Attachment 1475892 Details for Bug 1615823 – not working path with unaligned memcpy (len = 68)

not working path with unaligned memcpy (len = 68)

tegra20-gdb-memcpy_vfp_non_aligned.txt (text/plain), 1.72 KB, created by Nicolas Chauvet (kwizart) on 2018-08-14 14:54:25 UTC

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Creator: Nicolas Chauvet (kwizart)

Created: 2018-08-14 14:54:25 UTC

Size: 1.72 KB

patch

obsolete

>Breakpoint 1, __memcpy_vfp () at ../sysdeps/arm/armv7/multiarch/memcpy_impl.S:269
>269		mov	dst, dstin	/* Preserve dstin, we need to return it.  */
>(gdb) 
>Continuing.
>
>Breakpoint 1, __memcpy_vfp () at ../sysdeps/arm/armv7/multiarch/memcpy_impl.S:269
>269		mov	dst, dstin	/* Preserve dstin, we need to return it.  */
>(gdb) bt
>#0  __memcpy_vfp () at ../sysdeps/arm/armv7/multiarch/memcpy_impl.S:269
>#1  0x00401ed8 in memcpy (__len=68, __src=<optimized out>, __dest=0x41849c) at /usr/include/bits/string_fortified.h:34
>#2  kms_screen_probe (screen=0x418480) at ../tests/kms/libkms-test-screen.c:45
>#3  kms_screen_create (device=device@entry=0x418150, id=94) at ../tests/kms/libkms-test-screen.c:63
>#4  0x00401600 in kms_device_probe_screens (device=0x418150) at ../tests/kms/libkms-test-device.c:73
>#5  kms_device_probe (device=0x418150) at ../tests/kms/libkms-test-device.c:156
>#6  kms_device_open (fd=<optimized out>) at ../tests/kms/libkms-test-device.c:171
>#7  0x0040102c in main (argc=<optimized out>, argv=0xbefff514) at ../tests/kms/kms-steal-crtc.c:74
>(gdb) nexti
>270		cmp	count, #64
>(gdb) nexti
>271		bge	.Lcpy_not_short
>(gdb) nexti
>321		str	tmp2, [sp, #-FRAME_SIZE]!
>(gdb) nexti
>325		and	tmp2, src, #7
>(gdb) nexti
>326		and	tmp1, dst, #7
>(gdb) nexti
>327		cmp	tmp1, tmp2
>(gdb) nexti
>328		bne	.Lcpy_notaligned
>(gdb) nexti
>598		pld	[src, #0]
>(gdb) nexti
>599		pld	[src, #64]
>(gdb) nexti
>603		lsls	tmp2, dst, #29
>(gdb) nexti
>604		pld	[src, #(2 * 64)]
>(gdb) nexti
>605		beq	1f
>(gdb) nexti
>606		rsbs	tmp2, tmp2, #0
>(gdb) nexti
>607		sub	count, count, tmp2, lsr #29
>(gdb) nexti
>608		ldrmi	tmp1, [src], #4
>(gdb) nexti
>
>Program received signal SIGSEGV, Segmentation fault.
>__memcpy_vfp () at ../sysdeps/arm/armv7/multiarch/memcpy_impl.S:608
>608		ldrmi	tmp1, [src], #4

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