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[src/trunk]: src/tests/lib/libc/sys Add PT_SET*REGS tests for mm/xmm registers.



details:   https://anonhg.NetBSD.org/src/rev/b3d941afd2dd
branches:  trunk
changeset: 841371:b3d941afd2dd
user:      mgorny <mgorny%NetBSD.org@localhost>
date:      Fri May 10 18:07:10 2019 +0000

description:
Add PT_SET*REGS tests for mm/xmm registers.

diffstat:

 tests/lib/libc/sys/t_ptrace_x86_wait.h |  353 ++++++++++++++++++++++++++++++++-
 1 files changed, 351 insertions(+), 2 deletions(-)

diffs (truncated from 381 to 300 lines):

diff -r d80eec8c8aa7 -r b3d941afd2dd tests/lib/libc/sys/t_ptrace_x86_wait.h
--- a/tests/lib/libc/sys/t_ptrace_x86_wait.h    Fri May 10 17:34:26 2019 +0000
+++ b/tests/lib/libc/sys/t_ptrace_x86_wait.h    Fri May 10 18:07:10 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_ptrace_x86_wait.h,v 1.12 2019/05/10 17:34:26 mgorny Exp $    */
+/*     $NetBSD: t_ptrace_x86_wait.h,v 1.13 2019/05/10 18:07:10 mgorny Exp $    */
 
 /*-
  * Copyright (c) 2016, 2017, 2018, 2019 The NetBSD Foundation, Inc.
@@ -2302,6 +2302,146 @@
        TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
 }
 
+__attribute__((target("mmx")))
+static __inline void get_mm_regs(uint64_t v_mm[])
+{
+       const uint64_t fill = 0x0F0F0F0F0F0F0F0F;
+
+       __asm__ __volatile__(
+               /* fill registers with clobber pattern */
+               "movq    %1, %%mm0\n\t"
+               "movq    %1, %%mm1\n\t"
+               "movq    %1, %%mm2\n\t"
+               "movq    %1, %%mm3\n\t"
+               "movq    %1, %%mm4\n\t"
+               "movq    %1, %%mm5\n\t"
+               "movq    %1, %%mm6\n\t"
+               "movq    %1, %%mm7\n\t"
+               "\n\t"
+               "int3\n\t"
+               "\n\t"
+               "movq    %%mm0, 0x00(%0)\n\t"
+               "movq    %%mm1, 0x08(%0)\n\t"
+               "movq    %%mm2, 0x10(%0)\n\t"
+               "movq    %%mm3, 0x18(%0)\n\t"
+               "movq    %%mm4, 0x20(%0)\n\t"
+               "movq    %%mm5, 0x28(%0)\n\t"
+               "movq    %%mm6, 0x30(%0)\n\t"
+               "movq    %%mm7, 0x38(%0)\n\t"
+               :
+               : "a"(v_mm), "m"(fill)
+               : "%mm0", "%mm1", "%mm2", "%mm3", "%mm4", "%mm5", "%mm6", "%mm7"
+       );
+}
+
+ATF_TC(x86_regs_mm_write);
+ATF_TC_HEAD(x86_regs_mm_write, tc)
+{
+       atf_tc_set_md_var(tc, "descr",
+               "Set mm0..mm7 reg values into a debugged program via "
+               "PT_SETFPREGS and compare the result against expected.");
+}
+
+ATF_TC_BODY(x86_regs_mm_write, tc)
+{
+       const int exitval = 5;
+       pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+       const int sigval = SIGTRAP;
+       int status;
+#endif
+       struct fpreg fpr;
+
+       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) {
+               uint64_t v_mm[8];
+
+               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");
+               get_mm_regs(v_mm);
+
+               FORKEE_ASSERT_EQ(v_mm[0], mm[0]);
+               FORKEE_ASSERT_EQ(v_mm[1], mm[1]);
+               FORKEE_ASSERT_EQ(v_mm[2], mm[2]);
+               FORKEE_ASSERT_EQ(v_mm[3], mm[3]);
+               FORKEE_ASSERT_EQ(v_mm[4], mm[4]);
+               FORKEE_ASSERT_EQ(v_mm[5], mm[5]);
+               FORKEE_ASSERT_EQ(v_mm[6], mm[6]);
+               FORKEE_ASSERT_EQ(v_mm[7], mm[7]);
+
+               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.fstate.s87_ac[n].f87_mantissa
+#endif
+
+       MM_REG(0) = mm[0];
+       MM_REG(1) = mm[1];
+       MM_REG(2) = mm[2];
+       MM_REG(3) = mm[3];
+       MM_REG(4) = mm[4];
+       MM_REG(5) = mm[5];
+       MM_REG(6) = mm[6];
+       MM_REG(7) = mm[7];
+
+#undef MM_REG
+
+       DPRINTF("Call SETFPREGS for the child process\n");
+       SYSCALL_REQUIRE(ptrace(PT_SETFPREGS, child, &fpr, 0) != -1);
+
+       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)
 {
@@ -2453,6 +2593,213 @@
        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 get_xmm_regs(void* v_xmm)
+{
+       const struct {
+               uint64_t a, b;
+       } fill = {0x0F0F0F0F0F0F0F0F, 0x0F0F0F0F0F0F0F0F};
+
+       __asm__ __volatile__(
+               /* fill registers with clobber pattern */
+               "movaps  %1, %%xmm0\n\t"
+               "movaps  %1, %%xmm1\n\t"
+               "movaps  %1, %%xmm2\n\t"
+               "movaps  %1, %%xmm3\n\t"
+               "movaps  %1, %%xmm4\n\t"
+               "movaps  %1, %%xmm5\n\t"
+               "movaps  %1, %%xmm6\n\t"
+               "movaps  %1, %%xmm7\n\t"
+#if defined(__x86_64__)
+               "movaps  %1, %%xmm8\n\t"
+               "movaps  %1, %%xmm9\n\t"
+               "movaps  %1, %%xmm10\n\t"
+               "movaps  %1, %%xmm11\n\t"
+               "movaps  %1, %%xmm12\n\t"
+               "movaps  %1, %%xmm13\n\t"
+               "movaps  %1, %%xmm14\n\t"
+               "movaps  %1, %%xmm15\n\t"
+#endif
+               "\n\t"
+               "int3\n\t"
+               "\n\t"
+               "movaps  %%xmm0, 0x00(%0)\n\t"
+               "movaps  %%xmm1, 0x10(%0)\n\t"
+               "movaps  %%xmm2, 0x20(%0)\n\t"
+               "movaps  %%xmm3, 0x30(%0)\n\t"
+               "movaps  %%xmm4, 0x40(%0)\n\t"
+               "movaps  %%xmm5, 0x50(%0)\n\t"
+               "movaps  %%xmm6, 0x60(%0)\n\t"
+               "movaps  %%xmm7, 0x70(%0)\n\t"
+#if defined(__x86_64__)
+               "movaps  %%xmm8, 0x80(%0)\n\t"
+               "movaps  %%xmm9, 0x90(%0)\n\t"
+               "movaps  %%xmm10, 0xA0(%0)\n\t"
+               "movaps  %%xmm11, 0xB0(%0)\n\t"
+               "movaps  %%xmm12, 0xC0(%0)\n\t"
+               "movaps  %%xmm13, 0xD0(%0)\n\t"
+               "movaps  %%xmm14, 0xE0(%0)\n\t"
+               "movaps  %%xmm15, 0xF0(%0)\n\t"
+#endif
+               :
+               : "a"(v_xmm), "m"(fill)
+               : "%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7"
+#if defined(__x86_64__)
+               , "%xmm8", "%xmm9", "%xmm10", "%xmm11", "%xmm12", "%xmm13", "%xmm14",
+               "%xmm15"
+#endif
+       );
+}
+
+ATF_TC(x86_regs_xmm_write);
+ATF_TC_HEAD(x86_regs_xmm_write, tc)
+{
+       atf_tc_set_md_var(tc, "descr",
+               "Set xmm0..xmm15 (..xmm7 on i386) reg values into a debugged "
+               "program via PT_SETFPREGS (PT_SETXMMREGS on i386) and compare "
+               "the result against expected.");
+}
+
+ATF_TC_BODY(x86_regs_xmm_write, 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
+       struct xmmregs fpr;
+#endif
+
+       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) {
+               struct {
+                       uint64_t a, b;
+               } v_xmm[16] __aligned(16);
+
+               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");
+               get_xmm_regs(v_xmm);
+
+               FORKEE_ASSERT(!memcmp(&v_xmm[0], &xmm[0], sizeof(*xmm)));
+               FORKEE_ASSERT(!memcmp(&v_xmm[1], &xmm[1], sizeof(*xmm)));
+               FORKEE_ASSERT(!memcmp(&v_xmm[2], &xmm[2], sizeof(*xmm)));
+               FORKEE_ASSERT(!memcmp(&v_xmm[3], &xmm[3], sizeof(*xmm)));
+               FORKEE_ASSERT(!memcmp(&v_xmm[4], &xmm[4], sizeof(*xmm)));
+               FORKEE_ASSERT(!memcmp(&v_xmm[5], &xmm[5], sizeof(*xmm)));
+               FORKEE_ASSERT(!memcmp(&v_xmm[6], &xmm[6], sizeof(*xmm)));
+               FORKEE_ASSERT(!memcmp(&v_xmm[7], &xmm[7], sizeof(*xmm)));
+#if defined(__x86_64__)



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