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[gdb/tdep] Fix ARM_LINUX_JB_PC_EABI

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In arm-linux-tdep.c, ARM_LINUX_JB_PC_EABI is defined as 9, but it's been 1
since glibc 2.20.

See glibc commit 80a56cc3ee ("ARM: Add SystemTap probes to longjmp and
setjmp.").

Update it, allowing us to run into the gdb/26967 kfail.

Tested on arm-linux.

Approved-By: Luis Machado <luis.machado@arm.com>

PR arm/tdep
Bug: https://www.sourceware.org/bugzilla/show_bug.cgi?id=31089
This commit is contained in:
Tom de Vries 2024-06-07 13:59:46 +02:00
parent d89cd643c5
commit 1a7d840a21
1 changed files with 16 additions and 2 deletions
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18
gdb/arm-linux-tdep.c
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@ -101,12 +101,26 @@ static const gdb_byte arm_linux_thumb2_le_breakpoint[] = { 0xf0, 0xf7, 0x00, 0xa
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
SoftVFP or VFP (which implies EABI) then the PC is at offset 1 or 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 ARM_INT_REGISTER_SIZE
#define ARM_LINUX_JB_PC_FPA 21
#define ARM_LINUX_JB_PC_EABI 9
#ifdef __UCLIBC__
# define ARM_LINUX_JB_PC_EABI 9
#else
# ifdef __GLIBC__
# if __GLIBC_PREREQ(2, 20)
/* This has been 1 since glibc 2.20, see glibc commit 80a56cc3ee ("ARM: Add
SystemTap probes to longjmp and setjmp."). */
# define ARM_LINUX_JB_PC_EABI 1
# else
# define ARM_LINUX_JB_PC_EABI 9
# endif
# else
# define ARM_LINUX_JB_PC_EABI 9
# endif
#endif
/*
Dynamic Linking on ARM GNU/Linux