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linux-user: Populate vdso_sigreturn_region_{start,end} from sigtramp page

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When a target does not support a vdso, we generate a sigtramp page.
The only thing on this page is a (set of) signal return syscalls.
We do not need to narrowly restrict the vdso_sigreturn_region;
simply record the entire page for all such targets.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
2025-09-04 12:11:45 +02:00
parent b9baf09512
commit 2c75137623
1 changed files with 2 additions and 0 deletions
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2
linux-user/elfload.c
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@@ -1974,6 +1974,8 @@ int load_elf_binary(struct linux_binprm *bprm, struct image_info *info)
setup_sigtramp(tramp_page);
target_mprotect(tramp_page, TARGET_PAGE_SIZE, PROT_READ | PROT_EXEC);
vdso_sigreturn_region_start = tramp_page;
vdso_sigreturn_region_end = tramp_page + TARGET_PAGE_SIZE;
}
bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &ehdr, info,