.text
.code 32
+@ Special note about using .byte directives to encode instructions.
+@ Initial reason for hand-coding instructions was to allow module to
+@ be compilable by legacy tool-chains. At later point it was pointed
+@ out that since ARMv7, instructions are always encoded in little-endian
+@ order, therefore one has to opt for endian-neutral presentation.
+@ Contemporary tool-chains offer .inst directive for this purpose,
+@ but not legacy ones. Therefore .byte. But there is an exception,
+@ namely ARMv7-R profile still allows for big-endian encoding even for
+@ instructions. This raises the question what if probe instructions
+@ appear executable to such processor operating in big-endian order?
+@ They have to be chosen in a way that avoids this problem. As failed
+@ NEON probe disables a number of other probes we have to ensure that
+@ only NEON probe instruction doesn't appear executable in big-endian
+@ order, therefore 'vorr q8,q8,q8', and not some other register. The
+@ only probe that is not bypassed on failed NEON probe is _armv7_tick,
+@ where you'll spot 'mov r0,r6' that serves this purpose. Basic idea is
+@ that if fetched in alternative byte oder instruction should crash to
+@ denote lack of probed capability...
+
.align 5
.global _armv7_neon_probe
.type _armv7_neon_probe,%function
_armv7_neon_probe:
- .word 0xf26ee1fe @ vorr q15,q15,q15
- .word 0xe12fff1e @ bx lr
+ .byte 0xf0,0x01,0x60,0xf2 @ vorr q8,q8,q8
+ .byte 0x1e,0xff,0x2f,0xe1 @ bx lr
.size _armv7_neon_probe,.-_armv7_neon_probe
.global _armv7_tick
.type _armv7_tick,%function
_armv7_tick:
- mrrc p15,1,r0,r1,c14 @ CNTVCT
- .word 0xe12fff1e @ bx lr
+ .byte 0x06,0x00,0xa0,0xe1 @ mov r0,r6
+ .byte 0x1e,0x0f,0x51,0xec @ mrrc p15,1,r0,r1,c14 @ CNTVCT
+ .byte 0x1e,0xff,0x2f,0xe1 @ bx lr
+ nop
.size _armv7_tick,.-_armv7_tick
.global _armv8_aes_probe
.type _armv8_aes_probe,%function
_armv8_aes_probe:
- .word 0xf3b00300 @ aese.8 q0,q0
- .word 0xe12fff1e @ bx lr
+ .byte 0x00,0x03,0xb0,0xf3 @ aese.8 q0,q0
+ .byte 0x1e,0xff,0x2f,0xe1 @ bx lr
.size _armv8_aes_probe,.-_armv8_aes_probe
.global _armv8_sha1_probe
.type _armv8_sha1_probe,%function
_armv8_sha1_probe:
- .word 0xf2000c40 @ sha1c.32 q0,q0,q0
- .word 0xe12fff1e @ bx lr
+ .byte 0x40,0x0c,0x00,0xf2 @ sha1c.32 q0,q0,q0
+ .byte 0x1e,0xff,0x2f,0xe1 @ bx lr
.size _armv8_sha1_probe,.-_armv8_sha1_probe
.global _armv8_sha256_probe
.type _armv8_sha256_probe,%function
_armv8_sha256_probe:
- .word 0xf3000c40 @ sha256h.32 q0,q0,q0
- .word 0xe12fff1e @ bx lr
+ .byte 0x40,0x0c,0x00,0xf3 @ sha256h.32 q0,q0,q0
+ .byte 0x1e,0xff,0x2f,0xe1 @ bx lr
.size _armv8_sha256_probe,.-_armv8_sha256_probe
.global _armv8_pmull_probe
.type _armv8_pmull_probe,%function
_armv8_pmull_probe:
- .word 0xf2a00e00 @ vmull.p64 q0,d0,d0
- .word 0xe12fff1e @ bx lr
+ .byte 0x00,0x0e,0xa0,0xf2 @ vmull.p64 q0,d0,d0
+ .byte 0x1e,0xff,0x2f,0xe1 @ bx lr
.size _armv8_pmull_probe,.-_armv8_pmull_probe
.align 5
cmp r2,#0
bne .Ladd
mov r0,r3
- .word 0xe12fff1e @ bx lr
+ bx lr
#else
stmdb sp!,{r4-r6,lr}
ldr r2,.Lspinlock
adds r1,r1,#4
bne .Little
.Lcleanse_done:
+#if __ARM_ARCH__>=5
+ bx lr
+#else
tst lr,#1
moveq pc,lr
.word 0xe12fff1e @ bx lr
+#endif
.size OPENSSL_cleanse,.-OPENSSL_cleanse
.global OPENSSL_wipe_cpu
eor ip,ip,ip
tst r0,#1
beq .Lwipe_done
- .word 0xf3000150 @ veor q0, q0, q0
- .word 0xf3022152 @ veor q1, q1, q1
- .word 0xf3044154 @ veor q2, q2, q2
- .word 0xf3066156 @ veor q3, q3, q3
- .word 0xf34001f0 @ veor q8, q8, q8
- .word 0xf34221f2 @ veor q9, q9, q9
- .word 0xf34441f4 @ veor q10, q10, q10
- .word 0xf34661f6 @ veor q11, q11, q11
- .word 0xf34881f8 @ veor q12, q12, q12
- .word 0xf34aa1fa @ veor q13, q13, q13
- .word 0xf34cc1fc @ veor q14, q14, q14
- .word 0xf34ee1fe @ veor q15, q15, q15
+ .byte 0x50,0x01,0x00,0xf3 @ veor q0, q0, q0
+ .byte 0x52,0x21,0x02,0xf3 @ veor q1, q1, q1
+ .byte 0x54,0x41,0x04,0xf3 @ veor q2, q2, q2
+ .byte 0x56,0x61,0x06,0xf3 @ veor q3, q3, q3
+ .byte 0xf0,0x01,0x40,0xf3 @ veor q8, q8, q8
+ .byte 0xf2,0x21,0x42,0xf3 @ veor q9, q9, q9
+ .byte 0xf4,0x41,0x44,0xf3 @ veor q10, q10, q10
+ .byte 0xf6,0x61,0x46,0xf3 @ veor q11, q11, q11
+ .byte 0xf8,0x81,0x48,0xf3 @ veor q12, q12, q12
+ .byte 0xfa,0xa1,0x4a,0xf3 @ veor q13, q13, q13
+ .byte 0xfc,0xc1,0x4c,0xf3 @ veor q14, q14, q14
+ .byte 0xfe,0xe1,0x4e,0xf3 @ veor q14, q14, q14
.Lwipe_done:
mov r0,sp
+#if __ARM_ARCH__>=5
+ bx lr
+#else
tst lr,#1
moveq pc,lr
.word 0xe12fff1e @ bx lr
+#endif
.size OPENSSL_wipe_cpu,.-OPENSSL_wipe_cpu
.global OPENSSL_instrument_bus
.type OPENSSL_instrument_bus,%function
OPENSSL_instrument_bus:
eor r0,r0,r0
+#if __ARM_ARCH__>=5
+ bx lr
+#else
tst lr,#1
moveq pc,lr
.word 0xe12fff1e @ bx lr
+#endif
.size OPENSSL_instrument_bus,.-OPENSSL_instrument_bus
.global OPENSSL_instrument_bus2
.type OPENSSL_instrument_bus2,%function
OPENSSL_instrument_bus2:
eor r0,r0,r0
+#if __ARM_ARCH__>=5
+ bx lr
+#else
tst lr,#1
moveq pc,lr
.word 0xe12fff1e @ bx lr
+#endif
.size OPENSSL_instrument_bus2,.-OPENSSL_instrument_bus2
.align 5
projects / oweals / openssl.git / blobdiff