diff options
| author | Miguel de Icaza <miguel@nuclecu.unam.mx> | 1997-09-21 22:52:31 +0000 |
|---|---|---|
| committer | Miguel de Icaza <miguel@nuclecu.unam.mx> | 1997-09-21 22:52:31 +0000 |
| commit | 5904ec12c2f203f136022580edb88e92a55c7af2 (patch) | |
| tree | e3b8faa398a2cdaf78e657086c5cd9ee32644942 /arch | |
| parent | a60d3d13629ce5482bb54cd95f2b74c22b052251 (diff) | |
Map the PRDA page on IRIX processes
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/kernel/irixelf.c | 35 |
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 |