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s390.c (struct s390_frame_layout): New struct as element of struct machine_function.
2004-08-12 Andreas Krebbel <krebbel1@de.ibm.com>
* config/s390/s390.c (struct s390_frame_layout): New struct as element
of struct machine_function.
(cfun->machine->frame_size): Moved into cfun->machine->frame_layout and
changed all uses.
(cfun->machine->save_fprs_p): Replaced by cfun_save_high_fprs and
changed all uses.
(cfun_frame_layout, cfun_save_high_fprs_p, cfun_gprs_save_area_size)
(cfun_set_fpr_bit, cfun_fpr_bit_p): New macros.
(s390_frame_area, s390_register_info): New functions.
(s390_optimize_prolog): Renamed to s390_optimize_prologue. Added check
for base register.
(s390_return_addr_rtx, s390_return_address_offset)
(s390_va_start, s390_gimplify_va_arg)
(s390_emit_prologue, s390_emit_epilogue): Adjusted for new stack
layouts.
(s390_frame_info): Functionality partly moved to s390_register_info.
Made adaptions for new stack layout.
(save_gprs, restore_gprs): Changed meaning of second parameter and
adapted all callers.
* config/s390/s390.h (s390_backchain_string): New global variable.
(MASK_BACKCHAIN): Removed definition.
(TARGET_BACKCHAIN): Changed check.
(TARGET_KERNEL_BACKCHAIN): New macro.
(TARGET_SWITCHES): Removed entries of "backchain" and "no-backchain".
(TARGET_OPTIONS): Added "backchain", "no-backchain" and
"kernel-backchain".
(DYNAMIC_CHAIN_ADDRESS): Adjusted for new stack layouts.
* config/s390/s390.md ("allocate_stack"): Added TARGET_KERNEL_BACKCHAIN
as condition. Adjusted for new stack layout.
* doc/invoke.texi: Added documentation for new option
"-mkernel-backchain" and adjusted documentation of "-mbackchain" and
"-mno-backchain".
From-SVN: r85882
This commit is contained in:
Andreas Krebbel
Ulrich Weigand
parent
faa03cf1b4
commit
adf39f8f5f
@ -1,3 +1,41 @@
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2004-08-12 Andreas Krebbel <krebbel1@de.ibm.com>
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* config/s390/s390.c (struct s390_frame_layout): New struct as element
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of struct machine_function.
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(cfun->machine->frame_size): Moved into cfun->machine->frame_layout and
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changed all uses.
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(cfun->machine->save_fprs_p): Replaced by cfun_save_high_fprs and
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changed all uses.
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(cfun_frame_layout, cfun_save_high_fprs_p, cfun_gprs_save_area_size)
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(cfun_set_fpr_bit, cfun_fpr_bit_p): New macros.
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(s390_frame_area, s390_register_info): New functions.
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(s390_optimize_prolog): Renamed to s390_optimize_prologue. Added check
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for base register.
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(s390_return_addr_rtx, s390_return_address_offset)
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(s390_va_start, s390_gimplify_va_arg)
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(s390_emit_prologue, s390_emit_epilogue): Adjusted for new stack
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layouts.
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(s390_frame_info): Functionality partly moved to s390_register_info.
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Made adaptions for new stack layout.
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(save_gprs, restore_gprs): Changed meaning of second parameter and
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adapted all callers.
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* config/s390/s390.h (s390_backchain_string): New global variable.
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(MASK_BACKCHAIN): Removed definition.
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(TARGET_BACKCHAIN): Changed check.
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(TARGET_KERNEL_BACKCHAIN): New macro.
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(TARGET_SWITCHES): Removed entries of "backchain" and "no-backchain".
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(TARGET_OPTIONS): Added "backchain", "no-backchain" and
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"kernel-backchain".
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(DYNAMIC_CHAIN_ADDRESS): Adjusted for new stack layouts.
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* config/s390/s390.md ("allocate_stack"): Added TARGET_KERNEL_BACKCHAIN
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as condition. Adjusted for new stack layout.
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* doc/invoke.texi: Added documentation for new option
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"-mkernel-backchain" and adjusted documentation of "-mbackchain" and
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"-mno-backchain".
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2004-08-12 Paul Brook <paul@codesourcery.com>
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* config/arm/lib1funcs.asm (ARM_FUNC_ALIAS): Also alias _L__name.
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File diff suppressed because it is too large
Load Diff
@ -60,6 +60,8 @@ extern enum processor_type s390_arch;
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extern enum processor_flags s390_arch_flags;
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extern const char *s390_arch_string;
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extern const char *s390_backchain_string;
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#define TARGET_CPU_IEEE_FLOAT \
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(s390_arch_flags & PF_IEEE_FLOAT)
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#define TARGET_CPU_ZARCH \
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@ -89,7 +91,6 @@ extern const char *s390_arch_string;
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extern int target_flags;
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#define MASK_HARD_FLOAT 0x01
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#define MASK_BACKCHAIN 0x02
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#define MASK_SMALL_EXEC 0x04
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#define MASK_DEBUG_ARG 0x08
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#define MASK_64BIT 0x10
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@ -100,7 +101,6 @@ extern int target_flags;
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#define TARGET_HARD_FLOAT (target_flags & MASK_HARD_FLOAT)
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#define TARGET_SOFT_FLOAT (!(target_flags & MASK_HARD_FLOAT))
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#define TARGET_BACKCHAIN (target_flags & MASK_BACKCHAIN)
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#define TARGET_SMALL_EXEC (target_flags & MASK_SMALL_EXEC)
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#define TARGET_DEBUG_ARG (target_flags & MASK_DEBUG_ARG)
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#define TARGET_64BIT (target_flags & MASK_64BIT)
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@ -110,6 +110,9 @@ extern int target_flags;
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#define TARGET_NO_FUSED_MADD (target_flags & MASK_NO_FUSED_MADD)
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#define TARGET_FUSED_MADD (! TARGET_NO_FUSED_MADD)
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#define TARGET_BACKCHAIN (s390_backchain_string[0] == '1')
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#define TARGET_KERNEL_BACKCHAIN (s390_backchain_string[0] == '2')
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/* ??? Once this actually works, it could be made a runtime option. */
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#define TARGET_IBM_FLOAT 0
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#define TARGET_IEEE_FLOAT 1
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@ -123,8 +126,6 @@ extern int target_flags;
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#define TARGET_SWITCHES \
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{ { "hard-float", 1, N_("Use hardware fp")}, \
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{ "soft-float", -1, N_("Don't use hardware fp")}, \
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{ "backchain", 2, N_("Set backchain")}, \
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{ "no-backchain", -2, N_("Don't set backchain (faster, but debug harder")},\
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{ "small-exec", 4, N_("Use bras for executable < 64k")}, \
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{ "no-small-exec", -4, N_("Don't use bras")}, \
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{ "debug", 8, N_("Additional debug prints")}, \
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@ -146,6 +147,12 @@ extern int target_flags;
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N_("Schedule code for given CPU"), 0}, \
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{ "arch=", &s390_arch_string, \
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N_("Generate code for given CPU"), 0}, \
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{ "backchain", &s390_backchain_string, \
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N_("Set backchain"), "1"}, \
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{ "no-backchain", &s390_backchain_string, \
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N_("Do not set backchain"), ""}, \
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{ "kernel-backchain", &s390_backchain_string, \
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N_("Set backchain appropriate for the linux kernel"), "2"}, \
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}
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/* Support for configure-time defaults. */
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@ -559,9 +566,13 @@ extern int current_function_outgoing_args_size;
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For frames farther back, we use the stack slot where
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the corresponding RETURN_REGNUM register was saved. */
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#define DYNAMIC_CHAIN_ADDRESS(FRAME) \
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((FRAME) != hard_frame_pointer_rtx ? (FRAME) : \
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plus_constant (arg_pointer_rtx, -STACK_POINTER_OFFSET))
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#define DYNAMIC_CHAIN_ADDRESS(FRAME) \
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(TARGET_BACKCHAIN ? \
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((FRAME) != hard_frame_pointer_rtx ? (FRAME) : \
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plus_constant (arg_pointer_rtx, -STACK_POINTER_OFFSET)) : \
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((FRAME) != hard_frame_pointer_rtx ? \
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plus_constant ((FRAME), STACK_POINTER_OFFSET - UNITS_PER_WORD) : \
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plus_constant (arg_pointer_rtx, -UNITS_PER_WORD)))
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#define RETURN_ADDR_RTX(COUNT, FRAME) \
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s390_return_addr_rtx ((COUNT), DYNAMIC_CHAIN_ADDRESS ((FRAME)))
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@ -7217,11 +7217,19 @@
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(plus (reg 15) (match_operand 1 "general_operand" "")))
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(set (match_operand 0 "general_operand" "")
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(reg 15))]
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"TARGET_BACKCHAIN"
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"TARGET_BACKCHAIN || TARGET_KERNEL_BACKCHAIN"
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{
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rtx stack = gen_rtx_REG (Pmode, STACK_POINTER_REGNUM);
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rtx chain = gen_rtx_MEM (Pmode, stack);
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rtx temp = gen_reg_rtx (Pmode);
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rtx chain;
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rtx temp;
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if (TARGET_KERNEL_BACKCHAIN)
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chain = plus_constant (stack, STACK_POINTER_OFFSET - UNITS_PER_WORD);
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else
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chain = stack;
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chain = gen_rtx_MEM (Pmode, chain);
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temp = gen_reg_rtx (Pmode);
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emit_move_insn (temp, chain);
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@ -617,7 +617,7 @@ See RS/6000 and PowerPC Options.
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@emph{S/390 and zSeries Options}
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@gccoptlist{-mtune=@var{cpu-type} -march=@var{cpu-type} @gol
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-mhard-float -msoft-float -mbackchain -mno-backchain @gol
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-mhard-float -msoft-float -mbackchain -mno-backchain -mkernel-backchain @gol
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-msmall-exec -mno-small-exec -mmvcle -mno-mvcle @gol
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-m64 -m31 -mdebug -mno-debug -mesa -mzarch @gol
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-mtpf-trace -mno-tpf-trace -mfused-madd -mno-fused-madd}
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@ -10454,13 +10454,27 @@ generates IEEE floating-point instructions. This is the default.
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@item -mbackchain
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@itemx -mno-backchain
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@itemx -mkernel-backchain
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@opindex mbackchain
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@opindex mno-backchain
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Generate (or do not generate) code which maintains an explicit
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backchain within the stack frame that points to the caller's frame.
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This may be needed to allow debugging using tools that do not understand
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DWARF-2 call frame information. The default is not to generate the
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backchain.
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@opindex mkernel-backchain
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In order to provide a backchain the address of the caller's frame
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is stored within the callee's stack frame.
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A backchain may be needed to allow debugging using tools that do not understand
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DWARF-2 call frame information.
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For @option{-mno-backchain} no backchain is maintained at all which is the
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default.
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If one of the other options is present the backchain pointer is placed either
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on top of the stack frame (@option{-mkernel-backchain}) or on
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the bottom (@option{-mbackchain}).
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Beside the different backchain location @option{-mkernel-backchain}
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also changes stack frame layout breaking the ABI. This option
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is intended to be used for code which internally needs a backchain but has
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to get by with a limited stack size e.g. the linux kernel.
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Internal unwinding code not using DWARF-2 info has to be able to locate the
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return address of a function. That will be eased be the fact that
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the return address of a function is placed two words below the backchain
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pointer.
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@item -msmall-exec
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@itemx -mno-small-exec
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