[Crash-utility] [PATCH 4/7] Add remote_vtop.

From: Don Slutz <dslutz(a)verizon.com&gt; For eaxmple: crash> vtop 0xffffffff802ee778 VIRTUAL PHYSICAL ffffffff802ee778 4ee778 PML4 DIRECTORY: ffffffff80001000 PAGE DIRECTORY: 203067 PUD: 203ff0 => 205063 PMD: 205008 => bee2c163 PTE: bee2c770 => 4ee163 PAGE: 4ee000 PTE PHYSICAL FLAGS 4ee163 4ee000 (PRESENT|RW|ACCESSED|DIRTY|GLOBAL) PAGE PHYSICAL MAPPING INDEX CNT FLAGS ffff8100006f7410 4ee000 0 0 1 400 crash> set debug 1 debug: 1 crash> vtop 0xffffffff802ee778 VIRTUAL PHYSICAL ffffffff802ee778 4ee778 PML4 DIRECTORY: ffffffff80001000 PAGE DIRECTORY: 203067 PUD: 203ff0 => 205063 PMD: 205008 => bee2c163 PTE: bee2c770 => 4ee163 PAGE: 4ee000 PTE PHYSICAL FLAGS 4ee163 4ee000 (PRESENT|RW|ACCESSED|DIRTY|GLOBAL) PAGE PHYSICAL MAPPING INDEX CNT FLAGS ffff8100006f7410 4ee000 0 0 1 400 rvtop(ffffffff802ee778)=4ee778 Signed-off-by: Don Slutz <dslutz(a)verizon.com&gt; --- defs.h | 1 + memory.c | 19 +++++++++++++++++++ remote.c | 40 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 60 insertions(+) diff --git a/defs.h b/defs.h index e7073c6..94ba495 100755 --- a/defs.h +++ b/defs.h @@ -5527,6 +5527,7 @@ void dump_sockets_workhorse(ulong, ulong, struct reference *); */ int is_remote_daemon(char *); physaddr_t get_remote_phys_base(physaddr_t, physaddr_t); +physaddr_t remote_vtop(int, physaddr_t); void remote_fd_init(void); int get_remote_file(struct remote_file *); uint remote_page_size(void); diff --git a/memory.c b/memory.c index 5ec454d..d995f4d 100755 --- a/memory.c +++ b/memory.c @@ -2932,6 +2932,13 @@ cmd_vtop(void) do_vtop(vaddr, tc, vtop_flags | loop_vtop_flags); + if (REMOTE() && CRASHDEBUG(1)) { + ulong pAddr = remote_vtop(tc->processor, vaddr); + + if (pAddr) + fprintf(fp, "rvtop(%lx)=%lx\n", vaddr, pAddr); + } + optind++; } } @@ -17178,3 +17185,15 @@ get_kmem_cache_by_name(char *request) return found; } #endif /* NOT_USED */ + +/* + * Specify Emacs local variables so the formating + * of the code stays the same. + * + * Local variables: + * mode: C + * c-set-style: "BSD" + * c-basic-offset: 8 + * indent-tabs-mode: t + * End: + */ diff --git a/remote.c b/remote.c index 58588ce..2186af9 100755 --- a/remote.c +++ b/remote.c @@ -2342,6 +2342,46 @@ get_remote_phys_base(physaddr_t text_start, physaddr_t virt_phys_base) } /* + * Do a remote VTOP if supported. + */ +physaddr_t +remote_vtop(int cpu, physaddr_t virt_addr) +{ + char sendbuf[BUFSIZE]; + char recvbuf[BUFSIZE]; + char *p1, *p2, *p3, *p4; + int errflag; + ulong value; + + if (!rc->remoteType[0]) + return 0; /* Not a special remote. */ + + BZERO(sendbuf, BUFSIZE); + BZERO(recvbuf, BUFSIZE); + sprintf(sendbuf, "VTOP %d %llx", cpu, virt_addr); + remote_tcp_write_string(pc->sockfd, sendbuf); + remote_tcp_read_string(pc->sockfd, recvbuf, BUFSIZE-1, pc->flags2 & REMOTE_NIL); + + if (CRASHDEBUG(2)) + fprintf(fp, "remote_vtop(%d,%llx): [%s]\n", + cpu, virt_addr, recvbuf); + + if (strstr(recvbuf, "<FAIL>")) + error(FATAL, "remote_vtop for CPU %d\n", cpu); + p1 = strtok(recvbuf, " "); /* VTOP */ + p2 = strtok(NULL, " "); /* cpu */ + p3 = strtok(NULL, " "); /* vaddr */ + p4 = strtok(NULL, " "); /* paddr */ + + errflag = 0; + value = htol(p4, RETURN_ON_ERROR|QUIET, &errflag); + if (!errflag) { + return value; + } + return 0; +} + +/* * * Set up the file descriptors and file name strings if they haven't * been set up before: -- 1.8.4