From: Pedro Alves Date: Tue, 25 Jan 2011 11:54:00 +0000 (+0000) Subject: Stop remote_read_bytes from handling partial reads itself. X-Git-Tag: cgen-snapshot-20110201~48 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f7605bc29f0c6454f73819850dd114cdba30d9fb;p=external%2Fbinutils.git Stop remote_read_bytes from handling partial reads itself. * remote-fileio.c: Include target.h. (remote_fileio_write_bytes): Delete. (remote_fileio_func_open, remote_fileio_func_write) (remote_fileio_func_rename, remote_fileio_func_unlink): Use target_read_memory. (remote_fileio_func_stat): Use target_read_memory and target_write_memory. (remote_fileio_func_gettimeofday): Use target_write_memory. (remote_fileio_func_system): Use target_read_memory. * remote.c (remote_write_bytes): Make it static. (remote_read_bytes): Don't handle partial reads here. * remote.h (remote_read_bytes): Delete declaration. --- diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 059db18..ecb1724 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,22 @@ 2011-01-25 Pedro Alves + Stop remote_read_bytes from handling partial reads itself. + + * remote-fileio.c: Include target.h. + (remote_fileio_write_bytes): Delete. + (remote_fileio_func_open, remote_fileio_func_write) + (remote_fileio_func_rename, remote_fileio_func_unlink): Use + target_read_memory. + (remote_fileio_func_stat): Use target_read_memory and + target_write_memory. + (remote_fileio_func_gettimeofday): Use target_write_memory. + (remote_fileio_func_system): Use target_read_memory. + * remote.c (remote_write_bytes): Make it static. + (remote_read_bytes): Don't handle partial reads here. + * remote.h (remote_read_bytes): Delete declaration. + +2011-01-25 Pedro Alves + Simplify XML parsing a bit. * xml-support.h (gdb_xml_parse_quick): Declare. diff --git a/gdb/remote-fileio.c b/gdb/remote-fileio.c index 4931c45..38d7c7c 100644 --- a/gdb/remote-fileio.c +++ b/gdb/remote-fileio.c @@ -30,6 +30,7 @@ #include "exceptions.h" #include "remote-fileio.h" #include "event-loop.h" +#include "target.h" #include #include @@ -588,29 +589,11 @@ remote_fileio_return_success (int retcode) remote_fileio_reply (retcode, 0); } -/* Wrapper function for remote_write_bytes() which has the disadvantage to - write only one packet, regardless of the requested number of bytes to - transfer. This wrapper calls remote_write_bytes() as often as needed. */ -static int -remote_fileio_write_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len) -{ - int ret = 0, written; - - while (len > 0 && (written = remote_write_bytes (memaddr, myaddr, len)) > 0) - { - len -= written; - memaddr += written; - myaddr += written; - ret += written; - } - return ret; -} - static void remote_fileio_func_open (char *buf) { CORE_ADDR ptrval; - int length, retlength; + int length; long num; int flags, fd; mode_t mode; @@ -638,10 +621,9 @@ remote_fileio_func_open (char *buf) } mode = remote_fileio_mode_to_host (num, 1); - /* Request pathname using 'm' packet. */ + /* Request pathname. */ pathname = alloca (length); - retlength = remote_read_bytes (ptrval, (gdb_byte *) pathname, length); - if (retlength != length) + if (target_read_memory (ptrval, (gdb_byte *) pathname, length) != 0) { remote_fileio_ioerror (); return; @@ -819,10 +801,9 @@ remote_fileio_func_read (char *buf) if (ret > 0) { - retlength = remote_fileio_write_bytes (ptrval, buffer, ret); - if (retlength != ret) - ret = -1; /* errno has been set to EIO in - remote_fileio_write_bytes(). */ + errno = target_write_memory (ptrval, buffer, ret); + if (errno != 0) + ret = -1; } if (ret < 0) @@ -839,7 +820,7 @@ remote_fileio_func_write (char *buf) long target_fd, num; LONGEST lnum; CORE_ADDR ptrval; - int fd, ret, retlength; + int fd, ret; gdb_byte *buffer; size_t length; @@ -871,8 +852,7 @@ remote_fileio_func_write (char *buf) length = (size_t) num; buffer = (gdb_byte *) xmalloc (length); - retlength = remote_read_bytes (ptrval, buffer, length); - if (retlength != length) + if (target_read_memory (ptrval, buffer, length) != 0) { xfree (buffer); remote_fileio_ioerror (); @@ -966,7 +946,7 @@ static void remote_fileio_func_rename (char *buf) { CORE_ADDR old_ptr, new_ptr; - int old_len, new_len, retlength; + int old_len, new_len; char *oldpath, *newpath; int ret, of, nf; struct stat ost, nst; @@ -987,8 +967,7 @@ remote_fileio_func_rename (char *buf) /* Request oldpath using 'm' packet */ oldpath = alloca (old_len); - retlength = remote_read_bytes (old_ptr, (gdb_byte *) oldpath, old_len); - if (retlength != old_len) + if (target_read_memory (old_ptr, (gdb_byte *) oldpath, old_len) != 0) { remote_fileio_ioerror (); return; @@ -996,8 +975,7 @@ remote_fileio_func_rename (char *buf) /* Request newpath using 'm' packet */ newpath = alloca (new_len); - retlength = remote_read_bytes (new_ptr, (gdb_byte *) newpath, new_len); - if (retlength != new_len) + if (target_read_memory (new_ptr, (gdb_byte *) newpath, new_len) != 0) { remote_fileio_ioerror (); return; @@ -1062,7 +1040,7 @@ static void remote_fileio_func_unlink (char *buf) { CORE_ADDR ptrval; - int length, retlength; + int length; char *pathname; int ret; struct stat st; @@ -1075,8 +1053,7 @@ remote_fileio_func_unlink (char *buf) } /* Request pathname using 'm' packet */ pathname = alloca (length); - retlength = remote_read_bytes (ptrval, (gdb_byte *) pathname, length); - if (retlength != length) + if (target_read_memory (ptrval, (gdb_byte *) pathname, length) != 0) { remote_fileio_ioerror (); return; @@ -1103,7 +1080,7 @@ static void remote_fileio_func_stat (char *buf) { CORE_ADDR statptr, nameptr; - int ret, namelength, retlength; + int ret, namelength; char *pathname; LONGEST lnum; struct stat st; @@ -1126,8 +1103,7 @@ remote_fileio_func_stat (char *buf) /* Request pathname using 'm' packet */ pathname = alloca (namelength); - retlength = remote_read_bytes (nameptr, (gdb_byte *) pathname, namelength); - if (retlength != namelength) + if (target_read_memory (nameptr, (gdb_byte *) pathname, namelength) != 0) { remote_fileio_ioerror (); return; @@ -1151,10 +1127,9 @@ remote_fileio_func_stat (char *buf) { remote_fileio_to_fio_stat (&st, &fst); remote_fileio_to_fio_uint (0, fst.fst_dev); - - retlength = remote_fileio_write_bytes (statptr, - (gdb_byte *) &fst, sizeof fst); - if (retlength != sizeof fst) + + errno = target_write_memory (statptr, (gdb_byte *) &fst, sizeof fst); + if (errno != 0) { remote_fileio_return_errno (-1); return; @@ -1236,9 +1211,8 @@ remote_fileio_func_fstat (char *buf) { remote_fileio_to_fio_stat (&st, &fst); - retlength = remote_fileio_write_bytes (ptrval, (gdb_byte *) &fst, - sizeof fst); - if (retlength != sizeof fst) + errno = target_write_memory (ptrval, (gdb_byte *) &fst, sizeof fst); + if (errno != 0) { remote_fileio_return_errno (-1); return; @@ -1289,9 +1263,8 @@ remote_fileio_func_gettimeofday (char *buf) { remote_fileio_to_fio_timeval (&tv, &ftv); - retlength = remote_fileio_write_bytes (ptrval, (gdb_byte *) &ftv, - sizeof ftv); - if (retlength != sizeof ftv) + errno = target_write_memory (ptrval, (gdb_byte *) &ftv, sizeof ftv); + if (errno != 0) { remote_fileio_return_errno (-1); return; @@ -1336,8 +1309,7 @@ remote_fileio_func_system (char *buf) { /* Request commandline using 'm' packet */ cmdline = alloca (length); - retlength = remote_read_bytes (ptrval, (gdb_byte *) cmdline, length); - if (retlength != length) + if (target_read_memory (ptrval, (gdb_byte *) cmdline, length) != 0) { remote_fileio_ioerror (); return; diff --git a/gdb/remote.c b/gdb/remote.c index 48d9d55..b440e9e 100644 --- a/gdb/remote.c +++ b/gdb/remote.c @@ -6356,7 +6356,7 @@ remote_write_bytes_aux (const char *header, CORE_ADDR memaddr, Returns number of bytes transferred, or 0 (setting errno) for error. Only transfer a single packet. */ -int +static int remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len) { char *packet_format = 0; @@ -6391,19 +6391,14 @@ remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, int len) Returns number of bytes transferred, or 0 for error. */ -/* NOTE: cagney/1999-10-18: This function (and its siblings in other - remote targets) shouldn't attempt to read the entire buffer. - Instead it should read a single packet worth of data and then - return the byte size of that packet to the caller. The caller (its - caller and its callers caller ;-) already contains code for - handling partial reads. */ - -int +static int remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len) { struct remote_state *rs = get_remote_state (); int max_buf_size; /* Max size of packet output buffer. */ - int origlen; + char *p; + int todo; + int i; if (len <= 0) return 0; @@ -6412,56 +6407,37 @@ remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len) /* The packet buffer will be large enough for the payload; get_memory_packet_size ensures this. */ - origlen = len; - while (len > 0) - { - char *p; - int todo; - int i; + /* Number if bytes that will fit. */ + todo = min (len, max_buf_size / 2); - todo = min (len, max_buf_size / 2); /* num bytes that will fit. */ - - /* construct "m"","" */ - /* sprintf (rs->buf, "m%lx,%x", (unsigned long) memaddr, todo); */ - memaddr = remote_address_masked (memaddr); - p = rs->buf; - *p++ = 'm'; - p += hexnumstr (p, (ULONGEST) memaddr); - *p++ = ','; - p += hexnumstr (p, (ULONGEST) todo); - *p = '\0'; - - putpkt (rs->buf); - getpkt (&rs->buf, &rs->buf_size, 0); - - if (rs->buf[0] == 'E' - && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2]) - && rs->buf[3] == '\0') - { - /* There is no correspondance between what the remote - protocol uses for errors and errno codes. We would like - a cleaner way of representing errors (big enough to - include errno codes, bfd_error codes, and others). But - for now just return EIO. */ - errno = EIO; - return 0; - } - - /* Reply describes memory byte by byte, - each byte encoded as two hex characters. */ - - p = rs->buf; - if ((i = hex2bin (p, myaddr, todo)) < todo) - { - /* Reply is short. This means that we were able to read - only part of what we wanted to. */ - return i + (origlen - len); - } - myaddr += todo; - memaddr += todo; - len -= todo; + /* Construct "m"","". */ + memaddr = remote_address_masked (memaddr); + p = rs->buf; + *p++ = 'm'; + p += hexnumstr (p, (ULONGEST) memaddr); + *p++ = ','; + p += hexnumstr (p, (ULONGEST) todo); + *p = '\0'; + putpkt (rs->buf); + getpkt (&rs->buf, &rs->buf_size, 0); + if (rs->buf[0] == 'E' + && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2]) + && rs->buf[3] == '\0') + { + /* There is no correspondance between what the remote protocol + uses for errors and errno codes. We would like a cleaner way + of representing errors (big enough to include errno codes, + bfd_error codes, and others). But for now just return + EIO. */ + errno = EIO; + return 0; } - return origlen; + /* Reply describes memory byte by byte, each byte encoded as two hex + characters. */ + p = rs->buf; + i = hex2bin (p, myaddr, todo); + /* Return what we have. Let higher layers handle partial reads. */ + return i; } diff --git a/gdb/remote.h b/gdb/remote.h index 5327947..25f5ccc 100644 --- a/gdb/remote.h +++ b/gdb/remote.h @@ -42,11 +42,6 @@ extern char *unpack_varlen_hex (char *buff, ULONGEST *result); extern void async_remote_interrupt_twice (void *arg); -extern int remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr, - int len); - -extern int remote_read_bytes (CORE_ADDR memaddr, gdb_byte *myaddr, int len); - void register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes, const struct target_desc *tdesc); void register_remote_support_xml (const char *);