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Move most of OS_FIND_EXPORT{,_EX} into a function

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This brought the file size of os_functions.o (compiled at -O2, not stripped)
from 15K to 9.7K. Section sizes changed in the following ways:

        .text  .rela.text  .data  .rodata.str1.4  .syntab  .strtab  .shstrtab
before   5660        2928    276            3111     1264     1255         89
after    2860        2376    276            1175     1296     1294         89

The most obvious win is due to not including two strings per imported function
("OSFoo" and "Function OSFoo is NULL") in the .rodata section anymore, but
outlining the error-handling code also reduced the size of .text significantly.
This commit is contained in:
Jonathan Neuschäfer 2017-04-24 05:41:13 +02:00
parent 81b1a92727
commit 775993a09b
2 changed files with 37 additions and 11 deletions
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33
os_functions.c
View File

@ -149,9 +149,40 @@ EXPORT_DECL(s32, IOS_Ioctl,s32 fd, u32 request, void *input_buffer,u32 input_buf
EXPORT_DECL(s32, IOS_Open,char *path, u32 mode);
EXPORT_DECL(s32, IOS_Close,s32 fd);
void _os_find_export(u32 handle, const char *funcName, void *funcPointer)
{
OSDynLoad_FindExport(handle, 0, funcName, funcPointer);
if(!*(u32 *)funcPointer) {
/*
* This is effectively OSFatal("Function %s is NULL", funcName),
* but we can't rely on any library functions like snprintf or
* strcpy at this point.
*
* Buffer bounds are not checked. Beware!
*/
char buf[256], *bufp = buf;
const char a[] = "Function ", b[] = " is NULL", *p;
int i;
for (i = 0; i < sizeof(a) - 1; i++)
*bufp++ = a[i];
for (p = funcName; *p; p++)
*bufp++ = *p;
for (i = 0; i < sizeof(b) - 1; i++)
*bufp++ = b[i];
*bufp++ = '\0';
OSFatal(buf);
}
}
void InitAcquireOS(void)
{
//!----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
//!----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
//! Lib handle functions
//!----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
EXPORT_FUNC_WRITE(OSDynLoad_Acquire, (s32 (*)(const char*, unsigned *))OS_SPECIFICS->addr_OSDynLoad_Acquire);

15
os_functions.h
View File

@ -49,25 +49,20 @@ extern "C" {
#define EXPORT_FUNC_WRITE(func, val) *(u32*)(((u32)&func) + 0) = (u32)val
#define OS_FIND_EXPORT(handle, func) funcPointer = 0; \
OSDynLoad_FindExport(handle, 0, # func, &funcPointer); \
if(!funcPointer) \
OSFatal("Function " # func " is NULL"); \
#define OS_FIND_EXPORT(handle, func) _os_find_export(handle, # func, &funcPointer); \
EXPORT_FUNC_WRITE(func, funcPointer);
#define OS_FIND_EXPORT_EX(handle, func, func_p) \
funcPointer = 0; \
OSDynLoad_FindExport(handle, 0, # func, &funcPointer); \
if(!funcPointer) \
OSFatal("Function " # func " is NULL"); \
_os_find_export(handle, # func, &funcPointer); \
EXPORT_FUNC_WRITE(func_p, funcPointer);
#define OS_MUTEX_SIZE 44
/* Handle for coreinit */
extern u32 coreinit_handle;
void InitOSFunctionPointers(void);
void InitAcquireOS(void);
extern void _os_find_export(u32 handle, const char *funcName, void *funcPointer);
extern void InitAcquireOS(void);
extern void InitOSFunctionPointers(void);
//!----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
//! Lib handle functions