mirror of
https://github.com/tobast/libunwind-eh_elf.git
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16bf4e5e49
Detect if current frame is a signal frame by checking for preceeding syscall instruction. For signal frames, update the cursor correctly from user context before calling dwarf_step.
87 lines
3.2 KiB
C
87 lines
3.2 KiB
C
/* Linux-specific definitions: */
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/* Define various structure offsets to simplify cross-compilation. */
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/* FIXME: Currently these are only used in getcontext.S, which is only used
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for a local unwinder, so we can use the compile-time ABI. At a later date
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we will want all three here, to use for signal handlers. Also, because
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of the three ABIs, gen-offsets.c can not quite generate this file. */
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/* Offsets for MIPS Linux "ucontext_t": */
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/* First 24 bytes in sigframe are argument save space and padding for
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what used to be signal trampolines. Ref: arch/mips/kernel/signal.c */
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#define LINUX_SF_TRAMP_SIZE 0x18
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#if _MIPS_SIM == _ABIO32
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# define LINUX_UC_FLAGS_OFF 0x0
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# define LINUX_UC_LINK_OFF 0x4
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# define LINUX_UC_STACK_OFF 0x8
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# define LINUX_UC_MCONTEXT_OFF 0x18
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# define LINUX_UC_SIGMASK_OFF 0x268
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# define LINUX_UC_MCONTEXT_PC 0x20
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# define LINUX_UC_MCONTEXT_GREGS 0x28
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#elif _MIPS_SIM == _ABIN32
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# define LINUX_UC_FLAGS_OFF 0x0
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# define LINUX_UC_LINK_OFF 0x4
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# define LINUX_UC_STACK_OFF 0x8
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# define LINUX_UC_MCONTEXT_OFF 0x18
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# define LINUX_UC_SIGMASK_OFF 0x270
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# define LINUX_UC_MCONTEXT_PC 0x258
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# define LINUX_UC_MCONTEXT_GREGS 0x18
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#elif _MIPS_SIM == _ABI64
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# define LINUX_UC_FLAGS_OFF 0x0
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# define LINUX_UC_LINK_OFF 0x8
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# define LINUX_UC_STACK_OFF 0x10
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# define LINUX_UC_MCONTEXT_OFF 0x28
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# define LINUX_UC_SIGMASK_OFF 0x280
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# define LINUX_UC_MCONTEXT_PC 0x268
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# define LINUX_UC_MCONTEXT_GREGS 0x28
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#else
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#error Unsupported ABI
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#endif
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#define LINUX_SC_R0_OFF (LINUX_UC_MCONTEXT_GREGS - LINUX_UC_MCONTEXT_OFF)
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#define LINUX_SC_R1_OFF (LINUX_SC_R0_OFF + 1*8)
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#define LINUX_SC_R2_OFF (LINUX_SC_R0_OFF + 2*8)
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#define LINUX_SC_R3_OFF (LINUX_SC_R0_OFF + 3*8)
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#define LINUX_SC_R4_OFF (LINUX_SC_R0_OFF + 4*8)
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#define LINUX_SC_R5_OFF (LINUX_SC_R0_OFF + 5*8)
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#define LINUX_SC_R6_OFF (LINUX_SC_R0_OFF + 6*8)
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#define LINUX_SC_R7_OFF (LINUX_SC_R0_OFF + 7*8)
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#define LINUX_SC_R8_OFF (LINUX_SC_R0_OFF + 8*8)
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#define LINUX_SC_R9_OFF (LINUX_SC_R0_OFF + 9*8)
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#define LINUX_SC_R10_OFF (LINUX_SC_R0_OFF + 10*8)
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#define LINUX_SC_R11_OFF (LINUX_SC_R0_OFF + 11*8)
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#define LINUX_SC_R12_OFF (LINUX_SC_R0_OFF + 12*8)
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#define LINUX_SC_R13_OFF (LINUX_SC_R0_OFF + 13*8)
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#define LINUX_SC_R14_OFF (LINUX_SC_R0_OFF + 14*8)
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#define LINUX_SC_R15_OFF (LINUX_SC_R0_OFF + 15*8)
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#define LINUX_SC_R16_OFF (LINUX_SC_R0_OFF + 16*8)
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#define LINUX_SC_R17_OFF (LINUX_SC_R0_OFF + 17*8)
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#define LINUX_SC_R18_OFF (LINUX_SC_R0_OFF + 18*8)
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#define LINUX_SC_R19_OFF (LINUX_SC_R0_OFF + 19*8)
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#define LINUX_SC_R20_OFF (LINUX_SC_R0_OFF + 20*8)
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#define LINUX_SC_R21_OFF (LINUX_SC_R0_OFF + 21*8)
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#define LINUX_SC_R22_OFF (LINUX_SC_R0_OFF + 22*8)
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#define LINUX_SC_R23_OFF (LINUX_SC_R0_OFF + 23*8)
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#define LINUX_SC_R24_OFF (LINUX_SC_R0_OFF + 24*8)
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#define LINUX_SC_R25_OFF (LINUX_SC_R0_OFF + 25*8)
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#define LINUX_SC_R26_OFF (LINUX_SC_R0_OFF + 26*8)
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#define LINUX_SC_R27_OFF (LINUX_SC_R0_OFF + 27*8)
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#define LINUX_SC_R28_OFF (LINUX_SC_R0_OFF + 28*8)
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#define LINUX_SC_R29_OFF (LINUX_SC_R0_OFF + 29*8)
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#define LINUX_SC_R30_OFF (LINUX_SC_R0_OFF + 30*8)
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#define LINUX_SC_R31_OFF (LINUX_SC_R0_OFF + 31*8)
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#define LINUX_SC_SP_OFF LINUX_SC_R29_OFF
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#define LINUX_SC_PC_OFF (LINUX_UC_MCONTEXT_PC - LINUX_UC_MCONTEXT_OFF)
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