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Revert "selftests/x86/fsgsbase: Test ptracer-induced GS base write with FSGSBASE" 

This reverts commit 5bc369e5a024d0aa2f5a27a1bb77a30a1c0db51d.
This commit is contained in:
Fuhai Wang 2021-07-21 15:46:06 +08:00
parent cd5bc44308
commit b41b63a9d9
1 changed files with 2 additions and 9 deletions
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11
tools/testing/selftests/x86/fsgsbase.c
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@ -527,7 +527,7 @@ static void test_ptrace_write_gsbase(void)
wait(&status);
if (WSTOPSIG(status) == SIGTRAP) {
unsigned long gs, base;
unsigned long gs;
unsigned long gs_offset = USER_REGS_OFFSET(gs);
unsigned long base_offset = USER_REGS_OFFSET(gs_base);
@ -543,7 +543,6 @@ static void test_ptrace_write_gsbase(void)
err(1, "PTRACE_POKEUSER");
gs = ptrace(PTRACE_PEEKUSER, child, gs_offset, NULL);
base = ptrace(PTRACE_PEEKUSER, child, base_offset, NULL);
/*
* In a non-FSGSBASE system, the nonzero selector will load
@ -564,14 +563,8 @@ static void test_ptrace_write_gsbase(void)
*/
if (gs == 0)
printf("\tNote: this is expected behavior on older kernels.\n");
} else if (have_fsgsbase && (base != 0xFF)) {
nerrs++;
printf("[FAIL]\tGSBASE changed to %lx\n", base);
} else {
printf("[OK]\tGS remained 0x%hx", *shared_scratch);
if (have_fsgsbase)
printf(" and GSBASE changed to 0xFF");
printf("\n");
printf("[OK]\tGS remained 0x%hx\n", *shared_scratch);
}
}