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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /tools/testing/selftests/powerpc/primitives
Initial import
Diffstat (limited to 'tools/testing/selftests/powerpc/primitives')
-rw-r--r--tools/testing/selftests/powerpc/primitives/.gitignore1
-rw-r--r--tools/testing/selftests/powerpc/primitives/Makefile12
l---------tools/testing/selftests/powerpc/primitives/asm/asm-compat.h1
-rw-r--r--tools/testing/selftests/powerpc/primitives/asm/ppc-opcode.h0
-rw-r--r--tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c147
l---------tools/testing/selftests/powerpc/primitives/word-at-a-time.h1
6 files changed, 162 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/primitives/.gitignore b/tools/testing/selftests/powerpc/primitives/.gitignore
new file mode 100644
index 000000000..4cc4e31be
--- /dev/null
+++ b/tools/testing/selftests/powerpc/primitives/.gitignore
@@ -0,0 +1 @@
+load_unaligned_zeropad
diff --git a/tools/testing/selftests/powerpc/primitives/Makefile b/tools/testing/selftests/powerpc/primitives/Makefile
new file mode 100644
index 000000000..b68c6221d
--- /dev/null
+++ b/tools/testing/selftests/powerpc/primitives/Makefile
@@ -0,0 +1,12 @@
+CFLAGS += -I$(CURDIR)
+
+TEST_PROGS := load_unaligned_zeropad
+
+all: $(TEST_PROGS)
+
+$(TEST_PROGS): ../harness.c
+
+include ../../lib.mk
+
+clean:
+ rm -f $(TEST_PROGS) *.o
diff --git a/tools/testing/selftests/powerpc/primitives/asm/asm-compat.h b/tools/testing/selftests/powerpc/primitives/asm/asm-compat.h
new file mode 120000
index 000000000..b14255e15
--- /dev/null
+++ b/tools/testing/selftests/powerpc/primitives/asm/asm-compat.h
@@ -0,0 +1 @@
+../.././../../../../arch/powerpc/include/asm/asm-compat.h \ No newline at end of file
diff --git a/tools/testing/selftests/powerpc/primitives/asm/ppc-opcode.h b/tools/testing/selftests/powerpc/primitives/asm/ppc-opcode.h
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/tools/testing/selftests/powerpc/primitives/asm/ppc-opcode.h
diff --git a/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c b/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c
new file mode 100644
index 000000000..d1b647509
--- /dev/null
+++ b/tools/testing/selftests/powerpc/primitives/load_unaligned_zeropad.c
@@ -0,0 +1,147 @@
+/*
+ * Userspace test harness for load_unaligned_zeropad. Creates two
+ * pages and uses mprotect to prevent access to the second page and
+ * a SEGV handler that walks the exception tables and runs the fixup
+ * routine.
+ *
+ * The results are compared against a normal load that is that is
+ * performed while access to the second page is enabled via mprotect.
+ *
+ * Copyright (C) 2014 Anton Blanchard <anton@au.ibm.com>, IBM
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <signal.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+#define FIXUP_SECTION ".ex_fixup"
+
+#include "word-at-a-time.h"
+
+#include "utils.h"
+
+
+static int page_size;
+static char *mem_region;
+
+static int protect_region(void)
+{
+ if (mprotect(mem_region + page_size, page_size, PROT_NONE)) {
+ perror("mprotect");
+ return 1;
+ }
+
+ return 0;
+}
+
+static int unprotect_region(void)
+{
+ if (mprotect(mem_region + page_size, page_size, PROT_READ|PROT_WRITE)) {
+ perror("mprotect");
+ return 1;
+ }
+
+ return 0;
+}
+
+extern char __start___ex_table[];
+extern char __stop___ex_table[];
+
+#if defined(__powerpc64__)
+#define UCONTEXT_NIA(UC) (UC)->uc_mcontext.gp_regs[PT_NIP]
+#elif defined(__powerpc__)
+#define UCONTEXT_NIA(UC) (UC)->uc_mcontext.uc_regs->gregs[PT_NIP]
+#else
+#error implement UCONTEXT_NIA
+#endif
+
+static int segv_error;
+
+static void segv_handler(int signr, siginfo_t *info, void *ptr)
+{
+ ucontext_t *uc = (ucontext_t *)ptr;
+ unsigned long addr = (unsigned long)info->si_addr;
+ unsigned long *ip = &UCONTEXT_NIA(uc);
+ unsigned long *ex_p = (unsigned long *)__start___ex_table;
+
+ while (ex_p < (unsigned long *)__stop___ex_table) {
+ unsigned long insn, fixup;
+
+ insn = *ex_p++;
+ fixup = *ex_p++;
+
+ if (insn == *ip) {
+ *ip = fixup;
+ return;
+ }
+ }
+
+ printf("No exception table match for NIA %lx ADDR %lx\n", *ip, addr);
+ segv_error++;
+}
+
+static void setup_segv_handler(void)
+{
+ struct sigaction action;
+
+ memset(&action, 0, sizeof(action));
+ action.sa_sigaction = segv_handler;
+ action.sa_flags = SA_SIGINFO;
+ sigaction(SIGSEGV, &action, NULL);
+}
+
+static int do_one_test(char *p, int page_offset)
+{
+ unsigned long should;
+ unsigned long got;
+
+ FAIL_IF(unprotect_region());
+ should = *(unsigned long *)p;
+ FAIL_IF(protect_region());
+
+ got = load_unaligned_zeropad(p);
+
+ if (should != got)
+ printf("offset %u load_unaligned_zeropad returned 0x%lx, should be 0x%lx\n", page_offset, got, should);
+
+ return 0;
+}
+
+static int test_body(void)
+{
+ unsigned long i;
+
+ page_size = getpagesize();
+ mem_region = mmap(NULL, page_size * 2, PROT_READ|PROT_WRITE,
+ MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+
+ FAIL_IF(mem_region == MAP_FAILED);
+
+ for (i = 0; i < page_size; i++)
+ mem_region[i] = i;
+
+ memset(mem_region+page_size, 0, page_size);
+
+ setup_segv_handler();
+
+ for (i = 0; i < page_size; i++)
+ FAIL_IF(do_one_test(mem_region+i, i));
+
+ FAIL_IF(segv_error);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(test_body, "load_unaligned_zeropad");
+}
diff --git a/tools/testing/selftests/powerpc/primitives/word-at-a-time.h b/tools/testing/selftests/powerpc/primitives/word-at-a-time.h
new file mode 120000
index 000000000..eb74401b5
--- /dev/null
+++ b/tools/testing/selftests/powerpc/primitives/word-at-a-time.h
@@ -0,0 +1 @@
+../../../../../arch/powerpc/include/asm/word-at-a-time.h \ No newline at end of file