selftests/rseq: Introduce rseq_get_abi() helper

This is done in preparation for the selftest uplift to become compatible
with glibc-2.35.

glibc-2.35 exposes the rseq per-thread data in the TCB, accessible
at an offset from the thread pointer, rather than through an actual
Thread-Local Storage (TLS) variable, as the kernel selftests initially
expected.

Introduce a rseq_get_abi() helper, initially using the __rseq_abi
TLS variable, in preparation for changing this userspace ABI for one
which is compatible with glibc-2.35.

Note that the __rseq_abi TLS and glibc-2.35's ABI for per-thread data
cannot actively coexist in a process, because the kernel supports only
a single rseq registration per thread.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220124171253.22072-6-mathieu.desnoyers@efficios.com

diff --git a/tools/testing/selftests/rseq/rseq-arm.h b/tools/testing/selftests/rseq/rseq-arm.h
index 5943c816c07ce135ff8c6fcb830d98e815d7503a..6716540e17c614d51c4a4ecb9a682ac96ab9d309 100644 (file)
--- a/tools/testing/selftests/rseq/rseq-arm.h
+++ b/tools/testing/selftests/rseq/rseq-arm.h
@@ -185,8 +185,8 @@ int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
                "5:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),
                  [newv]                "r" (newv)
@@ -255,8 +255,8 @@ int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
                "5:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expectnot]           "r" (expectnot),
@@ -316,8 +316,8 @@ int rseq_addv(intptr_t *v, intptr_t count, int cpu)
                "5:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [v]                   "m" (*v),
                  [count]               "Ir" (count)
                  RSEQ_INJECT_INPUT
@@ -381,8 +381,8 @@ int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
                "5:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* try store input */
                  [v2]                  "m" (*v2),
                  [newv2]               "r" (newv2),
@@ -457,8 +457,8 @@ int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
                "5:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* try store input */
                  [v2]                  "m" (*v2),
                  [newv2]               "r" (newv2),
@@ -537,8 +537,8 @@ int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
                "5:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* cmp2 input */
                  [v2]                  "m" (*v2),
                  [expect2]             "r" (expect2),
@@ -657,8 +657,8 @@ int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
                "8:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),
@@ -782,8 +782,8 @@ int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
                "8:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),

diff --git a/tools/testing/selftests/rseq/rseq-arm64.h b/tools/testing/selftests/rseq/rseq-arm64.h
index 200dae9e4208c49fc3262d3cc4a5a96cefecf305..b9d9b3aa6e9b4240ccfd7065f2392d8c4546da9d 100644 (file)
--- a/tools/testing/selftests/rseq/rseq-arm64.h
+++ b/tools/testing/selftests/rseq/rseq-arm64.h
@@ -230,8 +230,8 @@ int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "Qo" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "Qo" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [v]                   "Qo" (*v),
                  [expect]              "r" (expect),
                  [newv]                "r" (newv)
@@ -287,8 +287,8 @@ int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "Qo" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "Qo" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [v]                   "Qo" (*v),
                  [expectnot]           "r" (expectnot),
                  [load]                "Qo" (*load),
@@ -337,8 +337,8 @@ int rseq_addv(intptr_t *v, intptr_t count, int cpu)
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "Qo" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "Qo" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [v]                   "Qo" (*v),
                  [count]               "r" (count)
                  RSEQ_INJECT_INPUT
@@ -388,8 +388,8 @@ int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "Qo" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "Qo" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [expect]              "r" (expect),
                  [v]                   "Qo" (*v),
                  [newv]                "r" (newv),
@@ -447,8 +447,8 @@ int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "Qo" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "Qo" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [expect]              "r" (expect),
                  [v]                   "Qo" (*v),
                  [newv]                "r" (newv),
@@ -508,8 +508,8 @@ int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "Qo" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "Qo" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [v]                   "Qo" (*v),
                  [expect]              "r" (expect),
                  [v2]                  "Qo" (*v2),
@@ -569,8 +569,8 @@ int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "Qo" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "Qo" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [expect]              "r" (expect),
                  [v]                   "Qo" (*v),
                  [newv]                "r" (newv),
@@ -629,8 +629,8 @@ int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "Qo" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "Qo" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [expect]              "r" (expect),
                  [v]                   "Qo" (*v),
                  [newv]                "r" (newv),

diff --git a/tools/testing/selftests/rseq/rseq-mips.h b/tools/testing/selftests/rseq/rseq-mips.h
index e989e7c14b0972e52c66aba3a676d0e2cc41b448..2b1f5bd9526819cfb9a76158887cde6e391bbb97 100644 (file)
--- a/tools/testing/selftests/rseq/rseq-mips.h
+++ b/tools/testing/selftests/rseq/rseq-mips.h
@@ -190,8 +190,8 @@ int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
                "5:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),
                  [newv]                "r" (newv)
@@ -258,8 +258,8 @@ int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
                "5:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expectnot]           "r" (expectnot),
@@ -319,8 +319,8 @@ int rseq_addv(intptr_t *v, intptr_t count, int cpu)
                "5:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [v]                   "m" (*v),
                  [count]               "Ir" (count)
                  RSEQ_INJECT_INPUT
@@ -382,8 +382,8 @@ int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
                "5:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* try store input */
                  [v2]                  "m" (*v2),
                  [newv2]               "r" (newv2),
@@ -456,8 +456,8 @@ int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
                "5:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* try store input */
                  [v2]                  "m" (*v2),
                  [newv2]               "r" (newv2),
@@ -532,8 +532,8 @@ int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
                "5:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* cmp2 input */
                  [v2]                  "m" (*v2),
                  [expect2]             "r" (expect2),
@@ -649,8 +649,8 @@ int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
                "8:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),
@@ -771,8 +771,8 @@ int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
                "8:\n\t"
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),

diff --git a/tools/testing/selftests/rseq/rseq-ppc.h b/tools/testing/selftests/rseq/rseq-ppc.h
index 76be90196fe4f1fc09038b5f1a19fa93af91793c..2e6b7572ba080084a3aefac9d3f1f1c75d2a1d2f 100644 (file)
--- a/tools/testing/selftests/rseq/rseq-ppc.h
+++ b/tools/testing/selftests/rseq/rseq-ppc.h
@@ -235,8 +235,8 @@ int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),
                  [newv]                "r" (newv)
@@ -301,8 +301,8 @@ int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expectnot]           "r" (expectnot),
@@ -359,8 +359,8 @@ int rseq_addv(intptr_t *v, intptr_t count, int cpu)
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [count]               "r" (count)
@@ -419,8 +419,8 @@ int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* try store input */
                  [v2]                  "m" (*v2),
                  [newv2]               "r" (newv2),
@@ -489,8 +489,8 @@ int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* try store input */
                  [v2]                  "m" (*v2),
                  [newv2]               "r" (newv2),
@@ -560,8 +560,8 @@ int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* cmp2 input */
                  [v2]                  "m" (*v2),
                  [expect2]             "r" (expect2),
@@ -635,8 +635,8 @@ int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),
@@ -711,8 +711,8 @@ int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),

diff --git a/tools/testing/selftests/rseq/rseq-s390.h b/tools/testing/selftests/rseq/rseq-s390.h
index 8ef94ad1cbb45224f7eef950a9d51a3e4816f1cf..b906e044d2a3480db9250e0116a7fb8cc8129dd2 100644 (file)
--- a/tools/testing/selftests/rseq/rseq-s390.h
+++ b/tools/testing/selftests/rseq/rseq-s390.h
@@ -165,8 +165,8 @@ int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),
                  [newv]                "r" (newv)
@@ -233,8 +233,8 @@ int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expectnot]           "r" (expectnot),
@@ -288,8 +288,8 @@ int rseq_addv(intptr_t *v, intptr_t count, int cpu)
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [count]               "r" (count)
@@ -347,8 +347,8 @@ int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* try store input */
                  [v2]                  "m" (*v2),
                  [newv2]               "r" (newv2),
@@ -426,8 +426,8 @@ int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* cmp2 input */
                  [v2]                  "m" (*v2),
                  [expect2]             "r" (expect2),
@@ -534,8 +534,8 @@ int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
 #endif
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [current_cpu_id]      "m" (__rseq_abi.cpu_id),
-                 [rseq_cs]             "m" (__rseq_abi.rseq_cs),
+                 [current_cpu_id]      "m" (rseq_get_abi()->cpu_id),
+                 [rseq_cs]             "m" (rseq_get_abi()->rseq_cs),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),

diff --git a/tools/testing/selftests/rseq/rseq-x86.h b/tools/testing/selftests/rseq/rseq-x86.h
index 640411518e4664aae241d9abdc2ea277470c2789..1d9fa0516e5365cbafaf5be5b9251e6ca49b101a 100644 (file)
--- a/tools/testing/selftests/rseq/rseq-x86.h
+++ b/tools/testing/selftests/rseq/rseq-x86.h
@@ -141,7 +141,7 @@ int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),
                  [newv]                "r" (newv)
@@ -207,7 +207,7 @@ int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expectnot]           "r" (expectnot),
@@ -258,7 +258,7 @@ int rseq_addv(intptr_t *v, intptr_t count, int cpu)
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* final store input */
                  [v]                   "m" (*v),
                  [count]               "er" (count)
@@ -314,7 +314,7 @@ int rseq_offset_deref_addv(intptr_t *ptr, off_t off, intptr_t inc, int cpu)
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* final store input */
                  [ptr]                 "m" (*ptr),
                  [off]                 "er" (off),
@@ -372,7 +372,7 @@ int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* try store input */
                  [v2]                  "m" (*v2),
                  [newv2]               "r" (newv2),
@@ -449,7 +449,7 @@ int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* cmp2 input */
                  [v2]                  "m" (*v2),
                  [expect2]             "r" (expect2),
@@ -555,7 +555,7 @@ int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
 #endif
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),
@@ -719,7 +719,7 @@ int rseq_cmpeqv_storev(intptr_t *v, intptr_t expect, intptr_t newv, int cpu)
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  [v]                   "m" (*v),
                  [expect]              "r" (expect),
                  [newv]                "r" (newv)
@@ -785,7 +785,7 @@ int rseq_cmpnev_storeoffp_load(intptr_t *v, intptr_t expectnot,
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expectnot]           "r" (expectnot),
@@ -836,7 +836,7 @@ int rseq_addv(intptr_t *v, intptr_t count, int cpu)
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* final store input */
                  [v]                   "m" (*v),
                  [count]               "ir" (count)
@@ -894,7 +894,7 @@ int rseq_cmpeqv_trystorev_storev(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* try store input */
                  [v2]                  "m" (*v2),
                  [newv2]               "m" (newv2),
@@ -962,7 +962,7 @@ int rseq_cmpeqv_trystorev_storev_release(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* try store input */
                  [v2]                  "m" (*v2),
                  [newv2]               "r" (newv2),
@@ -1032,7 +1032,7 @@ int rseq_cmpeqv_cmpeqv_storev(intptr_t *v, intptr_t expect,
                RSEQ_ASM_DEFINE_ABORT(4, "", abort)
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* cmp2 input */
                  [v2]                  "m" (*v2),
                  [expect2]             "r" (expect2),
@@ -1142,7 +1142,7 @@ int rseq_cmpeqv_trymemcpy_storev(intptr_t *v, intptr_t expect,
 #endif
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expect]              "m" (expect),
@@ -1255,7 +1255,7 @@ int rseq_cmpeqv_trymemcpy_storev_release(intptr_t *v, intptr_t expect,
 #endif
                : /* gcc asm goto does not allow outputs */
                : [cpu_id]              "r" (cpu),
-                 [rseq_abi]            "r" (&__rseq_abi),
+                 [rseq_abi]            "r" (rseq_get_abi()),
                  /* final store input */
                  [v]                   "m" (*v),
                  [expect]              "m" (expect),

diff --git a/tools/testing/selftests/rseq/rseq.h b/tools/testing/selftests/rseq/rseq.h
index d580f8e9c0012073416f5aa241cf8d2184f52216..ca668a2af1729f15f75364403c2fe0ea3ca7f0d2 100644 (file)
--- a/tools/testing/selftests/rseq/rseq.h
+++ b/tools/testing/selftests/rseq/rseq.h
@@ -46,6 +46,11 @@
 extern __thread struct rseq_abi __rseq_abi;
 extern int __rseq_handled;
 
+static inline struct rseq_abi *rseq_get_abi(void)
+{
+       return &__rseq_abi;
+}
+
 #define rseq_likely(x)         __builtin_expect(!!(x), 1)
 #define rseq_unlikely(x)       __builtin_expect(!!(x), 0)
 #define rseq_barrier()         __asm__ __volatile__("" : : : "memory")
@@ -108,7 +113,7 @@ int32_t rseq_fallback_current_cpu(void);
  */
 static inline int32_t rseq_current_cpu_raw(void)
 {
-       return RSEQ_ACCESS_ONCE(__rseq_abi.cpu_id);
+       return RSEQ_ACCESS_ONCE(rseq_get_abi()->cpu_id);
 }
 
 /*
@@ -124,7 +129,7 @@ static inline int32_t rseq_current_cpu_raw(void)
  */
 static inline uint32_t rseq_cpu_start(void)
 {
-       return RSEQ_ACCESS_ONCE(__rseq_abi.cpu_id_start);
+       return RSEQ_ACCESS_ONCE(rseq_get_abi()->cpu_id_start);
 }
 
 static inline uint32_t rseq_current_cpu(void)
@@ -139,7 +144,7 @@ static inline uint32_t rseq_current_cpu(void)
 
 static inline void rseq_clear_rseq_cs(void)
 {
-       RSEQ_WRITE_ONCE(__rseq_abi.rseq_cs.arch.ptr, 0);
+       RSEQ_WRITE_ONCE(rseq_get_abi()->rseq_cs.arch.ptr, 0);
 }
 
 /*