[src/trunk]: src/tests/lib/libc/sys Introduce tests for reading r8..r15 regis...

[mgorny <mgorny%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/fb83c7bb6a35
branches:  trunk
changeset: 998863:fb83c7bb6a35
user:      mgorny <mgorny%NetBSD.org@localhost>
date:      Sun May 05 18:16:39 2019 +0000

description:
Introduce tests for reading r8..r15 registers.

diffstat:

 tests/lib/libc/sys/t_ptrace_amd64_wait.h |  92 +++++++++++++++++++++++++++++++-
 1 files changed, 90 insertions(+), 2 deletions(-)

diffs (111 lines):

diff -r af86ede2d884 -r fb83c7bb6a35 tests/lib/libc/sys/t_ptrace_amd64_wait.h
--- a/tests/lib/libc/sys/t_ptrace_amd64_wait.h  Sun May 05 18:15:40 2019 +0000
+++ b/tests/lib/libc/sys/t_ptrace_amd64_wait.h  Sun May 05 18:16:39 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_ptrace_amd64_wait.h,v 1.7 2019/05/05 10:04:11 mgorny Exp $   */
+/*     $NetBSD: t_ptrace_amd64_wait.h,v 1.8 2019/05/05 18:16:39 mgorny Exp $   */
 
 /*-
  * Copyright (c) 2016, 2017, 2018, 2019 The NetBSD Foundation, Inc.
@@ -198,12 +198,100 @@
        TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0));
 }
 
+ATF_TC(x86_64_regs_r8_read);
+ATF_TC_HEAD(x86_64_regs_r8_read, tc)
+{
+       atf_tc_set_md_var(tc, "descr",
+               "Set r8..r15 reg values from debugged program and read "
+               "them via PT_GETREGS, comparing values against expected.");
+}
+
+ATF_TC_BODY(x86_64_regs_r8_read, tc)
+{
+       const int exitval = 5;
+       const int sigval = SIGTRAP;
+       pid_t child, wpid;
+#if defined(TWAIT_HAVE_STATUS)
+       int status;
+#endif
+       struct reg gpr;
+
+       const uint64_t r8[] = {
+               0x0001020304050607,
+               0x1011121314151617,
+               0x2021222324252627,
+               0x3031323334353637,
+               0x4041424344454647,
+               0x5051525354555657,
+               0x6061626364656667,
+               0x7071727374757677,
+       };
+
+       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");
+
+               __asm__ __volatile__(
+                       "movq    0x00(%%rbx), %%r8\n\t"
+                       "movq    0x08(%%rbx), %%r9\n\t"
+                       "movq    0x10(%%rbx), %%r10\n\t"
+                       "movq    0x18(%%rbx), %%r11\n\t"
+                       "movq    0x20(%%rbx), %%r12\n\t"
+                       "movq    0x28(%%rbx), %%r13\n\t"
+                       "movq    0x30(%%rbx), %%r14\n\t"
+                       "movq    0x38(%%rbx), %%r15\n\t"
+                       "int3\n\t"
+                       :
+                       : "b"(r8)
+                       : "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15"
+               );
+
+               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 GETREGS for the child process\n");
+       SYSCALL_REQUIRE(ptrace(PT_GETREGS, child, &gpr, 0) != -1);
+
+       ATF_CHECK_EQ((uint64_t)gpr.regs[_REG_R8], r8[0]);
+       ATF_CHECK_EQ((uint64_t)gpr.regs[_REG_R9], r8[1]);
+       ATF_CHECK_EQ((uint64_t)gpr.regs[_REG_R10], r8[2]);
+       ATF_CHECK_EQ((uint64_t)gpr.regs[_REG_R11], r8[3]);
+       ATF_CHECK_EQ((uint64_t)gpr.regs[_REG_R12], r8[4]);
+       ATF_CHECK_EQ((uint64_t)gpr.regs[_REG_R13], r8[5]);
+       ATF_CHECK_EQ((uint64_t)gpr.regs[_REG_R14], r8[6]);
+       ATF_CHECK_EQ((uint64_t)gpr.regs[_REG_R15], r8[7]);
+
+       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));
+}
+
 /// ----------------------------------------------------------------------------
 
 
 #define ATF_TP_ADD_TCS_PTRACE_WAIT_AMD64() \
        ATF_TP_ADD_TC_HAVE_GPREGS(tp, x86_64_regs1); \
-       ATF_TP_ADD_TC_HAVE_GPREGS(tp, x86_64_regs_gp_read);
+       ATF_TP_ADD_TC_HAVE_GPREGS(tp, x86_64_regs_gp_read); \
+       ATF_TP_ADD_TC_HAVE_GPREGS(tp, x86_64_regs_r8_read);
 #else
 #define ATF_TP_ADD_TCS_PTRACE_WAIT_AMD64()
 #endif