diff options
Diffstat (limited to 'sysdeps/alpha/bits')
| -rw-r--r-- | sysdeps/alpha/bits/setjmp.h | 79 |
1 files changed, 53 insertions, 26 deletions
diff --git a/sysdeps/alpha/bits/setjmp.h b/sysdeps/alpha/bits/setjmp.h index d461205c06..9aa30463d6 100644 --- a/sysdeps/alpha/bits/setjmp.h +++ b/sysdeps/alpha/bits/setjmp.h @@ -17,30 +17,57 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -typedef struct - { - /* Integer registers: - $0 is the return value; - $1-$8, $22-$25, $28 are call-used; - $9-$14 we save here; - $15 is the FP and we save it here; - $16-$21 are input arguments (call-used); - $26 is the return PC and we save it here; - $27 is the procedure value (i.e., the address of __setjmp); - $29 is the global pointer, which the caller will reconstruct - from the return address restored in $26; - $30 is the stack pointer and we save it here; - $31 is always zero. */ - long int __9, __10, __11, __12, __13, __14; - long int *__pc, *__fp, *__sp; +/* The previous bits/setjmp.h had __jmp_buf defined as a structure. + We use an array of 'long int' instead, to make writing the + assembler easier. Naturally, user code should not depend on + either representation. */ -#if 1 /* XXX need predefine for TARGET_FPREGS */ - /* Floating-point registers: - $f0 is the floating return value; - $f1, $f10-$f15, $f22-$f30 are call-used; - $f2-$f9 we save here; - $f16-$21 are input args (call-used); - $f31 is always zero. */ - double __f2, __f3, __f4, __f5, __f6, __f7, __f8, __f9; -#endif /* Have FP regs. */ - } __jmp_buf[1]; +/* + * Integer registers: + * $0 is the return value (va); + * $1-$8, $22-$25, $28 are call-used (t0-t7, t8-t11, at); + * $9-$14 we save here (s0-s5); + * $15 is the FP and we save it here (fp or s6); + * $16-$21 are input arguments (call-used) (a0-a5); + * $26 is the return PC and we save it here (ra); + * $27 is the procedure value (i.e., the address of __setjmp) (pv or t12); + * $29 is the global pointer, which the caller will reconstruct + * from the return address restored in $26 (gp); + * $30 is the stack pointer and we save it here (sp); + * $31 is always zero (zero). + * + * Floating-point registers: + * $f0 is the floating return value; + * $f1, $f10-$f15, $f22-$f30 are call-used; + * $f2-$f9 we save here; + * $f16-$21 are input args (call-used); + * $f31 is always zero. + * + * Note that even on Alpha hardware that does not have an FPU (there + * isn't such a thing currently) it is required to implement the FP + * registers. + */ + +#if defined(__USE_MISC) || defined(__ASSEMBLY__) +#define JB_S0 0 +#define JB_S1 1 +#define JB_S2 2 +#define JB_S3 3 +#define JB_S4 4 +#define JB_S5 5 +#define JB_PC 6 +#define JB_FP 7 +#define JB_SP 8 +#define JB_F2 9 +#define JB_F3 10 +#define JB_F4 11 +#define JB_F5 12 +#define JB_F6 13 +#define JB_F7 14 +#define JB_F8 15 +#define JB_F9 16 +#endif + +#ifndef __ASSEMBLY__ +typedef long int __jmp_buf[17]; +#endif |