On Tue, Jan 14, 2020 at 2:47 AM Palmer Dabbelt <palmerdabbelt@xxxxxxxxxx> wrote: > > On Mon, 04 Nov 2019 17:58:31 PST (-0800), vincent.chen@xxxxxxxxxx wrote: > > Add RSEQ, restartable sequence, support and related selftest to RISCV. > > The Kconfig option HAVE_REGS_AND_STACK_ACCESS_API is also required by > > RSEQ because RSEQ will modify the content of pt_regs.sepc through > > instruction_pointer_set() during the fixup procedure. In order to select > > the config HAVE_REGS_AND_STACK_ACCESS_API, the missing APIs for accessing > > pt_regs are also added in this patch set. > > > > The relevant RSEQ tests in kselftest require the Binutils patch "RISC-V: > > Fix linker problems with TLS copy relocs" to avoid placing > > PREINIT_ARRAY and TLS variable of librseq.so at the same address. > > https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=3e7bd7f24146f162565edf878840449f36a8d974 > > A segmental fault will happen if the Binutils misses this patch. > > > > > > > > Vincent Chen (3): > > riscv: add required functions to enable HAVE_REGS_AND_STACK_ACCESS_API > > riscv: Add support for restartable sequence > > rseq/selftests: Add support for riscv > > > > arch/riscv/Kconfig | 2 + > > arch/riscv/include/asm/ptrace.h | 29 +- > > arch/riscv/kernel/entry.S | 4 + > > arch/riscv/kernel/ptrace.c | 99 +++++ > > arch/riscv/kernel/signal.c | 3 + > > tools/testing/selftests/rseq/param_test.c | 23 ++ > > tools/testing/selftests/rseq/rseq-riscv.h | 622 ++++++++++++++++++++++++++++++ > > tools/testing/selftests/rseq/rseq.h | 2 + > > 8 files changed, 783 insertions(+), 1 deletion(-) > > create mode 100644 tools/testing/selftests/rseq/rseq-riscv.h > > This, with Paul's updated patch 1, isn't building on my end: > > In file included from <command-line>: > arch/riscv/kernel/ptrace.c:137:18: error: ‘struct pt_regs’ has no member named ‘sepc’; did you mean ‘epc’? > REG_OFFSET_NAME(sepc), > ^~~~ > ././include/linux/compiler_types.h:129:57: note: in definition of macro ‘__compiler_offsetof’ > #define __compiler_offsetof(a, b) __builtin_offsetof(a, b) > ^ > arch/riscv/kernel/ptrace.c:133:51: note: in expansion of macro ‘offsetof’ > #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)} > ^~~~~~~~ > arch/riscv/kernel/ptrace.c:137:2: note: in expansion of macro ‘REG_OFFSET_NAME’ > REG_OFFSET_NAME(sepc), > ^~~~~~~~~~~~~~~ > arch/riscv/kernel/ptrace.c:169:18: error: ‘struct pt_regs’ has no member named ‘sstatus’; did you mean ‘status’? > REG_OFFSET_NAME(sstatus), > ^~~~~~~ > ././include/linux/compiler_types.h:129:57: note: in definition of macro ‘__compiler_offsetof’ > #define __compiler_offsetof(a, b) __builtin_offsetof(a, b) > ^ > arch/riscv/kernel/ptrace.c:133:51: note: in expansion of macro ‘offsetof’ > #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)} > ^~~~~~~~ > arch/riscv/kernel/ptrace.c:169:2: note: in expansion of macro ‘REG_OFFSET_NAME’ > REG_OFFSET_NAME(sstatus), > ^~~~~~~~~~~~~~~ > arch/riscv/kernel/ptrace.c:170:18: error: ‘struct pt_regs’ has no member named ‘sbadaddr’; did you mean ‘badaddr’? > REG_OFFSET_NAME(sbadaddr), > ^~~~~~~~ > ././include/linux/compiler_types.h:129:57: note: in definition of macro ‘__compiler_offsetof’ > #define __compiler_offsetof(a, b) __builtin_offsetof(a, b) > ^ > arch/riscv/kernel/ptrace.c:133:51: note: in expansion of macro ‘offsetof’ > #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)} > ^~~~~~~~ > arch/riscv/kernel/ptrace.c:170:2: note: in expansion of macro ‘REG_OFFSET_NAME’ > REG_OFFSET_NAME(sbadaddr), > ^~~~~~~~~~~~~~~ > arch/riscv/kernel/ptrace.c:171:18: error: ‘struct pt_regs’ has no member named ‘scause’; did you mean ‘cause’? > REG_OFFSET_NAME(scause), > ^~~~~~ > ././include/linux/compiler_types.h:129:57: note: in definition of macro ‘__compiler_offsetof’ > #define __compiler_offsetof(a, b) __builtin_offsetof(a, b) > ^ > arch/riscv/kernel/ptrace.c:133:51: note: in expansion of macro ‘offsetof’ > #define REG_OFFSET_NAME(r) {.name = #r, .offset = offsetof(struct pt_regs, r)} > ^~~~~~~~ > arch/riscv/kernel/ptrace.c:171:2: note: in expansion of macro ‘REG_OFFSET_NAME’ > REG_OFFSET_NAME(scause), Sorry, I really missed this email. I will fix these errors and resend this patch set. Thank you
