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142 Commits (50bb9432c83966604cc158bd6971c0311133dc6d)

Author SHA1 Message Date
Bobby Bingham 55168fcb18 ppc32/64: simplify storage of stack parameters 
The switch statement is simpler as an if/else, and removing the argp
variable makes the code more symmetric between the register and stack
parameter cases.
 2019-04-05 14:18:20 -05:00
Bobby Bingham b500b054c7 ppc32/64: don't store uc_link on the stack 
This was previously stored either in the CR (ppc64) or LR (ppc32) save
area of the stack, or to one of the parameter save slots.

In either case, the saved value was unused.  This value is also passed
to __start_context via r31, so there's no need to pass it on the stack.
 2019-04-05 14:15:49 -05:00
Bobby Bingham b9bd4045fb ppc32/64: fix back chain pointer 
The ABI states that sp[0] should point to the previous stack frame, or be
zero if there is no previous stack frame.  makecontext previously set this
slot to point to the __start_context function, rather than to a valid
stack frame.
 2019-04-05 14:15:49 -05:00
Bobby Bingham b6a9b5e279 ppc32: fix stack alignment 
The stack should be 16-byte aligned, not 8 mod 16.
 2019-04-05 14:15:44 -05:00
Bobby Bingham cb59e7ee95 test calls to getcontext without makecontext 2019-04-05 13:28:36 -05:00
Bobby Bingham 94216c60c4 test ability to pass 10 args through makecontext 2019-04-05 13:28:36 -05:00
A. Wilcox 6046eb47e4
Reorder registers in other x86_64 assembler files 
This fixes the previous commit which changed the register order in
swapcontext only, which caused setcontext to subtly corrupt the stack.
 2018-07-19 17:18:19 -05:00
William Pitcock 4f190cc561
Merge pull request #10 from fabled/master 
fix x86_64 register order for swapcontext
 2018-07-19 00:33:12 -05:00
Timo Teräs 790ed28aff fix x86_64 register order for swapcontext 
rbp and rsi were reversed causing argument passing to fail since
rsi is used to pass 2nd argument.

fixes #9
 2018-07-18 15:47:27 +03:00
William Pitcock 7b1a302ed4 README: we support s390x now 2018-02-15 05:55:26 +00:00
William Pitcock a76df6b81a arch: add s390x port 2018-02-15 05:54:17 +00:00
William Pitcock f0741bc7a0 build: use -lucontext instead of libucontext.so in linker flags for test program 2018-02-15 04:41:22 +00:00
William Pitcock f370b25ffc ppc64: trampoline: cleanups 2018-02-15 04:36:47 +00:00
William Pitcock f4d92bb7bd ppc: trampoline: cleanups 2018-02-15 04:36:36 +00:00
William Pitcock 0622245f06 x86_64: trampoline: do same cleanups as in x86 2018-02-15 04:34:37 +00:00
William Pitcock ef2fa49912 x86: trampoline: fix GOT clobbering, pointed out by fabled 2018-02-15 04:32:16 +00:00
William Pitcock 556da6ce99 x86/x86_64: getcontext: no need to restore %ecx or %rcx 2018-02-14 05:12:09 +00:00
William Pitcock 0143bbac98 x86: trampoline: kill textrel 2018-02-14 03:37:25 +00:00
William Pitcock 70089a405c build: use absolute path for LD_LIBRARY_PATH when testing 2018-02-14 03:30:50 +00:00
William Pitcock 79415db5a8 README: update for 0.1.0 2018-02-14 03:06:01 +00:00
William Pitcock 0188f29771 build: remove test_libucontext on make clean 2018-02-14 03:01:35 +00:00
William Pitcock 71979e9cf6 arch: ppc64: now working 2018-02-06 08:05:53 +00:00
William Pitcock 9e5aba6b48 arch: add ppc64 port does not work yet 2018-02-06 06:19:44 +00:00
William Pitcock 8ff8bb3280 README: note that ppc implementation uses kernel assistance 2018-02-02 18:51:55 +00:00
William Pitcock f3fe8ea781 arch: ppc: new port 2018-02-02 18:46:21 +00:00
William Pitcock 66919bb222 README: x86 now supported 2018-02-01 01:28:19 +00:00
William Pitcock c28af0399e build: rebuild test program if it is modified 2018-02-01 01:27:13 +00:00
William Pitcock ee1526c903 arch: add x86 port 2018-02-01 01:26:34 +00:00
William Pitcock 54a31e566d test_libucontext: explain the stack poisoning part 2018-01-31 23:23:45 +00:00
William Pitcock 13283f5eba arch: add aarch64 port 2018-01-31 21:23:18 +00:00
William Pitcock 3f63152bbc build: add -Iarch/${ARCH} to CFLAGS 2018-01-31 20:37:00 +00:00
William Pitcock b686d707b2 build: fix arch detection 2018-01-31 05:58:26 +00:00
William Pitcock e43fc2698a README: we support ARM 2018-01-31 04:13:42 +00:00
William Pitcock a6dfb59ef2 build: default ARCH to $(uname -m) 2018-01-31 04:13:32 +00:00
William Pitcock f17103b6f4 build: build testsuite with -ggdb3 2018-01-31 04:12:09 +00:00
William Pitcock 247f30400c arch: arm: add armv6+ port 2018-01-31 04:11:46 +00:00
William Pitcock 0e437d3fc7 add README 2018-01-30 03:56:01 +00:00
William Pitcock 29225e0974 build: add libucontext test program 2018-01-30 03:53:04 +00:00
William Pitcock da10e5a66d implement ucontext functions on x86_64 2018-01-30 03:41:02 +00:00
William Pitcock 6062fc83b1 don't bother with glibc stuff afterall, kernel defines ABI to use 2018-01-29 21:50:49 +00:00
William Pitcock f1d1976e7a add symbols.h 2018-01-29 17:05:35 +00:00
William Pitcock 816d0fdb91
Initial commit 2018-01-29 10:23:18 -06:00