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Merge pull request #2663 from lubinszARM:pr_sigfp_fork

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PiperOrigin-RevId: 311573552
This commit is contained in:
gVisor bot
2020-05-14 11:38:57 -07:00
parent 47dfba7661 257a6bf883
commit bdf7bb71d2
2 changed files with 30 additions and 7 deletions
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test/syscalls/linux/BUILD
+1 -4
View File
@@ -835,10 +835,7 @@ cc_binary(
cc_binary(
name = "fpsig_fork_test",
testonly = 1,
srcs = select_arch(
amd64 = ["fpsig_fork.cc"],
arm64 = [],
),
srcs = ["fpsig_fork.cc"],
linkstatic = 1,
deps = [
gtest,
test/syscalls/linux/fpsig_fork.cc
+29 -3
View File
@@ -27,9 +27,22 @@ namespace testing {
namespace {
#ifdef __x86_64__
#define GET_XMM(__var, __xmm) \
asm volatile("movq %%" #__xmm ", %0" : "=r"(__var))
#define SET_XMM(__var, __xmm) asm volatile("movq %0, %%" #__xmm : : "r"(__var))
#define GET_FP0(__var) GET_XMM(__var, xmm0)
#define SET_FP0(__var) SET_XMM(__var, xmm0)
#elif __aarch64__
#define __stringify_1(x...) #x
#define __stringify(x...) __stringify_1(x)
#define GET_FPREG(var, regname) \
asm volatile("str "__stringify(regname) ", %0" : "=m"(var))
#define SET_FPREG(var, regname) \
asm volatile("ldr "__stringify(regname) ", %0" : "=m"(var))
#define GET_FP0(var) GET_FPREG(var, d0)
#define SET_FP0(var) GET_FPREG(var, d0)
#endif
int parent, child;
@@ -40,7 +53,10 @@ void sigusr1(int s, siginfo_t* siginfo, void* _uc) {
TEST_CHECK_MSG(child >= 0, "fork failed");
uint64_t val = SIGUSR1;
SET_XMM(val, xmm0);
SET_FP0(val);
uint64_t got;
GET_FP0(got);
TEST_CHECK_MSG(val == got, "Basic FP check failed in sigusr1()");
}
TEST(FPSigTest, Fork) {
@@ -67,8 +83,9 @@ TEST(FPSigTest, Fork) {
// be the one clobbered.
uint64_t expected = 0xdeadbeeffacefeed;
SET_XMM(expected, xmm0);
SET_FP0(expected);
#ifdef __x86_64__
asm volatile(
"movl %[killnr], %%eax;"
"movl %[parent], %%edi;"
@@ -81,9 +98,18 @@ TEST(FPSigTest, Fork) {
: "rax", "rdi", "rsi", "rdx",
// Clobbered by syscall.
"rcx", "r11");
#elif __aarch64__
asm volatile(
"mov x8, %0\n"
"mov x0, %1\n"
"mov x1, %2\n"
"mov x2, %3\n"
"svc #0\n" ::"r"(__NR_tgkill),
"r"(parent), "r"(parent_tid), "r"(SIGUSR1));
#endif
uint64_t got;
GET_XMM(got, xmm0);
GET_FP0(got);
if (getpid() == parent) { // Parent.
int status;