| Message ID | 20210223023754.3123898-1-vgupta@synopsys.com |
|---|---|
| State | New |
| Headers | show |
| Series | ARC: Enable automatic support for newer ARC ISA variants (ARCv3) | expand |
On Mon, Feb 22, 2021 at 06:37:54PM -0800, Vineet Gupta wrote: > The syscall TRAP instruction used to be 4 bytes on legacy ARCompact > based ARC700 cores. Since then ARCv2 (circa 2014) and the upcoming ARCv3 > use the same 2-byte TRAP_S instruction. > > To ease porting of software to new ISA, special case ARC700. > > This is the only change needed to get strace working on 64-bit ARCv3 > cores (kudos to strace for making porting so easy) > > Signed-off-by: Vineet Gupta <vgupta@synopsys.com> > --- > src/linux/arc/raw_syscall.h | 4 +--- > 1 file changed, 1 insertion(+), 3 deletions(-) > > diff --git a/src/linux/arc/raw_syscall.h b/src/linux/arc/raw_syscall.h > index 6e60a6112b31..f54fe06f33df 100644 > --- a/src/linux/arc/raw_syscall.h > +++ b/src/linux/arc/raw_syscall.h > @@ -21,10 +21,8 @@ raw_syscall_0(const kernel_ulong_t nr, kernel_ulong_t *err) > > # ifdef __A7__ > # define ARC_TRAP_INSN "trap0" > -# elif defined __HS__ > -# define ARC_TRAP_INSN "trap_s 0 " > # else > -# error unrecognized arc > +# define ARC_TRAP_INSN "trap_s 0 " > # endif > > __asm__ __volatile__(ARC_TRAP_INSN Applied, thanks.
diff --git a/src/linux/arc/raw_syscall.h b/src/linux/arc/raw_syscall.h index 6e60a6112b31..f54fe06f33df 100644 --- a/src/linux/arc/raw_syscall.h +++ b/src/linux/arc/raw_syscall.h @@ -21,10 +21,8 @@ raw_syscall_0(const kernel_ulong_t nr, kernel_ulong_t *err) # ifdef __A7__ # define ARC_TRAP_INSN "trap0" -# elif defined __HS__ -# define ARC_TRAP_INSN "trap_s 0 " # else -# error unrecognized arc +# define ARC_TRAP_INSN "trap_s 0 " # endif __asm__ __volatile__(ARC_TRAP_INSN
The syscall TRAP instruction used to be 4 bytes on legacy ARCompact based ARC700 cores. Since then ARCv2 (circa 2014) and the upcoming ARCv3 use the same 2-byte TRAP_S instruction. To ease porting of software to new ISA, special case ARC700. This is the only change needed to get strace working on 64-bit ARCv3 cores (kudos to strace for making porting so easy) Signed-off-by: Vineet Gupta <vgupta@synopsys.com> --- src/linux/arc/raw_syscall.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)