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[PATCH v3 3/5] gdb: xtensa-linux: add call0 support
- From: Max Filippov <jcmvbkbc at gmail dot com>
- To: gdb-patches at sourceware dot org
- Cc: Maxim Grigoriev <maxim2405 at gmail dot com>, Woody LaRue <larue at cadence dot com>, Marc Gauthier <marc at cadence dot com>, Luis Machado <lgustavo at codesourcery dot com>, Max Filippov <jcmvbkbc at gmail dot com>
- Date: Wed, 22 Feb 2017 10:31:31 -0800
- Subject: [PATCH v3 3/5] gdb: xtensa-linux: add call0 support
- Authentication-results: sourceware.org; auth=none
- References: <1487788293-25987-1-git-send-email-jcmvbkbc@gmail.com>
Correctly handle a0- registers. This allows debugging call0 code in
linux natively.
The register structure is the same for windowed and call0 ABIs because
currently linux kernel internally requires windowed registers, so they are
always present.
gdb/
2017-01-18 Max Filippov <jcmvbkbc@gmail.com>
* xtensa-linux-nat.c (fill_gregset): Call regcache_raw_collect
for a single specified register or for all registers in
a0_base..a0_base + C0_NREGS range.
(supply_gregset_reg): Call regcache_raw_supply for a single
specified register or for all registers in a0_base..a0_base +
C0_NREGS range.
---
Changes v2->v3:
- drop C0_NREGS from the commit message.
Changes v1->v2:
- move directory name up in the commit message.
gdb/xtensa-linux-nat.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/gdb/xtensa-linux-nat.c b/gdb/xtensa-linux-nat.c
index afe15f6..e5a2d84 100644
--- a/gdb/xtensa-linux-nat.c
+++ b/gdb/xtensa-linux-nat.c
@@ -94,6 +94,20 @@ fill_gregset (const struct regcache *regcache,
gdbarch_tdep (gdbarch)->ar_base + i,
®s->ar[i]);
}
+ if (regnum >= gdbarch_tdep (gdbarch)->a0_base
+ && regnum < gdbarch_tdep (gdbarch)->a0_base + C0_NREGS)
+ regcache_raw_collect (regcache, regnum,
+ ®s->ar[(4 * regs->windowbase + regnum
+ - gdbarch_tdep (gdbarch)->a0_base)
+ % gdbarch_tdep (gdbarch)->num_aregs]);
+ else if (regnum == -1)
+ {
+ for (i = 0; i < C0_NREGS; ++i)
+ regcache_raw_collect (regcache,
+ gdbarch_tdep (gdbarch)->a0_base + i,
+ ®s->ar[(4 * regs->windowbase + i)
+ % gdbarch_tdep (gdbarch)->num_aregs]);
+ }
}
static void
@@ -146,6 +160,20 @@ supply_gregset_reg (struct regcache *regcache,
gdbarch_tdep (gdbarch)->ar_base + i,
®s->ar[i]);
}
+ if (regnum >= gdbarch_tdep (gdbarch)->a0_base
+ && regnum < gdbarch_tdep (gdbarch)->a0_base + C0_NREGS)
+ regcache_raw_supply (regcache, regnum,
+ ®s->ar[(4 * regs->windowbase + regnum
+ - gdbarch_tdep (gdbarch)->a0_base)
+ % gdbarch_tdep (gdbarch)->num_aregs]);
+ else if (regnum == -1)
+ {
+ for (i = 0; i < C0_NREGS; ++i)
+ regcache_raw_supply (regcache,
+ gdbarch_tdep (gdbarch)->a0_base + i,
+ ®s->ar[(4 * regs->windowbase + i)
+ % gdbarch_tdep (gdbarch)->num_aregs]);
+ }
}
void
--
2.1.4