On 1/13/24 10:37, Vineet Gupta wrote:
On 1/12/24 13:35, Richard Henderson wrote:
On 1/12/24 08:49, Vineet Gupta wrote:
Hi Richard, Alistair
On 10/30/23 14:17, Richard Henderson wrote:
diff --git a/linux-user/riscv/Makefile.vdso b/linux-user/riscv/Makefile.vdso
new file mode 100644
index 0000000000..2c257dbfda
--- /dev/null
+++ b/linux-user/riscv/Makefile.vdso
@@ -0,0 +1,15 @@
+include $(BUILD_DIR)/tests/tcg/riscv64-linux-user/config-target.mak
+
+SUBDIR = $(SRC_PATH)/linux-user/riscv
+VPATH += $(SUBDIR)
+
+all: $(SUBDIR)/vdso-32.so $(SUBDIR)/vdso-64.so
+
+LDFLAGS = -nostdlib -shared -fpic -Wl,-h,linux-vdso.so.1 -Wl,--build-id=sha1 \
+ -Wl,--hash-style=both -Wl,-T,$(SUBDIR)/vdso.ld
+
+$(SUBDIR)/vdso-32.so: vdso.S vdso.ld vdso-asmoffset.h
+ $(CC) -o $@ $(LDFLAGS) -mabi=ilp32d -march=rv32g $<
+
+$(SUBDIR)/vdso-64.so: vdso.S vdso.ld vdso-asmoffset.h
+ $(CC) -o $@ $(LDFLAGS) -mabi=lp64d -march=rv64g $<
So by default qemu ships the vdso binary. How can one rebuild it ?
From skimming the build files it seems following ought to do it
make update-linux-vdso
with a prior configure cmd like below with PATH pointing to the cross
compiler.
../configure --target-list=riscv64-linux-user
--cross-cc-riscv64=riscv64-unknown-linux-gnu-gcc
Yes, that should do it.
But it doesn't, I'm sure we are missing something basis here.
Do you get an error message?
Did $(BUILD_DIR)/tests/tcg/riscv64-linux-user/config-target.mak get created
properly?
It was indeed, but invoking make wasn't doing anything.
Odd. It Just Works here...
What do you have in the "Cross compilers" section of the configure output?
I would expect '--cross-prefix-riscv64=...' to be a better option that just gcc. And if
you have it installed as "riscv64-linux-gnu-", I would not expect you to need to provide
any configure option at all -- it should be auto-detected.
