git: 4d9000cb22a9 - stable/13 - dtrace: expose dtrace_instr_size() to userland and implement it for riscv
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Date: Sun, 07 May 2023 17:59:53 UTC
The branch stable/13 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=4d9000cb22a9b17df4815df5f34773cf8862383a commit 4d9000cb22a9b17df4815df5f34773cf8862383a Author: Christos Margiolis <christos@FreeBSD.org> AuthorDate: 2023-04-20 16:21:46 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2023-05-07 17:54:08 +0000 dtrace: expose dtrace_instr_size() to userland and implement it for riscv dtrace_instr_size() is needed by the forthcoming RISC-V port of kinst, as well as by libdtrace in D38825 for both amd64 and RISC-V. Reviewed by: markj, mhorne MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D39489 (cherry picked from commit 080e56a6c98c7e7a241a4260d4c19d3cad5b22af) --- cddl/lib/libdtrace/Makefile | 6 +++++- .../contrib/opensolaris/uts/common/sys/dtrace.h | 5 ++++- sys/cddl/dev/dtrace/riscv/instr_size.c | 22 ++++++++++++++++++++++ sys/modules/dtrace/dtrace/Makefile | 4 ++++ 4 files changed, 35 insertions(+), 2 deletions(-) diff --git a/cddl/lib/libdtrace/Makefile b/cddl/lib/libdtrace/Makefile index 05b183215f4c..3fb0ec0bafb0 100644 --- a/cddl/lib/libdtrace/Makefile +++ b/cddl/lib/libdtrace/Makefile @@ -125,10 +125,14 @@ CFLAGS+= -I${OPENSOLARIS_SYS_DISTDIR}/uts/intel .endif .if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "amd64" -SRCS+= dis_tables.c +SRCS+= dis_tables.c instr_size.c DSRCS+= regs_x86.d .endif +.if ${MACHINE_CPUARCH} == "riscv" +SRCS+= instr_size.c +.endif + YFLAGS+=-d LIBADD= ctf elf proc pthread rtld_db diff --git a/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h b/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h index d3d8fbca6164..7b8da08e9ae9 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h +++ b/sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h @@ -2399,7 +2399,6 @@ extern void dtrace_safe_synchronous_signal(void); extern int dtrace_mach_aframes(void); #if defined(__i386) || defined(__amd64) -extern int dtrace_instr_size(uint8_t *instr); extern int dtrace_instr_size_isa(uint8_t *, model_t, int *); extern void dtrace_invop_callsite(void); #endif @@ -2428,6 +2427,10 @@ extern void dtrace_helpers_destroy(proc_t *); #endif /* _KERNEL */ +#if defined(__i386) || defined(__amd64) || defined (__riscv) +extern int dtrace_instr_size(uint8_t *instr); +#endif + #endif /* _ASM */ #if defined(__i386) || defined(__amd64) diff --git a/sys/cddl/dev/dtrace/riscv/instr_size.c b/sys/cddl/dev/dtrace/riscv/instr_size.c new file mode 100644 index 000000000000..bfdc962f4aa9 --- /dev/null +++ b/sys/cddl/dev/dtrace/riscv/instr_size.c @@ -0,0 +1,22 @@ +/* + * SPDX-License-Identifier: CDDL 1.0 + * + * Copyright 2023 Christos Margiolis <christos@FreeBSD.org> + */ + +#include <sys/types.h> +#include <sys/dtrace.h> + +#include <machine/riscvreg.h> + +#define RVC_MASK 0x03 + +int +dtrace_instr_size(uint8_t *instr) +{ + /* Detect compressed instructions. */ + if ((~(*instr) & RVC_MASK) == 0) + return (INSN_SIZE); + else + return (INSN_C_SIZE); +} diff --git a/sys/modules/dtrace/dtrace/Makefile b/sys/modules/dtrace/dtrace/Makefile index 0bd81bb39db0..1513418281ad 100644 --- a/sys/modules/dtrace/dtrace/Makefile +++ b/sys/modules/dtrace/dtrace/Makefile @@ -22,8 +22,12 @@ SRCS+= dis_tables.c \ instr_size.c CFLAGS+= -I${SYSDIR}/cddl/contrib/opensolaris/uts/intel \ -I${SYSDIR}/cddl/dev/dtrace/x86 +.endif +.if ${MACHINE_CPUARCH} == "riscv" +SRCS+= instr_size.c .endif + CFLAGS+= ${OPENZFS_CFLAGS} SRCS+= bus_if.h device_if.h vnode_if.h