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| author | H.J. Lu <hjl.tools@gmail.com> | 2021-06-18 11:53:55 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-10-07 10:26:08 -0700 |
| commit | 1bd888d0b705fa5ab7b443724288f7ba12939533 (patch) | |
| tree | 166dd3a513e03da33dfad8b580b8f415db93b91d /sysdeps/x86/dl-prop.h | |
| parent | 1836bb2ebf62bd9a3588f2ed2d851c8ae810097a (diff) | |
| download | glibc-1bd888d0b705fa5ab7b443724288f7ba12939533.zip glibc-1bd888d0b705fa5ab7b443724288f7ba12939533.tar.gz glibc-1bd888d0b705fa5ab7b443724288f7ba12939533.tar.bz2 | |
Initial support for GNU_PROPERTY_1_NEEDED
1. Add GNU_PROPERTY_1_NEEDED:
#define GNU_PROPERTY_1_NEEDED GNU_PROPERTY_UINT32_OR_LO
to indicate the needed properties by the object file.
2. Add GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS:
#define GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS (1U << 0)
to indicate that the object file requires canonical function pointers and
cannot be used with copy relocation.
3. Scan GNU_PROPERTY_1_NEEDED property and store it in l_1_needed.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/x86/dl-prop.h')
| -rw-r--r-- | sysdeps/x86/dl-prop.h | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/sysdeps/x86/dl-prop.h b/sysdeps/x86/dl-prop.h index 56bd020..385548f 100644 --- a/sysdeps/x86/dl-prop.h +++ b/sysdeps/x86/dl-prop.h @@ -97,6 +97,7 @@ _dl_process_property_note (struct link_map *l, const ElfW(Nhdr) *note, const ElfW(Addr) start = (ElfW(Addr)) note; + unsigned int needed_1 = 0; unsigned int feature_1_and = 0; unsigned int isa_1_needed = 0; unsigned int last_type = 0; @@ -141,7 +142,8 @@ _dl_process_property_note (struct link_map *l, const ElfW(Nhdr) *note, last_type = type; if (type == GNU_PROPERTY_X86_FEATURE_1_AND - || type == GNU_PROPERTY_X86_ISA_1_NEEDED) + || type == GNU_PROPERTY_X86_ISA_1_NEEDED + || type == GNU_PROPERTY_1_NEEDED) { /* The sizes of types which we are searching for are 4 bytes. There is no point to continue if this @@ -151,12 +153,18 @@ _dl_process_property_note (struct link_map *l, const ElfW(Nhdr) *note, /* NB: Stop the scan only after seeing all types which we are searching for. */ - _Static_assert ((GNU_PROPERTY_X86_ISA_1_NEEDED > - GNU_PROPERTY_X86_FEATURE_1_AND), + _Static_assert (((GNU_PROPERTY_X86_ISA_1_NEEDED + > GNU_PROPERTY_X86_FEATURE_1_AND) + && (GNU_PROPERTY_X86_FEATURE_1_AND + > GNU_PROPERTY_1_NEEDED)), "GNU_PROPERTY_X86_ISA_1_NEEDED > " - "GNU_PROPERTY_X86_FEATURE_1_AND"); + "GNU_PROPERTY_X86_FEATURE_1_AND && " + "GNU_PROPERTY_X86_FEATURE_1_AND > " + "GNU_PROPERTY_1_NEEDED"); if (type == GNU_PROPERTY_X86_FEATURE_1_AND) feature_1_and = *(unsigned int *) ptr; + else if (type == GNU_PROPERTY_1_NEEDED) + needed_1 = *(unsigned int *) ptr; else { isa_1_needed = *(unsigned int *) ptr; @@ -187,9 +195,10 @@ _dl_process_property_note (struct link_map *l, const ElfW(Nhdr) *note, } /* We get here only if there is one or no GNU property note. */ - if (isa_1_needed != 0 || feature_1_and != 0) + if (needed_1 != 0 || isa_1_needed != 0 || feature_1_and != 0) { l->l_property = lc_property_valid; + l->l_1_needed = needed_1; l->l_x86_isa_1_needed = isa_1_needed; l->l_x86_feature_1_and = feature_1_and; } |