[klibc] [PATCH] add mips64 support
maximilian attems
maks at stro.at
Tue Mar 11 01:27:50 PDT 2014
thank you for the submission, below some question,
as the patch description is a bit minimal.
On Tue, Mar 11, 2014 at 02:21:32PM +0800, YunQiang Su wrote:
> From: Dejan Latinovic <Dejan.Latinovic at imgtec.com>
>
> ---
> usr/include/arch/mips64/klibc/archconfig.h | 3 +
> usr/include/arch/mips64/klibc/archsetjmp.h | 39 ++++++
> usr/include/arch/mips64/machine/asm.h | 76 ++++++++++
> usr/include/fcntl.h | 2 +-
> usr/include/sys/md.h | 1 +
> usr/include/sys/resource.h | 4 +-
touching any file outside the mips64 better has an explanation
or needs to be a separate patch.
> usr/klibc/arch/mips64/Kbuild | 13 +-
> usr/klibc/arch/mips64/crt0.S | 25 ++++
> usr/klibc/arch/mips64/klibc.ld | 214 +++++++++++++++++++++++++++++
this needs an explanation too, a bit more verbose than
"the ld header problem" I have zero idea what you are referring to.
It seems mips is the only other arch that does this too.
Why was this copied over?
> usr/klibc/arch/mips64/pipe.S | 15 ++
> usr/klibc/arch/mips64/setjmp.S | 80 +++++++++++
> usr/klibc/arch/mips64/syscall.S | 15 ++
> usr/klibc/arch/mips64/sysstub.ph | 29 ++++
> usr/klibc/arch/mips64/vfork.S | 15 ++
> 14 files changed, 528 insertions(+), 3 deletions(-)
> create mode 100644 usr/include/arch/mips64/klibc/archsetjmp.h
> create mode 100644 usr/include/arch/mips64/machine/asm.h
> create mode 100644 usr/klibc/arch/mips64/crt0.S
> create mode 100644 usr/klibc/arch/mips64/klibc.ld
> create mode 100644 usr/klibc/arch/mips64/pipe.S
> create mode 100644 usr/klibc/arch/mips64/setjmp.S
> create mode 100644 usr/klibc/arch/mips64/syscall.S
> create mode 100644 usr/klibc/arch/mips64/sysstub.ph
> create mode 100644 usr/klibc/arch/mips64/vfork.S
>
> diff --git a/usr/include/arch/mips64/klibc/archconfig.h b/usr/include/arch/mips64/klibc/archconfig.h
> index 4d856a5..b403090 100644
> --- a/usr/include/arch/mips64/klibc/archconfig.h
> +++ b/usr/include/arch/mips64/klibc/archconfig.h
> @@ -15,4 +15,7 @@
> /* We can use RT signals on MIPS */
> #define _KLIBC_USE_RT_SIG 1
>
> +/* MIPS has architecture-specific code for vfork() */
> +#define _KLIBC_REAL_VFORK 1
> +
> #endif /* _KLIBC_ARCHCONFIG_H */
> diff --git a/usr/include/arch/mips64/klibc/archsetjmp.h b/usr/include/arch/mips64/klibc/archsetjmp.h
> new file mode 100644
> index 0000000..1fbe83e
> --- /dev/null
> +++ b/usr/include/arch/mips64/klibc/archsetjmp.h
> @@ -0,0 +1,39 @@
> +/*
> + * arch/mips/include/klibc/archsetjmp.h
> + */
> +
> +#ifndef _KLIBC_ARCHSETJMP_H
> +#define _KLIBC_ARCHSETJMP_H
> +
> +struct __jmp_buf {
> + unsigned long __s0;
> + unsigned long __s1;
> + unsigned long __s2;
> + unsigned long __s3;
> + unsigned long __s4;
> + unsigned long __s5;
> + unsigned long __s6;
> + unsigned long __s7;
> + unsigned long __gp;
> + unsigned long __sp;
> + unsigned long __s8;
> + unsigned long __ra;
> + unsigned long __f20;
> + unsigned long __f21;
> + unsigned long __f22;
> + unsigned long __f23;
> + unsigned long __f24;
> + unsigned long __f25;
> + unsigned long __f26;
> + unsigned long __f27;
> + unsigned long __f28;
> + unsigned long __f29;
> + unsigned long __f30;
> + unsigned long __f31;
> + unsigned long __fcr31;
> + unsigned long __unused;
> +} __attribute__ ((aligned(8)));
> +
> +typedef struct __jmp_buf jmp_buf[1];
> +
> +#endif /* _KLIBC_ARCHSETJMP_H */
> diff --git a/usr/include/arch/mips64/machine/asm.h b/usr/include/arch/mips64/machine/asm.h
> new file mode 100644
> index 0000000..0b8cece
> --- /dev/null
> +++ b/usr/include/arch/mips64/machine/asm.h
> @@ -0,0 +1,76 @@
> +/*
> + * arch/mips/include/machine/asm.h
> + */
> +
> +#ifndef _MACHINE_ASM_H
> +#define _MACHINE_ASM_H
> +
> +/*
> + * Symbolic register names for 32 bit ABI
> + */
> +
> +#define zero $0 /* wired zero */
> +#define AT $1 /* assembler temp - uppercase because of ".set at" */
> +#define v0 $2 /* return value */
> +#define v1 $3
> +#define a0 $4 /* argument registers */
> +#define a1 $5
> +#define a2 $6
> +#define a3 $7
> +#define t0 $8 /* caller saved */
> +#define t1 $9
> +#define t2 $10
> +#define t3 $11
> +#define t4 $12
> +#define t5 $13
> +#define t6 $14
> +#define t7 $15
> +#define s0 $16 /* callee saved */
> +#define s1 $17
> +#define s2 $18
> +#define s3 $19
> +#define s4 $20
> +#define s5 $21
> +#define s6 $22
> +#define s7 $23
> +#define t8 $24 /* caller saved */
> +#define t9 $25
> +#define jp $25 /* PIC jump register */
> +#define k0 $26 /* kernel scratch */
> +#define k1 $27
> +#define gp $28 /* global pointer */
> +#define sp $29 /* stack pointer */
> +#define fp $30 /* frame pointer */
> +#define s8 $30 /* same like fp! */
> +#define ra $31 /* return address */
> +
> +/*
> + * LEAF - declare leaf routine
> + */
> +#define LEAF(symbol) \
> + .globl symbol; \
> + .align 2; \
> + .type symbol, at function; \
> + .ent symbol,0; \
> +symbol: .frame sp,0,ra
> +
> +
> +/*
> + * NESTED - declare nested routine entry point
> + */
> +#define NESTED(symbol, framesize, rpc) \
> + .globl symbol; \
> + .align 2; \
> + .type symbol, at function; \
> + .ent symbol,0; \
> +symbol: .frame sp, framesize, rpc
> +
> +/*
> + * END - mark end of function
> + */
> +#define END(function) \
> + .end function; \
> + .size function,.-function
> +
> +
> +#endif /* _MACHINE_ASM_H */
> diff --git a/usr/include/fcntl.h b/usr/include/fcntl.h
> index bbd6917..09ba2f2 100644
> --- a/usr/include/fcntl.h
> +++ b/usr/include/fcntl.h
> @@ -9,7 +9,7 @@
> #include <klibc/compiler.h>
> #include <klibc/seek.h>
> #include <sys/types.h>
> -#if defined(__mips__) && !defined(__mips64__)
> +#if defined(__mips__) && !defined(__mips64)
why is this needed?
> # include <klibc/archfcntl.h>
> #endif
> #include <linux/fcntl.h>
> diff --git a/usr/include/sys/md.h b/usr/include/sys/md.h
> index 184e4aa..7be8ead 100644
> --- a/usr/include/sys/md.h
> +++ b/usr/include/sys/md.h
> @@ -26,6 +26,7 @@
> #define LEVEL_FAULTY (-5)
> #define MAX_MD_DEVS 256 /* Max number of md dev */
>
> +#include <endian.h>
> #include <linux/raid/md_u.h>
> #include <linux/raid/md_p.h>
>
> diff --git a/usr/include/sys/resource.h b/usr/include/sys/resource.h
> index 5d8bd52..35398a7 100644
> --- a/usr/include/sys/resource.h
> +++ b/usr/include/sys/resource.h
> @@ -12,6 +12,8 @@
> __extern int getpriority(int, int);
> __extern int setpriority(int, int, int);
>
> -__extern int getrusage(int, struct rusage *);
> +#if !defined(__mips64)
> + __extern int getrusage(int, struct rusage *);
> +#endif
>
> #endif /* _SYS_RESOURCE_H */
> diff --git a/usr/klibc/arch/mips64/Kbuild b/usr/klibc/arch/mips64/Kbuild
> index 970c0f8..972e450 100644
> --- a/usr/klibc/arch/mips64/Kbuild
> +++ b/usr/klibc/arch/mips64/Kbuild
> @@ -1,3 +1,14 @@
> #
> -# klibc files for mips64
> +# klibc files for mips
> #
> +
> +klib-y := pipe.o vfork.o setjmp.o syscall.o
> +
> +klib-y += ../../libgcc/__clzsi2.o ../../libgcc/__ashldi3.o
> +klib-y += ../../libgcc/__ashrdi3.o ../../libgcc/__lshrdi3.o
> +klib-y += ../../libgcc/__divdi3.o ../../libgcc/__moddi3.o
> +klib-y += ../../libgcc/__udivdi3.o ../../libgcc/__umoddi3.o
> +klib-y += ../../libgcc/__udivmoddi4.o
> +
> +always := crt0.o
> +targets := crt0.o
> diff --git a/usr/klibc/arch/mips64/crt0.S b/usr/klibc/arch/mips64/crt0.S
> new file mode 100644
> index 0000000..142d9f2
> --- /dev/null
> +++ b/usr/klibc/arch/mips64/crt0.S
> @@ -0,0 +1,25 @@
> +#
> +# arch/mips/crt0.S
> +#
> +# Does arch-specific initialization and invokes __libc_init
> +# with the appropriate arguments.
> +#
> +# See __static_init.c or __shared_init.c for the expected
> +# arguments.
> +#
> +
> +#include <machine/asm.h>
> +
> +NESTED(__start, 32, sp)
> + subu sp, 32
> + sw zero, 16(sp)
> +
> + lui gp, %hi(_gp) # Initialize gp
> + addiu gp, gp, _gp
> +
> + addiu a0, sp, 32 # Pointer to ELF entry structure
> + move a1, v0 # Kernel-provided atexit() pointer
> +
> + jal __libc_init
> +
> + END(__start)
> diff --git a/usr/klibc/arch/mips64/klibc.ld b/usr/klibc/arch/mips64/klibc.ld
> new file mode 100644
> index 0000000..5a2a7a6
> --- /dev/null
> +++ b/usr/klibc/arch/mips64/klibc.ld
> @@ -0,0 +1,214 @@
> +/* Linker script for klibc.so, needed because of the the damned
> + GNU ld script headers problem */
> +
> +ENTRY(__start)
> +SECTIONS
> +{
> + /* Read-only sections, merged into text segment: */
> + /* This address needs to be reachable using normal inter-module
> + calls, and work on the memory models for this architecture */
> + /* 2 MB -- the normal starting point for text is 4 MB */
> + . = 0x00200400;
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> + . = ALIGN(8192);
> + /* Ensure the __preinit_array_start label is properly aligned. We
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> + the linker would then create the section even if it turns out to
> + be empty, which isn't pretty. */
> + . = ALIGN(32 / 8);
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> + .got : { *(.got.plt) *(.got) }
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> diff --git a/usr/klibc/arch/mips64/pipe.S b/usr/klibc/arch/mips64/pipe.S
> new file mode 100644
> index 0000000..932fc08
> --- /dev/null
> +++ b/usr/klibc/arch/mips64/pipe.S
> @@ -0,0 +1,15 @@
> +#include <machine/asm.h>
> +#include <asm/unistd.h>
> +
> +LEAF(pipe)
> + li v0, __NR_pipe
> + syscall
> + bnez a3, 1f
> + sw v0, (a0)
> + sw v1, 4(a0)
> + li v0, 0
> + b 2f
> +1: sw v0, errno
> + li v0, -1
> +2: jr ra
> + END(pipe)
> diff --git a/usr/klibc/arch/mips64/setjmp.S b/usr/klibc/arch/mips64/setjmp.S
> new file mode 100644
> index 0000000..68eed19
> --- /dev/null
> +++ b/usr/klibc/arch/mips64/setjmp.S
> @@ -0,0 +1,80 @@
> +#
> +# arch/mips/setjmp.S
> +#
> +# setjmp/longjmp for the MIPS architecture
> +#
> +# The jmp_buf is assumed to contain the following, in order:
> +# s0..s7
> +# gp
> +# sp
> +# s8
> +# ra
> +# f20..f31
> +# fcr31
> +#
> +
> +#include <machine/asm.h>
> +
> +LEAF(setjmp)
> + sw s0, 0(a0)
> + sw s1, 4(a0)
> + sw s2, 8(a0)
> + sw s3, 12(a0)
> + sw s4, 16(a0)
> + sw s5, 20(a0)
> + sw s6, 24(a0)
> + sw s7, 28(a0)
> + sw gp, 32(a0)
> + sw sp, 36(a0)
> + sw s8, 40(a0)
> + sw ra, 44(a0)
> + cfc1 t0,$31
> + swc1 $f20,48(a0)
> + swc1 $f21,52(a0)
> + swc1 $f22,56(a0)
> + swc1 $f23,60(a0)
> + swc1 $f24,64(a0)
> + swc1 $f25,68(a0)
> + swc1 $f26,72(a0)
> + swc1 $f27,76(a0)
> + swc1 $f28,80(a0)
> + swc1 $f29,84(a0)
> + swc1 $f30,88(a0)
> + swc1 $f31,92(a0)
> + sw t0,96(a0)
> + move v0,zero
> + jr ra
> +
> + END(setjmp)
> +
> +LEAF(longjmp)
> + lw s0, 0(a0)
> + lw s1, 4(a0)
> + lw s2, 8(a0)
> + lw s3, 12(a0)
> + lw s4, 16(a0)
> + lw s5, 20(a0)
> + lw s6, 24(a0)
> + lw s7, 28(a0)
> + lw gp, 32(a0)
> + lw sp, 36(a0)
> + lw s8, 40(a0)
> + lw ra, 44(a0)
> + lw t0, 96(a0)
> + lwc1 $f20,48(a0)
> + lwc1 $f21,52(a0)
> + lwc1 $f22,56(a0)
> + lwc1 $f23,60(a0)
> + lwc1 $f24,64(a0)
> + lwc1 $f25,68(a0)
> + lwc1 $f26,72(a0)
> + lwc1 $f27,76(a0)
> + lwc1 $f28,80(a0)
> + lwc1 $f29,84(a0)
> + lwc1 $f30,88(a0)
> + lwc1 $f31,92(a0)
> + ctc1 t0,$31
> + move v0,a1
> + jr ra
> +
> + END(longjmp)
> diff --git a/usr/klibc/arch/mips64/syscall.S b/usr/klibc/arch/mips64/syscall.S
> new file mode 100644
> index 0000000..cca0db2
> --- /dev/null
> +++ b/usr/klibc/arch/mips64/syscall.S
> @@ -0,0 +1,15 @@
> +#include <machine/asm.h>
> +#include <asm/unistd.h>
> +
> + .set noreorder
> +
> +LEAF(__syscall_common)
> + syscall
> + beqz a3, 1f
> + # sw is actually two instructions; the first one goes
> + # in the branch delay slot
> + # XXX: Break this up manually; as it is now it generates warnings.
> + sw v0, errno
> + li v0, -1
> +1: jr ra
> + END(__syscall_common)
> diff --git a/usr/klibc/arch/mips64/sysstub.ph b/usr/klibc/arch/mips64/sysstub.ph
> new file mode 100644
> index 0000000..3689529
> --- /dev/null
> +++ b/usr/klibc/arch/mips64/sysstub.ph
> @@ -0,0 +1,29 @@
> +# -*- perl -*-
> +#
> +# arch/mips/sysstub.ph
> +#
> +# Script to generate system call stubs
> +#
> +
> +# On MIPS, most system calls follow the standard convention, with the
> +# system call number in r0 (v0), return an error value in r19 (a3) as
> +# well as the return value in r0 (v0).
> +
> +sub make_sysstub($$$$$@) {
> + my($outputdir, $fname, $type, $sname, $stype, @args) = @_;
> +
> + $stype = $stype || 'common';
> + open(OUT, '>', "${outputdir}/${fname}.S");
> + print OUT "#include <machine/asm.h>\n";
> + print OUT "#include <asm/unistd.h>\n";
> + print OUT "\n";
> + print OUT "\t.set noreorder\n";
> + print OUT "\n";
> + print OUT "LEAF(${fname})\n";
> + print OUT "\tj\t__syscall_${stype}\n";
> + print OUT "\t li\tv0, __NR_${sname}\n";
> + print OUT "\tEND(${fname})\n";
> + close(OUT);
> +}
> +
> +1;
> diff --git a/usr/klibc/arch/mips64/vfork.S b/usr/klibc/arch/mips64/vfork.S
> new file mode 100644
> index 0000000..9aa955a
> --- /dev/null
> +++ b/usr/klibc/arch/mips64/vfork.S
> @@ -0,0 +1,15 @@
> +#include <machine/asm.h>
> +#include <asm/unistd.h>
> +
> +#define CLONE_VM 0x00000100
> +#define CLONE_VFORK 0x00004000
> +#define SIGCHLD 18
> +
> + .set noreorder
> +
> +LEAF(vfork)
> + li a0, CLONE_VFORK | CLONE_VM | SIGCHLD
> + li a1, 0
> + j __syscall_common
> + li v0, __NR_clone
> + END(vfork)
> --
> 1.8.3.4 (Apple Git-47)
>
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