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Matthew Gretton-Dann 2010-04-29 16:34:25 +00:00
parent e66408edfd
commit f8624c62cc
2 changed files with 38 additions and 3 deletions
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9
gdb/ChangeLog
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@ -1,3 +1,12 @@
2010-04-29 Matthew Gretton-Dann <matthew.gretton-dann@arm.com>
* arm-linux-tdep.c (ARM_LINUX_JB_PC): Remove.
(ARM_LINUX_JB_PC_FPA): Add, offset of PC in longjmp buffer for FPA.
(ARM_LINUX_JB_PC_EABI): Add, offset of PC in longjmp buffer for
EABI.
(arm_linux_init_abi): Set up JB_PC field dependent on FP model in
use.
2010-04-29 Pedro Alves <pedro@codesourcery.com>
PR gdb/11557

32
gdb/arm-linux-tdep.c
View File

@ -82,9 +82,20 @@ static const char arm_linux_thumb2_be_breakpoint[] = { 0xf7, 0xf0, 0xa0, 0x00 };
static const char arm_linux_thumb2_le_breakpoint[] = { 0xf0, 0xf7, 0x00, 0xa0 };
/* Description of the longjmp buffer. */
/* Description of the longjmp buffer. The buffer is treated as an array of
elements of size ARM_LINUX_JB_ELEMENT_SIZE.
The location of saved registers in this buffer (in particular the PC
to use after longjmp is called) varies depending on the ABI (in
particular the FP model) and also (possibly) the C Library.
For glibc, eglibc, and uclibc the following holds: If the FP model is
SoftVFP or VFP (which implies EABI) then the PC is at offset 9 in the
buffer. This is also true for the SoftFPA model. However, for the FPA
model the PC is at offset 21 in the buffer. */
#define ARM_LINUX_JB_ELEMENT_SIZE INT_REGISTER_SIZE
#define ARM_LINUX_JB_PC 21
#define ARM_LINUX_JB_PC_FPA 21
#define ARM_LINUX_JB_PC_EABI 9
/*
Dynamic Linking on ARM GNU/Linux
@ -877,7 +888,22 @@ arm_linux_init_abi (struct gdbarch_info info,
if (tdep->fp_model == ARM_FLOAT_AUTO)
tdep->fp_model = ARM_FLOAT_FPA;
tdep->jb_pc = ARM_LINUX_JB_PC;
switch (tdep->fp_model)
{
case ARM_FLOAT_FPA:
tdep->jb_pc = ARM_LINUX_JB_PC_FPA;
break;
case ARM_FLOAT_SOFT_FPA:
case ARM_FLOAT_SOFT_VFP:
case ARM_FLOAT_VFP:
tdep->jb_pc = ARM_LINUX_JB_PC_EABI;
break;
default:
internal_error
(__FILE__, __LINE__,
_("arm_linux_init_abi: Floating point model not supported"));
break;
}
tdep->jb_elt_size = ARM_LINUX_JB_ELEMENT_SIZE;
set_solib_svr4_fetch_link_map_offsets