[klibc] [klibc 31/43] ppc support for klibc
H. Peter Anvin
hpa at zytor.com
Sun Jun 25 17:58:06 PDT 2006
The parts of klibc specific to the ppc architecture.
Signed-off-by: H. Peter Anvin <hpa at zytor.com>
---
commit a82c9b6e9b3428bae592241d1ac276054bc46fc5
tree 70852f39dd495c9bffc307d38f6da673d91ab08a
parent 078d6614054391efe17093f8d70340e2c0644ffb
author H. Peter Anvin <hpa at zytor.com> Sun, 25 Jun 2006 16:58:37 -0700
committer H. Peter Anvin <hpa at zytor.com> Sun, 25 Jun 2006 16:58:37 -0700
usr/include/arch/ppc/klibc/archconfig.h | 14 +++++++
usr/include/arch/ppc/klibc/archsetjmp.h | 36 ++++++++++++++++++
usr/include/arch/ppc/klibc/archsignal.h | 14 +++++++
usr/include/arch/ppc/klibc/archstat.h | 30 +++++++++++++++
usr/include/arch/ppc/klibc/archsys.h | 61 +++++++++++++++++++++++++++++++
usr/klibc/arch/ppc/MCONFIG | 29 +++++++++++++++
usr/klibc/arch/ppc/Makefile.inc | 22 +++++++++++
usr/klibc/arch/ppc/crt0.S | 23 ++++++++++++
usr/klibc/arch/ppc/setjmp.S | 34 +++++++++++++++++
usr/klibc/arch/ppc/syscall.S | 16 ++++++++
usr/klibc/arch/ppc/sysstub.ph | 25 +++++++++++++
11 files changed, 304 insertions(+), 0 deletions(-)
diff --git a/usr/include/arch/ppc/klibc/archconfig.h b/usr/include/arch/ppc/klibc/archconfig.h
new file mode 100644
index 0000000..ce04eee
--- /dev/null
+++ b/usr/include/arch/ppc/klibc/archconfig.h
@@ -0,0 +1,14 @@
+/*
+ * include/arch/ppc/klibc/archconfig.h
+ *
+ * See include/klibc/sysconfig.h for the options that can be set in
+ * this file.
+ *
+ */
+
+#ifndef _KLIBC_ARCHCONFIG_H
+#define _KLIBC_ARCHCONFIG_H
+
+/* All defaults */
+
+#endif /* _KLIBC_ARCHCONFIG_H */
diff --git a/usr/include/arch/ppc/klibc/archsetjmp.h b/usr/include/arch/ppc/klibc/archsetjmp.h
new file mode 100644
index 0000000..4be9ed6
--- /dev/null
+++ b/usr/include/arch/ppc/klibc/archsetjmp.h
@@ -0,0 +1,36 @@
+/*
+ * arch/ppc/include/klibc/archsetjmp.h
+ */
+
+#ifndef _KLIBC_ARCHSETJMP_H
+#define _KLIBC_ARCHSETJMP_H
+
+struct __jmp_buf {
+ unsigned long __r2;
+ unsigned long __sp;
+ unsigned long __lr;
+ unsigned long __cr;
+ unsigned long __r13;
+ unsigned long __r14;
+ unsigned long __r15;
+ unsigned long __r16;
+ unsigned long __r17;
+ unsigned long __r18;
+ unsigned long __r19;
+ unsigned long __r20;
+ unsigned long __r21;
+ unsigned long __r22;
+ unsigned long __r23;
+ unsigned long __r24;
+ unsigned long __r25;
+ unsigned long __r26;
+ unsigned long __r27;
+ unsigned long __r28;
+ unsigned long __r29;
+ unsigned long __r30;
+ unsigned long __r31;
+};
+
+typedef struct __jmp_buf jmp_buf[1];
+
+#endif /* _SETJMP_H */
diff --git a/usr/include/arch/ppc/klibc/archsignal.h b/usr/include/arch/ppc/klibc/archsignal.h
new file mode 100644
index 0000000..9c3ac92
--- /dev/null
+++ b/usr/include/arch/ppc/klibc/archsignal.h
@@ -0,0 +1,14 @@
+/*
+ * arch/ppc/include/klibc/archsignal.h
+ *
+ * Architecture-specific signal definitions
+ *
+ */
+
+#ifndef _KLIBC_ARCHSIGNAL_H
+#define _KLIBC_ARCHSIGNAL_H
+
+#include <asm/signal.h>
+/* No special stuff for this architecture */
+
+#endif
diff --git a/usr/include/arch/ppc/klibc/archstat.h b/usr/include/arch/ppc/klibc/archstat.h
new file mode 100644
index 0000000..9e31f4a
--- /dev/null
+++ b/usr/include/arch/ppc/klibc/archstat.h
@@ -0,0 +1,30 @@
+#ifndef _KLIBC_ARCHSTAT_H
+#define _KLIBC_ARCHSTAT_H
+
+#include <klibc/stathelp.h>
+
+#define _STATBUF_ST_NSEC
+
+/* This matches struct stat64 in glibc2.1.
+ */
+struct stat {
+ __stdev64 (st_dev); /* Device. */
+ unsigned long long st_ino; /* File serial number. */
+ unsigned int st_mode; /* File mode. */
+ unsigned int st_nlink; /* Link count. */
+ unsigned int st_uid; /* User ID of the file's owner. */
+ unsigned int st_gid; /* Group ID of the file's group. */
+ __stdev64 (st_rdev); /* Device number, if device. */
+ unsigned short int __pad2;
+ long long st_size; /* Size of file, in bytes. */
+ long st_blksize; /* Optimal block size for I/O. */
+
+ long long st_blocks; /* Number 512-byte blocks allocated. */
+ struct timespec st_atim; /* Time of last access. */
+ struct timespec st_mtim; /* Time of last modification. */
+ struct timespec st_ctim; /* Time of last status change. */
+ unsigned long int __unused4;
+ unsigned long int __unused5;
+};
+
+#endif
diff --git a/usr/include/arch/ppc/klibc/archsys.h b/usr/include/arch/ppc/klibc/archsys.h
new file mode 100644
index 0000000..24752da
--- /dev/null
+++ b/usr/include/arch/ppc/klibc/archsys.h
@@ -0,0 +1,61 @@
+/*
+ * arch/ppc/include/klibc/archsys.h
+ *
+ * Architecture-specific syscall definitions
+ */
+
+#ifndef _KLIBC_ARCHSYS_H
+#define _KLIBC_ARCHSYS_H
+
+/* PowerPC seems to lack _syscall6() in its headers */
+/* This seems to work on both 32- and 64-bit ppc */
+
+#ifndef _syscall6
+
+#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
+ type5,arg5,type6,arg6) \
+type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \
+{ \
+ unsigned long __sc_ret, __sc_err; \
+ { \
+ register unsigned long __sc_0 __asm__ ("r0"); \
+ register unsigned long __sc_3 __asm__ ("r3"); \
+ register unsigned long __sc_4 __asm__ ("r4"); \
+ register unsigned long __sc_5 __asm__ ("r5"); \
+ register unsigned long __sc_6 __asm__ ("r6"); \
+ register unsigned long __sc_7 __asm__ ("r7"); \
+ register unsigned long __sc_8 __asm__ ("r8"); \
+ \
+ __sc_3 = (unsigned long) (arg1); \
+ __sc_4 = (unsigned long) (arg2); \
+ __sc_5 = (unsigned long) (arg3); \
+ __sc_6 = (unsigned long) (arg4); \
+ __sc_7 = (unsigned long) (arg5); \
+ __sc_8 = (unsigned long) (arg6); \
+ __sc_0 = __NR_##name; \
+ __asm__ __volatile__ \
+ ("sc \n\t" \
+ "mfcr %1 " \
+ : "+r" (__sc_3), \
+ "+r" (__sc_0), \
+ "+r" (__sc_4), \
+ "+r" (__sc_5), \
+ "+r" (__sc_6), \
+ "+r" (__sc_7), \
+ "+r" (__sc_8) \
+ : : "cr0", "ctr", "memory", \
+ "r9", "r10", "r11", "r12"); \
+ __sc_ret = __sc_3; \
+ __sc_err = __sc_0; \
+ } \
+ if (__sc_err & 0x10000000) \
+ { \
+ errno = (int)__sc_ret; \
+ __sc_ret = -1; \
+ } \
+ return (type)__sc_ret; \
+}
+
+#endif /* _syscall6() missing */
+
+#endif /* _KLIBC_ARCHSYS_H */
diff --git a/usr/klibc/arch/ppc/MCONFIG b/usr/klibc/arch/ppc/MCONFIG
new file mode 100644
index 0000000..5410933
--- /dev/null
+++ b/usr/klibc/arch/ppc/MCONFIG
@@ -0,0 +1,29 @@
+# -*- makefile -*-
+#
+# arch/ppc/MCONFIG
+#
+# Special rules for this architecture. Note that this is actually
+# included from the main Makefile, and that pathnames should be
+# accordingly.
+#
+
+gcc_m32_option := $(call cc-option, -m32, )
+
+KLIBCOPTFLAGS = -Os
+KLIBCLDFLAGS = -m elf32ppclinux
+KLIBCARCHREQFLAGS += $(gcc_m32_option)
+
+KLIBCBITSIZE = 32
+
+# Extra linkflags when building the shared version of the library
+# This address needs to be reachable using normal inter-module
+# calls, and work on the memory models for this architecture
+# 256-16 MB - normal binaries start at 256 MB, and jumps are limited
+# to +/- 16 MB
+KLIBCSHAREDFLAGS = -Ttext 0x0f800200
+
+# The kernel so far has both asm-ppc* and asm-powerpc.
+KLIBCARCHINCFLAGS = -I$(KLIBCKERNELOBJ)arch/$(KLIBCARCH)/include
+
+# The asm include files live in asm-powerpc
+KLIBCASMARCH = powerpc
diff --git a/usr/klibc/arch/ppc/Makefile.inc b/usr/klibc/arch/ppc/Makefile.inc
new file mode 100644
index 0000000..53d99c4
--- /dev/null
+++ b/usr/klibc/arch/ppc/Makefile.inc
@@ -0,0 +1,22 @@
+# -*- makefile -*-
+#
+# arch/ppc/Makefile.inc
+#
+# Special rules for this architecture. Note that this is actually
+# included from the main Makefile, and that pathnames should be
+# accordingly.
+#
+
+KLIBCARCHOBJS = \
+ arch/$(KLIBCARCH)/setjmp.o \
+ arch/$(KLIBCARCH)/syscall.o \
+ libgcc/__divdi3.o \
+ libgcc/__moddi3.o \
+ libgcc/__udivdi3.o \
+ libgcc/__umoddi3.o \
+ libgcc/__udivmoddi4.o
+
+
+KLIBCARCHSOOBJS = $(patsubst %.o,%.lo,$(KLIBCARCHOBJS))
+
+archclean:
diff --git a/usr/klibc/arch/ppc/crt0.S b/usr/klibc/arch/ppc/crt0.S
new file mode 100644
index 0000000..85b6dca
--- /dev/null
+++ b/usr/klibc/arch/ppc/crt0.S
@@ -0,0 +1,23 @@
+#
+# arch/ppc/crt0.S
+#
+
+ .text
+ .align 4
+ .type _start, at function
+ .globl _start
+_start:
+ stwu 1,-16(1)
+ addi 3,1,16
+ /*
+ * the SVR4abippc.pdf specifies r7 as a pointer to
+ * a termination function point
+ * However, Section 8.4.1 of the LSB API docs say that
+ * The value to be placed into register r7, the termination
+ * function pointer, is not passed to the process.
+ * So we stub it out, instead.
+ */
+ li 4,0
+ bl __libc_init
+
+ .size _start,.-_start
diff --git a/usr/klibc/arch/ppc/setjmp.S b/usr/klibc/arch/ppc/setjmp.S
new file mode 100644
index 0000000..e02b7da
--- /dev/null
+++ b/usr/klibc/arch/ppc/setjmp.S
@@ -0,0 +1,34 @@
+#
+# arch/ppc/setjmp.S
+#
+# Basic setjmp/longjmp implementation
+# This file was derived from the equivalent file in NetBSD
+#
+
+ .text
+ .align 4
+ .type setjmp, at function
+ .globl setjmp
+setjmp:
+ mflr %r11 /* save return address */
+ mfcr %r12 /* save condition register */
+ mr %r10,%r1 /* save stack pointer */
+ mr %r9,%r2 /* save GPR2 (not needed) */
+ stmw %r9,0(%r3) /* save r9..r31 */
+ li %r3,0 /* indicate success */
+ blr /* return */
+
+ .size setjmp,.-setjmp
+
+ .type longjmp, at function
+ .globl longjmp
+longjmp:
+ lmw %r9,0(%r3) /* save r9..r31 */
+ mtlr %r11 /* restore LR */
+ mtcr %r12 /* restore CR */
+ mr %r2,%r9 /* restore GPR2 (not needed) */
+ mr %r1,%r10 /* restore stack */
+ mr %r3,%r4 /* get return value */
+ blr /* return */
+
+ .size longjmp,.-longjmp
diff --git a/usr/klibc/arch/ppc/syscall.S b/usr/klibc/arch/ppc/syscall.S
new file mode 100644
index 0000000..0a7c37c
--- /dev/null
+++ b/usr/klibc/arch/ppc/syscall.S
@@ -0,0 +1,16 @@
+/*
+ * arch/ppc/syscall.S
+ *
+ * Common error-handling path for system calls.
+ */
+
+ .text
+ .align 2
+ .globl __syscall_error
+ .type __syscall_error, at function
+__syscall_error:
+ lis 9,errno at ha
+ stw 3,errno at l(9)
+ li 3,-1
+ blr
+ .size __syscall_error,.-__syscall_error
diff --git a/usr/klibc/arch/ppc/sysstub.ph b/usr/klibc/arch/ppc/sysstub.ph
new file mode 100644
index 0000000..3b3916c
--- /dev/null
+++ b/usr/klibc/arch/ppc/sysstub.ph
@@ -0,0 +1,25 @@
+# -*- perl -*-
+#
+# arch/ppc/sysstub.ph
+#
+# Script to generate system call stubs
+#
+
+sub make_sysstub($$$$$@) {
+ my($outputdir, $fname, $type, $sname, $stype, @args) = @_;
+
+ open(OUT, '>', "${outputdir}/${fname}.S");
+ print OUT "#include <asm/unistd.h>\n";
+ print OUT "\n";
+ print OUT "\t.type ${fname},\@function\n";
+ print OUT "\t.globl ${fname}\n";
+ print OUT "${fname}:\n";
+ print OUT "\tli 0,__NR_${sname}\n";
+ print OUT "\tsc\n";
+ print OUT "\tbnslr\n";
+ print OUT "\tb __syscall_error\n";
+ print OUT "\t.size ${fname},.-${fname}\n";
+ close(OUT);
+}
+
+1;
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