Mercurial > repos > blastem
annotate termhelper.c @ 1925:039553703c20
Don't apply address and cd register changes to the 'live' registers until pending flag is cleared, but do preserve the upper address bits in the latch. Fixes regression in Overdrive 2 while preserving fix to Mona in 344 bytes
author | Michael Pavone <pavone@retrodev.com> |
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date | Mon, 13 Apr 2020 20:43:25 -0700 |
parents | 792be135d3af |
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rev | line source |
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794
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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1 #include <sys/types.h> |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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2 #include <sys/stat.h> |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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3 #include <fcntl.h> |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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4 #include <unistd.h> |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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5 #include <stdlib.h> |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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6 #include "terminal.h" |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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7 |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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8 char buf[4096]; |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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9 |
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Spawn a terminal for the debugger when needed if we are not already attached to one
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10 void copy_data(int to, int from) |
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11 { |
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12 ssize_t bytes = read(from, buf, sizeof(buf)); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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13 while (bytes > 0) |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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14 { |
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15 ssize_t written = write(to, buf, bytes); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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16 if (written == -1) { |
792be135d3af
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17 exit(1); |
792be135d3af
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Michael Pavone <pavone@retrodev.com>
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18 } |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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19 bytes -= written; |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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20 } |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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21 } |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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22 |
792be135d3af
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23 int main(int argc, char **argv) |
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24 { |
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25 //these will block so order is important |
792be135d3af
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26 int input_fd = open(INPUT_PATH, O_WRONLY); |
792be135d3af
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27 int output_fd = open(OUTPUT_PATH, O_RDONLY); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
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28 fd_set read_fds; |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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29 FD_ZERO(&read_fds); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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30 for (;;) |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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31 { |
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32 FD_SET(STDIN_FILENO, &read_fds); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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33 FD_SET(output_fd, &read_fds); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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34 select(output_fd+1, &read_fds, NULL, NULL, NULL); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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35 |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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36 if (FD_ISSET(STDIN_FILENO, &read_fds)) { |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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37 copy_data(input_fd, STDIN_FILENO); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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38 } |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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39 if (FD_ISSET(output_fd, &read_fds)) { |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
diff
changeset
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40 copy_data(STDOUT_FILENO, output_fd); |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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41 } |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
parents:
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42 } |
792be135d3af
Spawn a terminal for the debugger when needed if we are not already attached to one
Michael Pavone <pavone@retrodev.com>
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43 return 0; |
792be135d3af
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44 } |