diff options
Diffstat (limited to 'newlib/libc/sys/sh/crt0.S')
| -rw-r--r-- | newlib/libc/sys/sh/crt0.S | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/newlib/libc/sys/sh/crt0.S b/newlib/libc/sys/sh/crt0.S index 88c9fac0d..6eccf3a4b 100644 --- a/newlib/libc/sys/sh/crt0.S +++ b/newlib/libc/sys/sh/crt0.S @@ -1,3 +1,69 @@ + +#ifdef __SH5__ + .section .data,"aw" + .global ___data +___data: + + .section .rodata,"a" + .global ___rodata +___rodata: + +#if __SH5__ == 64 + .section .text,"ax" +#define LOAD_ADDR(sym, reg) \ + movi (sym >> 48) & 65535, reg; \ + shori (sym >> 32) & 65535, reg; \ + shori (sym >> 16) & 65535, reg; \ + shori sym & 65535, reg +#else + .mode SHmedia + .section .text..SHmedia32,"ax" +#define LOAD_ADDR(sym, reg) \ + movi (sym >> 16) & 65535, reg; \ + shori sym & 65535, reg +#endif + .global start +start: + LOAD_ADDR (_stack, r15) + + pt/l zero_bss_loop, tr0 + pt/l _atexit, tr1 + pt/l _init, tr5 + pt/l _main, tr6 + pt/l _exit, tr7 + + ! zero out bss + LOAD_ADDR (_edata, r0) + LOAD_ADDR (_end, r1) +zero_bss_loop: + stx.q r0, r63, r63 + addi r0, 8, r0 + bgt/l r1, r0, tr0 + + LOAD_ADDR (___data, r26) + LOAD_ADDR (___rodata, r27) + +#if ! __SH4_NOFPU__ + getcon cr0, r0 + movi 1, r1 + shlli r1, 15, r1 + or r1, r0, r0 + putcon r0, cr0 +#endif + + ! arrange for exit to call fini + LOAD_ADDR (_fini, r2) + blink tr1, r18 + + ! call init + blink tr5, r18 + + ! call the mainline + blink tr6, r18 + + ! call exit + blink tr7, r18 +#else .section .text .global start start: @@ -46,6 +112,7 @@ main_k: .long _main exit_k: .long _exit +#endif #ifdef __ELF__ .section .stack,"aw" |