diff options
Diffstat (limited to 'sysdeps/powerpc/elf/start.c')
| -rw-r--r-- | sysdeps/powerpc/elf/start.c | 77 |
1 files changed, 45 insertions, 32 deletions
diff --git a/sysdeps/powerpc/elf/start.c b/sysdeps/powerpc/elf/start.c index 9b1cf1c026..001d6aa97c 100644 --- a/sysdeps/powerpc/elf/start.c +++ b/sysdeps/powerpc/elf/start.c @@ -26,22 +26,27 @@ /* Just a little assembler stub before gcc gets its hands on our stack pointer... */ asm ("\ - .text + .section \".text\" + .align 2 .globl _start _start: # save the stack pointer, in case we're statically linked under Linux - mr 8,1 + mr 8,1 # set up an initial stack frame, and clear the LR - addi 1,1,-16 - clrrwi 1,1,4 - li 0,0 - stw 0,0(1) - mtlr 0 + addi 1,1,-16 + clrrwi 1,1,4 + li 0,0 + stw 0,0(1) + mtlr 0 # set r13 to point at the 'small data area' - lis 13,_SDA_BASE_@ha - addi 13,13,_SDA_BASE_@l + lis 13,_SDA_BASE_@ha + addi 13,13,_SDA_BASE_@l # and continue below. - b __start1 + b __start1 +0: + .size _start,0b-_start + # undo '.section text'. + .previous "); /* Define a symbol for the first piece of initialized data. */ @@ -53,38 +58,46 @@ weak_alias (__data_start, data_start) void (*_mach_init_routine) (void); void (*_thread_init_routine) (void); -void __libc_init_first (int argc, char **argv, char **envp); -int main (int argc, char **argv, char **envp, void *auxvec); +extern void __libc_init_first (int argc, char **argv, char **envp); +extern int main (int argc, char **argv, char **envp, void *auxvec); #ifdef HAVE_INITFINI -void _init (void); -void _fini (void); +extern void _init (void); +extern void _fini (void); #endif - +#if 0 +/* I'd like to say this, but it causes GCC to strip the whole procedure + from the object file (this is sort of reasonable, because you've told + GCC that the procedure is unused). :-( */ static void __start1(int argc, char **argv, char **envp, - void *auxvec, void (*exitfn) (void), char **arguments) + void *auxvec, void (*exitfn) (void), + char **stack_on_entry) __attribute__ ((unused)); -static void + +static +#endif +void __start1(int argc, char **argv, char **envp, void *auxvec, void (*exitfn) (void), - char **arguments) + char **stack_on_entry) { /* the PPC SVR4 ABI says that the top thing on the stack will be a NULL pointer, so if not we assume that we're being called - as a statically-linked program by Linux. */ - int abi_compliant_startup = *arguments == NULL; - - if (!abi_compliant_startup) - { - argc = *(int *) arguments; - argv = arguments+1; - envp = argv+argc+1; - auxvec = envp; - while (auxvec != NULL) - auxvec++; - auxvec++; - exitfn = NULL; - } + as a statically-linked program by Linux... */ + if (*stack_on_entry != NULL) + { + /* ...in which case, we have argc as the top thing on the + stack, followed by argv (NULL-terminated), envp (likewise), + and the auxilary vector. */ + argc = *(int *) stack_on_entry; + argv = stack_on_entry + 1; + envp = argv + argc + 1; + auxvec = envp; + while (*(char **) auxvec != NULL) + ++auxvec; + ++auxvec; + exitfn = NULL; + } if (exitfn != NULL) atexit (exitfn); |