diff options
Diffstat (limited to 'arch/parisc/kernel/binfmt_elf32.c')
| -rw-r--r-- | arch/parisc/kernel/binfmt_elf32.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/arch/parisc/kernel/binfmt_elf32.c b/arch/parisc/kernel/binfmt_elf32.c new file mode 100644 index 000000000000..d1833f164bbe --- /dev/null +++ b/arch/parisc/kernel/binfmt_elf32.c @@ -0,0 +1,126 @@ +/* + * Support for 32-bit Linux/Parisc ELF binaries on 64 bit kernels + * + * Copyright (C) 2000 John Marvin + * Copyright (C) 2000 Hewlett Packard Co. + * + * Heavily inspired from various other efforts to do the same thing + * (ia64,sparc64/mips64) + */ + +/* Make sure include/asm-parisc/elf.h does the right thing */ + +#define ELF_CLASS ELFCLASS32 + +#define ELF_CORE_COPY_REGS(dst, pt) \ + memset(dst, 0, sizeof(dst)); /* don't leak any "random" bits */ \ + { int i; \ + for (i = 0; i < 32; i++) dst[i] = (elf_greg_t) pt->gr[i]; \ + for (i = 0; i < 8; i++) dst[32 + i] = (elf_greg_t) pt->sr[i]; \ + } \ + dst[40] = (elf_greg_t) pt->iaoq[0]; dst[41] = (elf_greg_t) pt->iaoq[1]; \ + dst[42] = (elf_greg_t) pt->iasq[0]; dst[43] = (elf_greg_t) pt->iasq[1]; \ + dst[44] = (elf_greg_t) pt->sar; dst[45] = (elf_greg_t) pt->iir; \ + dst[46] = (elf_greg_t) pt->isr; dst[47] = (elf_greg_t) pt->ior; \ + dst[48] = (elf_greg_t) mfctl(22); dst[49] = (elf_greg_t) mfctl(0); \ + dst[50] = (elf_greg_t) mfctl(24); dst[51] = (elf_greg_t) mfctl(25); \ + dst[52] = (elf_greg_t) mfctl(26); dst[53] = (elf_greg_t) mfctl(27); \ + dst[54] = (elf_greg_t) mfctl(28); dst[55] = (elf_greg_t) mfctl(29); \ + dst[56] = (elf_greg_t) mfctl(30); dst[57] = (elf_greg_t) mfctl(31); \ + dst[58] = (elf_greg_t) mfctl( 8); dst[59] = (elf_greg_t) mfctl( 9); \ + dst[60] = (elf_greg_t) mfctl(12); dst[61] = (elf_greg_t) mfctl(13); \ + dst[62] = (elf_greg_t) mfctl(10); dst[63] = (elf_greg_t) mfctl(15); + + +typedef unsigned int elf_greg_t; + +#include <linux/spinlock.h> +#include <asm/processor.h> +#include <linux/module.h> +#include <linux/elfcore.h> +#include <linux/compat.h> /* struct compat_timeval */ + +#define elf_prstatus elf_prstatus32 +struct elf_prstatus32 +{ + struct elf_siginfo pr_info; /* Info associated with signal */ + short pr_cursig; /* Current signal */ + unsigned int pr_sigpend; /* Set of pending signals */ + unsigned int pr_sighold; /* Set of held signals */ + pid_t pr_pid; + pid_t pr_ppid; + pid_t pr_pgrp; + pid_t pr_sid; + struct compat_timeval pr_utime; /* User time */ + struct compat_timeval pr_stime; /* System time */ + struct compat_timeval pr_cutime; /* Cumulative user time */ + struct compat_timeval pr_cstime; /* Cumulative system time */ + elf_gregset_t pr_reg; /* GP registers */ + int pr_fpvalid; /* True if math co-processor being used. */ +}; + +#define elf_prpsinfo elf_prpsinfo32 +struct elf_prpsinfo32 +{ + char pr_state; /* numeric process state */ + char pr_sname; /* char for pr_state */ + char pr_zomb; /* zombie */ + char pr_nice; /* nice val */ + unsigned int pr_flag; /* flags */ + u16 pr_uid; + u16 pr_gid; + pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; + /* Lots missing */ + char pr_fname[16]; /* filename of executable */ + char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ +}; + +#define elf_addr_t unsigned int +#define init_elf_binfmt init_elf32_binfmt + +#define ELF_PLATFORM ("PARISC32\0") + +/* + * We should probably use this macro to set a flag somewhere to indicate + * this is a 32 on 64 process. We could use PER_LINUX_32BIT, or we + * could set a processor dependent flag in the thread_struct. + */ + +#define SET_PERSONALITY(ex, ibcs2) \ + current->personality = PER_LINUX32; \ + current->thread.map_base = DEFAULT_MAP_BASE32; \ + current->thread.task_size = DEFAULT_TASK_SIZE32 \ + +#undef cputime_to_timeval +#define cputime_to_timeval cputime_to_compat_timeval +static __inline__ void +cputime_to_compat_timeval(const cputime_t cputime, struct compat_timeval *value) +{ + unsigned long jiffies = cputime_to_jiffies(cputime); + value->tv_usec = (jiffies % HZ) * (1000000L / HZ); + value->tv_sec = jiffies / HZ; +} + +#include "../../../fs/binfmt_elf.c" + +/* Set up a separate execution domain for ELF32 binaries running + * on an ELF64 kernel */ + +static struct exec_domain parisc32_exec_domain = { + .name = "Linux/ELF32", + .pers_low = PER_LINUX32, + .pers_high = PER_LINUX32, +}; + +static int __init parisc32_exec_init(void) +{ + /* steal the identity signal mappings from the default domain */ + parisc32_exec_domain.signal_map = default_exec_domain.signal_map; + parisc32_exec_domain.signal_invmap = default_exec_domain.signal_invmap; + + register_exec_domain(&parisc32_exec_domain); + + return 0; +} + +__initcall(parisc32_exec_init); |