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selftests/rseq: Introduce rseq_get_abi() helper

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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
This commit is contained in:
Mathieu Desnoyers 2022-01-24 12:12:43 -05:00 committed by Peter Zijlstra
parent 94b80a19eb
commit e546cd48cc
7 changed files with 99 additions and 94 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

32
tools/testing/selftests/rseq/rseq-arm.h
View file

@ -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),

32
tools/testing/selftests/rseq/rseq-arm64.h
View file

@ -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),

32
tools/testing/selftests/rseq/rseq-mips.h
View file

@ -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),

32
tools/testing/selftests/rseq/rseq-ppc.h
View file

@ -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),

24
tools/testing/selftests/rseq/rseq-s390.h
View file

@ -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),

30
tools/testing/selftests/rseq/rseq-x86.h
View file

@ -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),

11
tools/testing/selftests/rseq/rseq.h
View file

@ -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);
}
/*