blog:pushbx:2022:0506_embarrassing_ldebug_bug_in_ensuredebuggeeloaded
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blog:pushbx:2022:0506_embarrassing_ldebug_bug_in_ensuredebuggeeloaded [2022-05-06 16:36:39 +0200 May Fri] ecm created |
blog:pushbx:2022:0506_embarrassing_ldebug_bug_in_ensuredebuggeeloaded [2022-05-06 16:45:26 +0200 May Fri] (current) ecm |
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| resetting it to zero to be precise. | resetting it to zero to be precise. | ||
| But the allocation, if successful, left **the segment of the allocated memory block** | But the allocation, if successful, left **the segment of the allocated memory block** | ||
| - | in'' | + | in '' |
| - | interrupt 21h function 55h to create a child PSP. | + | [[https:// |
| Passing a zero to the subsequent code made this function call | Passing a zero to the subsequent code made this function call | ||
| destroy the (linear) first 256 bytes of memory, or the first 64 entries | destroy the (linear) first 256 bytes of memory, or the first 64 entries | ||
| Line 27: | Line 27: | ||
| * Loading the debugger command line prompt without a debuggee file to load | * Loading the debugger command line prompt without a debuggee file to load | ||
| * Loading the debugger with a binary file to load (filename extension neither '' | * Loading the debugger with a binary file to load (filename extension neither '' | ||
| - | * The debuggee process quitting by itself | + | * The debuggee process quitting by itself |
| - | * The debuggee process being terminated by the QA or Q commands | + | * The debuggee process being terminated by the QA |
| The only case in which it did not crash, | The only case in which it did not crash, | ||
| basically, | basically, | ||
| was to load up an executable to run as a debuggee. | was to load up an executable to run as a debuggee. | ||
| - | And even then, only until trying to quit the debugger or terminate the debuggee. | + | And even then, only until trying to terminate the debuggee. |
| + | (However, not when terminating the debuggee by entering a Q command to the debugger.) | ||
| Unfortunately, | Unfortunately, | ||
| Next, I suspected it might be | Next, I suspected it might be | ||
blog/pushbx/2022/0506_embarrassing_ldebug_bug_in_ensuredebuggeeloaded.1651847799.txt.gz · Last modified: 2022-05-06 16:36:39 +0200 May Fri by ecm
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