcopy \ | |
| 58 | $(patsubst %, -G __vdso_%, $(vdso-syms)) $@.tmp $@ | |
| 59 | ||
| 60 | # install commands for the unstripped file | |
| 61 | quiet_cmd_vdso_install = INSTALL $@ | |
| 62 | cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ | |
| 63 | ||
| 64 | vdso.so: $(obj)/vdso.so.dbg | |
| 65 | @mkdir -p $(MODLIB)/vdso | |
| 66 | $(call cmd,vdso_install) | |
| 67 | ||
| 68 | vdso_install: vdso.so |