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hwasan: Check if Intel LAM_U57 is enabled

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When -fsanitize=hwaddress is used, libhwasan will try to enable LAM_U57
in the startup code.  Update the target check to enable hwaddress tests
if LAM_U57 is enabled.  Also compile hwaddress tests with -mlam=u57 on
x86-64 since hwasan requires LAM_U57 on x86-64.

	* lib/hwasan-dg.exp (check_effective_target_hwaddress_exec):
	Return 1 if Intel LAM_U57 is enabled.
	(hwasan_init): Add -mlam=u57 on x86-64.
This commit is contained in:
H.J. Lu 2024-01-09 08:46:59 -08:00 committed by H.J. Lu
parent ac913d5d51
commit af66955000
1 changed files with 22 additions and 3 deletions
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25
gcc/testsuite/lib/hwasan-dg.exp
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@ -44,11 +44,25 @@ proc check_effective_target_hwaddress_exec {} {
#ifdef __cplusplus
extern "C" {
#endif
extern int arch_prctl (int, unsigned long int *);
extern int prctl(int, unsigned long, unsigned long, unsigned long, unsigned long);
#ifdef __cplusplus
}
#endif
int main (void) {
#ifdef __x86_64__
# ifdef __LP64__
# define ARCH_GET_UNTAG_MASK 0x4001
# define LAM_U57_MASK (0x3fULL << 57)
unsigned long mask = 0;
if (arch_prctl(ARCH_GET_UNTAG_MASK, &mask) != 0)
return 1;
if (mask != ~LAM_U57_MASK)
return 1;
return 0;
# endif
return 1;
#else
#define PR_SET_TAGGED_ADDR_CTRL 55
#define PR_GET_TAGGED_ADDR_CTRL 56
#define PR_TAGGED_ADDR_ENABLE (1UL << 0)
@ -58,6 +72,7 @@ proc check_effective_target_hwaddress_exec {} {
|| !prctl(PR_GET_TAGGED_ADDR_CTRL, 0, 0, 0, 0))
return 1;
return 0;
#endif
}
}] {
return 0;
@ -102,6 +117,10 @@ proc hwasan_init { args } {
setenv HWASAN_OPTIONS "random_tags=0"
if [istarget x86_64-*-*] {
set target_hwasan_flags "-mlam=u57"
}
set link_flags ""
if ![is_remote host] {
if [info exists TOOL_OPTIONS] {
@ -119,12 +138,12 @@ proc hwasan_init { args } {
if [info exists ALWAYS_CXXFLAGS] {
set hwasan_saved_ALWAYS_CXXFLAGS $ALWAYS_CXXFLAGS
set ALWAYS_CXXFLAGS [concat "{ldflags=$link_flags}" $ALWAYS_CXXFLAGS]
set ALWAYS_CXXFLAGS [concat "{additional_flags=-fsanitize=hwaddress --param hwasan-random-frame-tag=0 -g $include_flags}" $ALWAYS_CXXFLAGS]
set ALWAYS_CXXFLAGS [concat "{additional_flags=-fsanitize=hwaddress $target_hwasan_flags --param hwasan-random-frame-tag=0 -g $include_flags}" $ALWAYS_CXXFLAGS]
} else {
if [info exists TEST_ALWAYS_FLAGS] {
set TEST_ALWAYS_FLAGS "$link_flags -fsanitize=hwaddress --param hwasan-random-frame-tag=0 -g $include_flags $TEST_ALWAYS_FLAGS"
set TEST_ALWAYS_FLAGS "$link_flags -fsanitize=hwaddress $target_hwasan_flags --param hwasan-random-frame-tag=0 -g $include_flags $TEST_ALWAYS_FLAGS"
} else {
set TEST_ALWAYS_FLAGS "$link_flags -fsanitize=hwaddress --param hwasan-random-frame-tag=0 -g $include_flags"
set TEST_ALWAYS_FLAGS "$link_flags -fsanitize=hwaddress $target_hwasan_flags --param hwasan-random-frame-tag=0 -g $include_flags"
}
}
}