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linux-user/elfload: fix filling psinfo->pr_psargs 

The current code dumps the memory between arg_start and arg_end,
which contains the argv pointers. This results in the

    Core was generated by `<garbage>`

message when opening the core file in GDB. This is because the code is
supposed to dump the actual arg strings. Fix by using arg_strings and
env_strings instead of arg_start and arg_end.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20210413205814.22821-1-iii@linux.ibm.com>
[lv: add missing braces]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Ilya Leoshkevich 2021-04-13 22:58:14 +02:00 committed by Laurent Vivier
parent fb80439b1e
commit 5f779a3a26
1 changed files with 3 additions and 2 deletions
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5
linux-user/elfload.c
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@ -3618,11 +3618,12 @@ static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts)
(void) memset(psinfo, 0, sizeof (*psinfo));
len = ts->info->arg_end - ts->info->arg_start;
len = ts->info->env_strings - ts->info->arg_strings;
if (len >= ELF_PRARGSZ)
len = ELF_PRARGSZ - 1;
if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_start, len))
if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_strings, len)) {
return -EFAULT;
}
for (i = 0; i < len; i++)
if (psinfo->pr_psargs[i] == 0)
psinfo->pr_psargs[i] = ' ';