kselftest/arm64: Install signal handlers before output in FP stress tests

To interface more robustly with other processes install the signal handers
in the floating point stress tests before we produce any output, this
means that a parent process can know that if it has seen any output from
the test then the test is ready to handle incoming signals.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220906220056.820295-1-broonie@kernel.orgSigned-off-by: Catalin Marinas <catalin.marinas@arm.com>

tools/testing/selftests/arm64/fp/fpsimd-test.S

@@ -216,6 +216,30 @@ endfunction
 .globl _start
 function _start
 _start:
+	mov	x23, #0		// signal count
+
+	mov	w0, #SIGINT
+	adr	x1, terminate_handler
+	mov	w2, #SA_SIGINFO
+	bl	setsignal
+
+	mov	w0, #SIGTERM
+	adr	x1, terminate_handler
+	mov	w2, #SA_SIGINFO
+	bl	setsignal
+
+	mov	w0, #SIGUSR1
+	adr	x1, irritator_handler
+	mov	w2, #SA_SIGINFO
+	orr	w2, w2, #SA_NODEFER
+	bl	setsignal
+
+	mov	w0, #SIGUSR2
+	adr	x1, tickle_handler
+	mov	w2, #SA_SIGINFO
+	orr	w2, w2, #SA_NODEFER
+	bl	setsignal
+
 	// Sanity-check and report the vector length
 
 	mov	x19, #128
@@ -246,30 +270,6 @@ _start:
 	mov	x0, x20
 	bl	putdecn
 
-	mov	x23, #0		// Irritation signal count
-
-	mov	w0, #SIGINT
-	adr	x1, terminate_handler
-	mov	w2, #SA_SIGINFO
-	bl	setsignal
-
-	mov	w0, #SIGTERM
-	adr	x1, terminate_handler
-	mov	w2, #SA_SIGINFO
-	bl	setsignal
-
-	mov	w0, #SIGUSR1
-	adr	x1, irritator_handler
-	mov	w2, #SA_SIGINFO
-	orr	w2, w2, #SA_NODEFER
-	bl	setsignal
-
-	mov	w0, #SIGUSR2
-	adr	x1, tickle_handler
-	mov	w2, #SA_SIGINFO
-	orr	w2, w2, #SA_NODEFER
-	bl	setsignal
-
 	mov	x22, #0		// generation number, increments per iteration
 .Ltest_loop:
 

tools/testing/selftests/arm64/fp/sve-test.S

@@ -379,6 +379,30 @@ endfunction
 .globl _start
 function _start
 _start:
+	mov	x23, #0		// Irritation signal count
+
+	mov	w0, #SIGINT
+	adr	x1, terminate_handler
+	mov	w2, #SA_SIGINFO
+	bl	setsignal
+
+	mov	w0, #SIGTERM
+	adr	x1, terminate_handler
+	mov	w2, #SA_SIGINFO
+	bl	setsignal
+
+	mov	w0, #SIGUSR1
+	adr	x1, irritator_handler
+	mov	w2, #SA_SIGINFO
+	orr	w2, w2, #SA_NODEFER
+	bl	setsignal
+
+	mov	w0, #SIGUSR2
+	adr	x1, tickle_handler
+	mov	w2, #SA_SIGINFO
+	orr	w2, w2, #SA_NODEFER
+	bl	setsignal
+
 #ifdef SSVE
 	puts	"Streaming mode "
 	smstart_sm
@@ -414,30 +438,6 @@ _start:
 	mov	x0, x20
 	bl	putdecn
 
-	mov	x23, #0		// Irritation signal count
-
-	mov	w0, #SIGINT
-	adr	x1, terminate_handler
-	mov	w2, #SA_SIGINFO
-	bl	setsignal
-
-	mov	w0, #SIGTERM
-	adr	x1, terminate_handler
-	mov	w2, #SA_SIGINFO
-	bl	setsignal
-
-	mov	w0, #SIGUSR1
-	adr	x1, irritator_handler
-	mov	w2, #SA_SIGINFO
-	orr	w2, w2, #SA_NODEFER
-	bl	setsignal
-
-	mov	w0, #SIGUSR2
-	adr	x1, tickle_handler
-	mov	w2, #SA_SIGINFO
-	orr	w2, w2, #SA_NODEFER
-	bl	setsignal
-
 #ifdef SSVE
 	smstart_sm		// syscalls will have exited streaming mode
 #endif

tools/testing/selftests/arm64/fp/za-test.S

@@ -232,6 +232,30 @@ endfunction
 .globl _start
 function _start
 _start:
+	mov	x23, #0		// signal count
+
+	mov	w0, #SIGINT
+	adr	x1, terminate_handler
+	mov	w2, #SA_SIGINFO
+	bl	setsignal
+
+	mov	w0, #SIGTERM
+	adr	x1, terminate_handler
+	mov	w2, #SA_SIGINFO
+	bl	setsignal
+
+	mov	w0, #SIGUSR1
+	adr	x1, irritator_handler
+	mov	w2, #SA_SIGINFO
+	orr	w2, w2, #SA_NODEFER
+	bl	setsignal
+
+	mov	w0, #SIGUSR2
+	adr	x1, tickle_handler
+	mov	w2, #SA_SIGINFO
+	orr	w2, w2, #SA_NODEFER
+	bl	setsignal
+
 	puts	"Streaming mode "
 	smstart_za
 
@@ -264,30 +288,6 @@ _start:
 	mov	x0, x20
 	bl	putdecn
 
-	mov	x23, #0		// Irritation signal count
-
-	mov	w0, #SIGINT
-	adr	x1, terminate_handler
-	mov	w2, #SA_SIGINFO
-	bl	setsignal
-
-	mov	w0, #SIGTERM
-	adr	x1, terminate_handler
-	mov	w2, #SA_SIGINFO
-	bl	setsignal
-
-	mov	w0, #SIGUSR1
-	adr	x1, irritator_handler
-	mov	w2, #SA_SIGINFO
-	orr	w2, w2, #SA_NODEFER
-	bl	setsignal
-
-	mov	w0, #SIGUSR2
-	adr	x1, tickle_handler
-	mov	w2, #SA_SIGINFO
-	orr	w2, w2, #SA_NODEFER
-	bl	setsignal
-
 	mov	x22, #0		// generation number, increments per iteration
 .Ltest_loop:
 	rdsvl	0, 8