diff options
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/kuser32.S | 6 | ||||
| -rw-r--r-- | arch/arm64/kernel/stacktrace.c | 6 | ||||
| -rw-r--r-- | arch/arm64/kernel/vdso.c | 4 | ||||
| -rw-r--r-- | arch/arm64/kernel/vdso/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/vdso/gettimeofday.S | 7 |
5 files changed, 18 insertions, 7 deletions
diff --git a/arch/arm64/kernel/kuser32.S b/arch/arm64/kernel/kuser32.S index 63c48ffdf23..7787208e8cc 100644 --- a/arch/arm64/kernel/kuser32.S +++ b/arch/arm64/kernel/kuser32.S @@ -38,12 +38,13 @@ __kuser_cmpxchg64: // 0xffff0f60 .inst 0xe92d00f0 // push {r4, r5, r6, r7} .inst 0xe1c040d0 // ldrd r4, r5, [r0] .inst 0xe1c160d0 // ldrd r6, r7, [r1] - .inst 0xe1b20e9f // 1: ldaexd r0, r1, [r2] + .inst 0xe1b20f9f // 1: ldrexd r0, r1, [r2] .inst 0xe0303004 // eors r3, r0, r4 .inst 0x00313005 // eoreqs r3, r1, r5 .inst 0x01a23e96 // stlexdeq r3, r6, [r2] .inst 0x03330001 // teqeq r3, #1 .inst 0x0afffff9 // beq 1b + .inst 0xf57ff05b // dmb ish .inst 0xe2730000 // rsbs r0, r3, #0 .inst 0xe8bd00f0 // pop {r4, r5, r6, r7} .inst 0xe12fff1e // bx lr @@ -55,11 +56,12 @@ __kuser_memory_barrier: // 0xffff0fa0 .align 5 __kuser_cmpxchg: // 0xffff0fc0 - .inst 0xe1923e9f // 1: ldaex r3, [r2] + .inst 0xe1923f9f // 1: ldrex r3, [r2] .inst 0xe0533000 // subs r3, r3, r0 .inst 0x01823e91 // stlexeq r3, r1, [r2] .inst 0x03330001 // teqeq r3, #1 .inst 0x0afffffa // beq 1b + .inst 0xf57ff05b // dmb ish .inst 0xe2730000 // rsbs r0, r3, #0 .inst 0xe12fff1e // bx lr diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c index c3b6c63ea5f..38f0558f0c0 100644 --- a/arch/arm64/kernel/stacktrace.c +++ b/arch/arm64/kernel/stacktrace.c @@ -48,7 +48,11 @@ int unwind_frame(struct stackframe *frame) frame->sp = fp + 0x10; frame->fp = *(unsigned long *)(fp); - frame->pc = *(unsigned long *)(fp + 8); + /* + * -4 here because we care about the PC at time of bl, + * not where the return will go. + */ + frame->pc = *(unsigned long *)(fp + 8) - 4; return 0; } diff --git a/arch/arm64/kernel/vdso.c b/arch/arm64/kernel/vdso.c index 65d40cf6945..a7149cae161 100644 --- a/arch/arm64/kernel/vdso.c +++ b/arch/arm64/kernel/vdso.c @@ -238,6 +238,8 @@ void update_vsyscall(struct timekeeper *tk) vdso_data->use_syscall = use_syscall; vdso_data->xtime_coarse_sec = xtime_coarse.tv_sec; vdso_data->xtime_coarse_nsec = xtime_coarse.tv_nsec; + vdso_data->wtm_clock_sec = tk->wall_to_monotonic.tv_sec; + vdso_data->wtm_clock_nsec = tk->wall_to_monotonic.tv_nsec; if (!use_syscall) { vdso_data->cs_cycle_last = tk->clock->cycle_last; @@ -245,8 +247,6 @@ void update_vsyscall(struct timekeeper *tk) vdso_data->xtime_clock_nsec = tk->xtime_nsec; vdso_data->cs_mult = tk->mult; vdso_data->cs_shift = tk->shift; - vdso_data->wtm_clock_sec = tk->wall_to_monotonic.tv_sec; - vdso_data->wtm_clock_nsec = tk->wall_to_monotonic.tv_nsec; } smp_wmb(); diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile index d8064af42e6..6d20b7d162d 100644 --- a/arch/arm64/kernel/vdso/Makefile +++ b/arch/arm64/kernel/vdso/Makefile @@ -48,7 +48,7 @@ $(obj-vdso): %.o: %.S # Actual build commands quiet_cmd_vdsold = VDSOL $@ - cmd_vdsold = $(CC) $(c_flags) -Wl,-T $^ -o $@ + cmd_vdsold = $(CC) $(c_flags) -Wl,-n -Wl,-T $^ -o $@ quiet_cmd_vdsoas = VDSOA $@ cmd_vdsoas = $(CC) $(a_flags) -c -o $@ $< diff --git a/arch/arm64/kernel/vdso/gettimeofday.S b/arch/arm64/kernel/vdso/gettimeofday.S index f0a6d10b521..fe652ffd34c 100644 --- a/arch/arm64/kernel/vdso/gettimeofday.S +++ b/arch/arm64/kernel/vdso/gettimeofday.S @@ -103,6 +103,8 @@ ENTRY(__kernel_clock_gettime) bl __do_get_tspec seqcnt_check w9, 1b + mov x30, x2 + cmp w0, #CLOCK_MONOTONIC b.ne 6f @@ -118,6 +120,9 @@ ENTRY(__kernel_clock_gettime) ccmp w0, #CLOCK_MONOTONIC_COARSE, #0x4, ne b.ne 8f + /* xtime_coarse_nsec is already right-shifted */ + mov x12, #0 + /* Get coarse timespec. */ adr vdso_data, _vdso_data 3: seqcnt_acquire @@ -156,7 +161,7 @@ ENTRY(__kernel_clock_gettime) lsr x11, x11, x12 stp x10, x11, [x1, #TSPEC_TV_SEC] mov x0, xzr - ret x2 + ret 7: mov x30, x2 8: /* Syscall fallback. */ |