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Don't fake the TVECT value on non-BeOS native systems. This is important

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for systems that use a global r2 as the TLS register, e.g. Linux/ppc with
newer glibc. Also remove the syscall junk which were simply workarounds
for this bug. Remove a duplicate r2 restoration in EmulOp.

BTW, it's possible to get SheepShaver running on Linux/ppc systems with
NPTL rather than SheepThreads.
This commit is contained in:
gbeauche 2005-06-23 16:23:31 +00:00
parent b9b90fce11
commit 26ee263b6f
3 changed files with 3 additions and 58 deletions
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4
SheepShaver/src/Unix/main_unix.cpp
View File

@ -286,8 +286,8 @@ static inline int sig_stack_release(void)
// Global variables (exported)
#if !EMULATED_PPC
void *TOC; // Pointer to Thread Local Storage (r2)
void *R13; // Pointer to .sdata section (r13 under Linux)
void *TOC = NULL; // Pointer to Thread Local Storage (r2)
void *R13 = NULL; // Pointer to .sdata section (r13 under Linux)
#endif
uint32 RAMBase; // Base address of Mac RAM
uint32 RAMSize; // Size of Mac RAM

55
SheepShaver/src/Unix/ppc_asm.S
View File

@ -381,7 +381,6 @@ C_SYMBOL_NAME(jump_to_rom):
stw r0,16(r1)
stw r2,12(r1)
stwu r1,-(24+16*4+15*8)(r1)
RESTORE_SYSTEM_R2
// Save 68k registers (M68kRegisters)
stw r8,24+0*4(r1) // d[0]..d[7]
@ -916,57 +915,3 @@ C_SYMBOL_NAME(ppc_interrupt):
// Enter nanokernel
mtlr r3
blr
/*
* Glue for glibc with TLS support which clobbers r2
*
* The following is derived from dietlibc and only provides
* pass-through to kernel syscalls. You also lose asynchronous
* cancellation support.
*/
#if defined(__linux__)
#define __NR_getpid 20
#define __NR__newselect 142
#define syscall_weak(name,wsym,sym) \
.text; \
.type wsym,@function; \
.weak wsym; \
wsym: ; \
.type sym,@function; \
.global sym; \
sym: \
li 0,__NR_##name; \
b __unified_syscall
#define syscall(name,sym) \
.text; \
.type sym,@function; \
.global sym; \
sym: \
li 0,__NR_##name; \
b __unified_syscall
.type __unified_syscall,@function
__unified_syscall:
sc
bnslr+
stwu 1,-16(1)
mflr 0
stw 0,20(1)
stw 3,12(1)
bl __errno_location
lwz 0,12(1)
stw 0,0(3)
lwz 0,20(1)
mtlr 0
addi 1,1,16
blr
/* name weak symbol symbol */
syscall( getpid, getpid)
syscall_weak( _newselect, select, __select)
#endif

2
SheepShaver/src/thunks.cpp
View File

@ -219,7 +219,7 @@ bool ThunksInit(void)
#define DEFINE_NATIVE_OP(ID, FUNC) do { \
uintptr base = SheepMem::Reserve(8); \
WriteMacInt32(base + 0, (uint32)FUNC); \
WriteMacInt32(base + 4, 0); /*Fake TVECT*/ \
WriteMacInt32(base + 4, (uint32)TOC); \
native_op[ID].tvect = base; \
native_op[ID].func = (uint32)FUNC; \
} while (0)