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initial commit of the arm port

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this port assumes eabi calling conventions, eabi linux syscall
convention, and presence of the kernel helpers at 0xffff0f?0 needed
for threads support. otherwise it makes very few assumptions, and the
code should work even on armv4 without thumb support, as well as on
systems with thumb interworking. the bits headers declare this a
little endian system, but as far as i can tell the code should work
equally well on big endian.

some small details are probably broken; so far, testing has been
limited to qemu/aboriginal linux.
This commit is contained in:
Rich Felker 2011-09-18 16:44:54 -04:00
commit d960d4f2cb
36 changed files with 2225 additions and 0 deletions
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40
arch/arm/bits/user.h Normal file
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struct user_fpregs
{
struct fp_reg {
unsigned sign1:1;
unsigned unused:15;
unsigned sign2:1;
unsigned exponent:14;
unsigned j:1;
unsigned mantissa1:31;
unsigned mantissa0:32;
} fpregs[8];
unsigned fpsr:32;
unsigned fpcr:32;
unsigned char ftype[8];
unsigned int init_flag;
};
struct user_regs
{
unsigned long uregs[18];
};
struct user
{
struct user_regs regs;
int u_fpvalid;
unsigned long u_tsize;
unsigned long u_dsize;
unsigned long u_ssize;
unsigned long start_code;
unsigned long start_stack;
long signal;
int reserved;
struct user_regs *u_ar0;
unsigned long int magic;
char u_comm[32];
int u_debugreg[8];
struct user_fpregs u_fp;
struct user_fpregs *u_fp0;
};