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* config/arm/lib1funcs.asm (cfi_pop, cfi_push, cfi_start)
(cfi_end): New macros. (RETLDM): Use cfi_pop. Expect an eight byte stack frame. (ARM_LDIV0, THUMB_LDIV0, DIV_FUNC_END): Use CFI macros. Create an eight byte stack frame. (__NR_tkill): Define. (__div0): Use gettid tkill on GNU/Linux. (_arm_return): Add CFI. (Lchange_\register, .Lchange_lr): Create an eight byte stack frame. From-SVN: r99834
This commit is contained in:
Daniel Jacobowitz
Daniel Jacobowitz
parent
7032df40d1
commit
d0f11b1653
@ -1,3 +1,15 @@
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2005-05-17 Daniel Jacobowitz <dan@codesourcery.com>
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* config/arm/lib1funcs.asm (cfi_pop, cfi_push, cfi_start)
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(cfi_end): New macros.
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(RETLDM): Use cfi_pop. Expect an eight byte stack frame.
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(ARM_LDIV0, THUMB_LDIV0, DIV_FUNC_END): Use CFI macros. Create
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an eight byte stack frame.
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(__NR_tkill): Define.
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(__div0): Use gettid tkill on GNU/Linux.
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(_arm_return): Add CFI.
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(Lchange_\register, .Lchange_lr): Create an eight byte stack frame.
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2005-05-17 Daniel Jacobowitz <dan@codesourcery.com>
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* configure.ac: Remove spaces around assignment to
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@ -116,19 +116,82 @@ Boston, MA 02111-1307, USA. */
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#endif
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.macro cfi_pop advance, reg, cfa_offset
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#ifdef __ELF__
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.pushsection .debug_frame
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.byte 0x4 /* DW_CFA_advance_loc4 */
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.4byte \advance
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.byte (0xc0 | \reg) /* DW_CFA_restore */
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.byte 0xe /* DW_CFA_def_cfa_offset */
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.uleb128 \cfa_offset
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.popsection
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#endif
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.endm
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.macro cfi_push advance, reg, offset, cfa_offset
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#ifdef __ELF__
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.pushsection .debug_frame
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.byte 0x4 /* DW_CFA_advance_loc4 */
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.4byte \advance
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.byte (0x80 | \reg) /* DW_CFA_offset */
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.uleb128 (\offset / -4)
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.byte 0xe /* DW_CFA_def_cfa_offset */
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.uleb128 \cfa_offset
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.popsection
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#endif
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.endm
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.macro cfi_start start_label, end_label
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#ifdef __ELF__
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.pushsection .debug_frame
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LSYM(Lstart_frame):
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.4byte LSYM(Lend_cie) - LSYM(Lstart_cie) @ Length of CIE
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LSYM(Lstart_cie):
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.4byte 0xffffffff @ CIE Identifier Tag
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.byte 0x1 @ CIE Version
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.ascii "\0" @ CIE Augmentation
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.uleb128 0x1 @ CIE Code Alignment Factor
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.sleb128 -4 @ CIE Data Alignment Factor
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.byte 0xe @ CIE RA Column
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.byte 0xc @ DW_CFA_def_cfa
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.uleb128 0xd
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.uleb128 0x0
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.align 2
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LSYM(Lend_cie):
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.4byte LSYM(Lend_fde)-LSYM(Lstart_fde) @ FDE Length
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LSYM(Lstart_fde):
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.4byte LSYM(Lstart_frame) @ FDE CIE offset
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.4byte \start_label @ FDE initial location
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.4byte \end_label-\start_label @ FDE address range
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.popsection
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#endif
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.endm
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.macro cfi_end end_label
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#ifdef __ELF__
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.pushsection .debug_frame
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.align 2
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LSYM(Lend_fde):
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.popsection
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\end_label:
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#endif
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.endm
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/* Don't pass dirn, it's there just to get token pasting right. */
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.macro RETLDM regs=, cond=, dirn=ia
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.macro RETLDM regs=, cond=, unwind=, dirn=ia
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#if defined (__INTERWORKING__)
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.ifc "\regs",""
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ldr\cond lr, [sp], #4
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ldr\cond lr, [sp], #8
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.else
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ldm\cond\dirn sp!, {\regs, lr}
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.endif
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.ifnc "\unwind", ""
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/* Mark LR as restored. */
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97: cfi_pop 97b - \unwind, 0xe, 0x0
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.endif
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bx\cond lr
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#else
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.ifc "\regs",""
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ldr\cond pc, [sp], #4
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ldr\cond pc, [sp], #8
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.else
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ldm\cond\dirn sp!, {\regs, pc}
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.endif
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@ -136,25 +199,25 @@ Boston, MA 02111-1307, USA. */
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.endm
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.macro ARM_LDIV0
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LSYM(Ldiv0):
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str lr, [sp, #-4]!
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.macro ARM_LDIV0 name
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str lr, [sp, #-8]!
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98: cfi_push 98b - __\name, 0xe, -0x8, 0x8
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bl SYM (__div0) __PLT__
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mov r0, #0 @ About as wrong as it could be.
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RETLDM
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RETLDM unwind=98b
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.endm
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.macro THUMB_LDIV0
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LSYM(Ldiv0):
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push { lr }
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.macro THUMB_LDIV0 name
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push { r1, lr }
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98: cfi_push 98b - __\name, 0xe, -0x4, 0x8
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bl SYM (__div0)
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mov r0, #0 @ About as wrong as it could be.
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#if defined (__INTERWORKING__)
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pop { r1 }
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bx r1
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pop { r1, r2 }
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bx r2
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#else
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pop { pc }
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pop { r1, pc }
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#endif
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.endm
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@ -163,12 +226,14 @@ LSYM(Ldiv0):
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.endm
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.macro DIV_FUNC_END name
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cfi_start __\name, LSYM(Lend_div0)
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LSYM(Ldiv0):
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#ifdef __thumb__
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THUMB_LDIV0
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THUMB_LDIV0 \name
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#else
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ARM_LDIV0
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ARM_LDIV0 \name
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#endif
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cfi_end LSYM(Lend_div0)
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FUNC_END \name
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.endm
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@ -923,16 +988,24 @@ LSYM(Lover12):
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#define __NR_SYSCALL_BASE 0x900000
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#define __NR_getpid (__NR_SYSCALL_BASE+ 20)
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#define __NR_kill (__NR_SYSCALL_BASE+ 37)
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#define __NR_gettid (__NR_SYSCALL_BASE+ 224)
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#define __NR_tkill (__NR_SYSCALL_BASE+ 238)
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.code 32
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FUNC_START div0
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stmfd sp!, {r1, lr}
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swi __NR_getpid
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swi __NR_gettid
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cmn r0, #1000
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swihs __NR_getpid
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cmnhs r0, #1000
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RETLDM r1 hs
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mov ip, r0
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mov r1, #SIGFPE
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swi __NR_kill
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swi __NR_tkill
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movs r0, r0
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movne r0, ip
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swine __NR_kill
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RETLDM r1
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FUNC_END div0
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@ -1137,8 +1210,14 @@ LSYM(Lover12):
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.code 32
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.globl _arm_return
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LSYM(Lstart_arm_return):
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cfi_start LSYM(Lstart_arm_return) LSYM(Lend_arm_return)
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cfi_push 0, 0xe, -0x8, 0x8
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nop @ This nop is for the benefit of debuggers, so that
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@ backtraces will use the correct unwind information.
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_arm_return:
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RETLDM
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RETLDM unwind=LSYM(Lstart_arm_return)
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cfi_end LSYM(Lend_arm_return)
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.globl _arm_return_r7
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_arm_return_r7:
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@ -1179,7 +1258,7 @@ _arm_return_r11:
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.globl LSYM(Lchange_\register)
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LSYM(Lchange_\register):
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tst \register, #1
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streq lr, [sp, #-4]!
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streq lr, [sp, #-8]!
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adreq lr, _arm_return
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bx \register
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@ -1216,7 +1295,7 @@ LSYM(Lchange_\register):
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.globl .Lchange_lr
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.Lchange_lr:
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tst lr, #1
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stmeqdb r13!, {lr}
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stmeqdb r13!, {lr, pc}
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mov ip, lr
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adreq lr, _arm_return
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bx ip
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