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ARM: sfi_sp assembler macro

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This commit is contained in:
Roland McGrath 2013-03-15 09:32:16 -07:00
parent a7ac752299
commit 1362a2aa4e
3 changed files with 9 additions and 1 deletions
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3
ports/ChangeLog.arm
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@ -1,5 +1,8 @@
2013-03-15 Roland McGrath <roland@hack.frob.com> 2013-03-15 Roland McGrath <roland@hack.frob.com>
* sysdeps/arm/sysdep.h [!ARM_SFI_MACROS] (sfi_sp): New macro.
* sysdeps/arm/__longjmp.S: Use it.
* sysdeps/arm/sysdep.h [!ARM_SFI_MACROS] * sysdeps/arm/sysdep.h [!ARM_SFI_MACROS]
(ARM_SFI_MACROS): Define it. (ARM_SFI_MACROS): Define it.
(sfi_breg, sfi_pld): New assembler macros. (sfi_breg, sfi_pld): New assembler macros.

2
ports/sysdeps/arm/__longjmp.S
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@ -36,7 +36,7 @@ ENTRY (__longjmp)
cfi_undefined (r4) cfi_undefined (r4)
CHECK_SP (r4) CHECK_SP (r4)
#endif #endif
sfi_breg ip, \ sfi_sp sfi_breg ip, \
ldmia \B!, JMP_BUF_REGLIST ldmia \B!, JMP_BUF_REGLIST
cfi_restore (v1) cfi_restore (v1)
cfi_restore (v2) cfi_restore (v2)

5
ports/sysdeps/arm/sysdep.h
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@ -250,6 +250,11 @@
pld [\basereg, \offset] pld [\basereg, \offset]
.endm .endm
/* This macro precedes any instruction that directly changes the SP.
It's not needed for push/pop or for any kind of load or store that
implicitly changes the SP via the ! syntax. */
# define sfi_sp /* Nothing to do. */
# endif # endif
#endif /* __ASSEMBLER__ */ #endif /* __ASSEMBLER__ */