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Add initial DTrace support for RISC-V.

Browse Source 
Sponsored by:	DARPA, AFRL
Sponsored by:	HEIF5
This commit is contained in:
Ruslan Bukin 2016-05-24 16:41:37 +00:00
parent fa851a8bfb
commit fed1ca4b71
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=300618
21 changed files with 1383 additions and 6 deletions
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15
cddl/contrib/opensolaris/lib/libdtrace/common/dt_link.c
View File

@ -250,6 +250,9 @@ printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__);
dofr[j].dofr_offset + 4;
rel->r_info = ELF32_R_INFO(count + dep->de_global,
R_PPC_REL32);
#elif defined(__riscv__)
/* XXX */
printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__);
#elif defined(__sparc)
/*
* Add 4 bytes to hit the low half of this 64-bit
@ -440,6 +443,8 @@ prepare_elf64(dtrace_hdl_t *dtp, const dof_hdr_t *dof, dof_elf64_t *dep)
dofr[j].dofr_offset;
rel->r_info = ELF64_R_INFO(count + dep->de_global,
R_PPC64_REL64);
#elif defined(__riscv__)
/* XXX */
#elif defined(__i386) || defined(__amd64)
rel->r_offset = s->dofs_offset +
dofr[j].dofr_offset;
@ -935,7 +940,15 @@ dt_modtext(dtrace_hdl_t *dtp, char *p, int isenabled, GElf_Rela *rela,
return (0);
}
#elif defined(__riscv__)
/* XXX */
static int
dt_modtext(dtrace_hdl_t *dtp, char *p, int isenabled, GElf_Rela *rela,
uint32_t *off)
{
printf("%s:%s(%d): DOODAD\n",__FUNCTION__,__FILE__,__LINE__);
return (0);
}
#elif defined(__sparc)
#define DT_OP_RET 0x81c7e008

3
cddl/contrib/opensolaris/lib/libdtrace/common/dt_printf.c
View File

@ -310,7 +310,8 @@ pfprint_fp(dtrace_hdl_t *dtp, FILE *fp, const char *format,
case sizeof (double):
return (dt_printf(dtp, fp, format,
*((double *)addr) / n));
#if !defined(__arm__) && !defined(__powerpc__) && !defined(__mips__)
#if !defined(__arm__) && !defined(__powerpc__) && \
!defined(__mips__) && !defined(__riscv__)
case sizeof (long double):
return (dt_printf(dtp, fp, format,
*((long double *)addr) / ldn));

139
cddl/contrib/opensolaris/lib/libdtrace/riscv/dt_isadep.c Normal file
View File

@ -0,0 +1,139 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
* Copyright 2014 Howard Su
* Copyright 2015 George V. Neville-Neil
* Copyright 2015 Ruslan Bukin <br@bsdpad.com>
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <stdlib.h>
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <libgen.h>
#include <dt_impl.h>
#include <dt_pid.h>
#if !defined(sun)
#include <libproc_compat.h>
#endif
/*ARGSUSED*/
int
dt_pid_create_entry_probe(struct ps_prochandle *P, dtrace_hdl_t *dtp,
fasttrap_probe_spec_t *ftp, const GElf_Sym *symp)
{
ftp->ftps_type = DTFTP_ENTRY;
ftp->ftps_pc = (uintptr_t)symp->st_value;
ftp->ftps_size = (size_t)symp->st_size;
ftp->ftps_noffs = 1;
ftp->ftps_offs[0] = 0;
if (ioctl(dtp->dt_ftfd, FASTTRAPIOC_MAKEPROBE, ftp) != 0) {
dt_dprintf("fasttrap probe creation ioctl failed: %s\n",
strerror(errno));
return (dt_set_errno(dtp, errno));
}
return (1);
}
int
dt_pid_create_return_probe(struct ps_prochandle *P, dtrace_hdl_t *dtp,
fasttrap_probe_spec_t *ftp, const GElf_Sym *symp, uint64_t *stret)
{
dt_dprintf("%s: unimplemented\n", __func__);
return (DT_PROC_ERR);
}
/*ARGSUSED*/
int
dt_pid_create_offset_probe(struct ps_prochandle *P, dtrace_hdl_t *dtp,
fasttrap_probe_spec_t *ftp, const GElf_Sym *symp, ulong_t off)
{
if (!ALIGNED_POINTER(off, 4))
return (DT_PROC_ALIGN);
ftp->ftps_type = DTFTP_OFFSETS;
ftp->ftps_pc = (uintptr_t)symp->st_value;
ftp->ftps_size = (size_t)symp->st_size;
ftp->ftps_noffs = 1;
ftp->ftps_offs[0] = off;
if (ioctl(dtp->dt_ftfd, FASTTRAPIOC_MAKEPROBE, ftp) != 0) {
dt_dprintf("fasttrap probe creation ioctl failed: %s\n",
strerror(errno));
return (dt_set_errno(dtp, errno));
}
return (1);
}
/*ARGSUSED*/
int
dt_pid_create_glob_offset_probes(struct ps_prochandle *P, dtrace_hdl_t *dtp,
fasttrap_probe_spec_t *ftp, const GElf_Sym *symp, const char *pattern)
{
ulong_t i;
ftp->ftps_type = DTFTP_OFFSETS;
ftp->ftps_pc = (uintptr_t)symp->st_value;
ftp->ftps_size = (size_t)symp->st_size;
ftp->ftps_noffs = 0;
/*
* If we're matching against everything, just iterate through each
* instruction in the function, otherwise look for matching offset
* names by constructing the string and comparing it against the
* pattern.
*/
if (strcmp("*", pattern) == 0) {
for (i = 0; i < symp->st_size; i += 4) {
ftp->ftps_offs[ftp->ftps_noffs++] = i;
}
} else {
char name[sizeof (i) * 2 + 1];
for (i = 0; i < symp->st_size; i += 4) {
(void) sprintf(name, "%lx", i);
if (gmatch(name, pattern))
ftp->ftps_offs[ftp->ftps_noffs++] = i;
}
}
if (ioctl(dtp->dt_ftfd, FASTTRAPIOC_MAKEPROBE, ftp) != 0) {
dt_dprintf("fasttrap probe creation ioctl failed: %s\n",
strerror(errno));
return (dt_set_errno(dtp, errno));
}
return (ftp->ftps_noffs);
}

2
cddl/lib/Makefile
View File

@ -26,7 +26,7 @@ _libzpool= libzpool
.endif
.endif
.if ${MACHINE_CPUARCH} != "sparc64" && ${MACHINE_CPUARCH} != "riscv"
.if ${MACHINE_CPUARCH} != "sparc64"
_drti= drti
_libdtrace= libdtrace
.endif

4
cddl/lib/libdtrace/Makefile
View File

@ -95,6 +95,10 @@ CFLAGS+= -I${OPENSOLARIS_SYS_DISTDIR}/uts/mips
CFLAGS+= -I${OPENSOLARIS_SYS_DISTDIR}/uts/powerpc
.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/powerpc
.PATH: ${.CURDIR}/../../../sys/cddl/dev/dtrace/powerpc
.elif ${MACHINE_CPUARCH} == "riscv"
CFLAGS+= -I${OPENSOLARIS_SYS_DISTDIR}/uts/riscv
.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/riscv
.PATH: ${.CURDIR}/../../../sys/cddl/dev/dtrace/riscv
.elif ${MACHINE_CPUARCH} == "sparc64"
CFLAGS+= -I${OPENSOLARIS_SYS_DISTDIR}/uts/sparc
.PATH: ${.CURDIR}/../../../cddl/contrib/opensolaris/lib/libdtrace/sparc

3
cddl/usr.sbin/Makefile
View File

@ -26,7 +26,8 @@ _lockstat= lockstat
_plockstat= plockstat
.endif
.if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "arm"
.if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "arm" || \
${MACHINE_CPUARCH} == "riscv"
_dtrace= dtrace
_lockstat= lockstat
.endif

2
sys/cddl/contrib/opensolaris/uts/common/dtrace/dtrace.c
View File

@ -12026,7 +12026,7 @@ dtrace_buffer_alloc(dtrace_buffer_t *bufs, size_t size, int flags,
*factor = 1;
#if defined(__aarch64__) || defined(__amd64__) || defined(__arm__) || \
defined(__mips__) || defined(__powerpc__)
defined(__mips__) || defined(__powerpc__) || defined(__riscv__)
/*
* FreeBSD isn't good at limiting the amount of memory we
* ask to malloc, so let's place a limit here before trying

10
sys/cddl/contrib/opensolaris/uts/common/sys/dtrace.h
View File

@ -2495,6 +2495,16 @@ extern void dtrace_helpers_destroy(proc_t *);
#define DTRACE_INVOP_SD 1
#define DTRACE_INVOP_LD 2
#elif defined(__riscv__)
#define SD_RA_SP_MASK 0x1fff07f
#define SD_RA_SP 0x0113023
#define DTRACE_INVOP_SD 1
#define DTRACE_INVOP_RET 2
#define DTRACE_INVOP_NOP 3
#endif
#ifdef __cplusplus

29
sys/cddl/contrib/opensolaris/uts/riscv/dtrace/fasttrap_isa.c Normal file
View File

@ -0,0 +1,29 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* XXX: Placeholder for RISC-V fasttrap code
*/

46
sys/cddl/contrib/opensolaris/uts/riscv/sys/fasttrap_isa.h Normal file
View File

@ -0,0 +1,46 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _FASTTRAP_ISA_H
#define _FASTTRAP_ISA_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef uint32_t fasttrap_instr_t;
/* XXX: Place for RISC-V fasttrap headers */
#ifdef __cplusplus
}
#endif
#endif /* _FASTTRAP_ISA_H */

176
sys/cddl/dev/dtrace/riscv/dtrace_asm.S Normal file
View File

@ -0,0 +1,176 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* Portions Copyright 2016 Ruslan Bukin <br@bsdpad.com>
*
* $FreeBSD$
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#define _ASM
#define _LOCORE
#include <sys/cpuvar_defs.h>
#include <sys/dtrace.h>
#include <machine/riscvreg.h>
#include <machine/asm.h>
#include "assym.s"
/*
void dtrace_membar_producer(void)
*/
ENTRY(dtrace_membar_producer)
RET
END(dtrace_membar_producer)
/*
void dtrace_membar_consumer(void)
*/
ENTRY(dtrace_membar_consumer)
RET
END(dtrace_membar_consumer)
/*
dtrace_icookie_t dtrace_interrupt_disable(void)
*/
ENTRY(dtrace_interrupt_disable)
csrci sstatus, 1
RET
END(dtrace_interrupt_disable)
/*
void dtrace_interrupt_enable(dtrace_icookie_t cookie)
*/
ENTRY(dtrace_interrupt_enable)
csrsi sstatus, 1
RET
END(dtrace_interrupt_enable)
/*
uint8_t
dtrace_fuword8_nocheck(void *addr)
*/
ENTRY(dtrace_fuword8_nocheck)
lb a0, 0(a0)
RET
END(dtrace_fuword8_nocheck)
/*
uint16_t
dtrace_fuword16_nocheck(void *addr)
*/
ENTRY(dtrace_fuword16_nocheck)
lh a0, 0(a0)
RET
END(dtrace_fuword16_nocheck)
/*
uint32_t
dtrace_fuword32_nocheck(void *addr)
*/
ENTRY(dtrace_fuword32_nocheck)
lw a0, 0(a0)
RET
END(dtrace_fuword32_nocheck)
/*
uint64_t
dtrace_fuword64_nocheck(void *addr)
*/
ENTRY(dtrace_fuword64_nocheck)
ld a0, 0(a0)
RET
END(dtrace_fuword64_nocheck)
/*
void
dtrace_copy(uintptr_t uaddr, uintptr_t kaddr, size_t size)
*/
ENTRY(dtrace_copy)
beqz a2, 2f /* If len == 0 then skip loop */
1:
lb a4, 0(a0) /* Load from uaddr */
addi a0, a0, 1
sb a4, 0(a1) /* Store in kaddr */
addi a1, a1, 1
addi a2, a2, -1 /* len-- */
bnez a2, 1b
2:
RET
END(dtrace_copy)
/*
void
dtrace_copystr(uintptr_t uaddr, uintptr_t kaddr, size_t size,
volatile uint16_t *flags)
XXX: Check for flags?
*/
ENTRY(dtrace_copystr)
beqz a2, 2f /* If len == 0 then skip loop */
lb a4, 0(a0) /* Load from uaddr */
addi a0, a0, 1
sb a4, 0(a1) /* Store in kaddr */
addi a1, a1, 1
beqz a4, 2f /* If == 0 then break */
addi a2, a2, -1 /* len-- */
bnez a2, 1b
2:
RET
END(dtrace_copystr)
/*
uintptr_t
dtrace_caller(int aframes)
*/
ENTRY(dtrace_caller)
li a0, -1
RET
END(dtrace_caller)
/*
uint32_t
dtrace_cas32(uint32_t *target, uint32_t cmp, uint32_t new)
*/
ENTRY(dtrace_cas32)
1: lr.w a3, 0(a0) /* Load target */
bne a3, a1, 2f /* *target != cmp ? return */
sc.w a4, a2, 0(a0) /* Store new to target */
bnez a4, 1b /* Try again if store not succeed */
2: mv a0, a3 /* Return the value loaded from target */
RET
END(dtrace_cas32)
/*
void *
dtrace_casptr(volatile void *target, volatile void *cmp, volatile void *new)
*/
ENTRY(dtrace_casptr)
1: lr.d a3, 0(a0) /* Load target */
bne a3, a1, 2f /* *target != cmp ? return */
sc.d a4, a2, 0(a0) /* Store new to target */
bnez a4, 1b /* Try again if store not succeed */
2: mv a0, a3 /* Return the value loaded from target */
RET
END(dtrace_casptr)

394
sys/cddl/dev/dtrace/riscv/dtrace_isa.c Normal file
View File

@ -0,0 +1,394 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* Portions Copyright 2016 Ruslan Bukin <br@bsdpad.com>
*
* $FreeBSD$
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/stack.h>
#include <sys/pcpu.h>
#include <machine/frame.h>
#include <machine/md_var.h>
#include <machine/reg.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <machine/atomic.h>
#include <machine/db_machdep.h>
#include <machine/md_var.h>
#include <machine/stack.h>
#include <ddb/db_sym.h>
#include <ddb/ddb.h>
#include <sys/kdb.h>
#include "regset.h"
/*
* Wee need some reasonable default to prevent backtrace code
* from wandering too far
*/
#define MAX_FUNCTION_SIZE 0x10000
#define MAX_PROLOGUE_SIZE 0x100
#define MAX_USTACK_DEPTH 2048
uint8_t dtrace_fuword8_nocheck(void *);
uint16_t dtrace_fuword16_nocheck(void *);
uint32_t dtrace_fuword32_nocheck(void *);
uint64_t dtrace_fuword64_nocheck(void *);
void
dtrace_getpcstack(pc_t *pcstack, int pcstack_limit, int aframes,
uint32_t *intrpc)
{
struct unwind_state state;
int scp_offset;
register_t sp;
int depth;
depth = 0;
if (intrpc != 0) {
pcstack[depth++] = (pc_t) intrpc;
}
aframes++;
__asm __volatile("mv %0, sp" : "=&r" (sp));
state.fp = (uint64_t)__builtin_frame_address(0);
state.sp = sp;
state.pc = (uint64_t)dtrace_getpcstack;
while (depth < pcstack_limit) {
if (unwind_frame(&state))
break;
if (!INKERNEL(state.pc) || !INKERNEL(state.fp))
break;
/*
* NB: Unlike some other architectures, we don't need to
* explicitly insert cpu_dtrace_caller as it appears in the
* normal kernel stack trace rather than a special trap frame.
*/
if (aframes > 0) {
aframes--;
} else {
pcstack[depth++] = state.pc;
}
}
for (; depth < pcstack_limit; depth++) {
pcstack[depth] = 0;
}
}
static int
dtrace_getustack_common(uint64_t *pcstack, int pcstack_limit, uintptr_t pc,
uintptr_t fp)
{
volatile uint16_t *flags;
uintptr_t oldfp;
int ret;
ret = 0;
flags = (volatile uint16_t *)&cpu_core[curcpu].cpuc_dtrace_flags;
ASSERT(pcstack == NULL || pcstack_limit > 0);
while (pc != 0) {
/*
* We limit the number of times we can go around this
* loop to account for a circular stack.
*/
if (ret++ >= MAX_USTACK_DEPTH) {
*flags |= CPU_DTRACE_BADSTACK;
cpu_core[curcpu].cpuc_dtrace_illval = fp;
break;
}
if (pcstack != NULL) {
*pcstack++ = (uint64_t)pc;
pcstack_limit--;
if (pcstack_limit <= 0)
break;
}
if (fp == 0)
break;
pc = dtrace_fuword64((void *)(fp +
offsetof(struct riscv_frame, f_retaddr)));
fp = dtrace_fuword64((void *)fp);
if (fp == oldfp) {
*flags |= CPU_DTRACE_BADSTACK;
cpu_core[curcpu].cpuc_dtrace_illval = fp;
break;
}
}
return (ret);
}
void
dtrace_getupcstack(uint64_t *pcstack, int pcstack_limit)
{
volatile uint16_t *flags;
struct trapframe *tf;
uintptr_t pc, sp, fp;
proc_t *p;
int n;
p = curproc;
flags = (volatile uint16_t *)&cpu_core[curcpu].cpuc_dtrace_flags;
if (*flags & CPU_DTRACE_FAULT)
return;
if (pcstack_limit <= 0)
return;
/*
* If there's no user context we still need to zero the stack.
*/
if (p == NULL || (tf = curthread->td_frame) == NULL)
goto zero;
*pcstack++ = (uint64_t)p->p_pid;
pcstack_limit--;
if (pcstack_limit <= 0)
return;
pc = tf->tf_sepc;
sp = tf->tf_sp;
fp = tf->tf_s[0];
if (DTRACE_CPUFLAG_ISSET(CPU_DTRACE_ENTRY)) {
/*
* In an entry probe. The frame pointer has not yet been
* pushed (that happens in the function prologue). The
* best approach is to add the current pc as a missing top
* of stack and back the pc up to the caller, which is stored
* at the current stack pointer address since the call
* instruction puts it there right before the branch.
*/
*pcstack++ = (uint64_t)pc;
pcstack_limit--;
if (pcstack_limit <= 0)
return;
pc = tf->tf_ra;
}
n = dtrace_getustack_common(pcstack, pcstack_limit, pc, fp);
ASSERT(n >= 0);
ASSERT(n <= pcstack_limit);
pcstack += n;
pcstack_limit -= n;
zero:
while (pcstack_limit-- > 0)
*pcstack++ = 0;
}
int
dtrace_getustackdepth(void)
{
printf("IMPLEMENT ME: %s\n", __func__);
return (0);
}
void
dtrace_getufpstack(uint64_t *pcstack, uint64_t *fpstack, int pcstack_limit)
{
printf("IMPLEMENT ME: %s\n", __func__);
}
/*ARGSUSED*/
uint64_t
dtrace_getarg(int arg, int aframes)
{
printf("IMPLEMENT ME: %s\n", __func__);
return (0);
}
int
dtrace_getstackdepth(int aframes)
{
struct unwind_state state;
int scp_offset;
register_t sp;
int depth;
int done;
depth = 1;
done = 0;
__asm __volatile("mv %0, sp" : "=&r" (sp));
state.fp = (uint64_t)__builtin_frame_address(0);
state.sp = sp;
state.pc = (uint64_t)dtrace_getstackdepth;
do {
done = unwind_frame(&state);
if (!INKERNEL(state.pc) || !INKERNEL(state.fp))
break;
depth++;
} while (!done);
if (depth < aframes)
return (0);
else
return (depth - aframes);
}
ulong_t
dtrace_getreg(struct trapframe *rp, uint_t reg)
{
printf("IMPLEMENT ME: %s\n", __func__);
return (0);
}
static int
dtrace_copycheck(uintptr_t uaddr, uintptr_t kaddr, size_t size)
{
if (uaddr + size > VM_MAXUSER_ADDRESS || uaddr + size < uaddr) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = uaddr;
return (0);
}
return (1);
}
void
dtrace_copyin(uintptr_t uaddr, uintptr_t kaddr, size_t size,
volatile uint16_t *flags)
{
if (dtrace_copycheck(uaddr, kaddr, size))
dtrace_copy(uaddr, kaddr, size);
}
void
dtrace_copyout(uintptr_t kaddr, uintptr_t uaddr, size_t size,
volatile uint16_t *flags)
{
if (dtrace_copycheck(uaddr, kaddr, size))
dtrace_copy(kaddr, uaddr, size);
}
void
dtrace_copyinstr(uintptr_t uaddr, uintptr_t kaddr, size_t size,
volatile uint16_t *flags)
{
if (dtrace_copycheck(uaddr, kaddr, size))
dtrace_copystr(uaddr, kaddr, size, flags);
}
void
dtrace_copyoutstr(uintptr_t kaddr, uintptr_t uaddr, size_t size,
volatile uint16_t *flags)
{
if (dtrace_copycheck(uaddr, kaddr, size))
dtrace_copystr(kaddr, uaddr, size, flags);
}
uint8_t
dtrace_fuword8(void *uaddr)
{
if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
return (0);
}
return (dtrace_fuword8_nocheck(uaddr));
}
uint16_t
dtrace_fuword16(void *uaddr)
{
if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
return (0);
}
return (dtrace_fuword16_nocheck(uaddr));
}
uint32_t
dtrace_fuword32(void *uaddr)
{
if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
return (0);
}
return (dtrace_fuword32_nocheck(uaddr));
}
uint64_t
dtrace_fuword64(void *uaddr)
{
if ((uintptr_t)uaddr > VM_MAXUSER_ADDRESS) {
DTRACE_CPUFLAG_SET(CPU_DTRACE_BADADDR);
cpu_core[curcpu].cpuc_dtrace_illval = (uintptr_t)uaddr;
return (0);
}
return (dtrace_fuword64_nocheck(uaddr));
}

282
sys/cddl/dev/dtrace/riscv/dtrace_subr.c Normal file
View File

@ -0,0 +1,282 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* Portions Copyright 2016 Ruslan Bukin <br@bsdpad.com>
*
* $FreeBSD$
*
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/kmem.h>
#include <sys/smp.h>
#include <sys/dtrace_impl.h>
#include <sys/dtrace_bsd.h>
#include <machine/vmparam.h>
#include <machine/riscvreg.h>
#include <machine/riscv_opcode.h>
#include <machine/clock.h>
#include <machine/frame.h>
#include <machine/trap.h>
#include <vm/pmap.h>
extern dtrace_id_t dtrace_probeid_error;
extern int (*dtrace_invop_jump_addr)(struct trapframe *);
extern void dtrace_getnanotime(struct timespec *tsp);
int dtrace_invop(uintptr_t, struct trapframe *, uintptr_t);
void dtrace_invop_init(void);
void dtrace_invop_uninit(void);
typedef struct dtrace_invop_hdlr {
int (*dtih_func)(uintptr_t, struct trapframe *, uintptr_t);
struct dtrace_invop_hdlr *dtih_next;
} dtrace_invop_hdlr_t;
dtrace_invop_hdlr_t *dtrace_invop_hdlr;
int
dtrace_invop(uintptr_t addr, struct trapframe *frame, uintptr_t eax)
{
dtrace_invop_hdlr_t *hdlr;
int rval;
for (hdlr = dtrace_invop_hdlr; hdlr != NULL; hdlr = hdlr->dtih_next)
if ((rval = hdlr->dtih_func(addr, frame, eax)) != 0)
return (rval);
return (0);
}
void
dtrace_invop_add(int (*func)(uintptr_t, struct trapframe *, uintptr_t))
{
dtrace_invop_hdlr_t *hdlr;
hdlr = kmem_alloc(sizeof (dtrace_invop_hdlr_t), KM_SLEEP);
hdlr->dtih_func = func;
hdlr->dtih_next = dtrace_invop_hdlr;
dtrace_invop_hdlr = hdlr;
}
void
dtrace_invop_remove(int (*func)(uintptr_t, struct trapframe *, uintptr_t))
{
dtrace_invop_hdlr_t *hdlr, *prev;
hdlr = dtrace_invop_hdlr;
prev = NULL;
for (;;) {
if (hdlr == NULL)
panic("attempt to remove non-existent invop handler");
if (hdlr->dtih_func == func)
break;
prev = hdlr;
hdlr = hdlr->dtih_next;
}
if (prev == NULL) {
ASSERT(dtrace_invop_hdlr == hdlr);
dtrace_invop_hdlr = hdlr->dtih_next;
} else {
ASSERT(dtrace_invop_hdlr != hdlr);
prev->dtih_next = hdlr->dtih_next;
}
kmem_free(hdlr, 0);
}
/*ARGSUSED*/
void
dtrace_toxic_ranges(void (*func)(uintptr_t base, uintptr_t limit))
{
(*func)(0, (uintptr_t)VM_MIN_KERNEL_ADDRESS);
}
void
dtrace_xcall(processorid_t cpu, dtrace_xcall_t func, void *arg)
{
cpuset_t cpus;
if (cpu == DTRACE_CPUALL)
cpus = all_cpus;
else
CPU_SETOF(cpu, &cpus);
smp_rendezvous_cpus(cpus, smp_no_rendevous_barrier, func,
smp_no_rendevous_barrier, arg);
}
static void
dtrace_sync_func(void)
{
}
void
dtrace_sync(void)
{
dtrace_xcall(DTRACE_CPUALL, (dtrace_xcall_t)dtrace_sync_func, NULL);
}
/*
* DTrace needs a high resolution time function which can
* be called from a probe context and guaranteed not to have
* instrumented with probes itself.
*
* Returns nanoseconds since boot.
*/
uint64_t
dtrace_gethrtime()
{
struct timespec curtime;
nanouptime(&curtime);
return (curtime.tv_sec * 1000000000UL + curtime.tv_nsec);
}
uint64_t
dtrace_gethrestime(void)
{
struct timespec current_time;
dtrace_getnanotime(&current_time);
return (current_time.tv_sec * 1000000000UL + current_time.tv_nsec);
}
/* Function to handle DTrace traps during probes. See riscv/riscv/trap.c */
int
dtrace_trap(struct trapframe *frame, u_int type)
{
/*
* A trap can occur while DTrace executes a probe. Before
* executing the probe, DTrace blocks re-scheduling and sets
* a flag in it's per-cpu flags to indicate that it doesn't
* want to fault. On returning from the probe, the no-fault
* flag is cleared and finally re-scheduling is enabled.
*
* Check if DTrace has enabled 'no-fault' mode:
*
*/
if ((cpu_core[curcpu].cpuc_dtrace_flags & CPU_DTRACE_NOFAULT) != 0) {
/*
* There are only a couple of trap types that are expected.
* All the rest will be handled in the usual way.
*/
switch (type) {
case EXCP_LOAD_ACCESS_FAULT:
case EXCP_STORE_ACCESS_FAULT:
case EXCP_INSTR_ACCESS_FAULT:
/* Flag a bad address. */
cpu_core[curcpu].cpuc_dtrace_flags |= CPU_DTRACE_BADADDR;
cpu_core[curcpu].cpuc_dtrace_illval = 0;
/*
* Offset the instruction pointer to the instruction
* following the one causing the fault.
*/
frame->tf_sepc += 4;
return (1);
default:
/* Handle all other traps in the usual way. */
break;
}
}
/* Handle the trap in the usual way. */
return (0);
}
void
dtrace_probe_error(dtrace_state_t *state, dtrace_epid_t epid, int which,
int fault, int fltoffs, uintptr_t illval)
{
dtrace_probe(dtrace_probeid_error, (uint64_t)(uintptr_t)state,
(uintptr_t)epid,
(uintptr_t)which, (uintptr_t)fault, (uintptr_t)fltoffs);
}
static int
dtrace_invop_start(struct trapframe *frame)
{
int data, invop, reg, update_sp;
register_t arg1, arg2;
register_t *sp;
uint32_t imm;
InstFmt i;
int offs;
int tmp;
invop = dtrace_invop(frame->tf_sepc, frame, frame->tf_sepc);
if (invop == RISCV_INSN_RET) {
frame->tf_sepc = frame->tf_ra;
return (0);
}
if ((invop & SD_RA_SP_MASK) == SD_RA_SP) {
i.word = invop;
imm = i.SType.imm0_4 | (i.SType.imm5_11 << 5);
sp = (register_t *)((uint8_t *)frame->tf_sp + imm);
*sp = frame->tf_ra;
frame->tf_sepc += INSN_SIZE;
return (0);
}
return (-1);
}
void
dtrace_invop_init(void)
{
dtrace_invop_jump_addr = dtrace_invop_start;
}
void
dtrace_invop_uninit(void)
{
dtrace_invop_jump_addr = 0;
}

51
sys/cddl/dev/dtrace/riscv/regset.h Normal file
View File

@ -0,0 +1,51 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* $FreeBSD$
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#ifndef _REGSET_H
#define _REGSET_H
/*
* #pragma ident "@(#)regset.h 1.11 05/06/08 SMI"
*/
#ifdef __cplusplus
extern "C" {
#endif
/* Place here */
#ifdef __cplusplus
}
#endif
#endif /* _REGSET_H */

165
sys/cddl/dev/fbt/riscv/fbt_isa.c Normal file
View File

@ -0,0 +1,165 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* Portions Copyright 2006-2008 John Birrell jb@freebsd.org
* Portions Copyright 2013 Justin Hibbits jhibbits@freebsd.org
* Portions Copyright 2013 Howard Su howardsu@freebsd.org
* Portions Copyright 2016 Ruslan Bukin <br@bsdpad.com>
*
* $FreeBSD$
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/dtrace.h>
#include <machine/riscvreg.h>
#include "fbt.h"
#define FBT_PATCHVAL (RISCV_INSN_BREAK)
#define FBT_ENTRY "entry"
#define FBT_RETURN "return"
int
fbt_invop(uintptr_t addr, struct trapframe *frame, uintptr_t rval)
{
solaris_cpu_t *cpu;
fbt_probe_t *fbt;
cpu = &solaris_cpu[curcpu];
fbt = fbt_probetab[FBT_ADDR2NDX(addr)];
for (; fbt != NULL; fbt = fbt->fbtp_hashnext) {
if ((uintptr_t)fbt->fbtp_patchpoint == addr) {
cpu->cpu_dtrace_caller = addr;
dtrace_probe(fbt->fbtp_id, frame->tf_a[0],
frame->tf_a[1], frame->tf_a[2],
frame->tf_a[3], frame->tf_a[4]);
cpu->cpu_dtrace_caller = 0;
return (fbt->fbtp_savedval);
}
}
return (0);
}
void
fbt_patch_tracepoint(fbt_probe_t *fbt, fbt_patchval_t val)
{
*fbt->fbtp_patchpoint = val;
cpu_icache_sync_range((vm_offset_t)fbt->fbtp_patchpoint, 4);
}
int
fbt_provide_module_function(linker_file_t lf, int symindx,
linker_symval_t *symval, void *opaque)
{
fbt_probe_t *fbt, *retfbt;
uint32_t *target, *start;
uint32_t *instr, *limit;
const char *name;
char *modname;
int offs;
modname = opaque;
name = symval->name;
/* Check if function is excluded from instrumentation */
if (fbt_excluded(name))
return (0);
instr = (uint32_t *)(symval->value);
limit = (uint32_t *)(symval->value + symval->size);
/* Look for sd operation */
for (; instr < limit; instr++) {
if ((*instr & SD_RA_SP_MASK) == SD_RA_SP)
break;
}
if (instr >= limit)
return (0);
fbt = malloc(sizeof (fbt_probe_t), M_FBT, M_WAITOK | M_ZERO);
fbt->fbtp_name = name;
fbt->fbtp_id = dtrace_probe_create(fbt_id, modname,
name, FBT_ENTRY, 3, fbt);
fbt->fbtp_patchpoint = instr;
fbt->fbtp_ctl = lf;
fbt->fbtp_loadcnt = lf->loadcnt;
fbt->fbtp_savedval = *instr;
fbt->fbtp_patchval = FBT_PATCHVAL;
fbt->fbtp_rval = DTRACE_INVOP_SD;
fbt->fbtp_symindx = symindx;
fbt->fbtp_hashnext = fbt_probetab[FBT_ADDR2NDX(instr)];
fbt_probetab[FBT_ADDR2NDX(instr)] = fbt;
lf->fbt_nentries++;
retfbt = NULL;
again:
for (; instr < limit; instr++) {
if (*instr == RISCV_INSN_RET)
break;
}
if (instr >= limit)
return (0);
/*
* We have a winner!
*/
fbt = malloc(sizeof (fbt_probe_t), M_FBT, M_WAITOK | M_ZERO);
fbt->fbtp_name = name;
if (retfbt == NULL) {
fbt->fbtp_id = dtrace_probe_create(fbt_id, modname,
name, FBT_RETURN, 3, fbt);
} else {
retfbt->fbtp_next = fbt;
fbt->fbtp_id = retfbt->fbtp_id;
}
retfbt = fbt;
fbt->fbtp_patchpoint = instr;
fbt->fbtp_ctl = lf;
fbt->fbtp_loadcnt = lf->loadcnt;
fbt->fbtp_symindx = symindx;
fbt->fbtp_rval = DTRACE_INVOP_RET;
fbt->fbtp_savedval = *instr;
fbt->fbtp_patchval = FBT_PATCHVAL;
fbt->fbtp_hashnext = fbt_probetab[FBT_ADDR2NDX(instr)];
fbt_probetab[FBT_ADDR2NDX(instr)] = fbt;
lf->fbt_nentries++;
instr++;
goto again;
}

30
sys/cddl/dev/fbt/riscv/fbt_isa.h Normal file
View File

@ -0,0 +1,30 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*
* $FreeBSD$
*
*/
#ifndef _FBT_ISA_H_
#define _FBT_ISA_H_
typedef uint32_t fbt_patchval_t;
#endif

5
sys/cddl/dev/profile/profile.c
View File

@ -143,6 +143,11 @@ struct profile_probe_percpu;
#define PROF_ARTIFICIAL_FRAMES 10
#endif
#ifdef __riscv__
/* TODO: verify */
#define PROF_ARTIFICIAL_FRAMES 10
#endif
typedef struct profile_probe {
char prof_name[PROF_NAMELEN];
dtrace_id_t prof_id;

4
sys/conf/files.riscv
View File

@ -1,4 +1,8 @@
# $FreeBSD$
cddl/compat/opensolaris/kern/opensolaris_atomic.c optional zfs | dtrace compile-with "${CDDL_C}"
cddl/dev/dtrace/riscv/dtrace_asm.S optional dtrace compile-with "${DTRACE_S}"
cddl/dev/dtrace/riscv/dtrace_subr.c optional dtrace compile-with "${DTRACE_C}"
cddl/dev/fbt/riscv/fbt_isa.c optional dtrace_fbt | dtraceall compile-with "${FBT_C}"
crypto/blowfish/bf_enc.c optional crypto | ipsec
crypto/des/des_enc.c optional crypto | ipsec | netsmb
dev/ofw/ofw_cpu.c optional fdt

5
sys/riscv/include/frame.h
View File

@ -59,6 +59,11 @@ struct trapframe {
uint64_t tf_scause;
};
struct riscv_frame {
struct riscv_frame *f_frame;
u_long f_retaddr;
};
/*
* Signal frame. Pushed onto user stack before calling sigcode.
*/

5
sys/riscv/include/riscvreg.h
View File

@ -124,6 +124,11 @@
#define XLEN 8
#define INSN_SIZE 4
#define INSN_SIZE 4
#define RISCV_INSN_NOP 0x00000013
#define RISCV_INSN_BREAK 0x00100073
#define RISCV_INSN_RET 0x00008067
#define CSR_ZIMM(val) \
(__builtin_constant_p(val) && ((u_long)(val) < 32))

19
sys/riscv/riscv/trap.c
View File

@ -64,6 +64,12 @@ __FBSDID("$FreeBSD$");
#include <machine/resource.h>
#include <machine/intr.h>
#ifdef KDTRACE_HOOKS
#include <sys/dtrace_bsd.h>
#endif
int (*dtrace_invop_jump_addr)(struct trapframe *);
extern register_t fsu_intr_fault;
/* Called from exception.S */
@ -271,6 +277,11 @@ do_trap_supervisor(struct trapframe *frame)
return;
}
#ifdef KDTRACE_HOOKS
if (dtrace_trap_func != NULL && (*dtrace_trap_func)(frame, exception))
return;
#endif
CTR3(KTR_TRAP, "do_trap_supervisor: curthread: %p, sepc: %lx, frame: %p",
curthread, frame->tf_sepc, frame);
@ -281,6 +292,12 @@ do_trap_supervisor(struct trapframe *frame)
data_abort(frame, 0);
break;
case EXCP_INSTR_BREAKPOINT:
#ifdef KDTRACE_HOOKS
if (dtrace_invop_jump_addr != 0) {
dtrace_invop_jump_addr(frame);
break;
}
#endif
#ifdef KDB
kdb_trap(exception, 0, frame);
#else
@ -290,7 +307,7 @@ do_trap_supervisor(struct trapframe *frame)
break;
case EXCP_INSTR_ILLEGAL:
dump_regs(frame);
panic("Illegal instruction at %x\n", frame->tf_sepc);
panic("Illegal instruction at 0x%016lx\n", frame->tf_sepc);
break;
default:
dump_regs(frame);