diff options
Diffstat (limited to 'gdb_remote.c')
| -rw-r--r-- | gdb_remote.c | 64 |
1 files changed, 58 insertions, 6 deletions
diff --git a/gdb_remote.c b/gdb_remote.c index c58d534..772a44a 100644 --- a/gdb_remote.c +++ b/gdb_remote.c @@ -1,6 +1,6 @@ /* Copyright 2013 Michael Pavone - This file is part of BlastEm. + This file is part of BlastEm. BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. */ #include "blastem.h" @@ -14,6 +14,7 @@ char * buf = NULL; char * curbuf = NULL; +char * end = NULL; size_t bufsize; int cont = 0; int expect_break_response=0; @@ -21,11 +22,54 @@ uint32_t resume_pc; void gdb_debug_enter(genesis_context * gen, uint32_t pc) { + fcntl(STDIN_FILENO, FD_SETFL, 0); resume_pc = pc; + cont = 0; + uint8_t partial = 0; while(!cont) { + if (!curbuf) { + int numread = read(STDIN_FILENO, buf, bufsize); + curbuf = buf; + end = buf + numread; + } else if (partial) { + if (curbuf != buf) { + memmove(curbuf, buf, end-curbuf); + end -= cufbuf - buf; + } + int numread = read(STDIN_FILENO, end, bufsize - (end-buf)); + end += numread; + curbuf = buf; + } + for (; curbuf < end; curbuf++) + { + if (*curbuf == '$') + { + curbuf++; + char * start = curbuf; + while (curbuf < end && *curbuf != '#') { + curbuf++; + } + if (*curbuf == '#') { + //check to make sure we've received the checksum bytes + if (end-curbuf >= 2) { + //TODO: verify checksum + //Null terminate payload + *curbuf = 0 + //send acknowledgement + write(FILENO_STDOUT, "+", 1); + gdb_run_command(genesis_context * gen, start); + curbuf += 2; + } + } else { + curbuf--; + partial = 1; + break; + } + } + } } - cont = 0; + fcntl(STDIN_FILENO, FD_SETFL, O_NONBLOCK); } void gdb_run_command(genesis_context * gen, char * command) @@ -90,7 +134,7 @@ void gdb_run_commands(genesis_context * gen) } } -void gdb_command_poll(genesis_context * gen) +int gdb_command_poll(genesis_context * gen) { for(;;) { @@ -104,10 +148,10 @@ void gdb_command_poll(genesis_context * gen) } curbuf = buf + bufsize/2; } - int numread = read(STDIN_FILENO, buf, bufsize - (curbuf-buf)); + int numread = read(STDIN_FILENO, buf, bufsize); if (numread < 0) { if (errno == EAGAIN || errno == EWOULDBLOCK) { - return; + return 0; } else { fprintf(stderr, "Error %d while reading GDB commands from stdin", errno); exit(1); @@ -115,8 +159,16 @@ void gdb_command_poll(genesis_context * gen) } else if (numread == 0) { exit(0); } - gdb_run_commands(genesis_context * gen); + for (curbuf = buf, end = buf+numread; curbuf < end; curbuf++) + { + if (*curbuf = 0x03) + { + curbuf++; + return 1; + } + } } + return 0; } void gdb_remote_init() |