[Scummvm-cvs-logs] SF.net SVN: scummvm:[50903] scummvm/branches/gsoc2010-plugins/backends/ platform/ps2
toneman1138 at users.sourceforge.net
toneman1138 at users.sourceforge.net
Thu Jul 15 04:45:49 CEST 2010
Revision: 50903
http://scummvm.svn.sourceforge.net/scummvm/?rev=50903&view=rev
Author: toneman1138
Date: 2010-07-15 02:45:49 +0000 (Thu, 15 Jul 2010)
Log Message:
-----------
restructured ps2loader to use Common::SeekableReadStream instead of a file descriptor
Modified Paths:
--------------
scummvm/branches/gsoc2010-plugins/backends/platform/ps2/ps2loader.cpp
scummvm/branches/gsoc2010-plugins/backends/platform/ps2/ps2loader.h
Modified: scummvm/branches/gsoc2010-plugins/backends/platform/ps2/ps2loader.cpp
===================================================================
--- scummvm/branches/gsoc2010-plugins/backends/platform/ps2/ps2loader.cpp 2010-07-15 01:48:28 UTC (rev 50902)
+++ scummvm/branches/gsoc2010-plugins/backends/platform/ps2/ps2loader.cpp 2010-07-15 02:45:49 UTC (rev 50903)
@@ -76,13 +76,13 @@
/**
* Follow the instruction of a relocation section.
*
- * @param fd File Descriptor
+ * @param DLFile SeekableReadStream of File
* @param offset Offset into the File
* @param size Size of relocation section
* @param relSegment Base address of relocated segment in memory (memory offset)
*
*/
-bool DLObject::relocate(int fd, unsigned long offset, unsigned long size, void *relSegment) {
+bool DLObject::relocate(Common::SeekableReadStream* DLFile, unsigned long offset, unsigned long size, void *relSegment) {
Elf32_Rel *rel = NULL; // relocation entry
// Allocate memory for relocation table
@@ -92,8 +92,8 @@
}
// Read in our relocation table
- if (lseek(fd, offset, SEEK_SET) < 0 ||
- read(fd, rel, size) != (ssize_t)size) {
+ if (DLFile->seek(offset, SEEK_SET) < 0 ||
+ DLFile->read(rel, size) != (ssize_t)size) {
seterror("Relocation table load failed.");
free(rel);
return false;
@@ -266,9 +266,9 @@
return true;
}
-bool DLObject::readElfHeader(int fd, Elf32_Ehdr *ehdr) {
+bool DLObject::readElfHeader(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr) {
// Start reading the elf header. Check for errors
- if (read(fd, ehdr, sizeof(*ehdr)) != sizeof(*ehdr) ||
+ if (DLFile->read(ehdr, sizeof(*ehdr)) != sizeof(*ehdr) ||
memcmp(ehdr->e_ident, ELFMAG, SELFMAG) || // Check MAGIC
ehdr->e_type != ET_EXEC || // Check for executable
ehdr->e_machine != EM_MIPS || // Check for MIPS machine type
@@ -284,10 +284,10 @@
return true;
}
-bool DLObject::readProgramHeaders(int fd, Elf32_Ehdr *ehdr, Elf32_Phdr *phdr, int num) {
+bool DLObject::readProgramHeaders(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Phdr *phdr, int num) {
// Read program header
- if (lseek(fd, ehdr->e_phoff + sizeof(*phdr)*num, SEEK_SET) < 0 ||
- read(fd, phdr, sizeof(*phdr)) != sizeof(*phdr)) {
+ if (DLFile->seek(ehdr->e_phoff + sizeof(*phdr)*num, SEEK_SET) < 0 ||
+ DLFile->read(phdr, sizeof(*phdr)) != sizeof(*phdr)) {
seterror("Program header load failed.");
return false;
}
@@ -305,7 +305,7 @@
}
-bool DLObject::loadSegment(int fd, Elf32_Phdr *phdr) {
+bool DLObject::loadSegment(Common::SeekableReadStream* DLFile, Elf32_Phdr *phdr) {
char *baseAddress = 0;
@@ -342,8 +342,8 @@
memset(baseAddress + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
}
// Read the segment into memory
- if (lseek(fd, phdr->p_offset, SEEK_SET) < 0 ||
- read(fd, baseAddress, phdr->p_filesz) != (ssize_t)phdr->p_filesz) {
+ if (DLFile->seek(phdr->p_offset, SEEK_SET) < 0 ||
+ DLFile->read(baseAddress, phdr->p_filesz) != (ssize_t)phdr->p_filesz) {
seterror("Segment load failed.");
return false;
}
@@ -352,7 +352,7 @@
}
-Elf32_Shdr * DLObject::loadSectionHeaders(int fd, Elf32_Ehdr *ehdr) {
+Elf32_Shdr * DLObject::loadSectionHeaders(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr) {
Elf32_Shdr *shdr = NULL;
@@ -363,8 +363,8 @@
}
// Read from file into section headers
- if (lseek(fd, ehdr->e_shoff, SEEK_SET) < 0 ||
- read(fd, shdr, ehdr->e_shnum * sizeof(*shdr)) !=
+ if (DLFile->seek(ehdr->e_shoff, SEEK_SET) < 0 ||
+ DLFile->read(shdr, ehdr->e_shnum * sizeof(*shdr)) !=
(ssize_t)(ehdr->e_shnum * sizeof(*shdr))) {
seterror("Section headers load failed.");
return NULL;
@@ -373,7 +373,7 @@
return shdr;
}
-int DLObject::loadSymbolTable(int fd, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) {
+int DLObject::loadSymbolTable(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) {
// Loop over sections, looking for symbol table linked to a string table
for (int i = 0; i < ehdr->e_shnum; i++) {
@@ -404,8 +404,8 @@
}
// Read symbol table into memory
- if (lseek(fd, shdr[_symtab_sect].sh_offset, SEEK_SET) < 0 ||
- read(fd, _symtab, shdr[_symtab_sect].sh_size) !=
+ if (DLFile->seek(shdr[_symtab_sect].sh_offset, SEEK_SET) < 0 ||
+ DLFile->read(_symtab, shdr[_symtab_sect].sh_size) !=
(ssize_t)shdr[_symtab_sect].sh_size) {
seterror("Symbol table load failed.");
return -1;
@@ -419,7 +419,7 @@
}
-bool DLObject::loadStringTable(int fd, Elf32_Shdr *shdr) {
+bool DLObject::loadStringTable(Common::SeekableReadStream* DLFile, Elf32_Shdr *shdr) {
int string_sect = shdr[_symtab_sect].sh_link;
@@ -430,8 +430,8 @@
}
// Read string table into memory
- if (lseek(fd, shdr[string_sect].sh_offset, SEEK_SET) < 0 ||
- read(fd, _strtab, shdr[string_sect].sh_size) !=
+ if (DLFile->seek(shdr[string_sect].sh_offset, SEEK_SET) < 0 ||
+ DLFile->read(_strtab, shdr[string_sect].sh_size) !=
(ssize_t)shdr[string_sect].sh_size) {
seterror("Symbol table strings load failed.");
return false;
@@ -468,7 +468,7 @@
DBG("Relocated %d short symbols, %d others.\n", shortsCount, othersCount);
}
-bool DLObject::relocateRels(int fd, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) {
+bool DLObject::relocateRels(Common::SeekableReadStream* DLFile, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr) {
// Loop over sections, finding relocation sections
for (int i = 0; i < ehdr->e_shnum; i++) {
@@ -482,11 +482,11 @@
curShdr->sh_info < ehdr->e_shnum && // Check that the relocated section exists
(shdr[curShdr->sh_info].sh_flags & SHF_ALLOC)) { // Check if relocated section resides in memory
if (!ShortsMan.inGeneralSegment((char *)shdr[curShdr->sh_info].sh_addr)) { // regular segment
- if (!relocate(fd, curShdr->sh_offset, curShdr->sh_size, _segment)) {
+ if (!relocate(DLFile, curShdr->sh_offset, curShdr->sh_size, _segment)) {
return false;
}
} else { // In Shorts segment
- if (!relocate(fd, curShdr->sh_offset, curShdr->sh_size, (void *)_shortsSegment->getOffset())) {
+ if (!relocate(DLFile, curShdr->sh_offset, curShdr->sh_size, (void *)_shortsSegment->getOffset())) {
return false;
}
}
@@ -498,7 +498,7 @@
}
-bool DLObject::load(int fd) {
+bool DLObject::load(Common::SeekableReadStream* DLFile) {
fprintf(stderr, "In DLObject::load\n");
Elf32_Ehdr ehdr; // ELF header
@@ -506,7 +506,7 @@
Elf32_Shdr *shdr; // Section header
bool ret = true;
- if (readElfHeader(fd, &ehdr) == false) {
+ if (readElfHeader(DLFile, &ehdr) == false) {
return false;
}
@@ -514,26 +514,26 @@
fprintf(stderr, "Loading segment %d\n", i);
- if (readProgramHeaders(fd, &ehdr, &phdr, i) == false)
+ if (readProgramHeaders(DLFile, &ehdr, &phdr, i) == false)
return false;
- if (!loadSegment(fd, &phdr))
+ if (!loadSegment(DLFile, &phdr))
return false;
}
- if ((shdr = loadSectionHeaders(fd, &ehdr)) == NULL)
+ if ((shdr = loadSectionHeaders(DLFile, &ehdr)) == NULL)
ret = false;
- if (ret && ((_symtab_sect = loadSymbolTable(fd, &ehdr, shdr)) < 0))
+ if (ret && ((_symtab_sect = loadSymbolTable(DLFile, &ehdr, shdr)) < 0))
ret = false;
- if (ret && (loadStringTable(fd, shdr) == false))
+ if (ret && (loadStringTable(DLFile, shdr) == false))
ret = false;
if (ret)
relocateSymbols((Elf32_Addr)_segment, _shortsSegment->getOffset()); // Offset by our segment allocated address
- if (ret && (relocateRels(fd, &ehdr, shdr) == false))
+ if (ret && (relocateRels(DLFile, &ehdr, shdr) == false))
ret = false;
free(shdr);
@@ -542,7 +542,7 @@
}
bool DLObject::open(const char *path) {
- int fd;
+ Common::SeekableReadStream* DLFile;
void *ctors_start, *ctors_end;
DBG("open(\"%s\")\n", path);
@@ -551,26 +551,22 @@
_gpVal = (unsigned int) & _gp;
DBG("_gpVal is %x\n", _gpVal);
- //PS2 has no "PowerMan" for suspending the system.
- //PowerMan.beginCriticalSection();
+ Common::FSNode file(path);
- if ((fd = ::open(path, O_RDONLY)) < 0) {
+ if (!(DLFile = file.createReadStream())) {
seterror("%s not found.", path);
return false;
}
// Try to load and relocate
- if (!load(fd)) {
- ::close(fd);
+ if (!load(DLFile)) {
+ //::close(fd);
unload();
return false;
}
- ::close(fd);
+ //::close(fd);
- //PS2 has no "PowerMan" for suspending the system.
- //PowerMan.endCriticalSection();
-
// flush data cache
DBG("Flushing data cache");
FlushCache(0);
Modified: scummvm/branches/gsoc2010-plugins/backends/platform/ps2/ps2loader.h
===================================================================
--- scummvm/branches/gsoc2010-plugins/backends/platform/ps2/ps2loader.h 2010-07-15 01:48:28 UTC (rev 50902)
+++ scummvm/branches/gsoc2010-plugins/backends/platform/ps2/ps2loader.h 2010-07-15 02:45:49 UTC (rev 50903)
@@ -99,17 +99,17 @@
void seterror(const char *fmt, ...);
void unload();
- bool relocate(int fd, unsigned long offset, unsigned long size, void *);
- bool load(int fd);
+ bool relocate(Common::SeekableReadStream, unsigned long offset, unsigned long size, void *);
+ bool load(Common::SeekableReadStream);
- bool readElfHeader(int fd, Elf32_Ehdr *ehdr);
- bool readProgramHeaders(int fd, Elf32_Ehdr *ehdr, Elf32_Phdr *phdr, int num);
- bool loadSegment(int fd, Elf32_Phdr *phdr);
- Elf32_Shdr *loadSectionHeaders(int fd, Elf32_Ehdr *ehdr);
- int loadSymbolTable(int fd, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
- bool loadStringTable(int fd, Elf32_Shdr *shdr);
+ bool readElfHeader(Common::SeekableReadStream, Elf32_Ehdr *ehdr);
+ bool readProgramHeaders(Common::SeekableReadStream, Elf32_Ehdr *ehdr, Elf32_Phdr *phdr, int num);
+ bool loadSegment(Common::SeekableReadStream, Elf32_Phdr *phdr);
+ Elf32_Shdr *loadSectionHeaders(Common::SeekableReadStream, Elf32_Ehdr *ehdr);
+ int loadSymbolTable(Common::SeekableReadStream, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
+ bool loadStringTable(Common::SeekableReadStream, Elf32_Shdr *shdr);
void relocateSymbols(Elf32_Addr offset, Elf32_Addr shortsOffset);
- bool relocateRels(int fd, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
+ bool relocateRels(Common::SeekableReadStream, Elf32_Ehdr *ehdr, Elf32_Shdr *shdr);
public:
bool open(const char *path);
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