From: Rodger Combs <rodger.combs@gmail.com>
To: musl@lists.openwall.com
Subject: [PATCH 1/3] ldso: when run via CLI, set auxv as if the app was loaded by the kernel
Date: Mon, 9 Sep 2019 23:56:37 -0500 [thread overview]
Message-ID: <1568091399-23967-1-git-send-email-rodger.combs@gmail.com> (raw)
---
ldso/dynlink.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/ldso/dynlink.c b/ldso/dynlink.c
index 5ef2111..22181e3 100644
--- a/ldso/dynlink.c
+++ b/ldso/dynlink.c
@@ -1805,6 +1805,22 @@ void __dls3(size_t *sp)
}
dprintf(1, "\t%s (%p)\n", ldso.name, ldso.base);
}
+
+ // Make it look to the app as if it was loaded by the kernel
+ for (i=0; auxv[i]; i+=2) {
+ if (auxv[i] == AT_BASE)
+ auxv[i + 1] = (size_t)ldso.base;
+ if (auxv[i] == AT_PHDR)
+ auxv[i + 1] = (size_t)app.phdr;
+ if (auxv[i] == AT_ENTRY)
+ auxv[i + 1] = aux[AT_ENTRY];
+ if (auxv[i] == AT_PHNUM)
+ auxv[i + 1] = app.phnum;
+ if (auxv[i] == AT_PHENT)
+ auxv[i + 1] = app.phentsize;
+ if (auxv[i] == AT_EXECFN)
+ auxv[i + 1] = (size_t)app.name;
+ }
}
if (app.tls.size) {
libc.tls_head = tls_tail = &app.tls;
--
2.7.4
next reply other threads:[~2019-09-10 4:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-10 4:56 Rodger Combs [this message]
2019-09-10 4:56 ` [PATCH 2/3] ldso: move (un)map_library functions to separate file Rodger Combs
2019-09-10 4:56 ` [PATCH 3/3] crt: add dcrt1, with support for locating the dynamic loader at runtime Rodger Combs
-- strict thread matches above, loose matches on Subject: below --
2019-04-27 1:13 [PATCH 1/3] ldso: when run via CLI, set auxv as if the app was loaded by the kernel Rodger Combs
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