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| author | H.J. Lu <hjl.tools@gmail.com> | 2021-12-09 18:24:37 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2022-01-03 05:16:03 -0800 |
| commit | 9288c92d0037745b940a90d59cbe102d4c218c26 (patch) | |
| tree | 4edc09f879a504a05bdef6a473982023b8c06e25 /sysdeps/mips | |
| parent | bd1616c6bee625a2726d0f8b477881b4b25697d8 (diff) | |
| download | glibc-9288c92d0037745b940a90d59cbe102d4c218c26.tar.gz glibc-9288c92d0037745b940a90d59cbe102d4c218c26.tar.xz glibc-9288c92d0037745b940a90d59cbe102d4c218c26.zip | |
elf: Add <dl-debug.h>
Add <dl-debug.h> to setup debugging entry in PT_DYNAMIC segment to support DT_DEBUG, DT_MIPS_RLD_MAP_REL and DT_MIPS_RLD_MAP. Tested on x86-64, x32 and i686 as well as with build-many-glibcs.py.
Diffstat (limited to 'sysdeps/mips')
| -rw-r--r-- | sysdeps/mips/dl-debug.h | 41 | ||||
| -rw-r--r-- | sysdeps/mips/dl-machine.h | 15 |
2 files changed, 41 insertions, 15 deletions
diff --git a/sysdeps/mips/dl-debug.h b/sysdeps/mips/dl-debug.h new file mode 100644 index 0000000000..c41329a617 --- /dev/null +++ b/sysdeps/mips/dl-debug.h @@ -0,0 +1,41 @@ +/* Debugging support. MIPS version. + Copyright (C) 2022 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef _DL_DEBUG_H +#define _DL_DEBUG_H + +/* If there is a DT_MIPS_RLD_MAP_REL or DT_MIPS_RLD_MAP entry in the + dynamic section, fill in the debug map pointer with the run-time + address of the r_debug structure. */ + +static inline void +__attribute ((always_inline)) +elf_setup_debug_entry (struct link_map *l, struct r_debug *r) +{ + if (l->l_info[DT_MIPS (RLD_MAP_REL)] != NULL) + { + char *ptr = (char *) l->l_info[DT_MIPS (RLD_MAP_REL)]; + ptr += l->l_info[DT_MIPS (RLD_MAP_REL)]->d_un.d_val; + *(ElfW(Addr) *) ptr = (ElfW(Addr)) r; + } + else if (l->l_info[DT_MIPS (RLD_MAP)] != NULL) + *(ElfW(Addr) *) (l->l_info[DT_MIPS (RLD_MAP)]->d_un.d_ptr) + = (ElfW(Addr)) r; +} + +#endif /* _DL_DEBUG_H */ diff --git a/sysdeps/mips/dl-machine.h b/sysdeps/mips/dl-machine.h index c7e8aa7cbc..7c12d70350 100644 --- a/sysdeps/mips/dl-machine.h +++ b/sysdeps/mips/dl-machine.h @@ -65,21 +65,6 @@ in l_info array. */ #define DT_MIPS(x) (DT_MIPS_##x - DT_LOPROC + DT_NUM) -/* If there is a DT_MIPS_RLD_MAP_REL or DT_MIPS_RLD_MAP entry in the dynamic - section, fill in the debug map pointer with the run-time address of the - r_debug structure. */ -#define ELF_MACHINE_DEBUG_SETUP(l,r) \ -do { if ((l)->l_info[DT_MIPS (RLD_MAP_REL)]) \ - { \ - char *ptr = (char *)(l)->l_info[DT_MIPS (RLD_MAP_REL)]; \ - ptr += (l)->l_info[DT_MIPS (RLD_MAP_REL)]->d_un.d_val; \ - *(ElfW(Addr) *)ptr = (ElfW(Addr)) (r); \ - } \ - else if ((l)->l_info[DT_MIPS (RLD_MAP)]) \ - *(ElfW(Addr) *)((l)->l_info[DT_MIPS (RLD_MAP)]->d_un.d_ptr) = \ - (ElfW(Addr)) (r); \ - } while (0) - #if ((defined __mips_nan2008 && !defined HAVE_MIPS_NAN2008) \ || (!defined __mips_nan2008 && defined HAVE_MIPS_NAN2008)) # error "Configuration inconsistency: __mips_nan2008 != HAVE_MIPS_NAN2008, overridden CFLAGS?" |