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Diffstat (limited to 'cddl/contrib/opensolaris/lib/libdtrace/sparc/dt_isadep.c')
-rw-r--r--cddl/contrib/opensolaris/lib/libdtrace/sparc/dt_isadep.c338
1 files changed, 338 insertions, 0 deletions
diff --git a/cddl/contrib/opensolaris/lib/libdtrace/sparc/dt_isadep.c b/cddl/contrib/opensolaris/lib/libdtrace/sparc/dt_isadep.c
new file mode 100644
index 000000000000..ed05275e7f83
--- /dev/null
+++ b/cddl/contrib/opensolaris/lib/libdtrace/sparc/dt_isadep.c
@@ -0,0 +1,338 @@
+/*
+ * 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.
+ */
+
+#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>
+
+#define OP(x) ((x) >> 30)
+#define OP2(x) (((x) >> 22) & 0x07)
+#define COND(x) (((x) >> 25) & 0x0f)
+#define A(x) (((x) >> 29) & 0x01)
+
+#define OP_BRANCH 0
+
+#define OP2_BPcc 0x1
+#define OP2_Bicc 0x2
+#define OP2_BPr 0x3
+#define OP2_FBPfcc 0x5
+#define OP2_FBfcc 0x6
+
+/*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)
+{
+
+ uint32_t *text;
+ int i;
+ int srdepth = 0;
+
+ if ((text = malloc(symp->st_size + 4)) == NULL) {
+ dt_dprintf("mr sparkle: malloc() failed\n");
+ return (DT_PROC_ERR);
+ }
+
+ if (Pread(P, text, symp->st_size, symp->st_value) != symp->st_size) {
+ dt_dprintf("mr sparkle: Pread() failed\n");
+ free(text);
+ return (DT_PROC_ERR);
+ }
+
+ /*
+ * Leave a dummy instruction in the last slot to simplify edge
+ * conditions.
+ */
+ text[symp->st_size / 4] = 0;
+
+ ftp->ftps_type = DTFTP_RETURN;
+ ftp->ftps_pc = symp->st_value;
+ ftp->ftps_size = symp->st_size;
+ ftp->ftps_noffs = 0;
+
+ for (i = 0; i < symp->st_size / 4; i++) {
+ /*
+ * If we encounter an existing tracepoint, query the
+ * kernel to find out the instruction that was
+ * replaced at this spot.
+ */
+ while (text[i] == FASTTRAP_INSTR) {
+ fasttrap_instr_query_t instr;
+
+ instr.ftiq_pid = Pstatus(P)->pr_pid;
+ instr.ftiq_pc = symp->st_value + i * 4;
+
+ if (ioctl(dtp->dt_ftfd, FASTTRAPIOC_GETINSTR,
+ &instr) != 0) {
+
+ if (errno == ESRCH || errno == ENOENT) {
+ if (Pread(P, &text[i], 4,
+ instr.ftiq_pc) != 4) {
+ dt_dprintf("mr sparkle: "
+ "Pread() failed\n");
+ free(text);
+ return (DT_PROC_ERR);
+ }
+ continue;
+ }
+
+ free(text);
+ dt_dprintf("mr sparkle: getinstr query "
+ "failed: %s\n", strerror(errno));
+ return (DT_PROC_ERR);
+ }
+
+ text[i] = instr.ftiq_instr;
+ break;
+ }
+
+ /* save */
+ if ((text[i] & 0xc1f80000) == 0x81e00000) {
+ srdepth++;
+ continue;
+ }
+
+ /* restore */
+ if ((text[i] & 0xc1f80000) == 0x81e80000) {
+ srdepth--;
+ continue;
+ }
+
+ if (srdepth > 0) {
+ /* ret */
+ if (text[i] == 0x81c7e008)
+ goto is_ret;
+
+ /* return */
+ if (text[i] == 0x81cfe008)
+ goto is_ret;
+
+ /* call or jmpl w/ restore in the slot */
+ if (((text[i] & 0xc0000000) == 0x40000000 ||
+ (text[i] & 0xc1f80000) == 0x81c00000) &&
+ (text[i + 1] & 0xc1f80000) == 0x81e80000)
+ goto is_ret;
+
+ /* call to one of the stret routines */
+ if ((text[i] & 0xc0000000) == 0x40000000) {
+ int32_t disp = text[i] << 2;
+ uint64_t dest = ftp->ftps_pc + i * 4 + disp;
+
+ dt_dprintf("dest = %llx\n", (u_longlong_t)dest);
+
+ if (dest == stret[0] || dest == stret[1] ||
+ dest == stret[2] || dest == stret[3])
+ goto is_ret;
+ }
+ } else {
+ /* external call */
+ if ((text[i] & 0xc0000000) == 0x40000000) {
+ int32_t dst = text[i] << 2;
+
+ dst += i * 4;
+
+ if ((uintptr_t)dst >= (uintptr_t)symp->st_size)
+ goto is_ret;
+ }
+
+ /* jmpl into %g0 -- this includes the retl pseudo op */
+ if ((text[i] & 0xfff80000) == 0x81c00000)
+ goto is_ret;
+
+ /* external branch -- possible return site */
+ if (OP(text[i]) == OP_BRANCH) {
+ int32_t dst;
+ int baa;
+
+ switch (OP2(text[i])) {
+ case OP2_BPcc:
+ dst = text[i] & 0x7ffff;
+ dst <<= 13;
+ dst >>= 11;
+
+ baa = COND(text[i]) == 8 && A(text[i]);
+ break;
+ case OP2_Bicc:
+ dst = text[i] & 0x3fffff;
+ dst <<= 10;
+ dst >>= 8;
+
+ baa = COND(text[i]) == 8 && A(text[i]);
+ break;
+ case OP2_BPr:
+ dst = (((text[i]) >> 6) & 0xc000) |
+ ((text[i]) & 0x3fff);
+ dst <<= 16;
+ dst >>= 14;
+
+ baa = 0;
+ break;
+ case OP2_FBPfcc:
+ dst = text[i] & 0x7ffff;
+ dst <<= 13;
+ dst >>= 11;
+
+ baa = COND(text[i]) == 8 && A(text[i]);
+ break;
+ case OP2_FBfcc:
+ dst = text[i] & 0x3fffff;
+ dst <<= 10;
+ dst >>= 8;
+
+ baa = COND(text[i]) == 8 && A(text[i]);
+ break;
+ default:
+ continue;
+ }
+
+ dst += i * 4;
+
+ /*
+ * Interpret branches outside of the function's
+ * bounds as potential return sites. If the
+ * branch is a ba,a don't skip the instruction
+ * in the delay slot.
+ */
+ if ((uintptr_t)dst >=
+ (uintptr_t)symp->st_size) {
+ if (baa)
+ goto is_ret_baa;
+ else
+ goto is_ret;
+ }
+ }
+ }
+
+ continue;
+is_ret:
+ i++;
+is_ret_baa:
+ dt_dprintf("return at offset %x\n", i * 4);
+ ftp->ftps_offs[ftp->ftps_noffs++] = i * 4;
+ }
+
+ free(text);
+ if (ftp->ftps_noffs > 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 (ftp->ftps_noffs);
+}
+
+/*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 (off & 0x3)
+ 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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-27 02:09:47 +0000