Commit 612a95b4 authored by Andi Kleen's avatar Andi Kleen Committed by Ingo Molnar

x86: remove iBCS support

ibcs2 support has never been supported on 2.6 kernels as far as I know,
and if it has it must have been an external patch.  Anyways, if anybody
applies an external patch they could as well readd the ibcs checking
code to the ELF loader in the same patch.  But there is no reason to
keep this code running in all Linux kernels.  This will save at least
two strcmps each ELF execution.

No deprecation period because it could not have been used anyway.
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent f8f76481
...@@ -595,7 +595,6 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs) ...@@ -595,7 +595,6 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
int load_addr_set = 0; int load_addr_set = 0;
char * elf_interpreter = NULL; char * elf_interpreter = NULL;
unsigned int interpreter_type = INTERPRETER_NONE; unsigned int interpreter_type = INTERPRETER_NONE;
unsigned char ibcs2_interpreter = 0;
unsigned long error; unsigned long error;
struct elf_phdr *elf_ppnt, *elf_phdata; struct elf_phdr *elf_ppnt, *elf_phdata;
unsigned long elf_bss, elf_brk; unsigned long elf_bss, elf_brk;
...@@ -713,14 +712,6 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs) ...@@ -713,14 +712,6 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
if (elf_interpreter[elf_ppnt->p_filesz - 1] != '\0') if (elf_interpreter[elf_ppnt->p_filesz - 1] != '\0')
goto out_free_interp; goto out_free_interp;
/* If the program interpreter is one of these two,
* then assume an iBCS2 image. Otherwise assume
* a native linux image.
*/
if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 ||
strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0)
ibcs2_interpreter = 1;
/* /*
* The early SET_PERSONALITY here is so that the lookup * The early SET_PERSONALITY here is so that the lookup
* for the interpreter happens in the namespace of the * for the interpreter happens in the namespace of the
...@@ -740,7 +731,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs) ...@@ -740,7 +731,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
* switch really is going to happen - do this in * switch really is going to happen - do this in
* flush_thread(). - akpm * flush_thread(). - akpm
*/ */
SET_PERSONALITY(loc->elf_ex, ibcs2_interpreter); SET_PERSONALITY(loc->elf_ex, 0);
interpreter = open_exec(elf_interpreter); interpreter = open_exec(elf_interpreter);
retval = PTR_ERR(interpreter); retval = PTR_ERR(interpreter);
...@@ -819,7 +810,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs) ...@@ -819,7 +810,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
goto out_free_dentry; goto out_free_dentry;
} else { } else {
/* Executables without an interpreter also need a personality */ /* Executables without an interpreter also need a personality */
SET_PERSONALITY(loc->elf_ex, ibcs2_interpreter); SET_PERSONALITY(loc->elf_ex, 0);
} }
/* OK, we are done with that, now set up the arg stuff, /* OK, we are done with that, now set up the arg stuff,
...@@ -853,7 +844,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs) ...@@ -853,7 +844,7 @@ static int load_elf_binary(struct linux_binprm *bprm, struct pt_regs *regs)
/* Do this immediately, since STACK_TOP as used in setup_arg_pages /* Do this immediately, since STACK_TOP as used in setup_arg_pages
may depend on the personality. */ may depend on the personality. */
SET_PERSONALITY(loc->elf_ex, ibcs2_interpreter); SET_PERSONALITY(loc->elf_ex, 0);
if (elf_read_implies_exec(loc->elf_ex, executable_stack)) if (elf_read_implies_exec(loc->elf_ex, executable_stack))
current->personality |= READ_IMPLIES_EXEC; current->personality |= READ_IMPLIES_EXEC;
......
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