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linux-user: Adjust SVr4 NULL page mapping

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Use TARGET_PAGE_SIZE and MAP_FIXED_NOREPLACE.

We really should be attending to this earlier during
probe_guest_base, as well as better detection and
emulation of various Linux personalities.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-3-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-01-02 12:57:37 +11:00
parent a372d483f1
commit f11c05c3b9
1 changed files with 3 additions and 2 deletions
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linux-user/elfload.c
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@ -3912,8 +3912,9 @@ int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
and some applications "depend" upon this behavior. Since
we do not have the power to recompile these, we emulate
the SVr4 behavior. Sigh. */
target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC,
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
target_mmap(0, TARGET_PAGE_SIZE, PROT_READ | PROT_EXEC,
MAP_FIXED_NOREPLACE | MAP_PRIVATE | MAP_ANONYMOUS,
-1, 0);
}
#ifdef TARGET_MIPS
info->interp_fp_abi = interp_info.fp_abi;