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tools/nolibc: Add support for SPARC
Add support for 32bit and 64bit SPARC to nolibc. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Acked-by: Willy Tarreau <w@1wt.eu> Tested-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> # UltraSparc T4 (Niagara4) Link: https://lore.kernel.org/lkml/20250322-nolibc-sparc-v2-1-89af018c6296@weissschuh.net/
This commit is contained in:
Thomas Weißschuh
parent
fd293cb81a
commit
8e1930296f
191
tools/include/nolibc/arch-sparc.h
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191
tools/include/nolibc/arch-sparc.h
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@ -0,0 +1,191 @@
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/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
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/*
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* SPARC (32bit and 64bit) specific definitions for NOLIBC
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* Copyright (C) 2025 Thomas Weißschuh <linux@weissschuh.net>
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*/
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#ifndef _NOLIBC_ARCH_SPARC_H
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#define _NOLIBC_ARCH_SPARC_H
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#include <linux/unistd.h>
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#include "compiler.h"
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#include "crt.h"
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/*
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* Syscalls for SPARC:
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* - registers are native word size
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* - syscall number is passed in g1
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* - arguments are in o0-o5
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* - the system call is performed by calling a trap instruction
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* - syscall return value is in o0
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* - syscall error flag is in the carry bit of the processor status register
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*/
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#ifdef __arch64__
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#define _NOLIBC_SYSCALL "t 0x6d\n" \
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"bcs,a %%xcc, 1f\n" \
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"sub %%g0, %%o0, %%o0\n" \
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"1:\n"
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#else
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#define _NOLIBC_SYSCALL "t 0x10\n" \
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"bcs,a 1f\n" \
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"sub %%g0, %%o0, %%o0\n" \
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"1:\n"
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#endif /* __arch64__ */
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#define my_syscall0(num) \
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({ \
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register long _num __asm__ ("g1") = (num); \
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register long _arg1 __asm__ ("o0"); \
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\
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__asm__ volatile ( \
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_NOLIBC_SYSCALL \
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: "+r"(_arg1) \
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: "r"(_num) \
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: "memory", "cc" \
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); \
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_arg1; \
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})
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#define my_syscall1(num, arg1) \
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({ \
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register long _num __asm__ ("g1") = (num); \
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register long _arg1 __asm__ ("o0") = (long)(arg1); \
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\
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__asm__ volatile ( \
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_NOLIBC_SYSCALL \
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: "+r"(_arg1) \
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: "r"(_num) \
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: "memory", "cc" \
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); \
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_arg1; \
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})
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#define my_syscall2(num, arg1, arg2) \
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({ \
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register long _num __asm__ ("g1") = (num); \
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register long _arg1 __asm__ ("o0") = (long)(arg1); \
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register long _arg2 __asm__ ("o1") = (long)(arg2); \
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\
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__asm__ volatile ( \
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_NOLIBC_SYSCALL \
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: "+r"(_arg1) \
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: "r"(_arg2), "r"(_num) \
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: "memory", "cc" \
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); \
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_arg1; \
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})
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#define my_syscall3(num, arg1, arg2, arg3) \
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({ \
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register long _num __asm__ ("g1") = (num); \
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register long _arg1 __asm__ ("o0") = (long)(arg1); \
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register long _arg2 __asm__ ("o1") = (long)(arg2); \
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register long _arg3 __asm__ ("o2") = (long)(arg3); \
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\
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__asm__ volatile ( \
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_NOLIBC_SYSCALL \
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: "+r"(_arg1) \
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: "r"(_arg2), "r"(_arg3), "r"(_num) \
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: "memory", "cc" \
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); \
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_arg1; \
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})
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#define my_syscall4(num, arg1, arg2, arg3, arg4) \
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({ \
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register long _num __asm__ ("g1") = (num); \
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register long _arg1 __asm__ ("o0") = (long)(arg1); \
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register long _arg2 __asm__ ("o1") = (long)(arg2); \
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register long _arg3 __asm__ ("o2") = (long)(arg3); \
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register long _arg4 __asm__ ("o3") = (long)(arg4); \
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\
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__asm__ volatile ( \
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_NOLIBC_SYSCALL \
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: "+r"(_arg1) \
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: "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_num) \
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: "memory", "cc" \
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); \
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_arg1; \
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})
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#define my_syscall5(num, arg1, arg2, arg3, arg4, arg5) \
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({ \
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register long _num __asm__ ("g1") = (num); \
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register long _arg1 __asm__ ("o0") = (long)(arg1); \
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register long _arg2 __asm__ ("o1") = (long)(arg2); \
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register long _arg3 __asm__ ("o2") = (long)(arg3); \
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register long _arg4 __asm__ ("o3") = (long)(arg4); \
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register long _arg5 __asm__ ("o4") = (long)(arg5); \
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\
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__asm__ volatile ( \
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_NOLIBC_SYSCALL \
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: "+r"(_arg1) \
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: "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), "r"(_num) \
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: "memory", "cc" \
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); \
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_arg1; \
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})
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#define my_syscall6(num, arg1, arg2, arg3, arg4, arg5, arg6) \
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({ \
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register long _num __asm__ ("g1") = (num); \
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register long _arg1 __asm__ ("o0") = (long)(arg1); \
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register long _arg2 __asm__ ("o1") = (long)(arg2); \
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register long _arg3 __asm__ ("o2") = (long)(arg3); \
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register long _arg4 __asm__ ("o3") = (long)(arg4); \
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register long _arg5 __asm__ ("o4") = (long)(arg5); \
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register long _arg6 __asm__ ("o5") = (long)(arg6); \
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\
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__asm__ volatile ( \
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_NOLIBC_SYSCALL \
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: "+r"(_arg1) \
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: "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), "r"(_arg6), \
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"r"(_num) \
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: "memory", "cc" \
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); \
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_arg1; \
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})
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/* startup code */
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void __attribute__((weak, noreturn)) __nolibc_entrypoint __no_stack_protector _start(void)
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{
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__asm__ volatile (
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/*
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* Save argc pointer to o0, as arg1 of _start_c.
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* Account for the window save area, which is 16 registers wide.
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*/
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#ifdef __arch64__
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"add %sp, 128 + 2047, %o0\n" /* on sparc64 / v9 the stack is offset by 2047 */
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#else
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"add %sp, 64, %o0\n"
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#endif
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"b,a _start_c\n" /* transfer to c runtime */
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);
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__nolibc_entrypoint_epilogue();
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}
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static pid_t getpid(void);
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static __attribute__((unused))
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pid_t sys_fork(void)
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{
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pid_t parent, ret;
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parent = getpid();
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ret = my_syscall0(__NR_fork);
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/* The syscall returns the parent pid in the child instead of 0 */
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if (ret == parent)
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return 0;
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else
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return ret;
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}
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#define sys_fork sys_fork
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#endif /* _NOLIBC_ARCH_SPARC_H */
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@ -33,6 +33,8 @@
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#include "arch-s390.h"
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#include "arch-s390.h"
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#elif defined(__loongarch__)
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#elif defined(__loongarch__)
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#include "arch-loongarch.h"
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#include "arch-loongarch.h"
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#elif defined(__sparc__)
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#include "arch-sparc.h"
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#else
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#else
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#error Unsupported Architecture
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#error Unsupported Architecture
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#endif
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#endif
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@ -56,6 +56,8 @@ ARCH_mips32be = mips
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ARCH_riscv32 = riscv
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ARCH_riscv32 = riscv
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ARCH_riscv64 = riscv
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ARCH_riscv64 = riscv
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ARCH_s390x = s390
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ARCH_s390x = s390
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ARCH_sparc32 = sparc
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ARCH_sparc64 = sparc
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ARCH := $(or $(ARCH_$(XARCH)),$(XARCH))
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ARCH := $(or $(ARCH_$(XARCH)),$(XARCH))
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# kernel image names by architecture
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# kernel image names by architecture
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@ -76,6 +78,8 @@ IMAGE_riscv64 = arch/riscv/boot/Image
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IMAGE_s390x = arch/s390/boot/bzImage
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IMAGE_s390x = arch/s390/boot/bzImage
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IMAGE_s390 = arch/s390/boot/bzImage
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IMAGE_s390 = arch/s390/boot/bzImage
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IMAGE_loongarch = arch/loongarch/boot/vmlinuz.efi
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IMAGE_loongarch = arch/loongarch/boot/vmlinuz.efi
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IMAGE_sparc32 = arch/sparc/boot/image
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IMAGE_sparc64 = arch/sparc/boot/image
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IMAGE = $(objtree)/$(IMAGE_$(XARCH))
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IMAGE = $(objtree)/$(IMAGE_$(XARCH))
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IMAGE_NAME = $(notdir $(IMAGE))
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IMAGE_NAME = $(notdir $(IMAGE))
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@ -97,6 +101,8 @@ DEFCONFIG_riscv64 = defconfig
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DEFCONFIG_s390x = defconfig
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DEFCONFIG_s390x = defconfig
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DEFCONFIG_s390 = defconfig compat.config
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DEFCONFIG_s390 = defconfig compat.config
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DEFCONFIG_loongarch = defconfig
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DEFCONFIG_loongarch = defconfig
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DEFCONFIG_sparc32 = sparc32_defconfig
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DEFCONFIG_sparc64 = sparc64_defconfig
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DEFCONFIG = $(DEFCONFIG_$(XARCH))
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DEFCONFIG = $(DEFCONFIG_$(XARCH))
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EXTRACONFIG = $(EXTRACONFIG_$(XARCH))
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EXTRACONFIG = $(EXTRACONFIG_$(XARCH))
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@ -122,6 +128,8 @@ QEMU_ARCH_riscv64 = riscv64
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QEMU_ARCH_s390x = s390x
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QEMU_ARCH_s390x = s390x
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QEMU_ARCH_s390 = s390x
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QEMU_ARCH_s390 = s390x
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QEMU_ARCH_loongarch = loongarch64
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QEMU_ARCH_loongarch = loongarch64
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QEMU_ARCH_sparc32 = sparc
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QEMU_ARCH_sparc64 = sparc64
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QEMU_ARCH = $(QEMU_ARCH_$(XARCH))
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QEMU_ARCH = $(QEMU_ARCH_$(XARCH))
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QEMU_ARCH_USER_ppc64le = ppc64le
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QEMU_ARCH_USER_ppc64le = ppc64le
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@ -152,6 +160,8 @@ QEMU_ARGS_riscv64 = -M virt -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_T
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QEMU_ARGS_s390x = -M s390-ccw-virtio -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
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QEMU_ARGS_s390x = -M s390-ccw-virtio -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
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QEMU_ARGS_s390 = -M s390-ccw-virtio -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
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QEMU_ARGS_s390 = -M s390-ccw-virtio -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
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QEMU_ARGS_loongarch = -M virt -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
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QEMU_ARGS_loongarch = -M virt -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
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QEMU_ARGS_sparc32 = -M SS-5 -m 256M -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
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QEMU_ARGS_sparc64 = -M sun4u -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
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QEMU_ARGS = -m 1G $(QEMU_ARGS_$(XARCH)) $(QEMU_ARGS_BIOS) $(QEMU_ARGS_EXTRA)
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QEMU_ARGS = -m 1G $(QEMU_ARGS_$(XARCH)) $(QEMU_ARGS_BIOS) $(QEMU_ARGS_EXTRA)
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# OUTPUT is only set when run from the main makefile, otherwise
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# OUTPUT is only set when run from the main makefile, otherwise
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@ -174,6 +184,7 @@ CFLAGS_s390x = -m64
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CFLAGS_s390 = -m31
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CFLAGS_s390 = -m31
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CFLAGS_mips32le = -EL -mabi=32 -fPIC
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CFLAGS_mips32le = -EL -mabi=32 -fPIC
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CFLAGS_mips32be = -EB -mabi=32
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CFLAGS_mips32be = -EB -mabi=32
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CFLAGS_sparc32 = $(call cc-option,-m32)
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ifeq ($(origin XARCH),command line)
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ifeq ($(origin XARCH),command line)
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CFLAGS_XARCH = $(CFLAGS_$(XARCH))
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CFLAGS_XARCH = $(CFLAGS_$(XARCH))
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endif
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endif
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@ -25,6 +25,7 @@ all_archs=(
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riscv32 riscv64
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riscv32 riscv64
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s390x s390
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s390x s390
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loongarch
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loongarch
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sparc32 sparc64
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)
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)
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archs="${all_archs[@]}"
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archs="${all_archs[@]}"
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@ -111,6 +112,7 @@ crosstool_arch() {
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loongarch) echo loongarch64;;
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loongarch) echo loongarch64;;
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mips*) echo mips;;
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mips*) echo mips;;
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s390*) echo s390;;
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s390*) echo s390;;
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sparc*) echo sparc64;;
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*) echo "$1";;
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*) echo "$1";;
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esac
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esac
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}
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}
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