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Previously, the ELF linker would always just store the pointer to a

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filename passed in via the module loader functions in the GDB
"sharedlibrary" support structures.  This isn't good, since the pointer
would become stale in almost every case (not the pre-loaded case, of
course).

Change this to malloc()ed copy of the string and finally fix the reason
that gdb -k's "sharedlibrary" command stopped working.

Obtained from:	LOMAC/FreeBSD (cf. NAI Labs)
This commit is contained in:
Brian Feldman 2001-08-06 14:21:57 +00:00
parent f47a6dce89
commit bcc92693d4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=81201
2 changed files with 10 additions and 2 deletions
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6
sys/kern/link_elf.c
View File

@ -530,6 +530,7 @@ link_elf_load_file(linker_class_t cls, const char* filename, linker_file_t* resu
int symstrindex;
int symcnt;
int strcnt;
char *newfilename;
GIANT_REQUIRED;
@ -788,7 +789,9 @@ link_elf_load_file(linker_class_t cls, const char* filename, linker_file_t* resu
#ifdef DDB
GDB_STATE(RT_ADD);
ef->gdb.l_addr = lf->address;
ef->gdb.l_name = filename;
newfilename = malloc(strlen(filename) + 1, M_LINKER, M_WAITOK);
strcpy(newfilename, filename);
ef->gdb.l_name = (const char *)newfilename;
ef->gdb.l_ld = ef->dynamic;
link_elf_add_gdb(&ef->gdb);
GDB_STATE(RT_CONSISTENT);
@ -819,6 +822,7 @@ link_elf_unload_file(linker_file_t file)
#ifdef DDB
if (ef->gdb.l_ld) {
GDB_STATE(RT_DELETE);
free((void *)ef->gdb.l_name, M_LINKER);
link_elf_delete_gdb(&ef->gdb);
GDB_STATE(RT_CONSISTENT);
}

6
sys/kern/link_elf_obj.c
View File

@ -530,6 +530,7 @@ link_elf_load_file(linker_class_t cls, const char* filename, linker_file_t* resu
int symstrindex;
int symcnt;
int strcnt;
char *newfilename;
GIANT_REQUIRED;
@ -788,7 +789,9 @@ link_elf_load_file(linker_class_t cls, const char* filename, linker_file_t* resu
#ifdef DDB
GDB_STATE(RT_ADD);
ef->gdb.l_addr = lf->address;
ef->gdb.l_name = filename;
newfilename = malloc(strlen(filename) + 1, M_LINKER, M_WAITOK);
strcpy(newfilename, filename);
ef->gdb.l_name = (const char *)newfilename;
ef->gdb.l_ld = ef->dynamic;
link_elf_add_gdb(&ef->gdb);
GDB_STATE(RT_CONSISTENT);
@ -819,6 +822,7 @@ link_elf_unload_file(linker_file_t file)
#ifdef DDB
if (ef->gdb.l_ld) {
GDB_STATE(RT_DELETE);
free((void *)ef->gdb.l_name, M_LINKER);
link_elf_delete_gdb(&ef->gdb);
GDB_STATE(RT_CONSISTENT);
}