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bsd-user: Add system independent stack, data and text limiting

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Eliminate the x86 specific stack stuff in favor of more generic control
over the process size:
    target_maxtsiz  max text size
    target_dfldsiz  initial data size limit
    target_maxdsiz  max data size
    target_dflssiz  initial stack size limit
    target_maxssiz  max stack size
    target_sgrowsiz amount to grow stack
These can be set on a per-arch basis, and the stack size can be set
on the command line. Adjust the stack size parameters at startup.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Warner Losh 2021-08-06 18:48:37 -06:00 • committed by Warner Losh
parent 82792244da
commit 312a0b1cbf
3 changed files with 45 additions and 16 deletions
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2
bsd-user/elfload.c
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@ -204,7 +204,7 @@ static abi_ulong setup_arg_pages(abi_ulong p, struct bsd_binprm *bprm,
/* Create enough stack to hold everything. If we don't use
* it for args, we'll use it for something else...
*/
size = x86_stack_size;
size = target_dflssiz;
if (size < MAX_ARG_PAGES * TARGET_PAGE_SIZE)
size = MAX_ARG_PAGES * TARGET_PAGE_SIZE;
error = target_mmap(0,