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From: Szabolcs Nagy <nsz@sourceware.org> To: glibc-cvs@sourceware.org Subject: [glibc/arm/gcs] aarch64: process gnu properties in static exe Date: Wed, 14 Feb 2024 15:07:50 +0000 (GMT) [thread overview] Message-ID: <20240214150750.34BCB385E45A@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=fcdce58087260a68d1a74b28e5b0146e69511f16 commit fcdce58087260a68d1a74b28e5b0146e69511f16 Author: Szabolcs Nagy <szabolcs.nagy@arm.com> Date: Wed Dec 27 17:17:11 2023 +0000 aarch64: process gnu properties in static exe Diff: --- sysdeps/unix/sysv/linux/aarch64/libc-start.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/sysdeps/unix/sysv/linux/aarch64/libc-start.h b/sysdeps/unix/sysv/linux/aarch64/libc-start.h index ccf0f8af5c..6e2e9762ee 100644 --- a/sysdeps/unix/sysv/linux/aarch64/libc-start.h +++ b/sysdeps/unix/sysv/linux/aarch64/libc-start.h @@ -21,6 +21,8 @@ #ifndef SHARED +# include <dl-prop.h> + # ifndef PR_SET_SHADOW_STACK_STATUS # define PR_GET_SHADOW_STACK_STATUS 71 # define PR_SET_SHADOW_STACK_STATUS 72 @@ -36,6 +38,16 @@ aarch64_libc_setup_tls (void) { __libc_setup_tls (); + struct link_map *main_map = _dl_get_dl_main_map (); + const ElfW(Phdr) *phdr = GL(dl_phdr); + const ElfW(Phdr) *ph; + for (ph = phdr; ph < phdr + GL(dl_phnum); ph++) + if (ph->p_type == PT_GNU_PROPERTY) + { + _dl_process_pt_gnu_property (main_map, -1, ph); + _rtld_main_check (main_map, _dl_argv[0]); + break; + } uint64_t s = GL(dl_aarch64_gcs); if (s != 0) INLINE_SYSCALL_CALL (prctl, PR_SET_SHADOW_STACK_STATUS, s, 0, 0, 0);
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