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authorMiguel de Icaza <miguel@nuclecu.unam.mx>1997-09-21 22:52:31 +0000
committerMiguel de Icaza <miguel@nuclecu.unam.mx>1997-09-21 22:52:31 +0000
commit5904ec12c2f203f136022580edb88e92a55c7af2 (patch)
treee3b8faa398a2cdaf78e657086c5cd9ee32644942
parenta60d3d13629ce5482bb54cd95f2b74c22b052251 (diff)
Map the PRDA page on IRIX processes
-rw-r--r--arch/mips/kernel/irixelf.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/mips/kernel/irixelf.c b/arch/mips/kernel/irixelf.c
index 0b20d77f0..26ae60b9e 100644
--- a/arch/mips/kernel/irixelf.c
+++ b/arch/mips/kernel/irixelf.c
@@ -6,6 +6,7 @@
*
* Based upon work which is:
* Copyright 1993, 1994: Eric Youngdale (ericy@cais.com).
+ *
*/
#include <linux/module.h>
@@ -30,6 +31,8 @@
#include <asm/uaccess.h>
#include <asm/pgtable.h>
+#include <asm/mipsregs.h>
+#include <asm/prctl.h>
#include <linux/config.h>
@@ -575,6 +578,32 @@ static inline int map_interpreter(struct elf_phdr *epp, struct elfhdr *ihp,
return 0;
}
+/*
+ * IRIX maps a page at 0x200000 that holds information about the
+ * process and the system, here we map the page and fill the
+ * structure
+ */
+void irix_map_prda_page ()
+{
+ unsigned long v;
+ struct prda *pp;
+
+ v = do_mmap (NULL, PRDA_ADDRESS, PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC,
+ MAP_FIXED | MAP_PRIVATE, 0);
+
+ if (v < 0)
+ return;
+
+ pp = (struct prda *) v;
+ pp->prda_sys.t_pid = current->pid;
+ pp->prda_sys.t_prid = read_32bit_cp0_register (CP0_PRID);
+ pp->prda_sys.t_rpid = current->pid;
+
+ /* We leave the rest set to zero */
+}
+
+
+
/* These are the functions used to load ELF style executables and shared
* libraries. There is no binary dependent code anywhere else.
*/
@@ -761,6 +790,12 @@ static inline int do_load_irix_binary(struct linux_binprm * bprm,
*/
set_brk(elf_bss, elf_brk);
+ /*
+ * IRIX maps a page at 0x200000 which holds some system
+ * information. Programs depend on this.
+ */
+ irix_map_prda_page ();
+
padzero(elf_bss);
#ifdef DEBUG_ELF