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commit 67e7b20eb256baec225b3d7df1f03d731bf5e939
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Author: Mark Wielaard <mark@klomp.org>
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Date: Fri Dec 10 17:41:59 2021 +0100
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Implement linux rseq syscall as ENOSYS
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This implements rseq for amd64, arm, arm64, ppc32, ppc64,
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s390x and x86 linux as ENOSYS (without warning).
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glibc will start using rseq to accelerate sched_getcpu, if
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available. This would cause a warning from valgrind every
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time a new thread is started.
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Real rseq (restartable sequences) support is pretty hard, so
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for now just explicitly return ENOSYS (just like we do for clone3).
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https://sourceware.org/pipermail/libc-alpha/2021-December/133656.html
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diff --git a/coregrind/m_syswrap/syswrap-amd64-linux.c b/coregrind/m_syswrap/syswrap-amd64-linux.c
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index 5062324a1..18b25f80a 100644
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--- a/coregrind/m_syswrap/syswrap-amd64-linux.c
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+++ b/coregrind/m_syswrap/syswrap-amd64-linux.c
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@@ -862,6 +862,8 @@ static SyscallTableEntry syscall_table[] = {
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LINXY(__NR_statx, sys_statx), // 332
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+ GENX_(__NR_rseq, sys_ni_syscall), // 334
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+
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LINX_(__NR_membarrier, sys_membarrier), // 324
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LINX_(__NR_copy_file_range, sys_copy_file_range), // 326
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diff --git a/coregrind/m_syswrap/syswrap-arm-linux.c b/coregrind/m_syswrap/syswrap-arm-linux.c
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index 556dd844b..d583cef0c 100644
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--- a/coregrind/m_syswrap/syswrap-arm-linux.c
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+++ b/coregrind/m_syswrap/syswrap-arm-linux.c
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@@ -1024,6 +1024,7 @@ static SyscallTableEntry syscall_main_table[] = {
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LINX_(__NR_pwritev2, sys_pwritev2), // 393
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LINXY(__NR_statx, sys_statx), // 397
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+ GENX_(__NR_rseq, sys_ni_syscall), // 398
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LINXY(__NR_clock_gettime64, sys_clock_gettime64), // 403
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LINX_(__NR_clock_settime64, sys_clock_settime64), // 404
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diff --git a/coregrind/m_syswrap/syswrap-arm64-linux.c b/coregrind/m_syswrap/syswrap-arm64-linux.c
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index b87107727..2066a38ea 100644
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--- a/coregrind/m_syswrap/syswrap-arm64-linux.c
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+++ b/coregrind/m_syswrap/syswrap-arm64-linux.c
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@@ -823,8 +823,9 @@ static SyscallTableEntry syscall_main_table[] = {
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// (__NR_pkey_mprotect, sys_ni_syscall), // 288
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// (__NR_pkey_alloc, sys_ni_syscall), // 289
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// (__NR_pkey_free, sys_ni_syscall), // 290
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+ LINXY(__NR_statx, sys_statx), // 291
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- LINXY(__NR_statx, sys_statx), // 397
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+ GENX_(__NR_rseq, sys_ni_syscall), // 293
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LINXY(__NR_io_uring_setup, sys_io_uring_setup), // 425
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LINXY(__NR_io_uring_enter, sys_io_uring_enter), // 426
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diff --git a/coregrind/m_syswrap/syswrap-ppc32-linux.c b/coregrind/m_syswrap/syswrap-ppc32-linux.c
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index 6263ab845..637b2504e 100644
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--- a/coregrind/m_syswrap/syswrap-ppc32-linux.c
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+++ b/coregrind/m_syswrap/syswrap-ppc32-linux.c
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@@ -1028,6 +1028,8 @@ static SyscallTableEntry syscall_table[] = {
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LINXY(__NR_statx, sys_statx), // 383
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+ GENX_(__NR_rseq, sys_ni_syscall), // 387
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+
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LINXY(__NR_clock_gettime64, sys_clock_gettime64), // 403
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LINX_(__NR_clock_settime64, sys_clock_settime64), // 404
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diff --git a/coregrind/m_syswrap/syswrap-ppc64-linux.c b/coregrind/m_syswrap/syswrap-ppc64-linux.c
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index a26b41c32..93956d3cc 100644
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--- a/coregrind/m_syswrap/syswrap-ppc64-linux.c
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+++ b/coregrind/m_syswrap/syswrap-ppc64-linux.c
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@@ -1019,6 +1019,8 @@ static SyscallTableEntry syscall_table[] = {
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LINXY(__NR_statx, sys_statx), // 383
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+ GENX_(__NR_rseq, sys_ni_syscall), // 387
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+
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LINXY(__NR_io_uring_setup, sys_io_uring_setup), // 425
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LINXY(__NR_io_uring_enter, sys_io_uring_enter), // 426
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LINXY(__NR_io_uring_register, sys_io_uring_register), // 427
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diff --git a/coregrind/m_syswrap/syswrap-s390x-linux.c b/coregrind/m_syswrap/syswrap-s390x-linux.c
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index 5c9209859..73f9684c4 100644
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--- a/coregrind/m_syswrap/syswrap-s390x-linux.c
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+++ b/coregrind/m_syswrap/syswrap-s390x-linux.c
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@@ -860,6 +860,8 @@ static SyscallTableEntry syscall_table[] = {
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LINXY(__NR_statx, sys_statx), // 379
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+ GENX_(__NR_rseq, sys_ni_syscall), // 381
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+
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LINXY(__NR_io_uring_setup, sys_io_uring_setup), // 425
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LINXY(__NR_io_uring_enter, sys_io_uring_enter), // 426
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LINXY(__NR_io_uring_register, sys_io_uring_register), // 427
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diff --git a/coregrind/m_syswrap/syswrap-x86-linux.c b/coregrind/m_syswrap/syswrap-x86-linux.c
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index 1d8f45d33..8662ff501 100644
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--- a/coregrind/m_syswrap/syswrap-x86-linux.c
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+++ b/coregrind/m_syswrap/syswrap-x86-linux.c
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@@ -1619,6 +1619,8 @@ static SyscallTableEntry syscall_table[] = {
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/* Explicitly not supported on i386 yet. */
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GENX_(__NR_arch_prctl, sys_ni_syscall), // 384
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+ GENX_(__NR_rseq, sys_ni_syscall), // 386
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+
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LINXY(__NR_clock_gettime64, sys_clock_gettime64), // 403
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LINX_(__NR_clock_settime64, sys_clock_settime64), // 404
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diff --git a/include/vki/vki-scnums-arm-linux.h b/include/vki/vki-scnums-arm-linux.h
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index ff560e19d..485db8b26 100644
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--- a/include/vki/vki-scnums-arm-linux.h
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+++ b/include/vki/vki-scnums-arm-linux.h
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@@ -432,6 +432,7 @@
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#define __NR_pkey_alloc 395
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#define __NR_pkey_free 396
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#define __NR_statx 397
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+#define __NR_rseq 398
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diff --git a/include/vki/vki-scnums-arm64-linux.h b/include/vki/vki-scnums-arm64-linux.h
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index 9aa3b2b5f..acdfb39c6 100644
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--- a/include/vki/vki-scnums-arm64-linux.h
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+++ b/include/vki/vki-scnums-arm64-linux.h
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@@ -323,9 +323,11 @@
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#define __NR_pkey_alloc 289
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#define __NR_pkey_free 290
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#define __NR_statx 291
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+#define __NR_io_pgetevents 291
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+#define __NR_rseq 293
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#undef __NR_syscalls
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-#define __NR_syscalls 292
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+#define __NR_syscalls 294
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///*
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// * All syscalls below here should go away really,
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diff --git a/include/vki/vki-scnums-ppc32-linux.h b/include/vki/vki-scnums-ppc32-linux.h
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index 6987ad941..08fa77df0 100644
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--- a/include/vki/vki-scnums-ppc32-linux.h
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+++ b/include/vki/vki-scnums-ppc32-linux.h
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@@ -415,6 +415,7 @@
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#define __NR_pkey_alloc 384
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#define __NR_pkey_free 385
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#define __NR_pkey_mprotect 386
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+#define __NR_rseq 387
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#endif /* __VKI_SCNUMS_PPC32_LINUX_H */
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diff --git a/include/vki/vki-scnums-ppc64-linux.h b/include/vki/vki-scnums-ppc64-linux.h
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index 6827964fd..a76fa6d32 100644
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--- a/include/vki/vki-scnums-ppc64-linux.h
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+++ b/include/vki/vki-scnums-ppc64-linux.h
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@@ -407,6 +407,7 @@
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#define __NR_pkey_alloc 384
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#define __NR_pkey_free 385
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#define __NR_pkey_mprotect 386
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+#define __NR_rseq 387
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#endif /* __VKI_SCNUMS_PPC64_LINUX_H */
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diff --git a/include/vki/vki-scnums-s390x-linux.h b/include/vki/vki-scnums-s390x-linux.h
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index 6487e20c9..869c04584 100644
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--- a/include/vki/vki-scnums-s390x-linux.h
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+++ b/include/vki/vki-scnums-s390x-linux.h
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@@ -342,8 +342,11 @@
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#define __NR_s390_guarded_storage 378
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#define __NR_statx 379
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#define __NR_s390_sthyi 380
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+#define __NR_kexec_file_load 381
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+#define __NR_io_pgetevents 382
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+#define __NR_rseq 383
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-#define NR_syscalls 381
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+#define NR_syscalls 384
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/*
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* There are some system calls that are not present on 64 bit, some
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