diff options
Diffstat (limited to 'libc/sysdeps/linux/csky/sysdep.h')
| -rw-r--r-- | libc/sysdeps/linux/csky/sysdep.h | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/csky/sysdep.h b/libc/sysdeps/linux/csky/sysdep.h new file mode 100644 index 000000000..2fcff684e --- /dev/null +++ b/libc/sysdeps/linux/csky/sysdep.h @@ -0,0 +1,204 @@ +#ifndef _LINUX_CSKY_SYSDEP_H +#define _LINUX_CSKY_SYSDEP_H 1 + +#include <common/sysdep.h> +#include <sys/syscall.h> + +#undef SYS_ify +#define SYS_ify(name) (__NR_##name) + +#ifdef __ASSEMBLER__ + +/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */ +#define ALIGNARG(log2) log2 +/* For ELF we need the `.type' directive to make shared libs work right. */ +#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,%##typearg; +#define ASM_SIZE_DIRECTIVE(name) .size name,.-name + +#define ENTRY(name) \ + .globl C_SYMBOL_NAME(name); \ + ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),function) \ + .align ALIGNARG(4); \ + C_LABEL(name) + +#undef END +#define END(name) ASM_SIZE_DIRECTIVE(name) + +#undef ret_ERRVAL +#define ret_ERRVAL rts + +#undef PSEUDO_END +#define PSEUDO_END(name) END(name) + +#ifdef __PIC__ +#define __GET_GB \ + bsr 1f; \ + 1: lrw gb, 1b@GOTPC; \ + addu gb, lr; + +/* + * __JSR must be used with __GET_GB and SAVE_ARGS + */ +#define __JSR(symbol) \ + lrw a2, symbol@PLT; \ + add a2, gb; \ + ld.w a2, (a2); \ + jsr a2; + +#define PSEUDO_ERRJMP \ + subi sp, 8; \ + st.w lr, (sp); \ + st.w gb, (sp, 4); \ + __GET_GB \ + lrw a2, __syscall_error@PLT; \ + addu a2, gb; \ + ld.w a2, (a2); \ + jsr a2; \ + ld.w lr, (sp); \ + ld.w gb, (sp, 4); \ + addi sp, 8; \ + rts; + +#else /* __PIC__ */ + +#define __GET_GB +#define __JSR(symbol) jsri symbol; +#define PSEUDO_ERRJMP \ + subi sp, 4; \ + stw lr, (sp, 0); \ + jsri __syscall_error; \ + ldw lr, (sp, 0); \ + addi sp, 4; \ + rts; + +#endif /* __PIC__ */ + +#define PSEUDO_ERRVAL(name, syscall_name, args) \ + .text; \ + 99: PSEUDO_ERRJMP; \ + ENTRY(name); \ + DO_CALL(syscall_name, args); \ + btsti a0, 31; \ + bt 99b; + +#undef PSEUDO_END_ERRVAL +#define PSEUDO_END_ERRVAL(name) \ + rts; \ + END(name) + +/* DO_CALL */ +#undef DO_CALL +#ifdef __CSKYABIV2__ + +#define DO_CALL(syscall_name, args) \ + DOARGS_##args \ + mov t0, r7; \ + lrw r7, SYS_ify (syscall_name); \ + trap 0; \ + mov r7, t0; \ + UNDOARGS_##args + +#define DOARGS_0 +#define DOARGS_1 +#define DOARGS_2 +#define DOARGS_3 +#define DOARGS_4 +#define DOARGS_5 subi sp, 4; st.w r4, (sp, 0); ld.w r4, (sp, 4); +#define DOARGS_6 subi sp, 8; stm r4-r5, (sp); ld.w r4, (sp, 8); ld.w r5, (sp, 12); + +#define UNDOARGS_0 +#define UNDOARGS_1 +#define UNDOARGS_2 +#define UNDOARGS_3 +#define UNDOARGS_4 +#define UNDOARGS_5 ld.w r4, (sp, 0); addi sp, 4; +#define UNDOARGS_6 ldm r4-r5, (sp); addi sp, 8; + +#else /* __CSKYABIV2__ */ + +#define DO_CALL(syscall_name, args) \ + lrw r1, SYS_ify (syscall_name); \ + trap 0; + +#define DOARGS_0 +#define DOARGS_1 +#define DOARGS_2 +#define DOARGS_3 +#define DOARGS_4 +#define DOARGS_5 +#define DOARGS_6 + +#define UNDOARGS_0 +#define UNDOARGS_1 +#define UNDOARGS_2 +#define UNDOARGS_3 +#define UNDOARGS_4 +#define UNDOARGS_5 +#define UNDOARGS_6 + +#endif /* __CSKYABIV2__ */ + +/* + * define DO_CALL_2, only ABIV2 need DO_CALL_2 + * to be quite different with DO_CALL, DO_CALL_2 need not save r7. + */ +#ifdef __CSKYABIV2__ +#undef DO_CALL_2 +#define DO_CALL_2(syscall_name, args) \ + DOARGS2_##args; \ + lrw r7, SYS_ify(syscall_name); \ + trap 0; \ + UNDOARGS2_##args +#undef DOARGS2_0 +#define DOARGS2_0 + +#undef DOARGS2_1 +#define DOARGS2_1 DOARGS2_0 +#undef DOARGS2_2 +#define DOARGS2_2 DOARGS2_0 +#undef DOARGS2_3 +#define DOARGS2_3 DOARGS2_0 +#undef DOARGS2_4 +#define DOARGS2_4 DOARGS2_0 +#undef DOARGS2_5 +#define DOARGS2_5 \ + subi sp, 8; \ + cfi_adjust_cfa_offset (8); \ + stw r4, (sp, 0); \ + ldw r4, (sp, 24) +#undef DOARGS2_6 +#define DOARGS2_6 \ + subi sp, 8; \ + cfi_adjust_cfa_offset (8); \ + stw r4, (sp, 0); \ + stw r5, (sp, 4); \ + ldw r4, (sp, 24); \ + ldw r5, (sp, 28) + +#undef UNDOARGS2_0 +#define UNDOARGS2_0 + +#undef UNDOARGS2_1 +#define UNDOARGS2_1 UNDOARGS2_0 +#undef UNDOARGS2_2 +#define UNDOARGS2_2 UNDOARGS2_0 +#undef UNDOARGS2_3 +#define UNDOARGS2_3 UNDOARGS2_0 +#undef UNDOARGS2_4 +#define UNDOARGS2_4 UNDOARGS2_0 +#undef UNDOARGS2_5 +#define UNDOARGS2_5 \ + ldw r4, (sp, 0); \ + addi sp, 8 + +#undef UNDOARGS2_6 +#define UNDOARGS2_6 \ + ldw r4, (sp, 0); \ + ldw r5, (sp, 4); \ + addi sp, 8 + +#endif /* __CSKYABIV2__ */ + +#endif /* __ASSEMBLER__ */ +#endif /* _LINUX_CSKY_SYSDEP_H */ + |