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-rw-r--r--libc/sysdeps/linux/sh/sys/user.h56
1 files changed, 53 insertions, 3 deletions
diff --git a/libc/sysdeps/linux/sh/sys/user.h b/libc/sysdeps/linux/sh/sys/user.h
index 7f31bb62d..b1adc13b7 100644
--- a/libc/sysdeps/linux/sh/sys/user.h
+++ b/libc/sysdeps/linux/sh/sys/user.h
@@ -19,10 +19,60 @@
#ifndef _SYS_USER_H
#define _SYS_USER_H 1
-#include <features.h>
+#include <unistd.h>
+#include <asm/ptrace.h>
-#include <asm/user.h>
+/*
+ * Core file format: The core file is written in such a way that gdb
+ * can understand it and provide useful information to the user (under
+ * linux we use the `trad-core' bfd). The file contents are as follows:
+ *
+ * upage: 1 page consisting of a user struct that tells gdb
+ * what is present in the file. Directly after this is a
+ * copy of the task_struct, which is currently not used by gdb,
+ * but it may come in handy at some point. All of the registers
+ * are stored as part of the upage. The upage should always be
+ * only one page long.
+ * data: The data segment follows next. We use current->end_text to
+ * current->brk to pick up all of the user variables, plus any memory
+ * that may have been sbrk'ed. No attempt is made to determine if a
+ * page is demand-zero or if a page is totally unused, we just cover
+ * the entire range. All of the addresses are rounded in such a way
+ * that an integral number of pages is written.
+ * stack: We need the stack information in order to get a meaningful
+ * backtrace. We need to write the data from usp to
+ * current->start_stack, so we round each of these in order to be able
+ * to write an integer number of pages.
+ */
-#undef start_thread
+struct user_fpu_struct {
+ unsigned long fp_regs[16];
+ unsigned long xfp_regs[16];
+ unsigned long fpscr;
+ unsigned long fpul;
+};
+
+struct user {
+ struct pt_regs regs; /* entire machine state */
+ struct user_fpu_struct fpu; /* Math Co-processor registers */
+ int u_fpvalid; /* True if math co-processor being used */
+ size_t u_tsize; /* text size (pages) */
+ size_t u_dsize; /* data size (pages) */
+ size_t u_ssize; /* stack size (pages) */
+ unsigned long start_code; /* text starting address */
+ unsigned long start_data; /* data starting address */
+ unsigned long start_stack; /* stack starting address */
+ long int signal; /* signal causing core dump */
+ struct regs * u_ar0; /* help gdb find registers */
+ struct user_fpu_struct* u_fpstate; /* Math Co-processor pointer */
+ unsigned long magic; /* identifies a core file */
+ char u_comm[32]; /* user command name */
+};
+
+#define NBPG getpagesize()
+#define UPAGES 1
+#define HOST_TEXT_START_ADDR (u.start_code)
+#define HOST_DATA_START_ADDR (u.start_data)
+#define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG)
#endif /* sys/user.h */