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| H A D | arm.mk | a23860a812b3f671a869811e8a8dbeeced507618 Tue Nov 05 14:41:35 UTC 2019 Jerome Forissier <jerome@forissier.org> arm32: compile assembler code with -marm by default
When CFG_FTRACE_SUPPORT=y, thumb mode should not be used in TA code,
because the ftrace code assumes arm instructions. Therefore we have to
pass the -marm switch to the compiler and assembler. This is correctly
done for the C compiler but not for the assembler. The same applies to
assembler files in the TEE core when CFG_SYSCALL_FTRACE=y.
More generally and for simplicity, we will assume that all _a32.S files
should be compiled in arm mode and therefore add -marm to
arm32-platform-aflags. Any exception can be handled via file-specific
flags in sub.mk.
Fixes a crash in the setjmp()/longjmp() test of xtest 1006 when Linaro's
GCC 6.2 is used to build the user space libutils.a (more precisely:
lib/libutils/isoc/arch/arm/setjmp_a32.S):
E/TC:? 0 User TA prefetch-abort at address 0x0 (translation fault)
E/TC:? 0 fsr 0x00000005 ttbr0 0x0e19206a ttbr1 0x0e18806a cidr 0x2
E/TC:? 0 cpu #1 cpsr 0x60000110
E/TC:? 0 r0 0x00000000 r4 0x00115780 r8 0x00000000 r12 0x00115658
E/TC:? 0 r1 0x00000001 r5 0x0011fb8c r9 0x00000000 sp 0x001156a0
E/TC:? 0 r2 0x00000000 r6 0x60000110 r10 0x00000000 lr 0x00000000
E/TC:? 0 r3 0x00000000 r7 0x00000000 r11 0x001156bc pc 0x00000000
E/LD: Status of TA 5b9e0e40-2636-11e1-ad9e-0002a5d5c51b
E/LD: arch: arm
E/LD: region 0: va 0x00102000 pa 0x0e300000 size 0x002000 flags rw-s (ldelf)
E/LD: region 1: va 0x00104000 pa 0x0e302000 size 0x00a000 flags r-xs (ldelf)
E/LD: region 2: va 0x0010e000 pa 0x0e30c000 size 0x001000 flags rw-s (ldelf)
E/LD: region 3: va 0x0010f000 pa 0x0e30d000 size 0x003000 flags rw-s (ldelf)
E/LD: region 4: va 0x00112000 pa 0x0e310000 size 0x001000 flags r--s
E/LD: region 5: va 0x00113000 pa 0x0e444000 size 0x003000 flags rw-s (stack)
E/LD: region 6: va 0x0011b000 pa 0x00001000 size 0x024000 flags r-xs [0]
E/LD: region 7: va 0x0013f000 pa 0x00025000 size 0x10f000 flags rw-s [0]
E/LD: region 8: va 0x00266000 pa 0x00000000 size 0x003000 flags r-xs [1]
E/LD: region 9: va 0x00269000 pa 0x00002000 size 0x002000 flags rw-s [1]
E/LD: region 10: va 0x00300000 pa 0x40a67570 size 0x001000 flags rw-- (param)
E/LD: [0] 5b9e0e40-2636-11e1-ad9e-0002a5d5c51b @ 0x0011b000
E/LD: [1] ffd2bded-ab7d-4988-95ee-e4962fff7154 @ 0x00266000
E/LD: Call stack:
E/LD: 0x00000000
Note: the crash is due to the fact that the compiler was configured for
-mthumb by default, whereas Arm's GCC 8.3 for instance defaults to
-marm. The compiler switches can be checked with:
$ echo 'void f() {};' | \
arm-linux-gnueabihf-gcc -frecord-gcc-switches -xc -c - -o test
$ readelf -p .GCC.command.line test
Signed-off-by: Jerome Forissier <jerome@forissier.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
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