diff options
Diffstat (limited to 'libc/sysdeps/linux/bfin/crt1.S')
| -rw-r--r-- | libc/sysdeps/linux/bfin/crt1.S | 50 |
1 files changed, 24 insertions, 26 deletions
diff --git a/libc/sysdeps/linux/bfin/crt1.S b/libc/sysdeps/linux/bfin/crt1.S index 7b6a99de0..dd30370b3 100644 --- a/libc/sysdeps/linux/bfin/crt1.S +++ b/libc/sysdeps/linux/bfin/crt1.S @@ -6,7 +6,7 @@ */ /* When we enter this piece of code, the user stack looks like this: -* argc argument counter (integer) +* [SP] argc argument counter (integer) * argv[0] program name (pointer) * argv[1...N] program args (pointers) * NULL @@ -15,8 +15,9 @@ * When we are done here, we want * R0=argc -* R1=*argv[0] -* R2=*envp[0] +* R1=argv +* R2=__init +* SP=__fini */ #include <features.h> @@ -28,31 +29,20 @@ .global ___uClibc_main; .type ___uClibc_main,STT_FUNC; +#define __UCLIBC_CTOR_DTOR__ #if defined(__UCLIBC_CTOR_DTOR__) -.type __init,%function -.type __fini,%function -#else -.weak __init -.weak __fini +.weak __init; +.weak __fini; #endif -/* - When we enter, our stack looks like: - [ SP ] - [argc][argv]... - - Call ___uClibc_main(argc, argv, __init, __fini) - R0 R1 R2 stack - - Before we call main, we want: - [ SP ] - [fini][argc][argv] -*/ - __start: -/* clear the frame pointer */ +/* clear the frame pointer and the L registers. */ FP = 0; + L0 = 0; + L1 = 0; + L2 = 0; + L3 = 0; /* Load register R0 (argc) from the stack to its final resting place */ P0 = SP; @@ -61,14 +51,22 @@ __start: /* Copy argv pointer into R1 */ R1 = P0; +#if defined(__UCLIBC_CTOR_DTOR__) /* Load __init into R2 */ - R2 = __init; + R2.H = __init; + R2.L = __init; /* Load __fini onto the stack */ - P0 = __fini; - [SP--] = P0; + SP += -16; + R3.H = __fini; + R3.L = __fini; + [SP+12] = R3; +#else +/* Just fixup the stack */ + sp += -12; +#endif /* Ok, now run uClibc's main() -- shouldn't return */ - sp += -8; jump.l ___uClibc_main; + .size __start,.-__start |