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Only use the cache after the early stage of loading. This is

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because calling mmap() etc. may use GOT which is not set up
yet. Use calloc() instead of mmap() in cases where this
was the case before (sparc64, powerpc, arm).

Submitted by:	Dimitry Andric (dimitry andric com)
Reviewed by:	kan
Approved by:	ed (mentor)
This commit is contained in:
Roman Divacky 2010-05-18 08:55:23 +00:00
parent f8c5fbf7c1
commit 1dfdc15bb0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=208256
6 changed files with 29 additions and 33 deletions
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11
libexec/rtld-elf/amd64/reloc.c
View File

@ -118,15 +118,16 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
const Elf_Rela *relalim;
const Elf_Rela *rela;
SymCache *cache;
int bytes = obj->nchains * sizeof(SymCache);
int r = -1;
/*
* The dynamic loader may be called from a thread, we have
* limited amounts of stack available so we cannot use alloca().
*/
cache = mmap(NULL, bytes, PROT_READ|PROT_WRITE, MAP_ANON, -1, 0);
if (cache == MAP_FAILED)
if (obj != obj_rtld) {
cache = calloc(obj->nchains, sizeof(SymCache));
/* No need to check for NULL here */
} else
cache = NULL;
relalim = (const Elf_Rela *) ((caddr_t) obj->rela + obj->relasize);
@ -322,8 +323,8 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
}
r = 0;
done:
if (cache)
munmap(cache, bytes);
if (cache != NULL)
free(cache);
return(r);
}

13
libexec/rtld-elf/arm/reloc.c
View File

@ -245,7 +245,6 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
const Elf_Rel *rellim;
const Elf_Rel *rel;
SymCache *cache;
int bytes = obj->nchains * sizeof(SymCache);
int r = -1;
/* The relocation for the dynamic loader has already been done. */
@ -255,10 +254,9 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
* The dynamic loader may be called from a thread, we have
* limited amounts of stack available so we cannot use alloca().
*/
cache = mmap(NULL, bytes, PROT_READ|PROT_WRITE, MAP_ANON, -1, 0);
if (cache == MAP_FAILED)
cache = NULL;
cache = calloc(obj->nchains, sizeof(SymCache));
/* No need to check for NULL here */
rellim = (const Elf_Rel *)((caddr_t)obj->rel + obj->relsize);
for (rel = obj->rel; rel < rellim; rel++) {
if (reloc_nonplt_object(obj, rel, cache) < 0)
@ -266,9 +264,8 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
}
r = 0;
done:
if (cache) {
munmap(cache, bytes);
}
if (cache != NULL)
free(cache);
return (r);
}

11
libexec/rtld-elf/i386/reloc.c
View File

@ -119,15 +119,16 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
const Elf_Rel *rellim;
const Elf_Rel *rel;
SymCache *cache;
int bytes = obj->nchains * sizeof(SymCache);
int r = -1;
/*
* The dynamic loader may be called from a thread, we have
* limited amounts of stack available so we cannot use alloca().
*/
cache = mmap(NULL, bytes, PROT_READ|PROT_WRITE, MAP_ANON, -1, 0);
if (cache == MAP_FAILED)
if (obj != obj_rtld) {
cache = calloc(obj->nchains, sizeof(SymCache));
/* No need to check for NULL here */
} else
cache = NULL;
rellim = (const Elf_Rel *) ((caddr_t) obj->rel + obj->relsize);
@ -273,8 +274,8 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
}
r = 0;
done:
if (cache)
munmap(cache, bytes);
if (cache != NULL)
free(cache);
return(r);
}

12
libexec/rtld-elf/powerpc/reloc.c
View File

@ -287,7 +287,6 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
const Elf_Rela *relalim;
const Elf_Rela *rela;
SymCache *cache;
int bytes = obj->nchains * sizeof(SymCache);
int r = -1;
/*
@ -295,10 +294,8 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
* limited amounts of stack available so we cannot use alloca().
*/
if (obj != obj_rtld) {
cache = mmap(NULL, bytes, PROT_READ|PROT_WRITE, MAP_ANON,
-1, 0);
if (cache == MAP_FAILED)
cache = NULL;
cache = calloc(obj->nchains, sizeof(SymCache));
/* No need to check for NULL here */
} else
cache = NULL;
@ -314,9 +311,8 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
}
r = 0;
done:
if (cache) {
munmap(cache, bytes);
}
if (cache != NULL)
free(cache);
return (r);
}

4
libexec/rtld-elf/rtld.c
View File

@ -3311,6 +3311,10 @@ allocate_module_tls(int index)
}
p = malloc(obj->tlssize);
if (p == NULL) {
_rtld_error("Cannot allocate TLS block for index %d", index);
die();
}
memcpy(p, obj->tlsinit, obj->tlsinitsize);
memset(p + obj->tlsinitsize, 0, obj->tlssize - obj->tlsinitsize);

11
libexec/rtld-elf/sparc64/reloc.c
View File

@ -254,7 +254,6 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
const Elf_Rela *relalim;
const Elf_Rela *rela;
SymCache *cache;
int bytes = obj->nchains * sizeof(SymCache);
int r = -1;
/*
@ -262,10 +261,8 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
* limited amounts of stack available so we cannot use alloca().
*/
if (obj != obj_rtld) {
cache = mmap(NULL, bytes, PROT_READ|PROT_WRITE, MAP_ANON,
-1, 0);
if (cache == MAP_FAILED)
cache = NULL;
cache = calloc(obj->nchains, sizeof(SymCache));
/* No need to check for NULL here */
} else
cache = NULL;
@ -276,8 +273,8 @@ reloc_non_plt(Obj_Entry *obj, Obj_Entry *obj_rtld)
}
r = 0;
done:
if (cache)
munmap(cache, bytes);
if (cache != NULL)
free(cache);
return (r);
}