diff options
Diffstat (limited to 'gcc/config/pa/pa.h')
| -rw-r--r-- | gcc/config/pa/pa.h | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/gcc/config/pa/pa.h b/gcc/config/pa/pa.h index 860b7590d98..a125aae2b9e 100644 --- a/gcc/config/pa/pa.h +++ b/gcc/config/pa/pa.h @@ -206,6 +206,20 @@ extern int target_flags; not for external calls. */ #define TARGET_LONG_PIC_PCREL_CALL 0 +/* Define to a C expression evaluating to true to use SOM secondary + definition symbols for weak support. Linker support for secondary + definition symbols is buggy prior to HP-UX 11.X. */ +#define TARGET_SOM_SDEF 0 + +/* Define to a C expression evaluating to true to save the entry value + of SP in the current frame marker. This is normally unnecessary. + However, the HP-UX unwind library looks at the SAVE_SP callinfo flag. + HP compilers don't use this flag but it is supported by the assembler. + We set this flag to indicate that register %r3 has been saved at the + start of the frame. Thus, when the HP unwind library is used, we + need to generate additional code to save SP into the frame marker. */ +#define TARGET_HPUX_UNWIND_LIBRARY 0 + /* Macro to define tables used to set the flags. This is a list in braces of target switches with each switch being { "NAME", VALUE, "HELP_STRING" }. VALUE is the bits to set, @@ -456,11 +470,12 @@ do { \ /* Boundary (in *bits*) on which stack pointer is always aligned; certain optimizations in combine depend on this. - GCC for the PA always rounds its stacks to a 8 * STACK_BOUNDARY - boundary, but that happens late in the compilation process. */ + The HP-UX runtime documents mandate 64-byte and 16-byte alignment for + the stack on the 32 and 64-bit ports, respectively. However, we + are only guaranteed that the stack is aligned to BIGGEST_ALIGNMENT + in main. Thus, we treat the former as the preferred alignment. */ #define STACK_BOUNDARY BIGGEST_ALIGNMENT - -#define PREFERRED_STACK_BOUNDARY (8 * STACK_BOUNDARY) +#define PREFERRED_STACK_BOUNDARY (TARGET_64BIT ? 128 : 512) /* Allocation boundary (in *bits*) for the code of a function. */ #define FUNCTION_BOUNDARY BITS_PER_WORD @@ -706,9 +721,13 @@ extern struct rtx_def *hppa_pic_save_rtx PARAMS ((void)); /* The weird HPPA calling conventions require a minimum of 48 bytes on the stack: 16 bytes for register saves, and 32 bytes for magic. This is the difference between the logical top of stack and the - actual sp. */ + actual sp. + + On the 64-bit port, the HP C compiler allocates a 48-byte frame + marker, although the runtime documentation only describes a 16 + byte marker. For compatibility, we allocate 48 bytes. */ #define STACK_POINTER_OFFSET \ - (TARGET_64BIT ? -(current_function_outgoing_args_size + 16): -32) + (TARGET_64BIT ? -(current_function_outgoing_args_size + 48): -32) #define STACK_DYNAMIC_OFFSET(FNDECL) \ (TARGET_64BIT \ |