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authorLuis Machado <luis.machado@linaro.org>2020-12-22 17:45:21 -0300
committerLuis Machado <luis.machado@linaro.org>2021-01-04 12:18:31 -0300
commit098caef485a4ece6096e6cdbb4cd9726e4a13386 (patch)
treebc5808e3f19fbcdf402c9c5e11a52dacff679412 /gdb/csky-tdep.c
parentdbb078f66ecfe2d50fd3e03463b5b206a8eed243 (diff)
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Refactor struct trad_frame_saved_regs
The following patch drops the overloading going on with the trad_frame_saved_reg struct and defines a new struct with a KIND enum and a union of different fields. The new struct looks like this: struct trad_frame_saved_reg { setters/getters ... private: trad_frame_saved_reg_kind m_kind; union { LONGEST value; int realreg; LONGEST addr; const gdb_byte *value_bytes; } m_reg; }; And the enums look like this: /* Describes the kind of encoding a stored register has. */ enum class trad_frame_saved_reg_kind { /* Register value is unknown. */ UNKNOWN = 0, /* Register value is a constant. */ VALUE, /* Register value is in another register. */ REALREG, /* Register value is at an address. */ ADDR, /* Register value is a sequence of bytes. */ VALUE_BYTES }; The patch also adds setters/getters and updates all the users of the old struct. It is worth mentioning that due to the previous overloaded nature of the fields, some tdep files like to store negative offsets and indexes in the ADDR field, so I kept the ADDR as LONGEST instead of CORE_ADDR. Those cases may be better supported by a new enum entry. I have not addressed those cases in this patch to prevent unwanted breakage, given I have no way to test some of the targets. But it would be nice to clean those up eventually. The change to frame-unwind.* is to constify the parameter being passed to the unwinding functions, given we now accept a "const gdb_byte *" for value bytes. Tested on aarch64-linux/Ubuntu 20.04/18.04 and by building GDB with --enable-targets=all. gdb/ChangeLog: 2021-01-04 Luis Machado <luis.machado@linaro.org> Update all users of trad_frame_saved_reg to use the new member functions. Remote all struct keywords from declarations of trad_frame_saved_reg types, except on forward declarations. * aarch64-tdep.c: Update. * alpha-mdebug-tdep.c: Update. * alpha-tdep.c: Update. * arc-tdep.c: Update. * arm-tdep.c: Update. * avr-tdep.c: Update. * cris-tdep.c: Update. * csky-tdep.c: Update. * frv-tdep.c: Update. * hppa-linux-tdep.c: Update. * hppa-tdep.c: Update. * hppa-tdep.h: Update. * lm32-tdep.c: Update. * m32r-linux-tdep.c: Update. * m32r-tdep.c: Update. * m68hc11-tdep.c: Update. * mips-tdep.c: Update. * moxie-tdep.c: Update. * riscv-tdep.c: Update. * rs6000-tdep.c: Update. * s390-linux-tdep.c: Update. * s390-tdep.c: Update. * score-tdep.c: Update. * sparc-netbsd-tdep.c: Update. * sparc-sol2-tdep.c: Update. * sparc64-fbsd-tdep.c: Update. * sparc64-netbsd-tdep.c: Update. * sparc64-obsd-tdep.c: Update. * sparc64-sol2-tdep.c: Update. * tilegx-tdep.c: Update. * v850-tdep.c: Update. * vax-tdep.c: Update. * frame-unwind.c (frame_unwind_got_bytes): Make parameter const. * frame-unwind.h (frame_unwind_got_bytes): Likewise. * trad-frame.c: Update. Remove TF_REG_* enum. (trad_frame_alloc_saved_regs): Add a static assertion to check for a trivially-constructible struct. (trad_frame_reset_saved_regs): Adjust to use member function. (trad_frame_value_p): Likewise. (trad_frame_addr_p): Likewise. (trad_frame_realreg_p): Likewise. (trad_frame_value_bytes_p): Likewise. (trad_frame_set_value): Likewise. (trad_frame_set_realreg): Likewise. (trad_frame_set_addr): Likewise. (trad_frame_set_unknown): Likewise. (trad_frame_set_value_bytes): Likewise. (trad_frame_get_prev_register): Likewise. * trad-frame.h: Update. (trad_frame_saved_reg_kind): New enum. (struct trad_frame_saved_reg) <addr, realreg, data>: Remove. <m_kind, m_reg>: New member fields. <set_value, set_realreg, set_addr, set_unknown, set_value_bytes> <kind, value, realreg, addr, value_bytes, is_value, is_realreg> <is_addr, is_unknown, is_value_bytes>: New member functions.
Diffstat (limited to 'gdb/csky-tdep.c')
-rw-r--r--gdb/csky-tdep.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/gdb/csky-tdep.c b/gdb/csky-tdep.c
index 6d9df53..55ebca6 100644
--- a/gdb/csky-tdep.c
+++ b/gdb/csky-tdep.c
@@ -502,7 +502,7 @@ struct csky_unwind_cache
int framereg;
/* Saved register offsets. */
- struct trad_frame_saved_reg *saved_regs;
+ trad_frame_saved_reg *saved_regs;
};
/* Do prologue analysis, returning the PC of the first instruction
@@ -1459,17 +1459,17 @@ csky_analyze_prologue (struct gdbarch *gdbarch,
{
if (register_offsets[rn] >= 0)
{
- this_cache->saved_regs[rn].addr
- = this_cache->prev_sp - register_offsets[rn];
+ this_cache->saved_regs[rn].set_addr (this_cache->prev_sp
+ - register_offsets[rn]);
if (csky_debug)
{
CORE_ADDR rn_value = read_memory_unsigned_integer (
- this_cache->saved_regs[rn].addr, 4, byte_order);
+ this_cache->saved_regs[rn].addr (), 4, byte_order);
fprintf_unfiltered (gdb_stdlog, "Saved register %s "
"stored at 0x%08lx, value=0x%08lx\n",
csky_register_names[rn],
(unsigned long)
- this_cache->saved_regs[rn].addr,
+ this_cache->saved_regs[rn].addr (),
(unsigned long) rn_value);
}
}