[PATCH 11/17] MIPS: Makefile: sign-extend TEXT_BASE value on CONFIG_64BIT

Denis Orlov denorl2009 at gmail.com
Mon Jun 5 13:10:42 PDT 2023

The code that uses TEXT_BASE will fail on reading truncated 32-bit
address if running with 64BIT enabled. As we only support running from
compatibility segments (i.e. no 'proper' 64-bit base addresses), simply
make sure the value is sign-extended when passing it as a define.

Signed-off-by: Denis Orlov <denorl2009 at gmail.com>
 arch/mips/Makefile | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index bad6e574c4..65a00379ab 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -57,7 +57,13 @@ cflags-$(CONFIG_CPU_MIPS64_R1) += $(call cc-option,-march=mips64,-mips64 -U_MIPS
 cflags-$(CONFIG_CPU_MIPS64_R2) += $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) -Wa,-mips64r2 -Wa,--trap
 cflags-$(CONFIG_CPU_GS232)     += $(call cc-option,-march=mips32r2,-mips32r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS32) -Wa,-mips32r2 -Wa,--trap
+ifdef CONFIG_64BIT
+MIPS_TEXT_BASE = $(subst 0x,0xffffffff,$(CONFIG_TEXT_BASE))
 # Add cleanup flags

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