qiurui
/
glibc
mirror of git://sourceware.org/git/glibc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

hppa: Fix initialization of dp register [BZ 29635] 

After upgrading glibc to Debian 2.35-1, gdb faulted on
startup and dropped core in a function call in the main
application.  This was caused by not initializing the
global dp register for the main application early enough.

Restore the code to initialize dp in _dl_start_user.
It was removed when code was added to initialize dp in
elf_machine_runtime_setup.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
This commit is contained in:
John David Anglin 2022-10-01 19:49:25 +00:00
parent ba70f69598
commit b7bd94068e
1 changed files with 19 additions and 5 deletions
sysdeps/hppa
dl-machine.h

24
sysdeps/hppa/dl-machine.h
View File

@ -347,6 +347,16 @@ elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[],
its return value is the user program's entry point. */
#define RTLD_START \
/* Set up dp for any non-PIC lib constructors that may be called. */ \
static struct link_map * __attribute__((used)) \
set_dp (struct link_map *map) \
{ \
register Elf32_Addr dp asm ("%r27"); \
dp = D_PTR (map, l_info[DT_PLTGOT]); \
asm volatile ("" : : "r" (dp)); \
return map; \
} \
\
asm ( \
" .text\n" \
" .globl _start\n" \
@ -426,6 +436,13 @@ asm ( \
direct loader invocation. Thus, argc and argv must be \
reloaded from from _dl_argc and _dl_argv. */ \
\
/* Load main_map from _rtld_local and setup dp. */ \
" addil LT'_rtld_local,%r19\n" \
" ldw RT'_rtld_local(%r1),%r26\n" \
" bl set_dp, %r2\n" \
" ldw 0(%r26),%r26\n" \
" copy %ret0,%r26\n" \
\
/* Load argc from _dl_argc. */ \
" addil LT'_dl_argc,%r19\n" \
" ldw RT'_dl_argc(%r1),%r20\n" \
@ -438,13 +455,10 @@ asm ( \
" ldw 0(%r20),%r24\n" \
" stw %r24,-44(%sp)\n" \
\
/* Call _dl_init(main_map, argc, argv, envp). */ \
" addil LT'_rtld_local,%r19\n" \
" ldw RT'_rtld_local(%r1),%r26\n" \
" ldw 0(%r26),%r26\n" \
\
/* envp = argv + argc + 1 */ \
" sh2add %r25,%r24,%r23\n" \
\
/* Call _dl_init(main_map, argc, argv, envp). */ \
" bl _dl_init,%r2\n" \
" ldo 4(%r23),%r23\n" /* delay slot */ \
\