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binfmt: Let binfmt_copyargv return error code

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so the caller can distinguish the empty argument and out of memory quickly

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao 2022-10-17 23:24:34 +08:00 committed by Masayuki Ishikawa
parent 774648de0f
commit 9f4bb7da97
3 changed files with 30 additions and 41 deletions
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10
binfmt/binfmt.h
View File

@ -95,7 +95,11 @@ int binfmt_dumpmodule(FAR const struct binary_s *bin);
*
****************************************************************************/
FAR char * const *binfmt_copyargv(FAR char * const *argv);
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
int binfmt_copyargv(FAR char * const **copy, FAR char * const *argv);
#else
# define binfmt_copyargv(copy, argv) (*(copy) = (argv), 0)
#endif
/****************************************************************************
* Name: binfmt_freeargv
@ -136,9 +140,9 @@ void binfmt_freeargv(FAR char * const *argv);
****************************************************************************/
#ifndef CONFIG_DISABLE_ENVIRON
# define binfmt_copyenv(envp) binfmt_copyargv(envp)
# define binfmt_copyenv(copy, envp) binfmt_copyargv(copy, envp)
#else
# define binfmt_copyenv(envp) (envp)
# define binfmt_copyenv(copy, envp) (*(copy) = (envp), 0)
#endif
/****************************************************************************

36
binfmt/binfmt_copyargv.c
View File

@ -33,7 +33,7 @@
#include "binfmt.h"
#ifndef CONFIG_BINFMT_DISABLE
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL) && !defined(CONFIG_BINFMT_DISABLE)
/****************************************************************************
* Pre-processor Definitions
@ -66,30 +66,26 @@
*
****************************************************************************/
FAR char * const *binfmt_copyargv(FAR char * const *argv)
int binfmt_copyargv(FAR char * const **copy, FAR char * const *argv)
{
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
FAR char **argvbuf = NULL;
FAR char *ptr;
size_t argvsize;
size_t argsize;
int nargs;
size_t argsize = 0;
int nargs = 0;
int i;
/* Get the number of arguments and the size of the argument list */
if (argv)
{
argsize = 0;
nargs = 0;
for (i = 0; argv[i]; i++)
{
/* Increment the size of the allocation with the size of the next
* string
*/
argsize += (strlen(argv[i]) + 1);
argsize += strlen(argv[i]) + 1;
nargs++;
/* This is a sanity check to prevent running away with an
@ -100,13 +96,12 @@ FAR char * const *binfmt_copyargv(FAR char * const *argv)
if (nargs > MAX_EXEC_ARGS)
{
berr("ERROR: Too many arguments: %lu\n",
(unsigned long)argvsize);
return NULL;
berr("ERROR: Too many arguments: %zu\n", argsize);
return -E2BIG;
}
}
binfo("args=%d argsize=%lu\n", nargs, (unsigned long)argsize);
binfo("args=%d argsize=%zu\n", nargs, argsize);
/* Allocate the argv array and an argument buffer */
@ -117,7 +112,7 @@ FAR char * const *binfmt_copyargv(FAR char * const *argv)
if (!ptr)
{
berr("ERROR: Failed to allocate the argument buffer\n");
return NULL;
return -ENOMEM;
}
/* Copy the argv list */
@ -138,13 +133,8 @@ FAR char * const *binfmt_copyargv(FAR char * const *argv)
}
}
return (FAR char * const *)argvbuf;
#else
/* Just return the caller's argv pointer */
return argv;
#endif
*copy = argvbuf;
return OK;
}
/****************************************************************************
@ -161,7 +151,6 @@ FAR char * const *binfmt_copyargv(FAR char * const *argv)
*
****************************************************************************/
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
void binfmt_freeargv(FAR char * const *argv)
{
/* Is there an allocated argument buffer */
@ -173,6 +162,5 @@ void binfmt_freeargv(FAR char * const *argv)
kmm_free((FAR char **)argv);
}
}
#endif
#endif /* !CONFIG_BINFMT_DISABLE */
#endif

21
binfmt/binfmt_execmodule.c
View File

@ -142,26 +142,23 @@ int exec_module(FAR const struct binary_s *binp,
return -ENOMEM;
}
if (argv)
ret = binfmt_copyargv(&argv, argv);
if (ret < 0)
{
argv = binfmt_copyargv(argv);
if (!argv)
{
ret = -ENOMEM;
goto errout_with_tcb;
}
}
/* Make a copy of the environment here */
if (envp || (envp = environ))
if (envp == NULL)
{
envp = binfmt_copyenv(envp);
if (!envp)
{
ret = -ENOMEM;
goto errout_with_args;
envp = environ;
}
ret = binfmt_copyenv(&envp, envp);
if (ret < 0)
{
goto errout_with_args;
}
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)