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Commit 776ca154 authored by David S. Miller's avatar David S. Miller
Browse files

sparc: Fix syscall fallback bugs in VDSO. 



First, the trap number for 32-bit syscalls is 0x10.

Also, only negate the return value when syscall error is indicated by
the carry bit being set.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c343db45

arch/sparc/vdso/vclock_gettime.c

+11 −1
Original line number Diff line number Diff line
@@ -33,9 +33,19 @@ 
#define	TICK_PRIV_BIT	(1ULL << 63)

#endif



#ifdef	CONFIG_SPARC64

#define SYSCALL_STRING							\

	"ta	0x6d;"							\

	"bcs,a	1f;"							\

	" sub	%%g0, %%o0, %%o0;"					\

	"1:"

#else

#define SYSCALL_STRING							\

	"ta	0x10;"							\

	"bcs,a	1f;"							\

	" sub	%%g0, %%o0, %%o0;"					\

	"1:"

#endif



#define SYSCALL_CLOBBERS						\

	"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",			\

tools/perf/util/event.c

+5 −0
Original line number Diff line number Diff line
@@ -1081,6 +1081,7 @@ void *cpu_map_data__alloc(struct cpu_map *map, size_t *size, u16 *type, int *max 
	}



	*size += sizeof(struct cpu_map_data);

	*size = PERF_ALIGN(*size, sizeof(u64));

	return zalloc(*size);

}
@@ -1560,7 +1561,9 @@ struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr, 


		return NULL;

	}

#if 0

try_again:

#endif

	al->map = map_groups__find(mg, al->addr);

	if (al->map == NULL) {

		/*
@@ -1572,6 +1575,7 @@ struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr, 
		 * "[vdso]" dso, but for now lets use the old trick of looking

		 * in the whole kernel symbol list.

		 */

#if 0

		if (cpumode == PERF_RECORD_MISC_USER && machine &&

		    mg != &machine->kmaps &&

		    machine__kernel_ip(machine, al->addr)) {
@@ -1579,6 +1583,7 @@ struct map *thread__find_map(struct thread *thread, u8 cpumode, u64 addr, 
			load_map = true;

			goto try_again;

		}

#endif

	} else {

		/*

		 * Kernel maps might be changed when loading symbols so loading