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Fix program loading bugs.

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This commit is contained in:
Jonas 'Sortie' Termansen 2016-01-08 00:41:20 +01:00
parent 48c6ccdf06
commit a45b93785c
1 changed files with 6 additions and 11 deletions
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17
kernel/process.cpp
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@ -794,12 +794,7 @@ bool Process::MapSegment(struct segment* result, void* hint, size_t size,
// process->segment_lock is held at this point.
if ( !size )
{
result->addr = 0x0;
result->size = 0x0;
result->prot = prot;
return true;
}
size = 1;
if ( !PlaceSegment(result, this, hint, size, flags) )
return false;
@ -919,9 +914,9 @@ int Process::Execute(const char* programname, const uint8_t* program,
kthread_mutex_unlock(&segment_lock);
kthread_mutex_unlock(&segment_write_lock);
char** target_argv = (char**) (arg_segment.addr + 0);
char** target_envp = (char**) (arg_segment.addr + argv_size);
char* target_strings = (char*) (arg_segment.addr + argv_size + envp_size);
char** target_argv = (char**) ((char*) arg_segment.addr + 0);
char** target_envp = (char**) ((char*) arg_segment.addr + argv_size);
char* target_strings = (char*) ((char*) arg_segment.addr + argv_size + envp_size);
size_t target_strings_offset = 0;
for ( int i = 0; i < argc; i++ )
@ -1195,7 +1190,7 @@ int sys_execve_kernel(const char* filename,
return sys_execve_free(&buffer_alloc), result;
size_t line_length = 0;
while ( line_length < filesize && buffer[2 + line_length] != '\n' )
while ( 2 + line_length < filesize && buffer[2 + line_length] != '\n' )
line_length++;
if ( line_length == filesize )
return sys_execve_free(&buffer_alloc), errno = ENOEXEC, -1;
@ -1228,7 +1223,7 @@ int sys_execve_kernel(const char* filename,
if ( INT_MAX - argc <= sb_argc )
return delete[] sb_argv, delete[] line, errno = EOVERFLOW, -1;
if ( !sb_argv[0][0] )
if ( !sb_argv[0] || !sb_argv[0][0] )
return delete[] sb_argv, delete[] line, errno = ENOENT, -1;
int new_argc = sb_argc + argc;