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[src/trunk]: src/tests/lib/libc/sys Add ptrace() tests for reading mm* and xm...
details: https://anonhg.NetBSD.org/src/rev/e778469f486f
branches: trunk
changeset: 451198:e778469f486f
user: mgorny <mgorny%NetBSD.org@localhost>
date: Thu May 09 13:07:35 2019 +0000
description:
Add ptrace() tests for reading mm* and xmm* registers
diffstat:
tests/lib/libc/sys/t_ptrace_wait.c | 9 +-
tests/lib/libc/sys/t_ptrace_x86_wait.h | 287 ++++++++++++++++++++++++++++++++-
2 files changed, 292 insertions(+), 4 deletions(-)
diffs (truncated from 338 to 300 lines):
diff -r caaec7ca86ec -r e778469f486f tests/lib/libc/sys/t_ptrace_wait.c
--- a/tests/lib/libc/sys/t_ptrace_wait.c Thu May 09 10:56:24 2019 +0000
+++ b/tests/lib/libc/sys/t_ptrace_wait.c Thu May 09 13:07:35 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_wait.c,v 1.120 2019/05/02 22:52:21 kamil Exp $ */
+/* $NetBSD: t_ptrace_wait.c,v 1.121 2019/05/09 13:07:35 mgorny Exp $ */
/*-
* Copyright (c) 2016, 2017, 2018, 2019 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__RCSID("$NetBSD: t_ptrace_wait.c,v 1.120 2019/05/02 22:52:21 kamil Exp $");
+__RCSID("$NetBSD: t_ptrace_wait.c,v 1.121 2019/05/09 13:07:35 mgorny Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -58,6 +58,11 @@
#include <ieeefp.h> /* only need for ARM Cortex/Neon hack */
#endif
+#if defined(__i386__) || defined(__x86_64__)
+#include <cpuid.h>
+#include <x86/cpu_extended_state.h>
+#endif
+
#include <atf-c.h>
#include "h_macros.h"
diff -r caaec7ca86ec -r e778469f486f tests/lib/libc/sys/t_ptrace_x86_wait.h
--- a/tests/lib/libc/sys/t_ptrace_x86_wait.h Thu May 09 10:56:24 2019 +0000
+++ b/tests/lib/libc/sys/t_ptrace_x86_wait.h Thu May 09 13:07:35 2019 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: t_ptrace_x86_wait.h,v 1.9 2019/02/10 02:13:45 kamil Exp $ */
+/* $NetBSD: t_ptrace_x86_wait.h,v 1.10 2019/05/09 13:07:35 mgorny Exp $ */
/*-
* Copyright (c) 2016, 2017, 2018, 2019 The NetBSD Foundation, Inc.
@@ -2189,6 +2189,287 @@
TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
}
+ATF_TC(x86_regs_mm_read);
+ATF_TC_HEAD(x86_regs_mm_read, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Set MMX (mm0..mm7) reg values from debugged program and read "
+ "them via PT_GETFPREGS, comparing values against expected.");
+}
+
+__attribute__((target("mmx")))
+static __inline void set_mm_regs(const uint64_t mm[])
+{
+ __asm__ __volatile__(
+ "movq 0x00(%0), %%mm0\n\t"
+ "movq 0x08(%0), %%mm1\n\t"
+ "movq 0x10(%0), %%mm2\n\t"
+ "movq 0x18(%0), %%mm3\n\t"
+ "movq 0x20(%0), %%mm4\n\t"
+ "movq 0x28(%0), %%mm5\n\t"
+ "movq 0x30(%0), %%mm6\n\t"
+ "movq 0x38(%0), %%mm7\n\t"
+ "int3\n\t"
+ :
+ : "b"(mm)
+ : "%mm0", "%mm1", "%mm2", "%mm3", "%mm4", "%mm5", "%mm6", "%mm7"
+ );
+}
+
+#if defined(__i386__)
+__CTASSERT(sizeof(struct fpreg) == sizeof(struct save87));
+#endif
+
+ATF_TC_BODY(x86_regs_mm_read, tc)
+{
+ const int exitval = 5;
+ pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+ const int sigval = SIGTRAP;
+ int status;
+#endif
+#if defined(__x86_64__)
+ struct fpreg fpr;
+#else
+ /* TODO: replace this with 'struct fpreg' once it becomes non-opaque */
+ struct save87 fpr;
+#endif
+
+ const uint64_t mm[] = {
+ 0x0001020304050607,
+ 0x1011121314151617,
+ 0x2021222324252627,
+ 0x3031323334353637,
+ 0x4041424344454647,
+ 0x5051525354555657,
+ 0x6061626364656667,
+ 0x7071727374757677,
+ };
+
+ /* verify whether MMX is supported here */
+ DPRINTF("Before invoking cpuid\n");
+ {
+ unsigned int eax, ebx, ecx, edx;
+ if (!__get_cpuid(1, &eax, &ebx, &ecx, &edx))
+ atf_tc_skip("CPUID is not supported by the CPU");
+
+ DPRINTF("cpuid: EDX = %08x\n", edx);
+
+ if (!(edx & bit_MMX))
+ atf_tc_skip("MMX is not supported by the CPU");
+ }
+
+ DPRINTF("Before forking process PID=%d\n", getpid());
+ SYSCALL_REQUIRE((child = fork()) != -1);
+ if (child == 0) {
+ DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid());
+ FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
+
+ DPRINTF("Before running assembly from child\n");
+ set_mm_regs(mm);
+
+ DPRINTF("Before exiting of the child process\n");
+ _exit(exitval);
+ }
+ DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child);
+
+ DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+ validate_status_stopped(status, sigval);
+
+ DPRINTF("Call GETFPREGS for the child process\n");
+ SYSCALL_REQUIRE(ptrace(PT_GETFPREGS, child, &fpr, 0) != -1);
+
+#if defined(__x86_64__)
+#define MM_REG(n) fpr.fxstate.fx_87_ac[n].r.f87_mantissa
+#else
+#define MM_REG(n) fpr.s87_ac[n].f87_mantissa
+#endif
+
+ ATF_CHECK_EQ(MM_REG(0), mm[0]);
+ ATF_CHECK_EQ(MM_REG(1), mm[1]);
+ ATF_CHECK_EQ(MM_REG(2), mm[2]);
+ ATF_CHECK_EQ(MM_REG(3), mm[3]);
+ ATF_CHECK_EQ(MM_REG(4), mm[4]);
+ ATF_CHECK_EQ(MM_REG(5), mm[5]);
+ ATF_CHECK_EQ(MM_REG(6), mm[6]);
+ ATF_CHECK_EQ(MM_REG(7), mm[7]);
+
+#undef MM_REG
+
+ DPRINTF("Before resuming the child process where it left off and "
+ "without signal to be sent\n");
+ SYSCALL_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1);
+
+ DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+ validate_status_exited(status, exitval);
+
+ DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
+}
+
+__attribute__((target("sse")))
+static __inline void set_xmm_regs(const void* xmm)
+{
+ __asm__ __volatile__(
+ "movaps 0x00(%0), %%xmm0\n\t"
+ "movaps 0x10(%0), %%xmm1\n\t"
+ "movaps 0x20(%0), %%xmm2\n\t"
+ "movaps 0x30(%0), %%xmm3\n\t"
+ "movaps 0x40(%0), %%xmm4\n\t"
+ "movaps 0x50(%0), %%xmm5\n\t"
+ "movaps 0x60(%0), %%xmm6\n\t"
+ "movaps 0x70(%0), %%xmm7\n\t"
+#if defined(__x86_64__)
+ "movaps 0x80(%0), %%xmm8\n\t"
+ "movaps 0x90(%0), %%xmm9\n\t"
+ "movaps 0xA0(%0), %%xmm10\n\t"
+ "movaps 0xB0(%0), %%xmm11\n\t"
+ "movaps 0xC0(%0), %%xmm12\n\t"
+ "movaps 0xD0(%0), %%xmm13\n\t"
+ "movaps 0xE0(%0), %%xmm14\n\t"
+ "movaps 0xF0(%0), %%xmm15\n\t"
+#endif
+ "int3\n\t"
+ :
+ : "b"(xmm)
+ : "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6",
+ "%xmm7"
+#if defined(__x86_64__)
+ , "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13",
+ "%xmm14", "%xmm15"
+#endif
+ );
+}
+
+#if defined(__i386__)
+__CTASSERT(sizeof(struct xmmregs) == sizeof(struct fxsave));
+#endif
+
+ATF_TC(x86_regs_xmm_read);
+ATF_TC_HEAD(x86_regs_xmm_read, tc)
+{
+ atf_tc_set_md_var(tc, "descr",
+ "Set xmm0..xmm15 (..xmm7 on i386) reg values from debugged program "
+ "and read them via PT_GETFPREGS (PT_GETXMMREGS on i386), comparing "
+ "values against expected.");
+}
+
+ATF_TC_BODY(x86_regs_xmm_read, tc)
+{
+ const int exitval = 5;
+ pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+ const int sigval = SIGTRAP;
+ int status;
+#endif
+#if defined(__x86_64__)
+ struct fpreg fpr;
+#else
+ /* TODO: use 'struct xmmregs' when it stops being opaque */
+ struct fxsave fpr;
+#endif
+ struct xmmreg* fpr_xmm;
+
+ const struct {
+ uint64_t a, b;
+ } xmm[] __aligned(16) = {
+ { 0x0706050403020100, 0x0F0E0D0C0B0A0908, },
+ { 0x0807060504030201, 0x100F0E0D0C0B0A09, },
+ { 0x0908070605040302, 0x11100F0E0D0C0B0A, },
+ { 0x0A09080706050403, 0x1211100F0E0D0C0B, },
+ { 0x0B0A090807060504, 0x131211100F0E0D0C, },
+ { 0x0C0B0A0908070605, 0x14131211100F0E0D, },
+ { 0x0D0C0B0A09080706, 0x1514131211100F0E, },
+ { 0x0E0D0C0B0A090807, 0x161514131211100F, },
+#if defined(__x86_64__)
+ { 0x0F0E0D0C0B0A0908, 0x1716151413121110, },
+ { 0x100F0E0D0C0B0A09, 0x1817161514131211, },
+ { 0x11100F0E0D0C0B0A, 0x1918171615141312, },
+ { 0x1211100F0E0D0C0B, 0x1A19181716151413, },
+ { 0x131211100F0E0D0C, 0x1B1A191817161514, },
+ { 0x14131211100F0E0D, 0x1C1B1A1918171615, },
+ { 0x1514131211100F0E, 0x1D1C1B1A19181716, },
+ { 0x161514131211100F, 0x1E1D1C1B1A191817, },
+#endif
+ };
+
+ /* verify whether SSE is supported here */
+ DPRINTF("Before invoking cpuid\n");
+ {
+ unsigned int eax, ebx, ecx, edx;
+ if (!__get_cpuid(1, &eax, &ebx, &ecx, &edx))
+ atf_tc_skip("CPUID is not supported by the CPU");
+
+ DPRINTF("cpuid: EDX = %08x\n", edx);
+
+ if (!(edx & bit_SSE))
+ atf_tc_skip("SSE is not supported by the CPU");
+ }
+
+ DPRINTF("Before forking process PID=%d\n", getpid());
+ SYSCALL_REQUIRE((child = fork()) != -1);
+ if (child == 0) {
+ DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid());
+ FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1);
+
+ DPRINTF("Before running assembly from child\n");
+ set_xmm_regs(xmm);
+
+ DPRINTF("Before exiting of the child process\n");
+ _exit(exitval);
+ }
+ DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child);
+
+ DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME);
+ TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child);
+
+ validate_status_stopped(status, sigval);
+
+#if defined(__x86_64__)
+ DPRINTF("Call GETFPREGS for the child process\n");
+ SYSCALL_REQUIRE(ptrace(PT_GETFPREGS, child, &fpr, 0) != -1);
+ fpr_xmm = fpr.fxstate.fx_xmm;
+#else
+ DPRINTF("Call GETXMMREGS for the child process\n");
+ SYSCALL_REQUIRE(ptrace(PT_GETXMMREGS, child, &fpr, 0) != -1);
+ fpr_xmm = fpr.fx_xmm;
+#endif
+
+ ATF_CHECK(!memcmp(&fpr_xmm[0], &xmm[0], sizeof(*xmm)));
+ ATF_CHECK(!memcmp(&fpr_xmm[1], &xmm[1], sizeof(*xmm)));
+ ATF_CHECK(!memcmp(&fpr_xmm[2], &xmm[2], sizeof(*xmm)));
+ ATF_CHECK(!memcmp(&fpr_xmm[3], &xmm[3], sizeof(*xmm)));
+ ATF_CHECK(!memcmp(&fpr_xmm[4], &xmm[4], sizeof(*xmm)));
+ ATF_CHECK(!memcmp(&fpr_xmm[5], &xmm[5], sizeof(*xmm)));
+ ATF_CHECK(!memcmp(&fpr_xmm[6], &xmm[6], sizeof(*xmm)));
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